diff options
Diffstat (limited to 'vendor/github.com/graph-gophers')
53 files changed, 6553 insertions, 0 deletions
diff --git a/vendor/github.com/graph-gophers/graphql-go/.gitignore b/vendor/github.com/graph-gophers/graphql-go/.gitignore new file mode 100644 index 00000000..2fa95abe --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/.gitignore @@ -0,0 +1,5 @@ +/.idea +/.vscode +/internal/validation/testdata/graphql-js +/internal/validation/testdata/node_modules +/vendor diff --git a/vendor/github.com/graph-gophers/graphql-go/.golangci.yml b/vendor/github.com/graph-gophers/graphql-go/.golangci.yml new file mode 100644 index 00000000..c6741d58 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/.golangci.yml @@ -0,0 +1,35 @@ +run: + timeout: 5m + +linters-settings: + gofmt: + simplify: true + govet: + check-shadowing: true + enable-all: true + disable: + - fieldalignment + - deepequalerrors # remove later + +linters: + disable-all: true + enable: + - deadcode + - gofmt + - gosimple + - govet + - ineffassign + - exportloopref + - structcheck + - staticcheck + - unconvert + - unused + - varcheck + - misspell + - goimports + +issues: + exclude-rules: + - linters: + - unused + path: "graphql_test.go"
\ No newline at end of file diff --git a/vendor/github.com/graph-gophers/graphql-go/CHANGELOG.md b/vendor/github.com/graph-gophers/graphql-go/CHANGELOG.md new file mode 100644 index 00000000..e5f48c06 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/CHANGELOG.md @@ -0,0 +1,10 @@ +CHANGELOG + +[v1.1.0](https://github.com/graph-gophers/graphql-go/releases/tag/v1.1.0) Release v1.1.0 +* [FEATURE] Add types package #437 +* [FEATURE] Expose `packer.Unmarshaler` as `decode.Unmarshaler` to the public #450 +* [FEATURE] Add location fields to type definitions #454 +* [FEATURE] `errors.Errorf` preserves original error similar to `fmt.Errorf` #456 +* [BUGFIX] Fix duplicated __typename in response (fixes #369) #443 + +[v1.0.0](https://github.com/graph-gophers/graphql-go/releases/tag/v1.0.0) Initial release diff --git a/vendor/github.com/graph-gophers/graphql-go/CONTRIBUTING.md b/vendor/github.com/graph-gophers/graphql-go/CONTRIBUTING.md new file mode 100644 index 00000000..a2cffca8 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/CONTRIBUTING.md @@ -0,0 +1,13 @@ +## Contributing + +- With issues: + - Use the search tool before opening a new issue. + - Please provide source code and commit sha if you found a bug. + - Review existing issues and provide feedback or react to them. + +- With pull requests: + - Open your pull request against `master` + - Your pull request should have no more than two commits, if not you should squash them. + - It should pass all tests in the available continuous integrations systems such as TravisCI. + - You should add/modify tests to cover your proposed code changes. + - If your pull request contains a new feature, please document it on the README.
\ No newline at end of file diff --git a/vendor/github.com/graph-gophers/graphql-go/LICENSE b/vendor/github.com/graph-gophers/graphql-go/LICENSE new file mode 100644 index 00000000..3907ceca --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/LICENSE @@ -0,0 +1,24 @@ +Copyright (c) 2016 Richard Musiol. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/graph-gophers/graphql-go/README.md b/vendor/github.com/graph-gophers/graphql-go/README.md new file mode 100644 index 00000000..87b020c1 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/README.md @@ -0,0 +1,169 @@ +# graphql-go [](https://sourcegraph.com/github.com/graph-gophers/graphql-go?badge) [](https://graph-gophers.semaphoreci.com/projects/graphql-go) [](https://godoc.org/github.com/graph-gophers/graphql-go) + +<p align="center"><img src="docs/img/logo.png" width="300"></p> + +The goal of this project is to provide full support of the [GraphQL draft specification](https://facebook.github.io/graphql/draft) with a set of idiomatic, easy to use Go packages. + +While still under heavy development (`internal` APIs are almost certainly subject to change), this library is +safe for production use. + +## Features + +- minimal API +- support for `context.Context` +- support for the `OpenTracing` standard +- schema type-checking against resolvers +- resolvers are matched to the schema based on method sets (can resolve a GraphQL schema with a Go interface or Go struct). +- handles panics in resolvers +- parallel execution of resolvers +- subscriptions + - [sample WS transport](https://github.com/graph-gophers/graphql-transport-ws) + +## Roadmap + +We're trying out the GitHub Project feature to manage `graphql-go`'s [development roadmap](https://github.com/graph-gophers/graphql-go/projects/1). +Feedback is welcome and appreciated. + +## (Some) Documentation + +### Basic Sample + +```go +package main + +import ( + "log" + "net/http" + + graphql "github.com/graph-gophers/graphql-go" + "github.com/graph-gophers/graphql-go/relay" +) + +type query struct{} + +func (_ *query) Hello() string { return "Hello, world!" } + +func main() { + s := ` + type Query { + hello: String! + } + ` + schema := graphql.MustParseSchema(s, &query{}) + http.Handle("/query", &relay.Handler{Schema: schema}) + log.Fatal(http.ListenAndServe(":8080", nil)) +} +``` + +To test: + +```sh +curl -XPOST -d '{"query": "{ hello }"}' localhost:8080/query +``` + +### Resolvers + +A resolver must have one method or field for each field of the GraphQL type it resolves. The method or field name has to be [exported](https://golang.org/ref/spec#Exported_identifiers) and match the schema's field's name in a non-case-sensitive way. +You can use struct fields as resolvers by using `SchemaOpt: UseFieldResolvers()`. For example, +``` +opts := []graphql.SchemaOpt{graphql.UseFieldResolvers()} +schema := graphql.MustParseSchema(s, &query{}, opts...) +``` + +When using `UseFieldResolvers` schema option, a struct field will be used *only* when: +- there is no method for a struct field +- a struct field does not implement an interface method +- a struct field does not have arguments + +The method has up to two arguments: + +- Optional `context.Context` argument. +- Mandatory `*struct { ... }` argument if the corresponding GraphQL field has arguments. The names of the struct fields have to be [exported](https://golang.org/ref/spec#Exported_identifiers) and have to match the names of the GraphQL arguments in a non-case-sensitive way. + +The method has up to two results: + +- The GraphQL field's value as determined by the resolver. +- Optional `error` result. + +Example for a simple resolver method: + +```go +func (r *helloWorldResolver) Hello() string { + return "Hello world!" +} +``` + +The following signature is also allowed: + +```go +func (r *helloWorldResolver) Hello(ctx context.Context) (string, error) { + return "Hello world!", nil +} +``` + +### Schema Options + +- `UseStringDescriptions()` enables the usage of double quoted and triple quoted. When this is not enabled, comments are parsed as descriptions instead. +- `UseFieldResolvers()` specifies whether to use struct field resolvers. +- `MaxDepth(n int)` specifies the maximum field nesting depth in a query. The default is 0 which disables max depth checking. +- `MaxParallelism(n int)` specifies the maximum number of resolvers per request allowed to run in parallel. The default is 10. +- `Tracer(tracer trace.Tracer)` is used to trace queries and fields. It defaults to `trace.OpenTracingTracer`. +- `ValidationTracer(tracer trace.ValidationTracer)` is used to trace validation errors. It defaults to `trace.NoopValidationTracer`. +- `Logger(logger log.Logger)` is used to log panics during query execution. It defaults to `exec.DefaultLogger`. +- `PanicHandler(panicHandler errors.PanicHandler)` is used to transform panics into errors during query execution. It defaults to `errors.DefaultPanicHandler`. +- `DisableIntrospection()` disables introspection queries. + +### Custom Errors + +Errors returned by resolvers can include custom extensions by implementing the `ResolverError` interface: + +```go +type ResolverError interface { + error + Extensions() map[string]interface{} +} +``` + +Example of a simple custom error: + +```go +type droidNotFoundError struct { + Code string `json:"code"` + Message string `json:"message"` +} + +func (e droidNotFoundError) Error() string { + return fmt.Sprintf("error [%s]: %s", e.Code, e.Message) +} + +func (e droidNotFoundError) Extensions() map[string]interface{} { + return map[string]interface{}{ + "code": e.Code, + "message": e.Message, + } +} +``` + +Which could produce a GraphQL error such as: + +```go +{ + "errors": [ + { + "message": "error [NotFound]: This is not the droid you are looking for", + "path": [ + "droid" + ], + "extensions": { + "code": "NotFound", + "message": "This is not the droid you are looking for" + } + } + ], + "data": null +} +``` + +### [Examples](https://github.com/graph-gophers/graphql-go/wiki/Examples) + +### [Companies that use this library](https://github.com/graph-gophers/graphql-go/wiki/Users) diff --git a/vendor/github.com/graph-gophers/graphql-go/decode/decode.go b/vendor/github.com/graph-gophers/graphql-go/decode/decode.go new file mode 100644 index 00000000..56a9d5b5 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/decode/decode.go @@ -0,0 +1,13 @@ +package decode + +// Unmarshaler defines the api of Go types mapped to custom GraphQL scalar types +type Unmarshaler interface { + // ImplementsGraphQLType maps the implementing custom Go type + // to the GraphQL scalar type in the schema. + ImplementsGraphQLType(name string) bool + // UnmarshalGraphQL is the custom unmarshaler for the implementing type + // + // This function will be called whenever you use the + // custom GraphQL scalar type as an input + UnmarshalGraphQL(input interface{}) error +} diff --git a/vendor/github.com/graph-gophers/graphql-go/errors/errors.go b/vendor/github.com/graph-gophers/graphql-go/errors/errors.go new file mode 100644 index 00000000..0f9340b1 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/errors/errors.go @@ -0,0 +1,59 @@ +package errors + +import ( + "fmt" +) + +type QueryError struct { + Err error `json:"-"` // Err holds underlying if available + Message string `json:"message"` + Locations []Location `json:"locations,omitempty"` + Path []interface{} `json:"path,omitempty"` + Rule string `json:"-"` + ResolverError error `json:"-"` + Extensions map[string]interface{} `json:"extensions,omitempty"` +} + +type Location struct { + Line int `json:"line"` + Column int `json:"column"` +} + +func (a Location) Before(b Location) bool { + return a.Line < b.Line || (a.Line == b.Line && a.Column < b.Column) +} + +func Errorf(format string, a ...interface{}) *QueryError { + // similar to fmt.Errorf, Errorf will wrap the last argument if it is an instance of error + var err error + if n := len(a); n > 0 { + if v, ok := a[n-1].(error); ok { + err = v + } + } + + return &QueryError{ + Err: err, + Message: fmt.Sprintf(format, a...), + } +} + +func (err *QueryError) Error() string { + if err == nil { + return "<nil>" + } + str := fmt.Sprintf("graphql: %s", err.Message) + for _, loc := range err.Locations { + str += fmt.Sprintf(" (line %d, column %d)", loc.Line, loc.Column) + } + return str +} + +func (err *QueryError) Unwrap() error { + if err == nil { + return nil + } + return err.Err +} + +var _ error = &QueryError{} diff --git a/vendor/github.com/graph-gophers/graphql-go/errors/panic_handler.go b/vendor/github.com/graph-gophers/graphql-go/errors/panic_handler.go new file mode 100644 index 00000000..5446c2a9 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/errors/panic_handler.go @@ -0,0 +1,18 @@ +package errors + +import ( + "context" +) + +// PanicHandler is the interface used to create custom panic errors that occur during query execution +type PanicHandler interface { + MakePanicError(ctx context.Context, value interface{}) *QueryError +} + +// DefaultPanicHandler is the default PanicHandler +type DefaultPanicHandler struct{} + +// MakePanicError creates a new QueryError from a panic that occurred during execution +func (h *DefaultPanicHandler) MakePanicError(ctx context.Context, value interface{}) *QueryError { + return Errorf("panic occurred: %v", value) +} diff --git a/vendor/github.com/graph-gophers/graphql-go/graphql.go b/vendor/github.com/graph-gophers/graphql-go/graphql.go new file mode 100644 index 00000000..76a6434d --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/graphql.go @@ -0,0 +1,339 @@ +package graphql + +import ( + "context" + "encoding/json" + "fmt" + "time" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/common" + "github.com/graph-gophers/graphql-go/internal/exec" + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/internal/exec/selected" + "github.com/graph-gophers/graphql-go/internal/query" + "github.com/graph-gophers/graphql-go/internal/schema" + "github.com/graph-gophers/graphql-go/internal/validation" + "github.com/graph-gophers/graphql-go/introspection" + "github.com/graph-gophers/graphql-go/log" + "github.com/graph-gophers/graphql-go/trace" + "github.com/graph-gophers/graphql-go/types" +) + +// ParseSchema parses a GraphQL schema and attaches the given root resolver. It returns an error if +// the Go type signature of the resolvers does not match the schema. If nil is passed as the +// resolver, then the schema can not be executed, but it may be inspected (e.g. with ToJSON). +func ParseSchema(schemaString string, resolver interface{}, opts ...SchemaOpt) (*Schema, error) { + s := &Schema{ + schema: schema.New(), + maxParallelism: 10, + tracer: trace.OpenTracingTracer{}, + logger: &log.DefaultLogger{}, + panicHandler: &errors.DefaultPanicHandler{}, + } + for _, opt := range opts { + opt(s) + } + + if s.validationTracer == nil { + if tracer, ok := s.tracer.(trace.ValidationTracerContext); ok { + s.validationTracer = tracer + } else { + s.validationTracer = &validationBridgingTracer{tracer: trace.NoopValidationTracer{}} + } + } + + if err := schema.Parse(s.schema, schemaString, s.useStringDescriptions); err != nil { + return nil, err + } + if err := s.validateSchema(); err != nil { + return nil, err + } + + r, err := resolvable.ApplyResolver(s.schema, resolver) + if err != nil { + return nil, err + } + s.res = r + + return s, nil +} + +// MustParseSchema calls ParseSchema and panics on error. +func MustParseSchema(schemaString string, resolver interface{}, opts ...SchemaOpt) *Schema { + s, err := ParseSchema(schemaString, resolver, opts...) + if err != nil { + panic(err) + } + return s +} + +// Schema represents a GraphQL schema with an optional resolver. +type Schema struct { + schema *types.Schema + res *resolvable.Schema + + maxDepth int + maxParallelism int + tracer trace.Tracer + validationTracer trace.ValidationTracerContext + logger log.Logger + panicHandler errors.PanicHandler + useStringDescriptions bool + disableIntrospection bool + subscribeResolverTimeout time.Duration +} + +func (s *Schema) ASTSchema() *types.Schema { + return s.schema +} + +// SchemaOpt is an option to pass to ParseSchema or MustParseSchema. +type SchemaOpt func(*Schema) + +// UseStringDescriptions enables the usage of double quoted and triple quoted +// strings as descriptions as per the June 2018 spec +// https://facebook.github.io/graphql/June2018/. When this is not enabled, +// comments are parsed as descriptions instead. +func UseStringDescriptions() SchemaOpt { + return func(s *Schema) { + s.useStringDescriptions = true + } +} + +// UseFieldResolvers specifies whether to use struct field resolvers +func UseFieldResolvers() SchemaOpt { + return func(s *Schema) { + s.schema.UseFieldResolvers = true + } +} + +// MaxDepth specifies the maximum field nesting depth in a query. The default is 0 which disables max depth checking. +func MaxDepth(n int) SchemaOpt { + return func(s *Schema) { + s.maxDepth = n + } +} + +// MaxParallelism specifies the maximum number of resolvers per request allowed to run in parallel. The default is 10. +func MaxParallelism(n int) SchemaOpt { + return func(s *Schema) { + s.maxParallelism = n + } +} + +// Tracer is used to trace queries and fields. It defaults to trace.OpenTracingTracer. +func Tracer(tracer trace.Tracer) SchemaOpt { + return func(s *Schema) { + s.tracer = tracer + } +} + +// ValidationTracer is used to trace validation errors. It defaults to trace.NoopValidationTracer. +// Deprecated: context is needed to support tracing correctly. Use a Tracer which implements trace.ValidationTracerContext. +func ValidationTracer(tracer trace.ValidationTracer) SchemaOpt { //nolint:staticcheck + return func(s *Schema) { + s.validationTracer = &validationBridgingTracer{tracer: tracer} + } +} + +// Logger is used to log panics during query execution. It defaults to exec.DefaultLogger. +func Logger(logger log.Logger) SchemaOpt { + return func(s *Schema) { + s.logger = logger + } +} + +// PanicHandler is used to customize the panic errors during query execution. +// It defaults to errors.DefaultPanicHandler. +func PanicHandler(panicHandler errors.PanicHandler) SchemaOpt { + return func(s *Schema) { + s.panicHandler = panicHandler + } +} + +// DisableIntrospection disables introspection queries. +func DisableIntrospection() SchemaOpt { + return func(s *Schema) { + s.disableIntrospection = true + } +} + +// SubscribeResolverTimeout is an option to control the amount of time +// we allow for a single subscribe message resolver to complete it's job +// before it times out and returns an error to the subscriber. +func SubscribeResolverTimeout(timeout time.Duration) SchemaOpt { + return func(s *Schema) { + s.subscribeResolverTimeout = timeout + } +} + +// Response represents a typical response of a GraphQL server. It may be encoded to JSON directly or +// it may be further processed to a custom response type, for example to include custom error data. +// Errors are intentionally serialized first based on the advice in https://github.com/facebook/graphql/commit/7b40390d48680b15cb93e02d46ac5eb249689876#diff-757cea6edf0288677a9eea4cfc801d87R107 +type Response struct { + Errors []*errors.QueryError `json:"errors,omitempty"` + Data json.RawMessage `json:"data,omitempty"` + Extensions map[string]interface{} `json:"extensions,omitempty"` +} + +// Validate validates the given query with the schema. +func (s *Schema) Validate(queryString string) []*errors.QueryError { + return s.ValidateWithVariables(queryString, nil) +} + +// ValidateWithVariables validates the given query with the schema and the input variables. +func (s *Schema) ValidateWithVariables(queryString string, variables map[string]interface{}) []*errors.QueryError { + doc, qErr := query.Parse(queryString) + if qErr != nil { + return []*errors.QueryError{qErr} + } + + return validation.Validate(s.schema, doc, variables, s.maxDepth) +} + +// Exec executes the given query with the schema's resolver. It panics if the schema was created +// without a resolver. If the context get cancelled, no further resolvers will be called and a +// the context error will be returned as soon as possible (not immediately). +func (s *Schema) Exec(ctx context.Context, queryString string, operationName string, variables map[string]interface{}) *Response { + if !s.res.Resolver.IsValid() { + panic("schema created without resolver, can not exec") + } + return s.exec(ctx, queryString, operationName, variables, s.res) +} + +func (s *Schema) exec(ctx context.Context, queryString string, operationName string, variables map[string]interface{}, res *resolvable.Schema) *Response { + doc, qErr := query.Parse(queryString) + if qErr != nil { + return &Response{Errors: []*errors.QueryError{qErr}} + } + + validationFinish := s.validationTracer.TraceValidation(ctx) + errs := validation.Validate(s.schema, doc, variables, s.maxDepth) + validationFinish(errs) + if len(errs) != 0 { + return &Response{Errors: errs} + } + + op, err := getOperation(doc, operationName) + if err != nil { + return &Response{Errors: []*errors.QueryError{errors.Errorf("%s", err)}} + } + + // If the optional "operationName" POST parameter is not provided then + // use the query's operation name for improved tracing. + if operationName == "" { + operationName = op.Name.Name + } + + // Subscriptions are not valid in Exec. Use schema.Subscribe() instead. + if op.Type == query.Subscription { + return &Response{Errors: []*errors.QueryError{{Message: "graphql-ws protocol header is missing"}}} + } + if op.Type == query.Mutation { + if _, ok := s.schema.EntryPoints["mutation"]; !ok { + return &Response{Errors: []*errors.QueryError{{Message: "no mutations are offered by the schema"}}} + } + } + + // Fill in variables with the defaults from the operation + if variables == nil { + variables = make(map[string]interface{}, len(op.Vars)) + } + for _, v := range op.Vars { + if _, ok := variables[v.Name.Name]; !ok && v.Default != nil { + variables[v.Name.Name] = v.Default.Deserialize(nil) + } + } + + r := &exec.Request{ + Request: selected.Request{ + Doc: doc, + Vars: variables, + Schema: s.schema, + DisableIntrospection: s.disableIntrospection, + }, + Limiter: make(chan struct{}, s.maxParallelism), + Tracer: s.tracer, + Logger: s.logger, + PanicHandler: s.panicHandler, + } + varTypes := make(map[string]*introspection.Type) + for _, v := range op.Vars { + t, err := common.ResolveType(v.Type, s.schema.Resolve) + if err != nil { + return &Response{Errors: []*errors.QueryError{err}} + } + varTypes[v.Name.Name] = introspection.WrapType(t) + } + traceCtx, finish := s.tracer.TraceQuery(ctx, queryString, operationName, variables, varTypes) + data, errs := r.Execute(traceCtx, res, op) + finish(errs) + + return &Response{ + Data: data, + Errors: errs, + } +} + +func (s *Schema) validateSchema() error { + // https://graphql.github.io/graphql-spec/June2018/#sec-Root-Operation-Types + // > The query root operation type must be provided and must be an Object type. + if err := validateRootOp(s.schema, "query", true); err != nil { + return err + } + // > The mutation root operation type is optional; if it is not provided, the service does not support mutations. + // > If it is provided, it must be an Object type. + if err := validateRootOp(s.schema, "mutation", false); err != nil { + return err + } + // > Similarly, the subscription root operation type is also optional; if it is not provided, the service does not + // > support subscriptions. If it is provided, it must be an Object type. + if err := validateRootOp(s.schema, "subscription", false); err != nil { + return err + } + return nil +} + +type validationBridgingTracer struct { + tracer trace.ValidationTracer //nolint:staticcheck +} + +func (t *validationBridgingTracer) TraceValidation(context.Context) trace.TraceValidationFinishFunc { + return t.tracer.TraceValidation() +} + +func validateRootOp(s *types.Schema, name string, mandatory bool) error { + t, ok := s.EntryPoints[name] + if !ok { + if mandatory { + return fmt.Errorf("root operation %q must be defined", name) + } + return nil + } + if t.Kind() != "OBJECT" { + return fmt.Errorf("root operation %q must be an OBJECT", name) + } + return nil +} + +func getOperation(document *types.ExecutableDefinition, operationName string) (*types.OperationDefinition, error) { + if len(document.Operations) == 0 { + return nil, fmt.Errorf("no operations in query document") + } + + if operationName == "" { + if len(document.Operations) > 1 { + return nil, fmt.Errorf("more than one operation in query document and no operation name given") + } + for _, op := range document.Operations { + return op, nil // return the one and only operation + } + } + + op := document.Operations.Get(operationName) + if op == nil { + return nil, fmt.Errorf("no operation with name %q", operationName) + } + return op, nil +} diff --git a/vendor/github.com/graph-gophers/graphql-go/id.go b/vendor/github.com/graph-gophers/graphql-go/id.go new file mode 100644 index 00000000..80bdac90 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/id.go @@ -0,0 +1,30 @@ +package graphql + +import ( + "fmt" + "strconv" +) + +// ID represents GraphQL's "ID" scalar type. A custom type may be used instead. +type ID string + +func (ID) ImplementsGraphQLType(name string) bool { + return name == "ID" +} + +func (id *ID) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + *id = ID(input) + case int32: + *id = ID(strconv.Itoa(int(input))) + default: + err = fmt.Errorf("wrong type for ID: %T", input) + } + return err +} + +func (id ID) MarshalJSON() ([]byte, error) { + return strconv.AppendQuote(nil, string(id)), nil +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/blockstring.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/blockstring.go new file mode 100644 index 00000000..1f7fe813 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/blockstring.go @@ -0,0 +1,103 @@ +// MIT License +// +// Copyright (c) 2019 GraphQL Contributors +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in all +// copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +// SOFTWARE. +// +// This implementation has been adapted from the graphql-js reference implementation +// https://github.com/graphql/graphql-js/blob/5eb7c4ded7ceb83ac742149cbe0dae07a8af9a30/src/language/blockString.js +// which is released under the MIT License above. + +package common + +import ( + "strings" +) + +// Produces the value of a block string from its parsed raw value, similar to +// CoffeeScript's block string, Python's docstring trim or Ruby's strip_heredoc. +// +// This implements the GraphQL spec's BlockStringValue() static algorithm. +func blockString(raw string) string { + lines := strings.Split(raw, "\n") + + // Remove common indentation from all lines except the first (which has none) + ind := blockStringIndentation(lines) + if ind > 0 { + for i := 1; i < len(lines); i++ { + l := lines[i] + if len(l) < ind { + lines[i] = "" + continue + } + lines[i] = l[ind:] + } + } + + // Remove leading and trailing blank lines + trimStart := 0 + for i := 0; i < len(lines) && isBlank(lines[i]); i++ { + trimStart++ + } + lines = lines[trimStart:] + trimEnd := 0 + for i := len(lines) - 1; i > 0 && isBlank(lines[i]); i-- { + trimEnd++ + } + lines = lines[:len(lines)-trimEnd] + + return strings.Join(lines, "\n") +} + +func blockStringIndentation(lines []string) int { + var commonIndent *int + for i := 1; i < len(lines); i++ { + l := lines[i] + indent := leadingWhitespace(l) + if indent == len(l) { + // don't consider blank/empty lines + continue + } + if indent == 0 { + return 0 + } + if commonIndent == nil || indent < *commonIndent { + commonIndent = &indent + } + } + if commonIndent == nil { + return 0 + } + return *commonIndent +} + +func isBlank(s string) bool { + return len(s) == 0 || leadingWhitespace(s) == len(s) +} + +func leadingWhitespace(s string) int { + i := 0 + for _, r := range s { + if r != '\t' && r != ' ' { + break + } + i++ + } + return i +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/directive.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/directive.go new file mode 100644 index 00000000..f767e28f --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/directive.go @@ -0,0 +1,18 @@ +package common + +import "github.com/graph-gophers/graphql-go/types" + +func ParseDirectives(l *Lexer) types.DirectiveList { + var directives types.DirectiveList + for l.Peek() == '@' { + l.ConsumeToken('@') + d := &types.Directive{} + d.Name = l.ConsumeIdentWithLoc() + d.Name.Loc.Column-- + if l.Peek() == '(' { + d.Arguments = ParseArgumentList(l) + } + directives = append(directives, d) + } + return directives +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/lexer.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/lexer.go new file mode 100644 index 00000000..ff45bcad --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/lexer.go @@ -0,0 +1,229 @@ +package common + +import ( + "bytes" + "fmt" + "strconv" + "strings" + "text/scanner" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/types" +) + +type syntaxError string + +type Lexer struct { + sc *scanner.Scanner + next rune + comment bytes.Buffer + useStringDescriptions bool +} + +type Ident struct { + Name string + Loc errors.Location +} + +func NewLexer(s string, useStringDescriptions bool) *Lexer { + sc := &scanner.Scanner{ + Mode: scanner.ScanIdents | scanner.ScanInts | scanner.ScanFloats | scanner.ScanStrings, + } + sc.Init(strings.NewReader(s)) + + l := Lexer{sc: sc, useStringDescriptions: useStringDescriptions} + l.sc.Error = l.CatchScannerError + + return &l +} + +func (l *Lexer) CatchSyntaxError(f func()) (errRes *errors.QueryError) { + defer func() { + if err := recover(); err != nil { + if err, ok := err.(syntaxError); ok { + errRes = errors.Errorf("syntax error: %s", err) + errRes.Locations = []errors.Location{l.Location()} + return + } + panic(err) + } + }() + + f() + return +} + +func (l *Lexer) Peek() rune { + return l.next +} + +// ConsumeWhitespace consumes whitespace and tokens equivalent to whitespace (e.g. commas and comments). +// +// Consumed comment characters will build the description for the next type or field encountered. +// The description is available from `DescComment()`, and will be reset every time `ConsumeWhitespace()` is +// executed unless l.useStringDescriptions is set. +func (l *Lexer) ConsumeWhitespace() { + l.comment.Reset() + for { + l.next = l.sc.Scan() + + if l.next == ',' { + // Similar to white space and line terminators, commas (',') are used to improve the + // legibility of source text and separate lexical tokens but are otherwise syntactically and + // semantically insignificant within GraphQL documents. + // + // http://facebook.github.io/graphql/draft/#sec-Insignificant-Commas + continue + } + + if l.next == '#' { + // GraphQL source documents may contain single-line comments, starting with the '#' marker. + // + // A comment can contain any Unicode code point except `LineTerminator` so a comment always + // consists of all code points starting with the '#' character up to but not including the + // line terminator. + l.consumeComment() + continue + } + + break + } +} + +// consumeDescription optionally consumes a description based on the June 2018 graphql spec if any are present. +// +// Single quote strings are also single line. Triple quote strings can be multi-line. Triple quote strings +// whitespace trimmed on both ends. +// If a description is found, consume any following comments as well +// +// http://facebook.github.io/graphql/June2018/#sec-Descriptions +func (l *Lexer) consumeDescription() string { + // If the next token is not a string, we don't consume it + if l.next != scanner.String { + return "" + } + // Triple quote string is an empty "string" followed by an open quote due to the way the parser treats strings as one token + var desc string + if l.sc.Peek() == '"' { + desc = l.consumeTripleQuoteComment() + } else { + desc = l.consumeStringComment() + } + l.ConsumeWhitespace() + return desc +} + +func (l *Lexer) ConsumeIdent() string { + name := l.sc.TokenText() + l.ConsumeToken(scanner.Ident) + return name +} + +func (l *Lexer) ConsumeIdentWithLoc() types.Ident { + loc := l.Location() + name := l.sc.TokenText() + l.ConsumeToken(scanner.Ident) + return types.Ident{Name: name, Loc: loc} +} + +func (l *Lexer) ConsumeKeyword(keyword string) { + if l.next != scanner.Ident || l.sc.TokenText() != keyword { + l.SyntaxError(fmt.Sprintf("unexpected %q, expecting %q", l.sc.TokenText(), keyword)) + } + l.ConsumeWhitespace() +} + +func (l *Lexer) ConsumeLiteral() *types.PrimitiveValue { + lit := &types.PrimitiveValue{Type: l.next, Text: l.sc.TokenText()} + l.ConsumeWhitespace() + return lit +} + +func (l *Lexer) ConsumeToken(expected rune) { + if l.next != expected { + l.SyntaxError(fmt.Sprintf("unexpected %q, expecting %s", l.sc.TokenText(), scanner.TokenString(expected))) + } + l.ConsumeWhitespace() +} + +func (l *Lexer) DescComment() string { + comment := l.comment.String() + desc := l.consumeDescription() + if l.useStringDescriptions { + return desc + } + return comment +} + +func (l *Lexer) SyntaxError(message string) { + panic(syntaxError(message)) +} + +func (l *Lexer) Location() errors.Location { + return errors.Location{ + Line: l.sc.Line, + Column: l.sc.Column, + } +} + +func (l *Lexer) consumeTripleQuoteComment() string { + l.next = l.sc.Next() + if l.next != '"' { + panic("consumeTripleQuoteComment used in wrong context: no third quote?") + } + + var buf bytes.Buffer + var numQuotes int + for { + l.next = l.sc.Next() + if l.next == '"' { + numQuotes++ + } else { + numQuotes = 0 + } + buf.WriteRune(l.next) + if numQuotes == 3 || l.next == scanner.EOF { + break + } + } + val := buf.String() + val = val[:len(val)-numQuotes] + return blockString(val) +} + +func (l *Lexer) consumeStringComment() string { + val, err := strconv.Unquote(l.sc.TokenText()) + if err != nil { + panic(err) + } + return val +} + +// consumeComment consumes all characters from `#` to the first encountered line terminator. +// The characters are appended to `l.comment`. +func (l *Lexer) consumeComment() { + if l.next != '#' { + panic("consumeComment used in wrong context") + } + + // TODO: count and trim whitespace so we can dedent any following lines. + if l.sc.Peek() == ' ' { + l.sc.Next() + } + + if l.comment.Len() > 0 { + l.comment.WriteRune('\n') + } + + for { + next := l.sc.Next() + if next == '\r' || next == '\n' || next == scanner.EOF { + break + } + l.comment.WriteRune(next) + } +} + +func (l *Lexer) CatchScannerError(s *scanner.Scanner, msg string) { + l.SyntaxError(msg) +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/literals.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/literals.go new file mode 100644 index 00000000..a6af3c43 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/literals.go @@ -0,0 +1,58 @@ +package common + +import ( + "text/scanner" + + "github.com/graph-gophers/graphql-go/types" +) + +func ParseLiteral(l *Lexer, constOnly bool) types.Value { + loc := l.Location() + switch l.Peek() { + case '$': + if constOnly { + l.SyntaxError("variable not allowed") + panic("unreachable") + } + l.ConsumeToken('$') + return &types.Variable{Name: l.ConsumeIdent(), Loc: loc} + + case scanner.Int, scanner.Float, scanner.String, scanner.Ident: + lit := l.ConsumeLiteral() + if lit.Type == scanner.Ident && lit.Text == "null" { + return &types.NullValue{Loc: loc} + } + lit.Loc = loc + return lit + case '-': + l.ConsumeToken('-') + lit := l.ConsumeLiteral() + lit.Text = "-" + lit.Text + lit.Loc = loc + return lit + case '[': + l.ConsumeToken('[') + var list []types.Value + for l.Peek() != ']' { + list = append(list, ParseLiteral(l, constOnly)) + } + l.ConsumeToken(']') + return &types.ListValue{Values: list, Loc: loc} + + case '{': + l.ConsumeToken('{') + var fields []*types.ObjectField + for l.Peek() != '}' { + name := l.ConsumeIdentWithLoc() + l.ConsumeToken(':') + value := ParseLiteral(l, constOnly) + fields = append(fields, &types.ObjectField{Name: name, Value: value}) + } + l.ConsumeToken('}') + return &types.ObjectValue{Fields: fields, Loc: loc} + + default: + l.SyntaxError("invalid value") + panic("unreachable") + } +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/types.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/types.go new file mode 100644 index 00000000..4a30f46e --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/types.go @@ -0,0 +1,67 @@ +package common + +import ( + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/types" +) + +func ParseType(l *Lexer) types.Type { + t := parseNullType(l) + if l.Peek() == '!' { + l.ConsumeToken('!') + return &types.NonNull{OfType: t} + } + return t +} + +func parseNullType(l *Lexer) types.Type { + if l.Peek() == '[' { + l.ConsumeToken('[') + ofType := ParseType(l) + l.ConsumeToken(']') + return &types.List{OfType: ofType} + } + + return &types.TypeName{Ident: l.ConsumeIdentWithLoc()} +} + +type Resolver func(name string) types.Type + +// ResolveType attempts to resolve a type's name against a resolving function. +// This function is used when one needs to check if a TypeName exists in the resolver (typically a Schema). +// +// In the example below, ResolveType would be used to check if the resolving function +// returns a valid type for Dimension: +// +// type Profile { +// picture(dimensions: Dimension): Url +// } +// +// ResolveType recursively unwraps List and NonNull types until a NamedType is reached. +func ResolveType(t types.Type, resolver Resolver) (types.Type, *errors.QueryError) { + switch t := t.(type) { + case *types.List: + ofType, err := ResolveType(t.OfType, resolver) + if err != nil { + return nil, err + } + return &types.List{OfType: ofType}, nil + case *types.NonNull: + ofType, err := ResolveType(t.OfType, resolver) + if err != nil { + return nil, err + } + return &types.NonNull{OfType: ofType}, nil + case *types.TypeName: + refT := resolver(t.Name) + if refT == nil { + err := errors.Errorf("Unknown type %q.", t.Name) + err.Rule = "KnownTypeNames" + err.Locations = []errors.Location{t.Loc} + return nil, err + } + return refT, nil + default: + return t, nil + } +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/common/values.go b/vendor/github.com/graph-gophers/graphql-go/internal/common/values.go new file mode 100644 index 00000000..2d6e0b54 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/common/values.go @@ -0,0 +1,37 @@ +package common + +import ( + "github.com/graph-gophers/graphql-go/types" +) + +func ParseInputValue(l *Lexer) *types.InputValueDefinition { + p := &types.InputValueDefinition{} + p.Loc = l.Location() + p.Desc = l.DescComment() + p.Name = l.ConsumeIdentWithLoc() + l.ConsumeToken(':') + p.TypeLoc = l.Location() + p.Type = ParseType(l) + if l.Peek() == '=' { + l.ConsumeToken('=') + p.Default = ParseLiteral(l, true) + } + p.Directives = ParseDirectives(l) + return p +} + +func ParseArgumentList(l *Lexer) types.ArgumentList { + var args types.ArgumentList + l.ConsumeToken('(') + for l.Peek() != ')' { + name := l.ConsumeIdentWithLoc() + l.ConsumeToken(':') + value := ParseLiteral(l, false) + args = append(args, &types.Argument{ + Name: name, + Value: value, + }) + } + l.ConsumeToken(')') + return args +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/exec.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/exec.go new file mode 100644 index 00000000..6b478487 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/exec.go @@ -0,0 +1,381 @@ +package exec + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "reflect" + "sync" + "time" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/internal/exec/selected" + "github.com/graph-gophers/graphql-go/internal/query" + "github.com/graph-gophers/graphql-go/log" + "github.com/graph-gophers/graphql-go/trace" + "github.com/graph-gophers/graphql-go/types" +) + +type Request struct { + selected.Request + Limiter chan struct{} + Tracer trace.Tracer + Logger log.Logger + PanicHandler errors.PanicHandler + SubscribeResolverTimeout time.Duration +} + +func (r *Request) handlePanic(ctx context.Context) { + if value := recover(); value != nil { + r.Logger.LogPanic(ctx, value) + r.AddError(r.PanicHandler.MakePanicError(ctx, value)) + } +} + +type extensionser interface { + Extensions() map[string]interface{} +} + +func (r *Request) Execute(ctx context.Context, s *resolvable.Schema, op *types.OperationDefinition) ([]byte, []*errors.QueryError) { + var out bytes.Buffer + func() { + defer r.handlePanic(ctx) + sels := selected.ApplyOperation(&r.Request, s, op) + r.execSelections(ctx, sels, nil, s, s.Resolver, &out, op.Type == query.Mutation) + }() + + if err := ctx.Err(); err != nil { + return nil, []*errors.QueryError{errors.Errorf("%s", err)} + } + + return out.Bytes(), r.Errs +} + +type fieldToExec struct { + field *selected.SchemaField + sels []selected.Selection + resolver reflect.Value + out *bytes.Buffer +} + +func resolvedToNull(b *bytes.Buffer) bool { + return bytes.Equal(b.Bytes(), []byte("null")) +} + +func (r *Request) execSelections(ctx context.Context, sels []selected.Selection, path *pathSegment, s *resolvable.Schema, resolver reflect.Value, out *bytes.Buffer, serially bool) { + async := !serially && selected.HasAsyncSel(sels) + + var fields []*fieldToExec + collectFieldsToResolve(sels, s, resolver, &fields, make(map[string]*fieldToExec)) + + if async { + var wg sync.WaitGroup + wg.Add(len(fields)) + for _, f := range fields { + go func(f *fieldToExec) { + defer wg.Done() + defer r.handlePanic(ctx) + f.out = new(bytes.Buffer) + execFieldSelection(ctx, r, s, f, &pathSegment{path, f.field.Alias}, true) + }(f) + } + wg.Wait() + } else { + for _, f := range fields { + f.out = new(bytes.Buffer) + execFieldSelection(ctx, r, s, f, &pathSegment{path, f.field.Alias}, true) + } + } + + out.WriteByte('{') + for i, f := range fields { + // If a non-nullable child resolved to null, an error was added to the + // "errors" list in the response, so this field resolves to null. + // If this field is non-nullable, the error is propagated to its parent. + if _, ok := f.field.Type.(*types.NonNull); ok && resolvedToNull(f.out) { + out.Reset() + out.Write([]byte("null")) + return + } + + if i > 0 { + out.WriteByte(',') + } + out.WriteByte('"') + out.WriteString(f.field.Alias) + out.WriteByte('"') + out.WriteByte(':') + out.Write(f.out.Bytes()) + } + out.WriteByte('}') +} + +func collectFieldsToResolve(sels []selected.Selection, s *resolvable.Schema, resolver reflect.Value, fields *[]*fieldToExec, fieldByAlias map[string]*fieldToExec) { + for _, sel := range sels { + switch sel := sel.(type) { + case *selected.SchemaField: + field, ok := fieldByAlias[sel.Alias] + if !ok { // validation already checked for conflict (TODO) + field = &fieldToExec{field: sel, resolver: resolver} + fieldByAlias[sel.Alias] = field + *fields = append(*fields, field) + } + field.sels = append(field.sels, sel.Sels...) + + case *selected.TypenameField: + _, ok := fieldByAlias[sel.Alias] + if !ok { + res := reflect.ValueOf(typeOf(sel, resolver)) + f := s.FieldTypename + f.TypeName = res.String() + + sf := &selected.SchemaField{ + Field: f, + Alias: sel.Alias, + FixedResult: res, + } + + field := &fieldToExec{field: sf, resolver: resolver} + *fields = append(*fields, field) + fieldByAlias[sel.Alias] = field + } + + case *selected.TypeAssertion: + out := resolver.Method(sel.MethodIndex).Call(nil) + if !out[1].Bool() { + continue + } + collectFieldsToResolve(sel.Sels, s, out[0], fields, fieldByAlias) + + default: + panic("unreachable") + } + } +} + +func typeOf(tf *selected.TypenameField, resolver reflect.Value) string { + if len(tf.TypeAssertions) == 0 { + return tf.Name + } + for name, a := range tf.TypeAssertions { + out := resolver.Method(a.MethodIndex).Call(nil) + if out[1].Bool() { + return name + } + } + return "" +} + +func execFieldSelection(ctx context.Context, r *Request, s *resolvable.Schema, f *fieldToExec, path *pathSegment, applyLimiter bool) { + if applyLimiter { + r.Limiter <- struct{}{} + } + + var result reflect.Value + var err *errors.QueryError + + traceCtx, finish := r.Tracer.TraceField(ctx, f.field.TraceLabel, f.field.TypeName, f.field.Name, !f.field.Async, f.field.Args) + defer func() { + finish(err) + }() + + err = func() (err *errors.QueryError) { + defer func() { + if panicValue := recover(); panicValue != nil { + r.Logger.LogPanic(ctx, panicValue) + err = r.PanicHandler.MakePanicError(ctx, panicValue) + err.Path = path.toSlice() + } + }() + + if f.field.FixedResult.IsValid() { + result = f.field.FixedResult + return nil + } + + if err := traceCtx.Err(); err != nil { + return errors.Errorf("%s", err) // don't execute any more resolvers if context got cancelled + } + + res := f.resolver + if f.field.UseMethodResolver() { + var in []reflect.Value + if f.field.HasContext { + in = append(in, reflect.ValueOf(traceCtx)) + } + if f.field.ArgsPacker != nil { + in = append(in, f.field.PackedArgs) + } + callOut := res.Method(f.field.MethodIndex).Call(in) + result = callOut[0] + if f.field.HasError && !callOut[1].IsNil() { + resolverErr := callOut[1].Interface().(error) + err := errors.Errorf("%s", resolverErr) + err.Path = path.toSlice() + err.ResolverError = resolverErr + if ex, ok := callOut[1].Interface().(extensionser); ok { + err.Extensions = ex.Extensions() + } + return err + } + } else { + // TODO extract out unwrapping ptr logic to a common place + if res.Kind() == reflect.Ptr { + res = res.Elem() + } + result = res.FieldByIndex(f.field.FieldIndex) + } + return nil + }() + + if applyLimiter { + <-r.Limiter + } + + if err != nil { + // If an error occurred while resolving a field, it should be treated as though the field + // returned null, and an error must be added to the "errors" list in the response. + r.AddError(err) + f.out.WriteString("null") + return + } + + r.execSelectionSet(traceCtx, f.sels, f.field.Type, path, s, result, f.out) +} + +func (r *Request) execSelectionSet(ctx context.Context, sels []selected.Selection, typ types.Type, path *pathSegment, s *resolvable.Schema, resolver reflect.Value, out *bytes.Buffer) { + t, nonNull := unwrapNonNull(typ) + + // a reflect.Value of a nil interface will show up as an Invalid value + if resolver.Kind() == reflect.Invalid || ((resolver.Kind() == reflect.Ptr || resolver.Kind() == reflect.Interface) && resolver.IsNil()) { + // If a field of a non-null type resolves to null (either because the + // function to resolve the field returned null or because an error occurred), + // add an error to the "errors" list in the response. + if nonNull { + err := errors.Errorf("graphql: got nil for non-null %q", t) + err.Path = path.toSlice() + r.AddError(err) + } + out.WriteString("null") + return + } + + switch t.(type) { + case *types.ObjectTypeDefinition, *types.InterfaceTypeDefinition, *types.Union: + r.execSelections(ctx, sels, path, s, resolver, out, false) + return + } + + // Any pointers or interfaces at this point should be non-nil, so we can get the actual value of them + // for serialization + if resolver.Kind() == reflect.Ptr || resolver.Kind() == reflect.Interface { + resolver = resolver.Elem() + } + + switch t := t.(type) { + case *types.List: + r.execList(ctx, sels, t, path, s, resolver, out) + + case *types.ScalarTypeDefinition: + v := resolver.Interface() + data, err := json.Marshal(v) + if err != nil { + panic(errors.Errorf("could not marshal %v: %s", v, err)) + } + out.Write(data) + + case *types.EnumTypeDefinition: + var stringer fmt.Stringer = resolver + if s, ok := resolver.Interface().(fmt.Stringer); ok { + stringer = s + } + name := stringer.String() + var valid bool + for _, v := range t.EnumValuesDefinition { + if v.EnumValue == name { + valid = true + break + } + } + if !valid { + err := errors.Errorf("Invalid value %s.\nExpected type %s, found %s.", name, t.Name, name) + err.Path = path.toSlice() + r.AddError(err) + out.WriteString("null") + return + } + out.WriteByte('"') + out.WriteString(name) + out.WriteByte('"') + + default: + panic("unreachable") + } +} + +func (r *Request) execList(ctx context.Context, sels []selected.Selection, typ *types.List, path *pathSegment, s *resolvable.Schema, resolver reflect.Value, out *bytes.Buffer) { + l := resolver.Len() + entryouts := make([]bytes.Buffer, l) + + if selected.HasAsyncSel(sels) { + // Limit the number of concurrent goroutines spawned as it can lead to large + // memory spikes for large lists. + concurrency := cap(r.Limiter) + sem := make(chan struct{}, concurrency) + for i := 0; i < l; i++ { + sem <- struct{}{} + go func(i int) { + defer func() { <-sem }() + defer r.handlePanic(ctx) + r.execSelectionSet(ctx, sels, typ.OfType, &pathSegment{path, i}, s, resolver.Index(i), &entryouts[i]) + }(i) + } + for i := 0; i < concurrency; i++ { + sem <- struct{}{} + } + } else { + for i := 0; i < l; i++ { + r.execSelectionSet(ctx, sels, typ.OfType, &pathSegment{path, i}, s, resolver.Index(i), &entryouts[i]) + } + } + + _, listOfNonNull := typ.OfType.(*types.NonNull) + + out.WriteByte('[') + for i, entryout := range entryouts { + // If the list wraps a non-null type and one of the list elements + // resolves to null, then the entire list resolves to null. + if listOfNonNull && resolvedToNull(&entryout) { + out.Reset() + out.WriteString("null") + return + } + + if i > 0 { + out.WriteByte(',') + } + out.Write(entryout.Bytes()) + } + out.WriteByte(']') +} + +func unwrapNonNull(t types.Type) (types.Type, bool) { + if nn, ok := t.(*types.NonNull); ok { + return nn.OfType, true + } + return t, false +} + +type pathSegment struct { + parent *pathSegment + value interface{} +} + +func (p *pathSegment) toSlice() []interface{} { + if p == nil { + return nil + } + return append(p.parent.toSlice(), p.value) +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/packer/packer.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/packer/packer.go new file mode 100644 index 00000000..c0bb7dc9 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/packer/packer.go @@ -0,0 +1,390 @@ +package packer + +import ( + "fmt" + "math" + "reflect" + "strings" + + "github.com/graph-gophers/graphql-go/decode" + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/types" +) + +type packer interface { + Pack(value interface{}) (reflect.Value, error) +} + +type Builder struct { + packerMap map[typePair]*packerMapEntry + structPackers []*StructPacker +} + +type typePair struct { + graphQLType types.Type + resolverType reflect.Type +} + +type packerMapEntry struct { + packer packer + targets []*packer +} + +func NewBuilder() *Builder { + return &Builder{ + packerMap: make(map[typePair]*packerMapEntry), + } +} + +func (b *Builder) Finish() error { + for _, entry := range b.packerMap { + for _, target := range entry.targets { + *target = entry.packer + } + } + + for _, p := range b.structPackers { + p.defaultStruct = reflect.New(p.structType).Elem() + for _, f := range p.fields { + if defaultVal := f.field.Default; defaultVal != nil { + v, err := f.fieldPacker.Pack(defaultVal.Deserialize(nil)) + if err != nil { + return err + } + p.defaultStruct.FieldByIndex(f.fieldIndex).Set(v) + } + } + } + + return nil +} + +func (b *Builder) assignPacker(target *packer, schemaType types.Type, reflectType reflect.Type) error { + k := typePair{schemaType, reflectType} + ref, ok := b.packerMap[k] + if !ok { + ref = &packerMapEntry{} + b.packerMap[k] = ref + var err error + ref.packer, err = b.makePacker(schemaType, reflectType) + if err != nil { + return err + } + } + ref.targets = append(ref.targets, target) + return nil +} + +func (b *Builder) makePacker(schemaType types.Type, reflectType reflect.Type) (packer, error) { + t, nonNull := unwrapNonNull(schemaType) + if !nonNull { + if reflectType.Kind() == reflect.Ptr { + elemType := reflectType.Elem() + addPtr := true + if _, ok := t.(*types.InputObject); ok { + elemType = reflectType // keep pointer for input objects + addPtr = false + } + elem, err := b.makeNonNullPacker(t, elemType) + if err != nil { + return nil, err + } + return &nullPacker{ + elemPacker: elem, + valueType: reflectType, + addPtr: addPtr, + }, nil + } else if isNullable(reflectType) { + elemType := reflectType + addPtr := false + elem, err := b.makeNonNullPacker(t, elemType) + if err != nil { + return nil, err + } + return &nullPacker{ + elemPacker: elem, + valueType: reflectType, + addPtr: addPtr, + }, nil + } else { + return nil, fmt.Errorf("%s is not a pointer or a nullable type", reflectType) + } + } + + return b.makeNonNullPacker(t, reflectType) +} + +func (b *Builder) makeNonNullPacker(schemaType types.Type, reflectType reflect.Type) (packer, error) { + if u, ok := reflect.New(reflectType).Interface().(decode.Unmarshaler); ok { + if !u.ImplementsGraphQLType(schemaType.String()) { + return nil, fmt.Errorf("can not unmarshal %s into %s", schemaType, reflectType) + } + return &unmarshalerPacker{ + ValueType: reflectType, + }, nil + } + + switch t := schemaType.(type) { + case *types.ScalarTypeDefinition: + return &ValuePacker{ + ValueType: reflectType, + }, nil + + case *types.EnumTypeDefinition: + if reflectType.Kind() != reflect.String { + return nil, fmt.Errorf("wrong type, expected %s", reflect.String) + } + return &ValuePacker{ + ValueType: reflectType, + }, nil + + case *types.InputObject: + e, err := b.MakeStructPacker(t.Values, reflectType) + if err != nil { + return nil, err + } + return e, nil + + case *types.List: + if reflectType.Kind() != reflect.Slice { + return nil, fmt.Errorf("expected slice, got %s", reflectType) + } + p := &listPacker{ + sliceType: reflectType, + } + if err := b.assignPacker(&p.elem, t.OfType, reflectType.Elem()); err != nil { + return nil, err + } + return p, nil + + case *types.ObjectTypeDefinition, *types.InterfaceTypeDefinition, *types.Union: + return nil, fmt.Errorf("type of kind %s can not be used as input", t.Kind()) + + default: + panic("unreachable") + } +} + +func (b *Builder) MakeStructPacker(values []*types.InputValueDefinition, typ reflect.Type) (*StructPacker, error) { + structType := typ + usePtr := false + if typ.Kind() == reflect.Ptr { + structType = typ.Elem() + usePtr = true + } + if structType.Kind() != reflect.Struct { + return nil, fmt.Errorf("expected struct or pointer to struct, got %s (hint: missing `args struct { ... }` wrapper for field arguments?)", typ) + } + + var fields []*structPackerField + for _, v := range values { + fe := &structPackerField{field: v} + fx := func(n string) bool { + return strings.EqualFold(stripUnderscore(n), stripUnderscore(v.Name.Name)) + } + + sf, ok := structType.FieldByNameFunc(fx) + if !ok { + return nil, fmt.Errorf("%s does not define field %q (hint: missing `args struct { ... }` wrapper for field arguments, or missing field on input struct)", typ, v.Name.Name) + } + if sf.PkgPath != "" { + return nil, fmt.Errorf("field %q must be exported", sf.Name) + } + fe.fieldIndex = sf.Index + + ft := v.Type + if v.Default != nil { + ft, _ = unwrapNonNull(ft) + ft = &types.NonNull{OfType: ft} + } + + if err := b.assignPacker(&fe.fieldPacker, ft, sf.Type); err != nil { + return nil, fmt.Errorf("field %q: %s", sf.Name, err) + } + + fields = append(fields, fe) + } + + p := &StructPacker{ + structType: structType, + usePtr: usePtr, + fields: fields, + } + b.structPackers = append(b.structPackers, p) + return p, nil +} + +type StructPacker struct { + structType reflect.Type + usePtr bool + defaultStruct reflect.Value + fields []*structPackerField +} + +type structPackerField struct { + field *types.InputValueDefinition + fieldIndex []int + fieldPacker packer +} + +func (p *StructPacker) Pack(value interface{}) (reflect.Value, error) { + if value == nil { + return reflect.Value{}, errors.Errorf("got null for non-null") + } + + values := value.(map[string]interface{}) + v := reflect.New(p.structType) + v.Elem().Set(p.defaultStruct) + for _, f := range p.fields { + if value, ok := values[f.field.Name.Name]; ok { + packed, err := f.fieldPacker.Pack(value) + if err != nil { + return reflect.Value{}, err + } + v.Elem().FieldByIndex(f.fieldIndex).Set(packed) + } + } + if !p.usePtr { + return v.Elem(), nil + } + return v, nil +} + +type listPacker struct { + sliceType reflect.Type + elem packer +} + +func (e *listPacker) Pack(value interface{}) (reflect.Value, error) { + list, ok := value.([]interface{}) + if !ok { + list = []interface{}{value} + } + + v := reflect.MakeSlice(e.sliceType, len(list), len(list)) + for i := range list { + packed, err := e.elem.Pack(list[i]) + if err != nil { + return reflect.Value{}, err + } + v.Index(i).Set(packed) + } + return v, nil +} + +type nullPacker struct { + elemPacker packer + valueType reflect.Type + addPtr bool +} + +func (p *nullPacker) Pack(value interface{}) (reflect.Value, error) { + if value == nil && !isNullable(p.valueType) { + return reflect.Zero(p.valueType), nil + } + + v, err := p.elemPacker.Pack(value) + if err != nil { + return reflect.Value{}, err + } + + if p.addPtr { + ptr := reflect.New(p.valueType.Elem()) + ptr.Elem().Set(v) + return ptr, nil + } + + return v, nil +} + +type ValuePacker struct { + ValueType reflect.Type +} + +func (p *ValuePacker) Pack(value interface{}) (reflect.Value, error) { + if value == nil { + return reflect.Value{}, errors.Errorf("got null for non-null") + } + + coerced, err := unmarshalInput(p.ValueType, value) + if err != nil { + return reflect.Value{}, fmt.Errorf("could not unmarshal %#v (%T) into %s: %s", value, value, p.ValueType, err) + } + return reflect.ValueOf(coerced), nil +} + +type unmarshalerPacker struct { + ValueType reflect.Type +} + +func (p *unmarshalerPacker) Pack(value interface{}) (reflect.Value, error) { + if value == nil && !isNullable(p.ValueType) { + return reflect.Value{}, errors.Errorf("got null for non-null") + } + + v := reflect.New(p.ValueType) + if err := v.Interface().(decode.Unmarshaler).UnmarshalGraphQL(value); err != nil { + return reflect.Value{}, err + } + return v.Elem(), nil +} + +func unmarshalInput(typ reflect.Type, input interface{}) (interface{}, error) { + if reflect.TypeOf(input) == typ { + return input, nil + } + + switch typ.Kind() { + case reflect.Int32: + switch input := input.(type) { + case int: + if input < math.MinInt32 || input > math.MaxInt32 { + return nil, fmt.Errorf("not a 32-bit integer") + } + return int32(input), nil + case float64: + coerced := int32(input) + if input < math.MinInt32 || input > math.MaxInt32 || float64(coerced) != input { + return nil, fmt.Errorf("not a 32-bit integer") + } + return coerced, nil + } + + case reflect.Float64: + switch input := input.(type) { + case int32: + return float64(input), nil + case int: + return float64(input), nil + } + + case reflect.String: + if reflect.TypeOf(input).ConvertibleTo(typ) { + return reflect.ValueOf(input).Convert(typ).Interface(), nil + } + } + + return nil, fmt.Errorf("incompatible type") +} + +func unwrapNonNull(t types.Type) (types.Type, bool) { + if nn, ok := t.(*types.NonNull); ok { + return nn.OfType, true + } + return t, false +} + +func stripUnderscore(s string) string { + return strings.Replace(s, "_", "", -1) +} + +// NullUnmarshaller is an unmarshaller that can handle a nil input +type NullUnmarshaller interface { + decode.Unmarshaler + Nullable() +} + +func isNullable(t reflect.Type) bool { + _, ok := reflect.New(t).Interface().(NullUnmarshaller) + return ok +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/meta.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/meta.go new file mode 100644 index 00000000..02d5e262 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/meta.go @@ -0,0 +1,70 @@ +package resolvable + +import ( + "reflect" + + "github.com/graph-gophers/graphql-go/introspection" + "github.com/graph-gophers/graphql-go/types" +) + +// Meta defines the details of the metadata schema for introspection. +type Meta struct { + FieldSchema Field + FieldType Field + FieldTypename Field + Schema *Object + Type *Object +} + +func newMeta(s *types.Schema) *Meta { + var err error + b := newBuilder(s) + + metaSchema := s.Types["__Schema"].(*types.ObjectTypeDefinition) + so, err := b.makeObjectExec(metaSchema.Name, metaSchema.Fields, nil, false, reflect.TypeOf(&introspection.Schema{})) + if err != nil { + panic(err) + } + + metaType := s.Types["__Type"].(*types.ObjectTypeDefinition) + t, err := b.makeObjectExec(metaType.Name, metaType.Fields, nil, false, reflect.TypeOf(&introspection.Type{})) + if err != nil { + panic(err) + } + + if err := b.finish(); err != nil { + panic(err) + } + + fieldTypename := Field{ + FieldDefinition: types.FieldDefinition{ + Name: "__typename", + Type: &types.NonNull{OfType: s.Types["String"]}, + }, + TraceLabel: "GraphQL field: __typename", + } + + fieldSchema := Field{ + FieldDefinition: types.FieldDefinition{ + Name: "__schema", + Type: s.Types["__Schema"], + }, + TraceLabel: "GraphQL field: __schema", + } + + fieldType := Field{ + FieldDefinition: types.FieldDefinition{ + Name: "__type", + Type: s.Types["__Type"], + }, + TraceLabel: "GraphQL field: __type", + } + + return &Meta{ + FieldSchema: fieldSchema, + FieldTypename: fieldTypename, + FieldType: fieldType, + Schema: so, + Type: t, + } +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/resolvable.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/resolvable.go new file mode 100644 index 00000000..3410f557 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/resolvable.go @@ -0,0 +1,453 @@ +package resolvable + +import ( + "context" + "fmt" + "reflect" + "strings" + + "github.com/graph-gophers/graphql-go/decode" + "github.com/graph-gophers/graphql-go/internal/exec/packer" + "github.com/graph-gophers/graphql-go/types" +) + +type Schema struct { + *Meta + types.Schema + Query Resolvable + Mutation Resolvable + Subscription Resolvable + Resolver reflect.Value +} + +type Resolvable interface { + isResolvable() +} + +type Object struct { + Name string + Fields map[string]*Field + TypeAssertions map[string]*TypeAssertion +} + +type Field struct { + types.FieldDefinition + TypeName string + MethodIndex int + FieldIndex []int + HasContext bool + HasError bool + ArgsPacker *packer.StructPacker + ValueExec Resolvable + TraceLabel string +} + +func (f *Field) UseMethodResolver() bool { + return len(f.FieldIndex) == 0 +} + +type TypeAssertion struct { + MethodIndex int + TypeExec Resolvable +} + +type List struct { + Elem Resolvable +} + +type Scalar struct{} + +func (*Object) isResolvable() {} +func (*List) isResolvable() {} +func (*Scalar) isResolvable() {} + +func ApplyResolver(s *types.Schema, resolver interface{}) (*Schema, error) { + if resolver == nil { + return &Schema{Meta: newMeta(s), Schema: *s}, nil + } + + b := newBuilder(s) + + var query, mutation, subscription Resolvable + + if t, ok := s.EntryPoints["query"]; ok { + if err := b.assignExec(&query, t, reflect.TypeOf(resolver)); err != nil { + return nil, err + } + } + + if t, ok := s.EntryPoints["mutation"]; ok { + if err := b.assignExec(&mutation, t, reflect.TypeOf(resolver)); err != nil { + return nil, err + } + } + + if t, ok := s.EntryPoints["subscription"]; ok { + if err := b.assignExec(&subscription, t, reflect.TypeOf(resolver)); err != nil { + return nil, err + } + } + + if err := b.finish(); err != nil { + return nil, err + } + + return &Schema{ + Meta: newMeta(s), + Schema: *s, + Resolver: reflect.ValueOf(resolver), + Query: query, + Mutation: mutation, + Subscription: subscription, + }, nil +} + +type execBuilder struct { + schema *types.Schema + resMap map[typePair]*resMapEntry + packerBuilder *packer.Builder +} + +type typePair struct { + graphQLType types.Type + resolverType reflect.Type +} + +type resMapEntry struct { + exec Resolvable + targets []*Resolvable +} + +func newBuilder(s *types.Schema) *execBuilder { + return &execBuilder{ + schema: s, + resMap: make(map[typePair]*resMapEntry), + packerBuilder: packer.NewBuilder(), + } +} + +func (b *execBuilder) finish() error { + for _, entry := range b.resMap { + for _, target := range entry.targets { + *target = entry.exec + } + } + + return b.packerBuilder.Finish() +} + +func (b *execBuilder) assignExec(target *Resolvable, t types.Type, resolverType reflect.Type) error { + k := typePair{t, resolverType} + ref, ok := b.resMap[k] + if !ok { + ref = &resMapEntry{} + b.resMap[k] = ref + var err error + ref.exec, err = b.makeExec(t, resolverType) + if err != nil { + return err + } + } + ref.targets = append(ref.targets, target) + return nil +} + +func (b *execBuilder) makeExec(t types.Type, resolverType reflect.Type) (Resolvable, error) { + var nonNull bool + t, nonNull = unwrapNonNull(t) + + switch t := t.(type) { + case *types.ObjectTypeDefinition: + return b.makeObjectExec(t.Name, t.Fields, nil, nonNull, resolverType) + + case *types.InterfaceTypeDefinition: + return b.makeObjectExec(t.Name, t.Fields, t.PossibleTypes, nonNull, resolverType) + + case *types.Union: + return b.makeObjectExec(t.Name, nil, t.UnionMemberTypes, nonNull, resolverType) + } + + if !nonNull { + if resolverType.Kind() != reflect.Ptr { + return nil, fmt.Errorf("%s is not a pointer", resolverType) + } + resolverType = resolverType.Elem() + } + + switch t := t.(type) { + case *types.ScalarTypeDefinition: + return makeScalarExec(t, resolverType) + + case *types.EnumTypeDefinition: + return &Scalar{}, nil + + case *types.List: + if resolverType.Kind() != reflect.Slice { + return nil, fmt.Errorf("%s is not a slice", resolverType) + } + e := &List{} + if err := b.assignExec(&e.Elem, t.OfType, resolverType.Elem()); err != nil { + return nil, err + } + return e, nil + + default: + panic("invalid type: " + t.String()) + } +} + +func makeScalarExec(t *types.ScalarTypeDefinition, resolverType reflect.Type) (Resolvable, error) { + implementsType := false + switch r := reflect.New(resolverType).Interface().(type) { + case *int32: + implementsType = t.Name == "Int" + case *float64: + implementsType = t.Name == "Float" + case *string: + implementsType = t.Name == "String" + case *bool: + implementsType = t.Name == "Boolean" + case decode.Unmarshaler: + implementsType = r.ImplementsGraphQLType(t.Name) + } + + if !implementsType { + return nil, fmt.Errorf("can not use %s as %s", resolverType, t.Name) + } + return &Scalar{}, nil +} + +func (b *execBuilder) makeObjectExec(typeName string, fields types.FieldsDefinition, possibleTypes []*types.ObjectTypeDefinition, + nonNull bool, resolverType reflect.Type) (*Object, error) { + if !nonNull { + if resolverType.Kind() != reflect.Ptr && resolverType.Kind() != reflect.Interface { + return nil, fmt.Errorf("%s is not a pointer or interface", resolverType) + } + } + + methodHasReceiver := resolverType.Kind() != reflect.Interface + + Fields := make(map[string]*Field) + rt := unwrapPtr(resolverType) + fieldsCount := fieldCount(rt, map[string]int{}) + for _, f := range fields { + var fieldIndex []int + methodIndex := findMethod(resolverType, f.Name) + if b.schema.UseFieldResolvers && methodIndex == -1 { + if fieldsCount[strings.ToLower(stripUnderscore(f.Name))] > 1 { + return nil, fmt.Errorf("%s does not resolve %q: ambiguous field %q", resolverType, typeName, f.Name) + } + fieldIndex = findField(rt, f.Name, []int{}) + } + if methodIndex == -1 && len(fieldIndex) == 0 { + hint := "" + if findMethod(reflect.PtrTo(resolverType), f.Name) != -1 { + hint = " (hint: the method exists on the pointer type)" + } + return nil, fmt.Errorf("%s does not resolve %q: missing method for field %q%s", resolverType, typeName, f.Name, hint) + } + + var m reflect.Method + var sf reflect.StructField + if methodIndex != -1 { + m = resolverType.Method(methodIndex) + } else { + sf = rt.FieldByIndex(fieldIndex) + } + fe, err := b.makeFieldExec(typeName, f, m, sf, methodIndex, fieldIndex, methodHasReceiver) + if err != nil { + var resolverName string + if methodIndex != -1 { + resolverName = m.Name + } else { + resolverName = sf.Name + } + return nil, fmt.Errorf("%s\n\tused by (%s).%s", err, resolverType, resolverName) + } + Fields[f.Name] = fe + } + + // Check type assertions when + // 1) using method resolvers + // 2) Or resolver is not an interface type + typeAssertions := make(map[string]*TypeAssertion) + if !b.schema.UseFieldResolvers || resolverType.Kind() != reflect.Interface { + for _, impl := range possibleTypes { + methodIndex := findMethod(resolverType, "To"+impl.Name) + if methodIndex == -1 { + return nil, fmt.Errorf("%s does not resolve %q: missing method %q to convert to %q", resolverType, typeName, "To"+impl.Name, impl.Name) + } + if resolverType.Method(methodIndex).Type.NumOut() != 2 { + return nil, fmt.Errorf("%s does not resolve %q: method %q should return a value and a bool indicating success", resolverType, typeName, "To"+impl.Name) + } + a := &TypeAssertion{ + MethodIndex: methodIndex, + } + if err := b.assignExec(&a.TypeExec, impl, resolverType.Method(methodIndex).Type.Out(0)); err != nil { + return nil, err + } + typeAssertions[impl.Name] = a + } + } + + return &Object{ + Name: typeName, + Fields: Fields, + TypeAssertions: typeAssertions, + }, nil +} + +var contextType = reflect.TypeOf((*context.Context)(nil)).Elem() +var errorType = reflect.TypeOf((*error)(nil)).Elem() + +func (b *execBuilder) makeFieldExec(typeName string, f *types.FieldDefinition, m reflect.Method, sf reflect.StructField, + methodIndex int, fieldIndex []int, methodHasReceiver bool) (*Field, error) { + + var argsPacker *packer.StructPacker + var hasError bool + var hasContext bool + + // Validate resolver method only when there is one + if methodIndex != -1 { + in := make([]reflect.Type, m.Type.NumIn()) + for i := range in { + in[i] = m.Type.In(i) + } + if methodHasReceiver { + in = in[1:] // first parameter is receiver + } + + hasContext = len(in) > 0 && in[0] == contextType + if hasContext { + in = in[1:] + } + + if len(f.Arguments) > 0 { + if len(in) == 0 { + return nil, fmt.Errorf("must have parameter for field arguments") + } + var err error + argsPacker, err = b.packerBuilder.MakeStructPacker(f.Arguments, in[0]) + if err != nil { + return nil, err + } + in = in[1:] + } + + if len(in) > 0 { + return nil, fmt.Errorf("too many parameters") + } + + maxNumOfReturns := 2 + if m.Type.NumOut() < maxNumOfReturns-1 { + return nil, fmt.Errorf("too few return values") + } + + if m.Type.NumOut() > maxNumOfReturns { + return nil, fmt.Errorf("too many return values") + } + + hasError = m.Type.NumOut() == maxNumOfReturns + if hasError { + if m.Type.Out(maxNumOfReturns-1) != errorType { + return nil, fmt.Errorf(`must have "error" as its last return value`) + } + } + } + + fe := &Field{ + FieldDefinition: *f, + TypeName: typeName, + MethodIndex: methodIndex, + FieldIndex: fieldIndex, + HasContext: hasContext, + ArgsPacker: argsPacker, + HasError: hasError, + TraceLabel: fmt.Sprintf("GraphQL field: %s.%s", typeName, f.Name), + } + + var out reflect.Type + if methodIndex != -1 { + out = m.Type.Out(0) + sub, ok := b.schema.EntryPoints["subscription"] + if ok && typeName == sub.TypeName() && out.Kind() == reflect.Chan { + out = m.Type.Out(0).Elem() + } + } else { + out = sf.Type + } + if err := b.assignExec(&fe.ValueExec, f.Type, out); err != nil { + return nil, err + } + + return fe, nil +} + +func findMethod(t reflect.Type, name string) int { + for i := 0; i < t.NumMethod(); i++ { + if strings.EqualFold(stripUnderscore(name), stripUnderscore(t.Method(i).Name)) { + return i + } + } + return -1 +} + +func findField(t reflect.Type, name string, index []int) []int { + for i := 0; i < t.NumField(); i++ { + field := t.Field(i) + + if field.Type.Kind() == reflect.Struct && field.Anonymous { + newIndex := findField(field.Type, name, []int{i}) + if len(newIndex) > 1 { + return append(index, newIndex...) + } + } + + if strings.EqualFold(stripUnderscore(name), stripUnderscore(field.Name)) { + return append(index, i) + } + } + + return index +} + +// fieldCount helps resolve ambiguity when more than one embedded struct contains fields with the same name. +func fieldCount(t reflect.Type, count map[string]int) map[string]int { + if t.Kind() != reflect.Struct { + return nil + } + + for i := 0; i < t.NumField(); i++ { + field := t.Field(i) + fieldName := strings.ToLower(stripUnderscore(field.Name)) + + if field.Type.Kind() == reflect.Struct && field.Anonymous { + count = fieldCount(field.Type, count) + } else { + if _, ok := count[fieldName]; !ok { + count[fieldName] = 0 + } + count[fieldName]++ + } + } + + return count +} + +func unwrapNonNull(t types.Type) (types.Type, bool) { + if nn, ok := t.(*types.NonNull); ok { + return nn.OfType, true + } + return t, false +} + +func stripUnderscore(s string) string { + return strings.Replace(s, "_", "", -1) +} + +func unwrapPtr(t reflect.Type) reflect.Type { + if t.Kind() == reflect.Ptr { + return t.Elem() + } + return t +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/selected/selected.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/selected/selected.go new file mode 100644 index 00000000..9b96d2b6 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/selected/selected.go @@ -0,0 +1,269 @@ +package selected + +import ( + "fmt" + "reflect" + "sync" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/exec/packer" + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/internal/query" + "github.com/graph-gophers/graphql-go/introspection" + "github.com/graph-gophers/graphql-go/types" +) + +type Request struct { + Schema *types.Schema + Doc *types.ExecutableDefinition + Vars map[string]interface{} + Mu sync.Mutex + Errs []*errors.QueryError + DisableIntrospection bool +} + +func (r *Request) AddError(err *errors.QueryError) { + r.Mu.Lock() + r.Errs = append(r.Errs, err) + r.Mu.Unlock() +} + +func ApplyOperation(r *Request, s *resolvable.Schema, op *types.OperationDefinition) []Selection { + var obj *resolvable.Object + switch op.Type { + case query.Query: + obj = s.Query.(*resolvable.Object) + case query.Mutation: + obj = s.Mutation.(*resolvable.Object) + case query.Subscription: + obj = s.Subscription.(*resolvable.Object) + } + return applySelectionSet(r, s, obj, op.Selections) +} + +type Selection interface { + isSelection() +} + +type SchemaField struct { + resolvable.Field + Alias string + Args map[string]interface{} + PackedArgs reflect.Value + Sels []Selection + Async bool + FixedResult reflect.Value +} + +type TypeAssertion struct { + resolvable.TypeAssertion + Sels []Selection +} + +type TypenameField struct { + resolvable.Object + Alias string +} + +func (*SchemaField) isSelection() {} +func (*TypeAssertion) isSelection() {} +func (*TypenameField) isSelection() {} + +func applySelectionSet(r *Request, s *resolvable.Schema, e *resolvable.Object, sels []types.Selection) (flattenedSels []Selection) { + for _, sel := range sels { + switch sel := sel.(type) { + case *types.Field: + field := sel + if skipByDirective(r, field.Directives) { + continue + } + + switch field.Name.Name { + case "__typename": + // __typename is available even though r.DisableIntrospection == true + // because it is necessary when using union types and interfaces: https://graphql.org/learn/schema/#union-types + flattenedSels = append(flattenedSels, &TypenameField{ + Object: *e, + Alias: field.Alias.Name, + }) + + case "__schema": + if !r.DisableIntrospection { + flattenedSels = append(flattenedSels, &SchemaField{ + Field: s.Meta.FieldSchema, + Alias: field.Alias.Name, + Sels: applySelectionSet(r, s, s.Meta.Schema, field.SelectionSet), + Async: true, + FixedResult: reflect.ValueOf(introspection.WrapSchema(r.Schema)), + }) + } + + case "__type": + if !r.DisableIntrospection { + p := packer.ValuePacker{ValueType: reflect.TypeOf("")} + v, err := p.Pack(field.Arguments.MustGet("name").Deserialize(r.Vars)) + if err != nil { + r.AddError(errors.Errorf("%s", err)) + return nil + } + + t, ok := r.Schema.Types[v.String()] + if !ok { + return nil + } + + flattenedSels = append(flattenedSels, &SchemaField{ + Field: s.Meta.FieldType, + Alias: field.Alias.Name, + Sels: applySelectionSet(r, s, s.Meta.Type, field.SelectionSet), + Async: true, + FixedResult: reflect.ValueOf(introspection.WrapType(t)), + }) + } + + default: + fe := e.Fields[field.Name.Name] + + var args map[string]interface{} + var packedArgs reflect.Value + if fe.ArgsPacker != nil { + args = make(map[string]interface{}) + for _, arg := range field.Arguments { + args[arg.Name.Name] = arg.Value.Deserialize(r.Vars) + } + var err error + packedArgs, err = fe.ArgsPacker.Pack(args) + if err != nil { + r.AddError(errors.Errorf("%s", err)) + return + } + } + + fieldSels := applyField(r, s, fe.ValueExec, field.SelectionSet) + flattenedSels = append(flattenedSels, &SchemaField{ + Field: *fe, + Alias: field.Alias.Name, + Args: args, + PackedArgs: packedArgs, + Sels: fieldSels, + Async: fe.HasContext || fe.ArgsPacker != nil || fe.HasError || HasAsyncSel(fieldSels), + }) + } + + case *types.InlineFragment: + frag := sel + if skipByDirective(r, frag.Directives) { + continue + } + flattenedSels = append(flattenedSels, applyFragment(r, s, e, &frag.Fragment)...) + + case *types.FragmentSpread: + spread := sel + if skipByDirective(r, spread.Directives) { + continue + } + flattenedSels = append(flattenedSels, applyFragment(r, s, e, &r.Doc.Fragments.Get(spread.Name.Name).Fragment)...) + + default: + panic("invalid type") + } + } + return +} + +func applyFragment(r *Request, s *resolvable.Schema, e *resolvable.Object, frag *types.Fragment) []Selection { + if frag.On.Name != e.Name { + t := r.Schema.Resolve(frag.On.Name) + face, ok := t.(*types.InterfaceTypeDefinition) + if !ok && frag.On.Name != "" { + a, ok2 := e.TypeAssertions[frag.On.Name] + if !ok2 { + panic(fmt.Errorf("%q does not implement %q", frag.On, e.Name)) // TODO proper error handling + } + + return []Selection{&TypeAssertion{ + TypeAssertion: *a, + Sels: applySelectionSet(r, s, a.TypeExec.(*resolvable.Object), frag.Selections), + }} + } + if ok && len(face.PossibleTypes) > 0 { + sels := []Selection{} + for _, t := range face.PossibleTypes { + if t.Name == e.Name { + return applySelectionSet(r, s, e, frag.Selections) + } + + if a, ok := e.TypeAssertions[t.Name]; ok { + sels = append(sels, &TypeAssertion{ + TypeAssertion: *a, + Sels: applySelectionSet(r, s, a.TypeExec.(*resolvable.Object), frag.Selections), + }) + } + } + if len(sels) == 0 { + panic(fmt.Errorf("%q does not implement %q", e.Name, frag.On)) // TODO proper error handling + } + return sels + } + } + return applySelectionSet(r, s, e, frag.Selections) +} + +func applyField(r *Request, s *resolvable.Schema, e resolvable.Resolvable, sels []types.Selection) []Selection { + switch e := e.(type) { + case *resolvable.Object: + return applySelectionSet(r, s, e, sels) + case *resolvable.List: + return applyField(r, s, e.Elem, sels) + case *resolvable.Scalar: + return nil + default: + panic("unreachable") + } +} + +func skipByDirective(r *Request, directives types.DirectiveList) bool { + if d := directives.Get("skip"); d != nil { + p := packer.ValuePacker{ValueType: reflect.TypeOf(false)} + v, err := p.Pack(d.Arguments.MustGet("if").Deserialize(r.Vars)) + if err != nil { + r.AddError(errors.Errorf("%s", err)) + } + if err == nil && v.Bool() { + return true + } + } + + if d := directives.Get("include"); d != nil { + p := packer.ValuePacker{ValueType: reflect.TypeOf(false)} + v, err := p.Pack(d.Arguments.MustGet("if").Deserialize(r.Vars)) + if err != nil { + r.AddError(errors.Errorf("%s", err)) + } + if err == nil && !v.Bool() { + return true + } + } + + return false +} + +func HasAsyncSel(sels []Selection) bool { + for _, sel := range sels { + switch sel := sel.(type) { + case *SchemaField: + if sel.Async { + return true + } + case *TypeAssertion: + if HasAsyncSel(sel.Sels) { + return true + } + case *TypenameField: + // sync + default: + panic("unreachable") + } + } + return false +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/exec/subscribe.go b/vendor/github.com/graph-gophers/graphql-go/internal/exec/subscribe.go new file mode 100644 index 00000000..37ebacbc --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/exec/subscribe.go @@ -0,0 +1,179 @@ +package exec + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "reflect" + "time" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/internal/exec/selected" + "github.com/graph-gophers/graphql-go/types" +) + +type Response struct { + Data json.RawMessage + Errors []*errors.QueryError +} + +func (r *Request) Subscribe(ctx context.Context, s *resolvable.Schema, op *types.OperationDefinition) <-chan *Response { + var result reflect.Value + var f *fieldToExec + var err *errors.QueryError + func() { + defer r.handlePanic(ctx) + + sels := selected.ApplyOperation(&r.Request, s, op) + var fields []*fieldToExec + collectFieldsToResolve(sels, s, s.Resolver, &fields, make(map[string]*fieldToExec)) + + // TODO: move this check into validation.Validate + if len(fields) != 1 { + err = errors.Errorf("%s", "can subscribe to at most one subscription at a time") + return + } + f = fields[0] + + var in []reflect.Value + if f.field.HasContext { + in = append(in, reflect.ValueOf(ctx)) + } + if f.field.ArgsPacker != nil { + in = append(in, f.field.PackedArgs) + } + callOut := f.resolver.Method(f.field.MethodIndex).Call(in) + result = callOut[0] + + if f.field.HasError && !callOut[1].IsNil() { + switch resolverErr := callOut[1].Interface().(type) { + case *errors.QueryError: + err = resolverErr + case error: + err = errors.Errorf("%s", resolverErr) + err.ResolverError = resolverErr + default: + panic(fmt.Errorf("can only deal with *QueryError and error types, got %T", resolverErr)) + } + } + }() + + // Handles the case where the locally executed func above panicked + if len(r.Request.Errs) > 0 { + return sendAndReturnClosed(&Response{Errors: r.Request.Errs}) + } + + if f == nil { + return sendAndReturnClosed(&Response{Errors: []*errors.QueryError{err}}) + } + + if err != nil { + if _, nonNullChild := f.field.Type.(*types.NonNull); nonNullChild { + return sendAndReturnClosed(&Response{Errors: []*errors.QueryError{err}}) + } + return sendAndReturnClosed(&Response{Data: []byte(fmt.Sprintf(`{"%s":null}`, f.field.Alias)), Errors: []*errors.QueryError{err}}) + } + + if ctxErr := ctx.Err(); ctxErr != nil { + return sendAndReturnClosed(&Response{Errors: []*errors.QueryError{errors.Errorf("%s", ctxErr)}}) + } + + c := make(chan *Response) + // TODO: handle resolver nil channel better? + if result.IsZero() { + close(c) + return c + } + + go func() { + for { + // Check subscription context + chosen, resp, ok := reflect.Select([]reflect.SelectCase{ + { + Dir: reflect.SelectRecv, + Chan: reflect.ValueOf(ctx.Done()), + }, + { + Dir: reflect.SelectRecv, + Chan: result, + }, + }) + switch chosen { + // subscription context done + case 0: + close(c) + return + // upstream received + case 1: + // upstream closed + if !ok { + close(c) + return + } + + subR := &Request{ + Request: selected.Request{ + Doc: r.Request.Doc, + Vars: r.Request.Vars, + Schema: r.Request.Schema, + }, + Limiter: r.Limiter, + Tracer: r.Tracer, + Logger: r.Logger, + } + var out bytes.Buffer + func() { + timeout := r.SubscribeResolverTimeout + if timeout == 0 { + timeout = time.Second + } + + subCtx, cancel := context.WithTimeout(ctx, timeout) + defer cancel() + + // resolve response + func() { + defer subR.handlePanic(subCtx) + + var buf bytes.Buffer + subR.execSelectionSet(subCtx, f.sels, f.field.Type, &pathSegment{nil, f.field.Alias}, s, resp, &buf) + + propagateChildError := false + if _, nonNullChild := f.field.Type.(*types.NonNull); nonNullChild && resolvedToNull(&buf) { + propagateChildError = true + } + + if !propagateChildError { + out.WriteString(fmt.Sprintf(`{"%s":`, f.field.Alias)) + out.Write(buf.Bytes()) + out.WriteString(`}`) + } + }() + + if err := subCtx.Err(); err != nil { + c <- &Response{Errors: []*errors.QueryError{errors.Errorf("%s", err)}} + return + } + + // Send response within timeout + // TODO: maybe block until sent? + select { + case <-subCtx.Done(): + case c <- &Response{Data: out.Bytes(), Errors: subR.Errs}: + } + }() + } + } + }() + + return c +} + +func sendAndReturnClosed(resp *Response) chan *Response { + c := make(chan *Response, 1) + c <- resp + close(c) + return c +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/query/query.go b/vendor/github.com/graph-gophers/graphql-go/internal/query/query.go new file mode 100644 index 00000000..ca0400cd --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/query/query.go @@ -0,0 +1,156 @@ +package query + +import ( + "fmt" + "text/scanner" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/common" + "github.com/graph-gophers/graphql-go/types" +) + +const ( + Query types.OperationType = "QUERY" + Mutation types.OperationType = "MUTATION" + Subscription types.OperationType = "SUBSCRIPTION" +) + +func Parse(queryString string) (*types.ExecutableDefinition, *errors.QueryError) { + l := common.NewLexer(queryString, false) + + var execDef *types.ExecutableDefinition + err := l.CatchSyntaxError(func() { execDef = parseExecutableDefinition(l) }) + if err != nil { + return nil, err + } + + return execDef, nil +} + +func parseExecutableDefinition(l *common.Lexer) *types.ExecutableDefinition { + ed := &types.ExecutableDefinition{} + l.ConsumeWhitespace() + for l.Peek() != scanner.EOF { + if l.Peek() == '{' { + op := &types.OperationDefinition{Type: Query, Loc: l.Location()} + op.Selections = parseSelectionSet(l) + ed.Operations = append(ed.Operations, op) + continue + } + + loc := l.Location() + switch x := l.ConsumeIdent(); x { + case "query": + op := parseOperation(l, Query) + op.Loc = loc + ed.Operations = append(ed.Operations, op) + + case "mutation": + ed.Operations = append(ed.Operations, parseOperation(l, Mutation)) + + case "subscription": + ed.Operations = append(ed.Operations, parseOperation(l, Subscription)) + + case "fragment": + frag := parseFragment(l) + frag.Loc = loc + ed.Fragments = append(ed.Fragments, frag) + + default: + l.SyntaxError(fmt.Sprintf(`unexpected %q, expecting "fragment"`, x)) + } + } + return ed +} + +func parseOperation(l *common.Lexer, opType types.OperationType) *types.OperationDefinition { + op := &types.OperationDefinition{Type: opType} + op.Name.Loc = l.Location() + if l.Peek() == scanner.Ident { + op.Name = l.ConsumeIdentWithLoc() + } + op.Directives = common.ParseDirectives(l) + if l.Peek() == '(' { + l.ConsumeToken('(') + for l.Peek() != ')' { + loc := l.Location() + l.ConsumeToken('$') + iv := common.ParseInputValue(l) + iv.Loc = loc + op.Vars = append(op.Vars, iv) + } + l.ConsumeToken(')') + } + op.Selections = parseSelectionSet(l) + return op +} + +func parseFragment(l *common.Lexer) *types.FragmentDefinition { + f := &types.FragmentDefinition{} + f.Name = l.ConsumeIdentWithLoc() + l.ConsumeKeyword("on") + f.On = types.TypeName{Ident: l.ConsumeIdentWithLoc()} + f.Directives = common.ParseDirectives(l) + f.Selections = parseSelectionSet(l) + return f +} + +func parseSelectionSet(l *common.Lexer) []types.Selection { + var sels []types.Selection + l.ConsumeToken('{') + for l.Peek() != '}' { + sels = append(sels, parseSelection(l)) + } + l.ConsumeToken('}') + return sels +} + +func parseSelection(l *common.Lexer) types.Selection { + if l.Peek() == '.' { + return parseSpread(l) + } + return parseFieldDef(l) +} + +func parseFieldDef(l *common.Lexer) *types.Field { + f := &types.Field{} + f.Alias = l.ConsumeIdentWithLoc() + f.Name = f.Alias + if l.Peek() == ':' { + l.ConsumeToken(':') + f.Name = l.ConsumeIdentWithLoc() + } + if l.Peek() == '(' { + f.Arguments = common.ParseArgumentList(l) + } + f.Directives = common.ParseDirectives(l) + if l.Peek() == '{' { + f.SelectionSetLoc = l.Location() + f.SelectionSet = parseSelectionSet(l) + } + return f +} + +func parseSpread(l *common.Lexer) types.Selection { + loc := l.Location() + l.ConsumeToken('.') + l.ConsumeToken('.') + l.ConsumeToken('.') + + f := &types.InlineFragment{Loc: loc} + if l.Peek() == scanner.Ident { + ident := l.ConsumeIdentWithLoc() + if ident.Name != "on" { + fs := &types.FragmentSpread{ + Name: ident, + Loc: loc, + } + fs.Directives = common.ParseDirectives(l) + return fs + } + f.On = types.TypeName{Ident: l.ConsumeIdentWithLoc()} + } + f.Directives = common.ParseDirectives(l) + f.Selections = parseSelectionSet(l) + return f +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/schema/meta.go b/vendor/github.com/graph-gophers/graphql-go/internal/schema/meta.go new file mode 100644 index 00000000..9f5bba56 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/schema/meta.go @@ -0,0 +1,203 @@ +package schema + +import ( + "github.com/graph-gophers/graphql-go/types" +) + +func init() { + _ = newMeta() +} + +// newMeta initializes an instance of the meta Schema. +func newMeta() *types.Schema { + s := &types.Schema{ + EntryPointNames: make(map[string]string), + Types: make(map[string]types.NamedType), + Directives: make(map[string]*types.DirectiveDefinition), + } + + err := Parse(s, metaSrc, false) + if err != nil { + panic(err) + } + return s +} + +var metaSrc = ` + # The ` + "`" + `Int` + "`" + ` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1. + scalar Int + + # The ` + "`" + `Float` + "`" + ` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). + scalar Float + + # The ` + "`" + `String` + "`" + ` scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text. + scalar String + + # The ` + "`" + `Boolean` + "`" + ` scalar type represents ` + "`" + `true` + "`" + ` or ` + "`" + `false` + "`" + `. + scalar Boolean + + # The ` + "`" + `ID` + "`" + ` scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as ` + "`" + `"4"` + "`" + `) or integer (such as ` + "`" + `4` + "`" + `) input value will be accepted as an ID. + scalar ID + + # Directs the executor to include this field or fragment only when the ` + "`" + `if` + "`" + ` argument is true. + directive @include( + # Included when true. + if: Boolean! + ) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT + + # Directs the executor to skip this field or fragment when the ` + "`" + `if` + "`" + ` argument is true. + directive @skip( + # Skipped when true. + if: Boolean! + ) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT + + # Marks an element of a GraphQL schema as no longer supported. + directive @deprecated( + # Explains why this element was deprecated, usually also including a suggestion + # for how to access supported similar data. Formatted in + # [Markdown](https://daringfireball.net/projects/markdown/). + reason: String = "No longer supported" + ) on FIELD_DEFINITION | ENUM_VALUE + + # A Directive provides a way to describe alternate runtime execution and type validation behavior in a GraphQL document. + # + # In some cases, you need to provide options to alter GraphQL's execution behavior + # in ways field arguments will not suffice, such as conditionally including or + # skipping a field. Directives provide this by describing additional information + # to the executor. + type __Directive { + name: String! + description: String + locations: [__DirectiveLocation!]! + args: [__InputValue!]! + } + + # A Directive can be adjacent to many parts of the GraphQL language, a + # __DirectiveLocation describes one such possible adjacencies. + enum __DirectiveLocation { + # Location adjacent to a query operation. + QUERY + # Location adjacent to a mutation operation. + MUTATION + # Location adjacent to a subscription operation. + SUBSCRIPTION + # Location adjacent to a field. + FIELD + # Location adjacent to a fragment definition. + FRAGMENT_DEFINITION + # Location adjacent to a fragment spread. + FRAGMENT_SPREAD + # Location adjacent to an inline fragment. + INLINE_FRAGMENT + # Location adjacent to a schema definition. + SCHEMA + # Location adjacent to a scalar definition. + SCALAR + # Location adjacent to an object type definition. + OBJECT + # Location adjacent to a field definition. + FIELD_DEFINITION + # Location adjacent to an argument definition. + ARGUMENT_DEFINITION + # Location adjacent to an interface definition. + INTERFACE + # Location adjacent to a union definition. + UNION + # Location adjacent to an enum definition. + ENUM + # Location adjacent to an enum value definition. + ENUM_VALUE + # Location adjacent to an input object type definition. + INPUT_OBJECT + # Location adjacent to an input object field definition. + INPUT_FIELD_DEFINITION + } + + # One possible value for a given Enum. Enum values are unique values, not a + # placeholder for a string or numeric value. However an Enum value is returned in + # a JSON response as a string. + type __EnumValue { + name: String! + description: String + isDeprecated: Boolean! + deprecationReason: String + } + + # Object and Interface types are described by a list of Fields, each of which has + # a name, potentially a list of arguments, and a return type. + type __Field { + name: String! + description: String + args: [__InputValue!]! + type: __Type! + isDeprecated: Boolean! + deprecationReason: String + } + + # Arguments provided to Fields or Directives and the input fields of an + # InputObject are represented as Input Values which describe their type and + # optionally a default value. + type __InputValue { + name: String! + description: String + type: __Type! + # A GraphQL-formatted string representing the default value for this input value. + defaultValue: String + } + + # A GraphQL Schema defines the capabilities of a GraphQL server. It exposes all + # available types and directives on the server, as well as the entry points for + # query, mutation, and subscription operations. + type __Schema { + # A list of all types supported by this server. + types: [__Type!]! + # The type that query operations will be rooted at. + queryType: __Type! + # If this server supports mutation, the type that mutation operations will be rooted at. + mutationType: __Type + # If this server support subscription, the type that subscription operations will be rooted at. + subscriptionType: __Type + # A list of all directives supported by this server. + directives: [__Directive!]! + } + + # The fundamental unit of any GraphQL Schema is the type. There are many kinds of + # types in GraphQL as represented by the ` + "`" + `__TypeKind` + "`" + ` enum. + # + # Depending on the kind of a type, certain fields describe information about that + # type. Scalar types provide no information beyond a name and description, while + # Enum types provide their values. Object and Interface types provide the fields + # they describe. Abstract types, Union and Interface, provide the Object types + # possible at runtime. List and NonNull types compose other types. + type __Type { + kind: __TypeKind! + name: String + description: String + fields(includeDeprecated: Boolean = false): [__Field!] + interfaces: [__Type!] + possibleTypes: [__Type!] + enumValues(includeDeprecated: Boolean = false): [__EnumValue!] + inputFields: [__InputValue!] + ofType: __Type + } + + # An enum describing what kind of type a given ` + "`" + `__Type` + "`" + ` is. + enum __TypeKind { + # Indicates this type is a scalar. + SCALAR + # Indicates this type is an object. ` + "`" + `fields` + "`" + ` and ` + "`" + `interfaces` + "`" + ` are valid fields. + OBJECT + # Indicates this type is an interface. ` + "`" + `fields` + "`" + ` and ` + "`" + `possibleTypes` + "`" + ` are valid fields. + INTERFACE + # Indicates this type is a union. ` + "`" + `possibleTypes` + "`" + ` is a valid field. + UNION + # Indicates this type is an enum. ` + "`" + `enumValues` + "`" + ` is a valid field. + ENUM + # Indicates this type is an input object. ` + "`" + `inputFields` + "`" + ` is a valid field. + INPUT_OBJECT + # Indicates this type is a list. ` + "`" + `ofType` + "`" + ` is a valid field. + LIST + # Indicates this type is a non-null. ` + "`" + `ofType` + "`" + ` is a valid field. + NON_NULL + } +` diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/schema/schema.go b/vendor/github.com/graph-gophers/graphql-go/internal/schema/schema.go new file mode 100644 index 00000000..fb301c46 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/schema/schema.go @@ -0,0 +1,586 @@ +package schema + +import ( + "fmt" + "text/scanner" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/common" + "github.com/graph-gophers/graphql-go/types" +) + +// New initializes an instance of Schema. +func New() *types.Schema { + s := &types.Schema{ + EntryPointNames: make(map[string]string), + Types: make(map[string]types.NamedType), + Directives: make(map[string]*types.DirectiveDefinition), + } + m := newMeta() + for n, t := range m.Types { + s.Types[n] = t + } + for n, d := range m.Directives { + s.Directives[n] = d + } + return s +} + +func Parse(s *types.Schema, schemaString string, useStringDescriptions bool) error { + l := common.NewLexer(schemaString, useStringDescriptions) + err := l.CatchSyntaxError(func() { parseSchema(s, l) }) + if err != nil { + return err + } + + if err := mergeExtensions(s); err != nil { + return err + } + + for _, t := range s.Types { + if err := resolveNamedType(s, t); err != nil { + return err + } + } + for _, d := range s.Directives { + for _, arg := range d.Arguments { + t, err := common.ResolveType(arg.Type, s.Resolve) + if err != nil { + return err + } + arg.Type = t + } + } + + // https://graphql.github.io/graphql-spec/June2018/#sec-Root-Operation-Types + // > While any type can be the root operation type for a GraphQL operation, the type system definition language can + // > omit the schema definition when the query, mutation, and subscription root types are named Query, Mutation, + // > and Subscription respectively. + if len(s.EntryPointNames) == 0 { + if _, ok := s.Types["Query"]; ok { + s.EntryPointNames["query"] = "Query" + } + if _, ok := s.Types["Mutation"]; ok { + s.EntryPointNames["mutation"] = "Mutation" + } + if _, ok := s.Types["Subscription"]; ok { + s.EntryPointNames["subscription"] = "Subscription" + } + } + s.EntryPoints = make(map[string]types.NamedType) + for key, name := range s.EntryPointNames { + t, ok := s.Types[name] + if !ok { + return errors.Errorf("type %q not found", name) + } + s.EntryPoints[key] = t + } + + // Interface types need validation: https://spec.graphql.org/draft/#sec-Interfaces.Interfaces-Implementing-Interfaces + for _, typeDef := range s.Types { + switch t := typeDef.(type) { + case *types.InterfaceTypeDefinition: + for i, implements := range t.Interfaces { + typ, ok := s.Types[implements.Name] + if !ok { + return errors.Errorf("interface %q not found", implements) + } + inteface, ok := typ.(*types.InterfaceTypeDefinition) + if !ok { + return errors.Errorf("type %q is not an interface", inteface) + } + + for _, f := range inteface.Fields.Names() { + if t.Fields.Get(f) == nil { + return errors.Errorf("interface %q expects field %q but %q does not provide it", inteface.Name, f, t.Name) + } + } + + t.Interfaces[i] = inteface + } + default: + continue + } + } + + for _, obj := range s.Objects { + obj.Interfaces = make([]*types.InterfaceTypeDefinition, len(obj.InterfaceNames)) + if err := resolveDirectives(s, obj.Directives, "OBJECT"); err != nil { + return err + } + for _, field := range obj.Fields { + if err := resolveDirectives(s, field.Directives, "FIELD_DEFINITION"); err != nil { + return err + } + } + for i, intfName := range obj.InterfaceNames { + t, ok := s.Types[intfName] + if !ok { + return errors.Errorf("interface %q not found", intfName) + } + intf, ok := t.(*types.InterfaceTypeDefinition) + if !ok { + return errors.Errorf("type %q is not an interface", intfName) + } + for _, f := range intf.Fields.Names() { + if obj.Fields.Get(f) == nil { + return errors.Errorf("interface %q expects field %q but %q does not provide it", intfName, f, obj.Name) + } + } + obj.Interfaces[i] = intf + intf.PossibleTypes = append(intf.PossibleTypes, obj) + } + } + + for _, union := range s.Unions { + if err := resolveDirectives(s, union.Directives, "UNION"); err != nil { + return err + } + union.UnionMemberTypes = make([]*types.ObjectTypeDefinition, len(union.TypeNames)) + for i, name := range union.TypeNames { + t, ok := s.Types[name] + if !ok { + return errors.Errorf("object type %q not found", name) + } + obj, ok := t.(*types.ObjectTypeDefinition) + if !ok { + return errors.Errorf("type %q is not an object", name) + } + union.UnionMemberTypes[i] = obj + } + } + + for _, enum := range s.Enums { + if err := resolveDirectives(s, enum.Directives, "ENUM"); err != nil { + return err + } + for _, value := range enum.EnumValuesDefinition { + if err := resolveDirectives(s, value.Directives, "ENUM_VALUE"); err != nil { + return err + } + } + } + + return nil +} + +func ParseSchema(schemaString string, useStringDescriptions bool) (*types.Schema, error) { + s := New() + err := Parse(s, schemaString, useStringDescriptions) + return s, err +} + +func mergeExtensions(s *types.Schema) error { + for _, ext := range s.Extensions { + typ := s.Types[ext.Type.TypeName()] + if typ == nil { + return fmt.Errorf("trying to extend unknown type %q", ext.Type.TypeName()) + } + + if typ.Kind() != ext.Type.Kind() { + return fmt.Errorf("trying to extend type %q with type %q", typ.Kind(), ext.Type.Kind()) + } + + switch og := typ.(type) { + case *types.ObjectTypeDefinition: + e := ext.Type.(*types.ObjectTypeDefinition) + + for _, field := range e.Fields { + if og.Fields.Get(field.Name) != nil { + return fmt.Errorf("extended field %q already exists", field.Name) + } + } + og.Fields = append(og.Fields, e.Fields...) + + for _, en := range e.InterfaceNames { + for _, on := range og.InterfaceNames { + if on == en { + return fmt.Errorf("interface %q implemented in the extension is already implemented in %q", on, og.Name) + } + } + } + og.InterfaceNames = append(og.InterfaceNames, e.InterfaceNames...) + + case *types.InputObject: + e := ext.Type.(*types.InputObject) + + for _, field := range e.Values { + if og.Values.Get(field.Name.Name) != nil { + return fmt.Errorf("extended field %q already exists", field.Name) + } + } + og.Values = append(og.Values, e.Values...) + + case *types.InterfaceTypeDefinition: + e := ext.Type.(*types.InterfaceTypeDefinition) + + for _, field := range e.Fields { + if og.Fields.Get(field.Name) != nil { + return fmt.Errorf("extended field %s already exists", field.Name) + } + } + og.Fields = append(og.Fields, e.Fields...) + + case *types.Union: + e := ext.Type.(*types.Union) + + for _, en := range e.TypeNames { + for _, on := range og.TypeNames { + if on == en { + return fmt.Errorf("union type %q already declared in %q", on, og.Name) + } + } + } + og.TypeNames = append(og.TypeNames, e.TypeNames...) + + case *types.EnumTypeDefinition: + e := ext.Type.(*types.EnumTypeDefinition) + + for _, en := range e.EnumValuesDefinition { + for _, on := range og.EnumValuesDefinition { + if on.EnumValue == en.EnumValue { + return fmt.Errorf("enum value %q already declared in %q", on.EnumValue, og.Name) + } + } + } + og.EnumValuesDefinition = append(og.EnumValuesDefinition, e.EnumValuesDefinition...) + default: + return fmt.Errorf(`unexpected %q, expecting "schema", "type", "enum", "interface", "union" or "input"`, og.TypeName()) + } + } + + return nil +} + +func resolveNamedType(s *types.Schema, t types.NamedType) error { + switch t := t.(type) { + case *types.ObjectTypeDefinition: + for _, f := range t.Fields { + if err := resolveField(s, f); err != nil { + return err + } + } + case *types.InterfaceTypeDefinition: + for _, f := range t.Fields { + if err := resolveField(s, f); err != nil { + return err + } + } + case *types.InputObject: + if err := resolveInputObject(s, t.Values); err != nil { + return err + } + } + return nil +} + +func resolveField(s *types.Schema, f *types.FieldDefinition) error { + t, err := common.ResolveType(f.Type, s.Resolve) + if err != nil { + return err + } + f.Type = t + if err := resolveDirectives(s, f.Directives, "FIELD_DEFINITION"); err != nil { + return err + } + return resolveInputObject(s, f.Arguments) +} + +func resolveDirectives(s *types.Schema, directives types.DirectiveList, loc string) error { + for _, d := range directives { + dirName := d.Name.Name + dd, ok := s.Directives[dirName] + if !ok { + return errors.Errorf("directive %q not found", dirName) + } + validLoc := false + for _, l := range dd.Locations { + if l == loc { + validLoc = true + break + } + } + if !validLoc { + return errors.Errorf("invalid location %q for directive %q (must be one of %v)", loc, dirName, dd.Locations) + } + for _, arg := range d.Arguments { + if dd.Arguments.Get(arg.Name.Name) == nil { + return errors.Errorf("invalid argument %q for directive %q", arg.Name.Name, dirName) + } + } + for _, arg := range dd.Arguments { + if _, ok := d.Arguments.Get(arg.Name.Name); !ok { + d.Arguments = append(d.Arguments, &types.Argument{Name: arg.Name, Value: arg.Default}) + } + } + } + return nil +} + +func resolveInputObject(s *types.Schema, values types.ArgumentsDefinition) error { + for _, v := range values { + t, err := common.ResolveType(v.Type, s.Resolve) + if err != nil { + return err + } + v.Type = t + } + return nil +} + +func parseSchema(s *types.Schema, l *common.Lexer) { + l.ConsumeWhitespace() + + for l.Peek() != scanner.EOF { + desc := l.DescComment() + switch x := l.ConsumeIdent(); x { + + case "schema": + l.ConsumeToken('{') + for l.Peek() != '}' { + + name := l.ConsumeIdent() + l.ConsumeToken(':') + typ := l.ConsumeIdent() + s.EntryPointNames[name] = typ + } + l.ConsumeToken('}') + + case "type": + obj := parseObjectDef(l) + obj.Desc = desc + s.Types[obj.Name] = obj + s.Objects = append(s.Objects, obj) + + case "interface": + iface := parseInterfaceDef(l) + iface.Desc = desc + s.Types[iface.Name] = iface + + case "union": + union := parseUnionDef(l) + union.Desc = desc + s.Types[union.Name] = union + s.Unions = append(s.Unions, union) + + case "enum": + enum := parseEnumDef(l) + enum.Desc = desc + s.Types[enum.Name] = enum + s.Enums = append(s.Enums, enum) + + case "input": + input := parseInputDef(l) + input.Desc = desc + s.Types[input.Name] = input + + case "scalar": + loc := l.Location() + name := l.ConsumeIdent() + directives := common.ParseDirectives(l) + s.Types[name] = &types.ScalarTypeDefinition{Name: name, Desc: desc, Directives: directives, Loc: loc} + + case "directive": + directive := parseDirectiveDef(l) + directive.Desc = desc + s.Directives[directive.Name] = directive + + case "extend": + parseExtension(s, l) + + default: + // TODO: Add support for type extensions. + l.SyntaxError(fmt.Sprintf(`unexpected %q, expecting "schema", "type", "enum", "interface", "union", "input", "scalar" or "directive"`, x)) + } + } +} + +func parseObjectDef(l *common.Lexer) *types.ObjectTypeDefinition { + object := &types.ObjectTypeDefinition{Loc: l.Location(), Name: l.ConsumeIdent()} + + for { + if l.Peek() == '{' { + break + } + + if l.Peek() == '@' { + object.Directives = common.ParseDirectives(l) + continue + } + + if l.Peek() == scanner.Ident { + l.ConsumeKeyword("implements") + + for l.Peek() != '{' && l.Peek() != '@' { + if l.Peek() == '&' { + l.ConsumeToken('&') + } + + object.InterfaceNames = append(object.InterfaceNames, l.ConsumeIdent()) + } + continue + } + + } + l.ConsumeToken('{') + object.Fields = parseFieldsDef(l) + l.ConsumeToken('}') + + return object + +} + +func parseInterfaceDef(l *common.Lexer) *types.InterfaceTypeDefinition { + i := &types.InterfaceTypeDefinition{Loc: l.Location(), Name: l.ConsumeIdent()} + + if l.Peek() == scanner.Ident { + l.ConsumeKeyword("implements") + i.Interfaces = append(i.Interfaces, &types.InterfaceTypeDefinition{Name: l.ConsumeIdent()}) + + for l.Peek() == '&' { + l.ConsumeToken('&') + i.Interfaces = append(i.Interfaces, &types.InterfaceTypeDefinition{Name: l.ConsumeIdent()}) + } + } + + i.Directives = common.ParseDirectives(l) + + l.ConsumeToken('{') + i.Fields = parseFieldsDef(l) + l.ConsumeToken('}') + + return i +} + +func parseUnionDef(l *common.Lexer) *types.Union { + union := &types.Union{Loc: l.Location(), Name: l.ConsumeIdent()} + + union.Directives = common.ParseDirectives(l) + l.ConsumeToken('=') + union.TypeNames = []string{l.ConsumeIdent()} + for l.Peek() == '|' { + l.ConsumeToken('|') + union.TypeNames = append(union.TypeNames, l.ConsumeIdent()) + } + + return union +} + +func parseInputDef(l *common.Lexer) *types.InputObject { + i := &types.InputObject{} + i.Loc = l.Location() + i.Name = l.ConsumeIdent() + i.Directives = common.ParseDirectives(l) + l.ConsumeToken('{') + for l.Peek() != '}' { + i.Values = append(i.Values, common.ParseInputValue(l)) + } + l.ConsumeToken('}') + return i +} + +func parseEnumDef(l *common.Lexer) *types.EnumTypeDefinition { + enum := &types.EnumTypeDefinition{Loc: l.Location(), Name: l.ConsumeIdent()} + + enum.Directives = common.ParseDirectives(l) + l.ConsumeToken('{') + for l.Peek() != '}' { + v := &types.EnumValueDefinition{ + Desc: l.DescComment(), + Loc: l.Location(), + EnumValue: l.ConsumeIdent(), + Directives: common.ParseDirectives(l), + } + + enum.EnumValuesDefinition = append(enum.EnumValuesDefinition, v) + } + l.ConsumeToken('}') + return enum +} +func parseDirectiveDef(l *common.Lexer) *types.DirectiveDefinition { + l.ConsumeToken('@') + loc := l.Location() + d := &types.DirectiveDefinition{Name: l.ConsumeIdent(), Loc: loc} + + if l.Peek() == '(' { + l.ConsumeToken('(') + for l.Peek() != ')' { + v := common.ParseInputValue(l) + d.Arguments = append(d.Arguments, v) + } + l.ConsumeToken(')') + } + + l.ConsumeKeyword("on") + + for { + loc := l.ConsumeIdent() + d.Locations = append(d.Locations, loc) + if l.Peek() != '|' { + break + } + l.ConsumeToken('|') + } + return d +} + +func parseExtension(s *types.Schema, l *common.Lexer) { + loc := l.Location() + switch x := l.ConsumeIdent(); x { + case "schema": + l.ConsumeToken('{') + for l.Peek() != '}' { + name := l.ConsumeIdent() + l.ConsumeToken(':') + typ := l.ConsumeIdent() + s.EntryPointNames[name] = typ + } + l.ConsumeToken('}') + + case "type": + obj := parseObjectDef(l) + s.Extensions = append(s.Extensions, &types.Extension{Type: obj, Loc: loc}) + + case "interface": + iface := parseInterfaceDef(l) + s.Extensions = append(s.Extensions, &types.Extension{Type: iface, Loc: loc}) + + case "union": + union := parseUnionDef(l) + s.Extensions = append(s.Extensions, &types.Extension{Type: union, Loc: loc}) + + case "enum": + enum := parseEnumDef(l) + s.Extensions = append(s.Extensions, &types.Extension{Type: enum, Loc: loc}) + + case "input": + input := parseInputDef(l) + s.Extensions = append(s.Extensions, &types.Extension{Type: input, Loc: loc}) + + default: + // TODO: Add ScalarTypeDefinition when adding directives + l.SyntaxError(fmt.Sprintf(`unexpected %q, expecting "schema", "type", "enum", "interface", "union" or "input"`, x)) + } +} + +func parseFieldsDef(l *common.Lexer) types.FieldsDefinition { + var fields types.FieldsDefinition + for l.Peek() != '}' { + f := &types.FieldDefinition{} + f.Desc = l.DescComment() + f.Loc = l.Location() + f.Name = l.ConsumeIdent() + if l.Peek() == '(' { + l.ConsumeToken('(') + for l.Peek() != ')' { + f.Arguments = append(f.Arguments, common.ParseInputValue(l)) + } + l.ConsumeToken(')') + } + l.ConsumeToken(':') + f.Type = common.ParseType(l) + f.Directives = common.ParseDirectives(l) + fields = append(fields, f) + } + return fields +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/validation/suggestion.go b/vendor/github.com/graph-gophers/graphql-go/internal/validation/suggestion.go new file mode 100644 index 00000000..9702b5f5 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/validation/suggestion.go @@ -0,0 +1,71 @@ +package validation + +import ( + "fmt" + "sort" + "strconv" + "strings" +) + +func makeSuggestion(prefix string, options []string, input string) string { + var selected []string + distances := make(map[string]int) + for _, opt := range options { + distance := levenshteinDistance(input, opt) + threshold := max(len(input)/2, max(len(opt)/2, 1)) + if distance < threshold { + selected = append(selected, opt) + distances[opt] = distance + } + } + + if len(selected) == 0 { + return "" + } + sort.Slice(selected, func(i, j int) bool { + return distances[selected[i]] < distances[selected[j]] + }) + + parts := make([]string, len(selected)) + for i, opt := range selected { + parts[i] = strconv.Quote(opt) + } + if len(parts) > 1 { + parts[len(parts)-1] = "or " + parts[len(parts)-1] + } + return fmt.Sprintf(" %s %s?", prefix, strings.Join(parts, ", ")) +} + +func levenshteinDistance(s1, s2 string) int { + column := make([]int, len(s1)+1) + for y := range s1 { + column[y+1] = y + 1 + } + for x, rx := range s2 { + column[0] = x + 1 + lastdiag := x + for y, ry := range s1 { + olddiag := column[y+1] + if rx != ry { + lastdiag++ + } + column[y+1] = min(column[y+1]+1, min(column[y]+1, lastdiag)) + lastdiag = olddiag + } + } + return column[len(s1)] +} + +func min(a, b int) int { + if a < b { + return a + } + return b +} + +func max(a, b int) int { + if a > b { + return a + } + return b +} diff --git a/vendor/github.com/graph-gophers/graphql-go/internal/validation/validation.go b/vendor/github.com/graph-gophers/graphql-go/internal/validation/validation.go new file mode 100644 index 00000000..e3672638 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/internal/validation/validation.go @@ -0,0 +1,980 @@ +package validation + +import ( + "fmt" + "math" + "reflect" + "strconv" + "strings" + "text/scanner" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/common" + "github.com/graph-gophers/graphql-go/internal/query" + "github.com/graph-gophers/graphql-go/types" +) + +type varSet map[*types.InputValueDefinition]struct{} + +type selectionPair struct{ a, b types.Selection } + +type nameSet map[string]errors.Location + +type fieldInfo struct { + sf *types.FieldDefinition + parent types.NamedType +} + +type context struct { + schema *types.Schema + doc *types.ExecutableDefinition + errs []*errors.QueryError + opErrs map[*types.OperationDefinition][]*errors.QueryError + usedVars map[*types.OperationDefinition]varSet + fieldMap map[*types.Field]fieldInfo + overlapValidated map[selectionPair]struct{} + maxDepth int +} + +func (c *context) addErr(loc errors.Location, rule string, format string, a ...interface{}) { + c.addErrMultiLoc([]errors.Location{loc}, rule, format, a...) +} + +func (c *context) addErrMultiLoc(locs []errors.Location, rule string, format string, a ...interface{}) { + c.errs = append(c.errs, &errors.QueryError{ + Message: fmt.Sprintf(format, a...), + Locations: locs, + Rule: rule, + }) +} + +type opContext struct { + *context + ops []*types.OperationDefinition +} + +func newContext(s *types.Schema, doc *types.ExecutableDefinition, maxDepth int) *context { + return &context{ + schema: s, + doc: doc, + opErrs: make(map[*types.OperationDefinition][]*errors.QueryError), + usedVars: make(map[*types.OperationDefinition]varSet), + fieldMap: make(map[*types.Field]fieldInfo), + overlapValidated: make(map[selectionPair]struct{}), + maxDepth: maxDepth, + } +} + +func Validate(s *types.Schema, doc *types.ExecutableDefinition, variables map[string]interface{}, maxDepth int) []*errors.QueryError { + c := newContext(s, doc, maxDepth) + + opNames := make(nameSet) + fragUsedBy := make(map[*types.FragmentDefinition][]*types.OperationDefinition) + for _, op := range doc.Operations { + c.usedVars[op] = make(varSet) + opc := &opContext{c, []*types.OperationDefinition{op}} + + // Check if max depth is exceeded, if it's set. If max depth is exceeded, + // don't continue to validate the document and exit early. + if validateMaxDepth(opc, op.Selections, nil, 1) { + return c.errs + } + + if op.Name.Name == "" && len(doc.Operations) != 1 { + c.addErr(op.Loc, "LoneAnonymousOperation", "This anonymous operation must be the only defined operation.") + } + if op.Name.Name != "" { + validateName(c, opNames, op.Name, "UniqueOperationNames", "operation") + } + + validateDirectives(opc, string(op.Type), op.Directives) + + varNames := make(nameSet) + for _, v := range op.Vars { + validateName(c, varNames, v.Name, "UniqueVariableNames", "variable") + + t := resolveType(c, v.Type) + if !canBeInput(t) { + c.addErr(v.TypeLoc, "VariablesAreInputTypes", "Variable %q cannot be non-input type %q.", "$"+v.Name.Name, t) + } + validateValue(opc, v, variables[v.Name.Name], t) + + if v.Default != nil { + validateLiteral(opc, v.Default) + + if t != nil { + if nn, ok := t.(*types.NonNull); ok { + c.addErr(v.Default.Location(), "DefaultValuesOfCorrectType", "Variable %q of type %q is required and will not use the default value. Perhaps you meant to use type %q.", "$"+v.Name.Name, t, nn.OfType) + } + + if ok, reason := validateValueType(opc, v.Default, t); !ok { + c.addErr(v.Default.Location(), "DefaultValuesOfCorrectType", "Variable %q of type %q has invalid default value %s.\n%s", "$"+v.Name.Name, t, v.Default, reason) + } + } + } + } + + var entryPoint types.NamedType + switch op.Type { + case query.Query: + entryPoint = s.EntryPoints["query"] + case query.Mutation: + entryPoint = s.EntryPoints["mutation"] + case query.Subscription: + entryPoint = s.EntryPoints["subscription"] + default: + panic("unreachable") + } + + validateSelectionSet(opc, op.Selections, entryPoint) + + fragUsed := make(map[*types.FragmentDefinition]struct{}) + markUsedFragments(c, op.Selections, fragUsed) + for frag := range fragUsed { + fragUsedBy[frag] = append(fragUsedBy[frag], op) + } + } + + fragNames := make(nameSet) + fragVisited := make(map[*types.FragmentDefinition]struct{}) + for _, frag := range doc.Fragments { + opc := &opContext{c, fragUsedBy[frag]} + + validateName(c, fragNames, frag.Name, "UniqueFragmentNames", "fragment") + validateDirectives(opc, "FRAGMENT_DEFINITION", frag.Directives) + + t := unwrapType(resolveType(c, &frag.On)) + // continue even if t is nil + if t != nil && !canBeFragment(t) { + c.addErr(frag.On.Loc, "FragmentsOnCompositeTypes", "Fragment %q cannot condition on non composite type %q.", frag.Name.Name, t) + continue + } + + validateSelectionSet(opc, frag.Selections, t) + + if _, ok := fragVisited[frag]; !ok { + detectFragmentCycle(c, frag.Selections, fragVisited, nil, map[string]int{frag.Name.Name: 0}) + } + } + + for _, frag := range doc.Fragments { + if len(fragUsedBy[frag]) == 0 { + c.addErr(frag.Loc, "NoUnusedFragments", "Fragment %q is never used.", frag.Name.Name) + } + } + + for _, op := range doc.Operations { + c.errs = append(c.errs, c.opErrs[op]...) + + opUsedVars := c.usedVars[op] + for _, v := range op.Vars { + if _, ok := opUsedVars[v]; !ok { + opSuffix := "" + if op.Name.Name != "" { + opSuffix = fmt.Sprintf(" in operation %q", op.Name.Name) + } + c.addErr(v.Loc, "NoUnusedVariables", "Variable %q is never used%s.", "$"+v.Name.Name, opSuffix) + } + } + } + + return c.errs +} + +func validateValue(c *opContext, v *types.InputValueDefinition, val interface{}, t types.Type) { + switch t := t.(type) { + case *types.NonNull: + if val == nil { + c.addErr(v.Loc, "VariablesOfCorrectType", "Variable \"%s\" has invalid value null.\nExpected type \"%s\", found null.", v.Name.Name, t) + return + } + validateValue(c, v, val, t.OfType) + case *types.List: + if val == nil { + return + } + vv, ok := val.([]interface{}) + if !ok { + // Input coercion rules allow single items without wrapping array + validateValue(c, v, val, t.OfType) + return + } + for _, elem := range vv { + validateValue(c, v, elem, t.OfType) + } + case *types.EnumTypeDefinition: + if val == nil { + return + } + e, ok := val.(string) + if !ok { + c.addErr(v.Loc, "VariablesOfCorrectType", "Variable \"%s\" has invalid type %T.\nExpected type \"%s\", found %v.", v.Name.Name, val, t, val) + return + } + for _, option := range t.EnumValuesDefinition { + if option.EnumValue == e { + return + } + } + c.addErr(v.Loc, "VariablesOfCorrectType", "Variable \"%s\" has invalid value %s.\nExpected type \"%s\", found %s.", v.Name.Name, e, t, e) + case *types.InputObject: + if val == nil { + return + } + in, ok := val.(map[string]interface{}) + if !ok { + c.addErr(v.Loc, "VariablesOfCorrectType", "Variable \"%s\" has invalid type %T.\nExpected type \"%s\", found %s.", v.Name.Name, val, t, val) + return + } + for _, f := range t.Values { + fieldVal := in[f.Name.Name] + validateValue(c, f, fieldVal, f.Type) + } + } +} + +// validates the query doesn't go deeper than maxDepth (if set). Returns whether +// or not query validated max depth to avoid excessive recursion. +// +// The visited map is necessary to ensure that max depth validation does not get stuck in cyclical +// fragment spreads. +func validateMaxDepth(c *opContext, sels []types.Selection, visited map[*types.FragmentDefinition]struct{}, depth int) bool { + // maxDepth checking is turned off when maxDepth is 0 + if c.maxDepth == 0 { + return false + } + + exceededMaxDepth := false + if visited == nil { + visited = map[*types.FragmentDefinition]struct{}{} + } + + for _, sel := range sels { + switch sel := sel.(type) { + case *types.Field: + if depth > c.maxDepth { + exceededMaxDepth = true + c.addErr(sel.Alias.Loc, "MaxDepthExceeded", "Field %q has depth %d that exceeds max depth %d", sel.Name.Name, depth, c.maxDepth) + continue + } + exceededMaxDepth = exceededMaxDepth || validateMaxDepth(c, sel.SelectionSet, visited, depth+1) + + case *types.InlineFragment: + // Depth is not checked because inline fragments resolve to other fields which are checked. + // Depth is not incremented because inline fragments have the same depth as neighboring fields + exceededMaxDepth = exceededMaxDepth || validateMaxDepth(c, sel.Selections, visited, depth) + case *types.FragmentSpread: + // Depth is not checked because fragments resolve to other fields which are checked. + frag := c.doc.Fragments.Get(sel.Name.Name) + if frag == nil { + // In case of unknown fragment (invalid request), ignore max depth evaluation + c.addErr(sel.Loc, "MaxDepthEvaluationError", "Unknown fragment %q. Unable to evaluate depth.", sel.Name.Name) + continue + } + + if _, ok := visited[frag]; ok { + // we've already seen this fragment, don't check depth again. + continue + } + visited[frag] = struct{}{} + + // Depth is not incremented because fragments have the same depth as surrounding fields + exceededMaxDepth = exceededMaxDepth || validateMaxDepth(c, frag.Selections, visited, depth) + } + } + + return exceededMaxDepth +} + +func validateSelectionSet(c *opContext, sels []types.Selection, t types.NamedType) { + for _, sel := range sels { + validateSelection(c, sel, t) + } + + for i, a := range sels { + for _, b := range sels[i+1:] { + c.validateOverlap(a, b, nil, nil) + } + } +} + +func validateSelection(c *opContext, sel types.Selection, t types.NamedType) { + switch sel := sel.(type) { + case *types.Field: + validateDirectives(c, "FIELD", sel.Directives) + + fieldName := sel.Name.Name + var f *types.FieldDefinition + switch fieldName { + case "__typename": + f = &types.FieldDefinition{ + Name: "__typename", + Type: c.schema.Types["String"], + } + case "__schema": + f = &types.FieldDefinition{ + Name: "__schema", + Type: c.schema.Types["__Schema"], + } + case "__type": + f = &types.FieldDefinition{ + Name: "__type", + Arguments: types.ArgumentsDefinition{ + &types.InputValueDefinition{ + Name: types.Ident{Name: "name"}, + Type: &types.NonNull{OfType: c.schema.Types["String"]}, + }, + }, + Type: c.schema.Types["__Type"], + } + default: + f = fields(t).Get(fieldName) + if f == nil && t != nil { + suggestion := makeSuggestion("Did you mean", fields(t).Names(), fieldName) + c.addErr(sel.Alias.Loc, "FieldsOnCorrectType", "Cannot query field %q on type %q.%s", fieldName, t, suggestion) + } + } + c.fieldMap[sel] = fieldInfo{sf: f, parent: t} + + validateArgumentLiterals(c, sel.Arguments) + if f != nil { + validateArgumentTypes(c, sel.Arguments, f.Arguments, sel.Alias.Loc, + func() string { return fmt.Sprintf("field %q of type %q", fieldName, t) }, + func() string { return fmt.Sprintf("Field %q", fieldName) }, + ) + } + + var ft types.Type + if f != nil { + ft = f.Type + sf := hasSubfields(ft) + if sf && sel.SelectionSet == nil { + c.addErr(sel.Alias.Loc, "ScalarLeafs", "Field %q of type %q must have a selection of subfields. Did you mean \"%s { ... }\"?", fieldName, ft, fieldName) + } + if !sf && sel.SelectionSet != nil { + c.addErr(sel.SelectionSetLoc, "ScalarLeafs", "Field %q must not have a selection since type %q has no subfields.", fieldName, ft) + } + } + if sel.SelectionSet != nil { + validateSelectionSet(c, sel.SelectionSet, unwrapType(ft)) + } + + case *types.InlineFragment: + validateDirectives(c, "INLINE_FRAGMENT", sel.Directives) + if sel.On.Name != "" { + fragTyp := unwrapType(resolveType(c.context, &sel.On)) + if fragTyp != nil && !compatible(t, fragTyp) { + c.addErr(sel.Loc, "PossibleFragmentSpreads", "Fragment cannot be spread here as objects of type %q can never be of type %q.", t, fragTyp) + } + t = fragTyp + // continue even if t is nil + } + if t != nil && !canBeFragment(t) { + c.addErr(sel.On.Loc, "FragmentsOnCompositeTypes", "Fragment cannot condition on non composite type %q.", t) + return + } + validateSelectionSet(c, sel.Selections, unwrapType(t)) + + case *types.FragmentSpread: + validateDirectives(c, "FRAGMENT_SPREAD", sel.Directives) + frag := c.doc.Fragments.Get(sel.Name.Name) + if frag == nil { + c.addErr(sel.Name.Loc, "KnownFragmentNames", "Unknown fragment %q.", sel.Name.Name) + return + } + fragTyp := c.schema.Types[frag.On.Name] + if !compatible(t, fragTyp) { + c.addErr(sel.Loc, "PossibleFragmentSpreads", "Fragment %q cannot be spread here as objects of type %q can never be of type %q.", frag.Name.Name, t, fragTyp) + } + + default: + panic("unreachable") + } +} + +func compatible(a, b types.Type) bool { + for _, pta := range possibleTypes(a) { + for _, ptb := range possibleTypes(b) { + if pta == ptb { + return true + } + } + } + return false +} + +func possibleTypes(t types.Type) []*types.ObjectTypeDefinition { + switch t := t.(type) { + case *types.ObjectTypeDefinition: + return []*types.ObjectTypeDefinition{t} + case *types.InterfaceTypeDefinition: + return t.PossibleTypes + case *types.Union: + return t.UnionMemberTypes + default: + return nil + } +} + +func markUsedFragments(c *context, sels []types.Selection, fragUsed map[*types.FragmentDefinition]struct{}) { + for _, sel := range sels { + switch sel := sel.(type) { + case *types.Field: + if sel.SelectionSet != nil { + markUsedFragments(c, sel.SelectionSet, fragUsed) + } + + case *types.InlineFragment: + markUsedFragments(c, sel.Selections, fragUsed) + + case *types.FragmentSpread: + frag := c.doc.Fragments.Get(sel.Name.Name) + if frag == nil { + return + } + + if _, ok := fragUsed[frag]; ok { + continue + } + + fragUsed[frag] = struct{}{} + markUsedFragments(c, frag.Selections, fragUsed) + + default: + panic("unreachable") + } + } +} + +func detectFragmentCycle(c *context, sels []types.Selection, fragVisited map[*types.FragmentDefinition]struct{}, spreadPath []*types.FragmentSpread, spreadPathIndex map[string]int) { + for _, sel := range sels { + detectFragmentCycleSel(c, sel, fragVisited, spreadPath, spreadPathIndex) + } +} + +func detectFragmentCycleSel(c *context, sel types.Selection, fragVisited map[*types.FragmentDefinition]struct{}, spreadPath []*types.FragmentSpread, spreadPathIndex map[string]int) { + switch sel := sel.(type) { + case *types.Field: + if sel.SelectionSet != nil { + detectFragmentCycle(c, sel.SelectionSet, fragVisited, spreadPath, spreadPathIndex) + } + + case *types.InlineFragment: + detectFragmentCycle(c, sel.Selections, fragVisited, spreadPath, spreadPathIndex) + + case *types.FragmentSpread: + frag := c.doc.Fragments.Get(sel.Name.Name) + if frag == nil { + return + } + + spreadPath = append(spreadPath, sel) + if i, ok := spreadPathIndex[frag.Name.Name]; ok { + cyclePath := spreadPath[i:] + via := "" + if len(cyclePath) > 1 { + names := make([]string, len(cyclePath)-1) + for i, frag := range cyclePath[:len(cyclePath)-1] { + names[i] = frag.Name.Name + } + via = " via " + strings.Join(names, ", ") + } + + locs := make([]errors.Location, len(cyclePath)) + for i, frag := range cyclePath { + locs[i] = frag.Loc + } + c.addErrMultiLoc(locs, "NoFragmentCycles", "Cannot spread fragment %q within itself%s.", frag.Name.Name, via) + return + } + + if _, ok := fragVisited[frag]; ok { + return + } + fragVisited[frag] = struct{}{} + + spreadPathIndex[frag.Name.Name] = len(spreadPath) + detectFragmentCycle(c, frag.Selections, fragVisited, spreadPath, spreadPathIndex) + delete(spreadPathIndex, frag.Name.Name) + + default: + panic("unreachable") + } +} + +func (c *context) validateOverlap(a, b types.Selection, reasons *[]string, locs *[]errors.Location) { + if a == b { + return + } + + if _, ok := c.overlapValidated[selectionPair{a, b}]; ok { + return + } + c.overlapValidated[selectionPair{a, b}] = struct{}{} + c.overlapValidated[selectionPair{b, a}] = struct{}{} + + switch a := a.(type) { + case *types.Field: + switch b := b.(type) { + case *types.Field: + if b.Alias.Loc.Before(a.Alias.Loc) { + a, b = b, a + } + if reasons2, locs2 := c.validateFieldOverlap(a, b); len(reasons2) != 0 { + locs2 = append(locs2, a.Alias.Loc, b.Alias.Loc) + if reasons == nil { + c.addErrMultiLoc(locs2, "OverlappingFieldsCanBeMerged", "Fields %q conflict because %s. Use different aliases on the fields to fetch both if this was intentional.", a.Alias.Name, strings.Join(reasons2, " and ")) + return + } + for _, r := range reasons2 { + *reasons = append(*reasons, fmt.Sprintf("subfields %q conflict because %s", a.Alias.Name, r)) + } + *locs = append(*locs, locs2...) + } + + case *types.InlineFragment: + for _, sel := range b.Selections { + c.validateOverlap(a, sel, reasons, locs) + } + + case *types.FragmentSpread: + if frag := c.doc.Fragments.Get(b.Name.Name); frag != nil { + for _, sel := range frag.Selections { + c.validateOverlap(a, sel, reasons, locs) + } + } + + default: + panic("unreachable") + } + + case *types.InlineFragment: + for _, sel := range a.Selections { + c.validateOverlap(sel, b, reasons, locs) + } + + case *types.FragmentSpread: + if frag := c.doc.Fragments.Get(a.Name.Name); frag != nil { + for _, sel := range frag.Selections { + c.validateOverlap(sel, b, reasons, locs) + } + } + + default: + panic("unreachable") + } +} + +func (c *context) validateFieldOverlap(a, b *types.Field) ([]string, []errors.Location) { + if a.Alias.Name != b.Alias.Name { + return nil, nil + } + + if asf := c.fieldMap[a].sf; asf != nil { + if bsf := c.fieldMap[b].sf; bsf != nil { + if !typesCompatible(asf.Type, bsf.Type) { + return []string{fmt.Sprintf("they return conflicting types %s and %s", asf.Type, bsf.Type)}, nil + } + } + } + + at := c.fieldMap[a].parent + bt := c.fieldMap[b].parent + if at == nil || bt == nil || at == bt { + if a.Name.Name != b.Name.Name { + return []string{fmt.Sprintf("%s and %s are different fields", a.Name.Name, b.Name.Name)}, nil + } + + if argumentsConflict(a.Arguments, b.Arguments) { + return []string{"they have differing arguments"}, nil + } + } + + var reasons []string + var locs []errors.Location + for _, a2 := range a.SelectionSet { + for _, b2 := range b.SelectionSet { + c.validateOverlap(a2, b2, &reasons, &locs) + } + } + return reasons, locs +} + +func argumentsConflict(a, b types.ArgumentList) bool { + if len(a) != len(b) { + return true + } + for _, argA := range a { + valB, ok := b.Get(argA.Name.Name) + if !ok || !reflect.DeepEqual(argA.Value.Deserialize(nil), valB.Deserialize(nil)) { + return true + } + } + return false +} + +func fields(t types.Type) types.FieldsDefinition { + switch t := t.(type) { + case *types.ObjectTypeDefinition: + return t.Fields + case *types.InterfaceTypeDefinition: + return t.Fields + default: + return nil + } +} + +func unwrapType(t types.Type) types.NamedType { + if t == nil { + return nil + } + for { + switch t2 := t.(type) { + case types.NamedType: + return t2 + case *types.List: + t = t2.OfType + case *types.NonNull: + t = t2.OfType + default: + panic("unreachable") + } + } +} + +func resolveType(c *context, t types.Type) types.Type { + t2, err := common.ResolveType(t, c.schema.Resolve) + if err != nil { + c.errs = append(c.errs, err) + } + return t2 +} + +func validateDirectives(c *opContext, loc string, directives types.DirectiveList) { + directiveNames := make(nameSet) + for _, d := range directives { + dirName := d.Name.Name + validateNameCustomMsg(c.context, directiveNames, d.Name, "UniqueDirectivesPerLocation", func() string { + return fmt.Sprintf("The directive %q can only be used once at this location.", dirName) + }) + + validateArgumentLiterals(c, d.Arguments) + + dd, ok := c.schema.Directives[dirName] + if !ok { + c.addErr(d.Name.Loc, "KnownDirectives", "Unknown directive %q.", dirName) + continue + } + + locOK := false + for _, allowedLoc := range dd.Locations { + if loc == allowedLoc { + locOK = true + break + } + } + if !locOK { + c.addErr(d.Name.Loc, "KnownDirectives", "Directive %q may not be used on %s.", dirName, loc) + } + + validateArgumentTypes(c, d.Arguments, dd.Arguments, d.Name.Loc, + func() string { return fmt.Sprintf("directive %q", "@"+dirName) }, + func() string { return fmt.Sprintf("Directive %q", "@"+dirName) }, + ) + } +} + +func validateName(c *context, set nameSet, name types.Ident, rule string, kind string) { + validateNameCustomMsg(c, set, name, rule, func() string { + return fmt.Sprintf("There can be only one %s named %q.", kind, name.Name) + }) +} + +func validateNameCustomMsg(c *context, set nameSet, name types.Ident, rule string, msg func() string) { + if loc, ok := set[name.Name]; ok { + c.addErrMultiLoc([]errors.Location{loc, name.Loc}, rule, msg()) + return + } + set[name.Name] = name.Loc +} + +func validateArgumentTypes(c *opContext, args types.ArgumentList, argDecls types.ArgumentsDefinition, loc errors.Location, owner1, owner2 func() string) { + for _, selArg := range args { + arg := argDecls.Get(selArg.Name.Name) + if arg == nil { + c.addErr(selArg.Name.Loc, "KnownArgumentNames", "Unknown argument %q on %s.", selArg.Name.Name, owner1()) + continue + } + value := selArg.Value + if ok, reason := validateValueType(c, value, arg.Type); !ok { + c.addErr(value.Location(), "ArgumentsOfCorrectType", "Argument %q has invalid value %s.\n%s", arg.Name.Name, value, reason) + } + } + for _, decl := range argDecls { + if _, ok := decl.Type.(*types.NonNull); ok { + if _, ok := args.Get(decl.Name.Name); !ok { + c.addErr(loc, "ProvidedNonNullArguments", "%s argument %q of type %q is required but not provided.", owner2(), decl.Name.Name, decl.Type) + } + } + } +} + +func validateArgumentLiterals(c *opContext, args types.ArgumentList) { + argNames := make(nameSet) + for _, arg := range args { + validateName(c.context, argNames, arg.Name, "UniqueArgumentNames", "argument") + validateLiteral(c, arg.Value) + } +} + +func validateLiteral(c *opContext, l types.Value) { + switch l := l.(type) { + case *types.ObjectValue: + fieldNames := make(nameSet) + for _, f := range l.Fields { + validateName(c.context, fieldNames, f.Name, "UniqueInputFieldNames", "input field") + validateLiteral(c, f.Value) + } + case *types.ListValue: + for _, entry := range l.Values { + validateLiteral(c, entry) + } + case *types.Variable: + for _, op := range c.ops { + v := op.Vars.Get(l.Name) + if v == nil { + byOp := "" + if op.Name.Name != "" { + byOp = fmt.Sprintf(" by operation %q", op.Name.Name) + } + c.opErrs[op] = append(c.opErrs[op], &errors.QueryError{ + Message: fmt.Sprintf("Variable %q is not defined%s.", "$"+l.Name, byOp), + Locations: []errors.Location{l.Loc, op.Loc}, + Rule: "NoUndefinedVariables", + }) + continue + } + validateValueType(c, l, resolveType(c.context, v.Type)) + c.usedVars[op][v] = struct{}{} + } + } +} + +func validateValueType(c *opContext, v types.Value, t types.Type) (bool, string) { + if v, ok := v.(*types.Variable); ok { + for _, op := range c.ops { + if v2 := op.Vars.Get(v.Name); v2 != nil { + t2, err := common.ResolveType(v2.Type, c.schema.Resolve) + if _, ok := t2.(*types.NonNull); !ok && v2.Default != nil { + t2 = &types.NonNull{OfType: t2} + } + if err == nil && !typeCanBeUsedAs(t2, t) { + c.addErrMultiLoc([]errors.Location{v2.Loc, v.Loc}, "VariablesInAllowedPosition", "Variable %q of type %q used in position expecting type %q.", "$"+v.Name, t2, t) + } + } + } + return true, "" + } + + if nn, ok := t.(*types.NonNull); ok { + if isNull(v) { + return false, fmt.Sprintf("Expected %q, found null.", t) + } + t = nn.OfType + } + if isNull(v) { + return true, "" + } + + switch t := t.(type) { + case *types.ScalarTypeDefinition, *types.EnumTypeDefinition: + if lit, ok := v.(*types.PrimitiveValue); ok { + if validateBasicLit(lit, t) { + return true, "" + } + return false, fmt.Sprintf("Expected type %q, found %s.", t, v) + } + return true, "" + + case *types.List: + list, ok := v.(*types.ListValue) + if !ok { + return validateValueType(c, v, t.OfType) // single value instead of list + } + for i, entry := range list.Values { + if ok, reason := validateValueType(c, entry, t.OfType); !ok { + return false, fmt.Sprintf("In element #%d: %s", i, reason) + } + } + return true, "" + + case *types.InputObject: + v, ok := v.(*types.ObjectValue) + if !ok { + return false, fmt.Sprintf("Expected %q, found not an object.", t) + } + for _, f := range v.Fields { + name := f.Name.Name + iv := t.Values.Get(name) + if iv == nil { + return false, fmt.Sprintf("In field %q: Unknown field.", name) + } + if ok, reason := validateValueType(c, f.Value, iv.Type); !ok { + return false, fmt.Sprintf("In field %q: %s", name, reason) + } + } + for _, iv := range t.Values { + found := false + for _, f := range v.Fields { + if f.Name.Name == iv.Name.Name { + found = true + break + } + } + if !found { + if _, ok := iv.Type.(*types.NonNull); ok && iv.Default == nil { + return false, fmt.Sprintf("In field %q: Expected %q, found null.", iv.Name.Name, iv.Type) + } + } + } + return true, "" + } + + return false, fmt.Sprintf("Expected type %q, found %s.", t, v) +} + +func validateBasicLit(v *types.PrimitiveValue, t types.Type) bool { + switch t := t.(type) { + case *types.ScalarTypeDefinition: + switch t.Name { + case "Int": + if v.Type != scanner.Int { + return false + } + f, err := strconv.ParseFloat(v.Text, 64) + if err != nil { + panic(err) + } + return f >= math.MinInt32 && f <= math.MaxInt32 + case "Float": + return v.Type == scanner.Int || v.Type == scanner.Float + case "String": + return v.Type == scanner.String + case "Boolean": + return v.Type == scanner.Ident && (v.Text == "true" || v.Text == "false") + case "ID": + return v.Type == scanner.Int || v.Type == scanner.String + default: + //TODO: Type-check against expected type by Unmarshalling + return true + } + + case *types.EnumTypeDefinition: + if v.Type != scanner.Ident { + return false + } + for _, option := range t.EnumValuesDefinition { + if option.EnumValue == v.Text { + return true + } + } + return false + } + + return false +} + +func canBeFragment(t types.Type) bool { + switch t.(type) { + case *types.ObjectTypeDefinition, *types.InterfaceTypeDefinition, *types.Union: + return true + default: + return false + } +} + +func canBeInput(t types.Type) bool { + switch t := t.(type) { + case *types.InputObject, *types.ScalarTypeDefinition, *types.EnumTypeDefinition: + return true + case *types.List: + return canBeInput(t.OfType) + case *types.NonNull: + return canBeInput(t.OfType) + default: + return false + } +} + +func hasSubfields(t types.Type) bool { + switch t := t.(type) { + case *types.ObjectTypeDefinition, *types.InterfaceTypeDefinition, *types.Union: + return true + case *types.List: + return hasSubfields(t.OfType) + case *types.NonNull: + return hasSubfields(t.OfType) + default: + return false + } +} + +func isLeaf(t types.Type) bool { + switch t.(type) { + case *types.ScalarTypeDefinition, *types.EnumTypeDefinition: + return true + default: + return false + } +} + +func isNull(lit interface{}) bool { + _, ok := lit.(*types.NullValue) + return ok +} + +func typesCompatible(a, b types.Type) bool { + al, aIsList := a.(*types.List) + bl, bIsList := b.(*types.List) + if aIsList || bIsList { + return aIsList && bIsList && typesCompatible(al.OfType, bl.OfType) + } + + ann, aIsNN := a.(*types.NonNull) + bnn, bIsNN := b.(*types.NonNull) + if aIsNN || bIsNN { + return aIsNN && bIsNN && typesCompatible(ann.OfType, bnn.OfType) + } + + if isLeaf(a) || isLeaf(b) { + return a == b + } + + return true +} + +func typeCanBeUsedAs(t, as types.Type) bool { + nnT, okT := t.(*types.NonNull) + if okT { + t = nnT.OfType + } + + nnAs, okAs := as.(*types.NonNull) + if okAs { + as = nnAs.OfType + if !okT { + return false // nullable can not be used as non-null + } + } + + if t == as { + return true + } + + if lT, ok := t.(*types.List); ok { + if lAs, ok := as.(*types.List); ok { + return typeCanBeUsedAs(lT.OfType, lAs.OfType) + } + } + return false +} diff --git a/vendor/github.com/graph-gophers/graphql-go/introspection.go b/vendor/github.com/graph-gophers/graphql-go/introspection.go new file mode 100644 index 00000000..6877bcaf --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/introspection.go @@ -0,0 +1,118 @@ +package graphql + +import ( + "context" + "encoding/json" + + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/introspection" +) + +// Inspect allows inspection of the given schema. +func (s *Schema) Inspect() *introspection.Schema { + return introspection.WrapSchema(s.schema) +} + +// ToJSON encodes the schema in a JSON format used by tools like Relay. +func (s *Schema) ToJSON() ([]byte, error) { + result := s.exec(context.Background(), introspectionQuery, "", nil, &resolvable.Schema{ + Meta: s.res.Meta, + Query: &resolvable.Object{}, + Schema: *s.schema, + }) + if len(result.Errors) != 0 { + panic(result.Errors[0]) + } + return json.MarshalIndent(result.Data, "", "\t") +} + +var introspectionQuery = ` + query { + __schema { + queryType { name } + mutationType { name } + subscriptionType { name } + types { + ...FullType + } + directives { + name + description + locations + args { + ...InputValue + } + } + } + } + fragment FullType on __Type { + kind + name + description + fields(includeDeprecated: true) { + name + description + args { + ...InputValue + } + type { + ...TypeRef + } + isDeprecated + deprecationReason + } + inputFields { + ...InputValue + } + interfaces { + ...TypeRef + } + enumValues(includeDeprecated: true) { + name + description + isDeprecated + deprecationReason + } + possibleTypes { + ...TypeRef + } + } + fragment InputValue on __InputValue { + name + description + type { ...TypeRef } + defaultValue + } + fragment TypeRef on __Type { + kind + name + ofType { + kind + name + ofType { + kind + name + ofType { + kind + name + ofType { + kind + name + ofType { + kind + name + ofType { + kind + name + ofType { + kind + name + } + } + } + } + } + } + } + } +` diff --git a/vendor/github.com/graph-gophers/graphql-go/introspection/introspection.go b/vendor/github.com/graph-gophers/graphql-go/introspection/introspection.go new file mode 100644 index 00000000..a0a2fa9b --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/introspection/introspection.go @@ -0,0 +1,312 @@ +package introspection + +import ( + "sort" + + "github.com/graph-gophers/graphql-go/types" +) + +type Schema struct { + schema *types.Schema +} + +// WrapSchema is only used internally. +func WrapSchema(schema *types.Schema) *Schema { + return &Schema{schema} +} + +func (r *Schema) Types() []*Type { + var names []string + for name := range r.schema.Types { + names = append(names, name) + } + sort.Strings(names) + + l := make([]*Type, len(names)) + for i, name := range names { + l[i] = &Type{r.schema.Types[name]} + } + return l +} + +func (r *Schema) Directives() []*Directive { + var names []string + for name := range r.schema.Directives { + names = append(names, name) + } + sort.Strings(names) + + l := make([]*Directive, len(names)) + for i, name := range names { + l[i] = &Directive{r.schema.Directives[name]} + } + return l +} + +func (r *Schema) QueryType() *Type { + t, ok := r.schema.EntryPoints["query"] + if !ok { + return nil + } + return &Type{t} +} + +func (r *Schema) MutationType() *Type { + t, ok := r.schema.EntryPoints["mutation"] + if !ok { + return nil + } + return &Type{t} +} + +func (r *Schema) SubscriptionType() *Type { + t, ok := r.schema.EntryPoints["subscription"] + if !ok { + return nil + } + return &Type{t} +} + +type Type struct { + typ types.Type +} + +// WrapType is only used internally. +func WrapType(typ types.Type) *Type { + return &Type{typ} +} + +func (r *Type) Kind() string { + return r.typ.Kind() +} + +func (r *Type) Name() *string { + if named, ok := r.typ.(types.NamedType); ok { + name := named.TypeName() + return &name + } + return nil +} + +func (r *Type) Description() *string { + if named, ok := r.typ.(types.NamedType); ok { + desc := named.Description() + if desc == "" { + return nil + } + return &desc + } + return nil +} + +func (r *Type) Fields(args *struct{ IncludeDeprecated bool }) *[]*Field { + var fields types.FieldsDefinition + switch t := r.typ.(type) { + case *types.ObjectTypeDefinition: + fields = t.Fields + case *types.InterfaceTypeDefinition: + fields = t.Fields + default: + return nil + } + + var l []*Field + for _, f := range fields { + if d := f.Directives.Get("deprecated"); d == nil || args.IncludeDeprecated { + l = append(l, &Field{field: f}) + } + } + return &l +} + +func (r *Type) Interfaces() *[]*Type { + t, ok := r.typ.(*types.ObjectTypeDefinition) + if !ok { + return nil + } + + l := make([]*Type, len(t.Interfaces)) + for i, intf := range t.Interfaces { + l[i] = &Type{intf} + } + return &l +} + +func (r *Type) PossibleTypes() *[]*Type { + var possibleTypes []*types.ObjectTypeDefinition + switch t := r.typ.(type) { + case *types.InterfaceTypeDefinition: + possibleTypes = t.PossibleTypes + case *types.Union: + possibleTypes = t.UnionMemberTypes + default: + return nil + } + + l := make([]*Type, len(possibleTypes)) + for i, intf := range possibleTypes { + l[i] = &Type{intf} + } + return &l +} + +func (r *Type) EnumValues(args *struct{ IncludeDeprecated bool }) *[]*EnumValue { + t, ok := r.typ.(*types.EnumTypeDefinition) + if !ok { + return nil + } + + var l []*EnumValue + for _, v := range t.EnumValuesDefinition { + if d := v.Directives.Get("deprecated"); d == nil || args.IncludeDeprecated { + l = append(l, &EnumValue{v}) + } + } + return &l +} + +func (r *Type) InputFields() *[]*InputValue { + t, ok := r.typ.(*types.InputObject) + if !ok { + return nil + } + + l := make([]*InputValue, len(t.Values)) + for i, v := range t.Values { + l[i] = &InputValue{v} + } + return &l +} + +func (r *Type) OfType() *Type { + switch t := r.typ.(type) { + case *types.List: + return &Type{t.OfType} + case *types.NonNull: + return &Type{t.OfType} + default: + return nil + } +} + +type Field struct { + field *types.FieldDefinition +} + +func (r *Field) Name() string { + return r.field.Name +} + +func (r *Field) Description() *string { + if r.field.Desc == "" { + return nil + } + return &r.field.Desc +} + +func (r *Field) Args() []*InputValue { + l := make([]*InputValue, len(r.field.Arguments)) + for i, v := range r.field.Arguments { + l[i] = &InputValue{v} + } + return l +} + +func (r *Field) Type() *Type { + return &Type{r.field.Type} +} + +func (r *Field) IsDeprecated() bool { + return r.field.Directives.Get("deprecated") != nil +} + +func (r *Field) DeprecationReason() *string { + d := r.field.Directives.Get("deprecated") + if d == nil { + return nil + } + reason := d.Arguments.MustGet("reason").Deserialize(nil).(string) + return &reason +} + +type InputValue struct { + value *types.InputValueDefinition +} + +func (r *InputValue) Name() string { + return r.value.Name.Name +} + +func (r *InputValue) Description() *string { + if r.value.Desc == "" { + return nil + } + return &r.value.Desc +} + +func (r *InputValue) Type() *Type { + return &Type{r.value.Type} +} + +func (r *InputValue) DefaultValue() *string { + if r.value.Default == nil { + return nil + } + s := r.value.Default.String() + return &s +} + +type EnumValue struct { + value *types.EnumValueDefinition +} + +func (r *EnumValue) Name() string { + return r.value.EnumValue +} + +func (r *EnumValue) Description() *string { + if r.value.Desc == "" { + return nil + } + return &r.value.Desc +} + +func (r *EnumValue) IsDeprecated() bool { + return r.value.Directives.Get("deprecated") != nil +} + +func (r *EnumValue) DeprecationReason() *string { + d := r.value.Directives.Get("deprecated") + if d == nil { + return nil + } + reason := d.Arguments.MustGet("reason").Deserialize(nil).(string) + return &reason +} + +type Directive struct { + directive *types.DirectiveDefinition +} + +func (r *Directive) Name() string { + return r.directive.Name +} + +func (r *Directive) Description() *string { + if r.directive.Desc == "" { + return nil + } + return &r.directive.Desc +} + +func (r *Directive) Locations() []string { + return r.directive.Locations +} + +func (r *Directive) Args() []*InputValue { + l := make([]*InputValue, len(r.directive.Arguments)) + for i, v := range r.directive.Arguments { + l[i] = &InputValue{v} + } + return l +} diff --git a/vendor/github.com/graph-gophers/graphql-go/log/log.go b/vendor/github.com/graph-gophers/graphql-go/log/log.go new file mode 100644 index 00000000..bdada874 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/log/log.go @@ -0,0 +1,23 @@ +package log + +import ( + "context" + "log" + "runtime" +) + +// Logger is the interface used to log panics that occur during query execution. It is settable via graphql.ParseSchema +type Logger interface { + LogPanic(ctx context.Context, value interface{}) +} + +// DefaultLogger is the default logger used to log panics that occur during query execution +type DefaultLogger struct{} + +// LogPanic is used to log recovered panic values that occur during query execution +func (l *DefaultLogger) LogPanic(ctx context.Context, value interface{}) { + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + log.Printf("graphql: panic occurred: %v\n%s\ncontext: %v", value, buf, ctx) +} diff --git a/vendor/github.com/graph-gophers/graphql-go/nullable_types.go b/vendor/github.com/graph-gophers/graphql-go/nullable_types.go new file mode 100644 index 00000000..fa5bbfd6 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/nullable_types.go @@ -0,0 +1,166 @@ +package graphql + +import ( + "fmt" + "math" +) + +// NullString is a string that can be null. Use it in input structs to +// differentiate a value explicitly set to null from an omitted value. +// When the value is defined (either null or a value) Set is true. +type NullString struct { + Value *string + Set bool +} + +func (NullString) ImplementsGraphQLType(name string) bool { + return name == "String" +} + +func (s *NullString) UnmarshalGraphQL(input interface{}) error { + s.Set = true + + if input == nil { + return nil + } + + switch v := input.(type) { + case string: + s.Value = &v + return nil + default: + return fmt.Errorf("wrong type for String: %T", v) + } +} + +func (s *NullString) Nullable() {} + +// NullBool is a string that can be null. Use it in input structs to +// differentiate a value explicitly set to null from an omitted value. +// When the value is defined (either null or a value) Set is true. +type NullBool struct { + Value *bool + Set bool +} + +func (NullBool) ImplementsGraphQLType(name string) bool { + return name == "Boolean" +} + +func (s *NullBool) UnmarshalGraphQL(input interface{}) error { + s.Set = true + + if input == nil { + return nil + } + + switch v := input.(type) { + case bool: + s.Value = &v + return nil + default: + return fmt.Errorf("wrong type for Boolean: %T", v) + } +} + +func (s *NullBool) Nullable() {} + +// NullInt is a string that can be null. Use it in input structs to +// differentiate a value explicitly set to null from an omitted value. +// When the value is defined (either null or a value) Set is true. +type NullInt struct { + Value *int32 + Set bool +} + +func (NullInt) ImplementsGraphQLType(name string) bool { + return name == "Int" +} + +func (s *NullInt) UnmarshalGraphQL(input interface{}) error { + s.Set = true + + if input == nil { + return nil + } + + switch v := input.(type) { + case int32: + s.Value = &v + return nil + case float64: + coerced := int32(v) + if v < math.MinInt32 || v > math.MaxInt32 || float64(coerced) != v { + return fmt.Errorf("not a 32-bit integer") + } + s.Value = &coerced + return nil + default: + return fmt.Errorf("wrong type for Int: %T", v) + } +} + +func (s *NullInt) Nullable() {} + +// NullFloat is a string that can be null. Use it in input structs to +// differentiate a value explicitly set to null from an omitted value. +// When the value is defined (either null or a value) Set is true. +type NullFloat struct { + Value *float64 + Set bool +} + +func (NullFloat) ImplementsGraphQLType(name string) bool { + return name == "Float" +} + +func (s *NullFloat) UnmarshalGraphQL(input interface{}) error { + s.Set = true + + if input == nil { + return nil + } + + switch v := input.(type) { + case float64: + s.Value = &v + return nil + case int32: + coerced := float64(v) + s.Value = &coerced + return nil + case int: + coerced := float64(v) + s.Value = &coerced + return nil + default: + return fmt.Errorf("wrong type for Float: %T", v) + } +} + +func (s *NullFloat) Nullable() {} + +// NullTime is a string that can be null. Use it in input structs to +// differentiate a value explicitly set to null from an omitted value. +// When the value is defined (either null or a value) Set is true. +type NullTime struct { + Value *Time + Set bool +} + +func (NullTime) ImplementsGraphQLType(name string) bool { + return name == "Time" +} + +func (s *NullTime) UnmarshalGraphQL(input interface{}) error { + s.Set = true + + if input == nil { + return nil + } + + s.Value = new(Time) + return s.Value.UnmarshalGraphQL(input) +} + +func (s *NullTime) Nullable() {} diff --git a/vendor/github.com/graph-gophers/graphql-go/subscriptions.go b/vendor/github.com/graph-gophers/graphql-go/subscriptions.go new file mode 100644 index 00000000..34064dc7 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/subscriptions.go @@ -0,0 +1,96 @@ +package graphql + +import ( + "context" + "errors" + + qerrors "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/internal/common" + "github.com/graph-gophers/graphql-go/internal/exec" + "github.com/graph-gophers/graphql-go/internal/exec/resolvable" + "github.com/graph-gophers/graphql-go/internal/exec/selected" + "github.com/graph-gophers/graphql-go/internal/query" + "github.com/graph-gophers/graphql-go/internal/validation" + "github.com/graph-gophers/graphql-go/introspection" +) + +// Subscribe returns a response channel for the given subscription with the schema's +// resolver. It returns an error if the schema was created without a resolver. +// If the context gets cancelled, the response channel will be closed and no +// further resolvers will be called. The context error will be returned as soon +// as possible (not immediately). +func (s *Schema) Subscribe(ctx context.Context, queryString string, operationName string, variables map[string]interface{}) (<-chan interface{}, error) { + if !s.res.Resolver.IsValid() { + return nil, errors.New("schema created without resolver, can not subscribe") + } + if _, ok := s.schema.EntryPoints["subscription"]; !ok { + return nil, errors.New("no subscriptions are offered by the schema") + } + return s.subscribe(ctx, queryString, operationName, variables, s.res), nil +} + +func (s *Schema) subscribe(ctx context.Context, queryString string, operationName string, variables map[string]interface{}, res *resolvable.Schema) <-chan interface{} { + doc, qErr := query.Parse(queryString) + if qErr != nil { + return sendAndReturnClosed(&Response{Errors: []*qerrors.QueryError{qErr}}) + } + + validationFinish := s.validationTracer.TraceValidation(ctx) + errs := validation.Validate(s.schema, doc, variables, s.maxDepth) + validationFinish(errs) + if len(errs) != 0 { + return sendAndReturnClosed(&Response{Errors: errs}) + } + + op, err := getOperation(doc, operationName) + if err != nil { + return sendAndReturnClosed(&Response{Errors: []*qerrors.QueryError{qerrors.Errorf("%s", err)}}) + } + + r := &exec.Request{ + Request: selected.Request{ + Doc: doc, + Vars: variables, + Schema: s.schema, + }, + Limiter: make(chan struct{}, s.maxParallelism), + Tracer: s.tracer, + Logger: s.logger, + PanicHandler: s.panicHandler, + SubscribeResolverTimeout: s.subscribeResolverTimeout, + } + varTypes := make(map[string]*introspection.Type) + for _, v := range op.Vars { + t, err := common.ResolveType(v.Type, s.schema.Resolve) + if err != nil { + return sendAndReturnClosed(&Response{Errors: []*qerrors.QueryError{err}}) + } + varTypes[v.Name.Name] = introspection.WrapType(t) + } + + if op.Type == query.Query || op.Type == query.Mutation { + data, errs := r.Execute(ctx, res, op) + return sendAndReturnClosed(&Response{Data: data, Errors: errs}) + } + + responses := r.Subscribe(ctx, res, op) + c := make(chan interface{}) + go func() { + for resp := range responses { + c <- &Response{ + Data: resp.Data, + Errors: resp.Errors, + } + } + close(c) + }() + + return c +} + +func sendAndReturnClosed(resp *Response) chan interface{} { + c := make(chan interface{}, 1) + c <- resp + close(c) + return c +} diff --git a/vendor/github.com/graph-gophers/graphql-go/time.go b/vendor/github.com/graph-gophers/graphql-go/time.go new file mode 100644 index 00000000..974287e7 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/time.go @@ -0,0 +1,64 @@ +package graphql + +import ( + "encoding/json" + "fmt" + "time" +) + +// Time is a custom GraphQL type to represent an instant in time. It has to be added to a schema +// via "scalar Time" since it is not a predeclared GraphQL type like "ID". +type Time struct { + time.Time +} + +// ImplementsGraphQLType maps this custom Go type +// to the graphql scalar type in the schema. +func (Time) ImplementsGraphQLType(name string) bool { + return name == "Time" +} + +// UnmarshalGraphQL is a custom unmarshaler for Time +// +// This function will be called whenever you use the +// time scalar as an input +func (t *Time) UnmarshalGraphQL(input interface{}) error { + switch input := input.(type) { + case time.Time: + t.Time = input + return nil + case string: + var err error + t.Time, err = time.Parse(time.RFC3339, input) + return err + case []byte: + var err error + t.Time, err = time.Parse(time.RFC3339, string(input)) + return err + case int32: + t.Time = time.Unix(int64(input), 0) + return nil + case int64: + if input >= 1e10 { + sec := input / 1e9 + nsec := input - (sec * 1e9) + t.Time = time.Unix(sec, nsec) + } else { + t.Time = time.Unix(input, 0) + } + return nil + case float64: + t.Time = time.Unix(int64(input), 0) + return nil + default: + return fmt.Errorf("wrong type for Time: %T", input) + } +} + +// MarshalJSON is a custom marshaler for Time +// +// This function will be called whenever you +// query for fields that use the Time type +func (t Time) MarshalJSON() ([]byte, error) { + return json.Marshal(t.Time) +} diff --git a/vendor/github.com/graph-gophers/graphql-go/trace/trace.go b/vendor/github.com/graph-gophers/graphql-go/trace/trace.go new file mode 100644 index 00000000..8d5d8a71 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/trace/trace.go @@ -0,0 +1,96 @@ +package trace + +import ( + "context" + "fmt" + + "github.com/graph-gophers/graphql-go/errors" + "github.com/graph-gophers/graphql-go/introspection" + opentracing "github.com/opentracing/opentracing-go" + "github.com/opentracing/opentracing-go/ext" + "github.com/opentracing/opentracing-go/log" +) + +type TraceQueryFinishFunc func([]*errors.QueryError) +type TraceFieldFinishFunc func(*errors.QueryError) + +type Tracer interface { + TraceQuery(ctx context.Context, queryString string, operationName string, variables map[string]interface{}, varTypes map[string]*introspection.Type) (context.Context, TraceQueryFinishFunc) + TraceField(ctx context.Context, label, typeName, fieldName string, trivial bool, args map[string]interface{}) (context.Context, TraceFieldFinishFunc) +} + +type OpenTracingTracer struct{} + +func (OpenTracingTracer) TraceQuery(ctx context.Context, queryString string, operationName string, variables map[string]interface{}, varTypes map[string]*introspection.Type) (context.Context, TraceQueryFinishFunc) { + span, spanCtx := opentracing.StartSpanFromContext(ctx, "GraphQL request") + span.SetTag("graphql.query", queryString) + + if operationName != "" { + span.SetTag("graphql.operationName", operationName) + } + + if len(variables) != 0 { + span.LogFields(log.Object("graphql.variables", variables)) + } + + return spanCtx, func(errs []*errors.QueryError) { + if len(errs) > 0 { + msg := errs[0].Error() + if len(errs) > 1 { + msg += fmt.Sprintf(" (and %d more errors)", len(errs)-1) + } + ext.Error.Set(span, true) + span.SetTag("graphql.error", msg) + } + span.Finish() + } +} + +func (OpenTracingTracer) TraceField(ctx context.Context, label, typeName, fieldName string, trivial bool, args map[string]interface{}) (context.Context, TraceFieldFinishFunc) { + if trivial { + return ctx, noop + } + + span, spanCtx := opentracing.StartSpanFromContext(ctx, label) + span.SetTag("graphql.type", typeName) + span.SetTag("graphql.field", fieldName) + for name, value := range args { + span.SetTag("graphql.args."+name, value) + } + + return spanCtx, func(err *errors.QueryError) { + if err != nil { + ext.Error.Set(span, true) + span.SetTag("graphql.error", err.Error()) + } + span.Finish() + } +} + +func (OpenTracingTracer) TraceValidation(ctx context.Context) TraceValidationFinishFunc { + span, _ := opentracing.StartSpanFromContext(ctx, "Validate Query") + + return func(errs []*errors.QueryError) { + if len(errs) > 0 { + msg := errs[0].Error() + if len(errs) > 1 { + msg += fmt.Sprintf(" (and %d more errors)", len(errs)-1) + } + ext.Error.Set(span, true) + span.SetTag("graphql.error", msg) + } + span.Finish() + } +} + +func noop(*errors.QueryError) {} + +type NoopTracer struct{} + +func (NoopTracer) TraceQuery(ctx context.Context, queryString string, operationName string, variables map[string]interface{}, varTypes map[string]*introspection.Type) (context.Context, TraceQueryFinishFunc) { + return ctx, func(errs []*errors.QueryError) {} +} + +func (NoopTracer) TraceField(ctx context.Context, label, typeName, fieldName string, trivial bool, args map[string]interface{}) (context.Context, TraceFieldFinishFunc) { + return ctx, func(err *errors.QueryError) {} +} diff --git a/vendor/github.com/graph-gophers/graphql-go/trace/validation_trace.go b/vendor/github.com/graph-gophers/graphql-go/trace/validation_trace.go new file mode 100644 index 00000000..bce7a9a4 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/trace/validation_trace.go @@ -0,0 +1,25 @@ +package trace + +import ( + "context" + + "github.com/graph-gophers/graphql-go/errors" +) + +type TraceValidationFinishFunc = TraceQueryFinishFunc + +// Deprecated: use ValidationTracerContext. +type ValidationTracer interface { + TraceValidation() TraceValidationFinishFunc +} + +type ValidationTracerContext interface { + TraceValidation(ctx context.Context) TraceValidationFinishFunc +} + +type NoopValidationTracer struct{} + +// Deprecated: use a Tracer which implements ValidationTracerContext. +func (NoopValidationTracer) TraceValidation() TraceValidationFinishFunc { + return func(errs []*errors.QueryError) {} +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/argument.go b/vendor/github.com/graph-gophers/graphql-go/types/argument.go new file mode 100644 index 00000000..b2681a28 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/argument.go @@ -0,0 +1,44 @@ +package types + +// Argument is a representation of the GraphQL Argument. +// +// https://spec.graphql.org/draft/#sec-Language.Arguments +type Argument struct { + Name Ident + Value Value +} + +// ArgumentList is a collection of GraphQL Arguments. +type ArgumentList []*Argument + +// Returns a Value in the ArgumentList by name. +func (l ArgumentList) Get(name string) (Value, bool) { + for _, arg := range l { + if arg.Name.Name == name { + return arg.Value, true + } + } + return nil, false +} + +// MustGet returns a Value in the ArgumentList by name. +// MustGet will panic if the argument name is not found in the ArgumentList. +func (l ArgumentList) MustGet(name string) Value { + value, ok := l.Get(name) + if !ok { + panic("argument not found") + } + return value +} + +type ArgumentsDefinition []*InputValueDefinition + +// Get returns an InputValueDefinition in the ArgumentsDefinition by name or nil if not found. +func (a ArgumentsDefinition) Get(name string) *InputValueDefinition { + for _, inputValue := range a { + if inputValue.Name.Name == name { + return inputValue + } + } + return nil +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/directive.go b/vendor/github.com/graph-gophers/graphql-go/types/directive.go new file mode 100644 index 00000000..0f8a4b99 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/directive.go @@ -0,0 +1,34 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// Directive is a representation of the GraphQL Directive. +// +// http://spec.graphql.org/draft/#sec-Language.Directives +type Directive struct { + Name Ident + Arguments ArgumentList +} + +// DirectiveDefinition is a representation of the GraphQL DirectiveDefinition. +// +// http://spec.graphql.org/draft/#sec-Type-System.Directives +type DirectiveDefinition struct { + Name string + Desc string + Locations []string + Arguments ArgumentsDefinition + Loc errors.Location +} + +type DirectiveList []*Directive + +// Returns the Directive in the DirectiveList by name or nil if not found. +func (l DirectiveList) Get(name string) *Directive { + for _, d := range l { + if d.Name.Name == name { + return d + } + } + return nil +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/doc.go b/vendor/github.com/graph-gophers/graphql-go/types/doc.go new file mode 100644 index 00000000..87caa60b --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/doc.go @@ -0,0 +1,9 @@ +/* + Package types represents all types from the GraphQL specification in code. + + + The names of the Go types, whenever possible, match 1:1 with the names from + the specification. + +*/ +package types diff --git a/vendor/github.com/graph-gophers/graphql-go/types/enum.go b/vendor/github.com/graph-gophers/graphql-go/types/enum.go new file mode 100644 index 00000000..b2c84caa --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/enum.go @@ -0,0 +1,32 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// EnumTypeDefinition defines a set of possible enum values. +// +// Like scalar types, an EnumTypeDefinition also represents a leaf value in a GraphQL type system. +// +// http://spec.graphql.org/draft/#sec-Enums +type EnumTypeDefinition struct { + Name string + EnumValuesDefinition []*EnumValueDefinition + Desc string + Directives DirectiveList + Loc errors.Location +} + +// EnumValueDefinition are unique values that may be serialized as a string: the name of the +// represented value. +// +// http://spec.graphql.org/draft/#EnumValueDefinition +type EnumValueDefinition struct { + EnumValue string + Directives DirectiveList + Desc string + Loc errors.Location +} + +func (*EnumTypeDefinition) Kind() string { return "ENUM" } +func (t *EnumTypeDefinition) String() string { return t.Name } +func (t *EnumTypeDefinition) TypeName() string { return t.Name } +func (t *EnumTypeDefinition) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/extension.go b/vendor/github.com/graph-gophers/graphql-go/types/extension.go new file mode 100644 index 00000000..b82ea670 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/extension.go @@ -0,0 +1,13 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// Extension type defines a GraphQL type extension. +// Schemas, Objects, Inputs and Scalars can be extended. +// +// https://spec.graphql.org/draft/#sec-Type-System-Extensions +type Extension struct { + Type NamedType + Directives DirectiveList + Loc errors.Location +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/field.go b/vendor/github.com/graph-gophers/graphql-go/types/field.go new file mode 100644 index 00000000..ea5bca5c --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/field.go @@ -0,0 +1,39 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// FieldDefinition is a representation of a GraphQL FieldDefinition. +// +// http://spec.graphql.org/draft/#FieldDefinition +type FieldDefinition struct { + Name string + Arguments ArgumentsDefinition + Type Type + Directives DirectiveList + Desc string + Loc errors.Location +} + +// FieldsDefinition is a list of an ObjectTypeDefinition's Fields. +// +// https://spec.graphql.org/draft/#FieldsDefinition +type FieldsDefinition []*FieldDefinition + +// Get returns a FieldDefinition in a FieldsDefinition by name or nil if not found. +func (l FieldsDefinition) Get(name string) *FieldDefinition { + for _, f := range l { + if f.Name == name { + return f + } + } + return nil +} + +// Names returns a slice of FieldDefinition names. +func (l FieldsDefinition) Names() []string { + names := make([]string, len(l)) + for i, f := range l { + names[i] = f.Name + } + return names +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/fragment.go b/vendor/github.com/graph-gophers/graphql-go/types/fragment.go new file mode 100644 index 00000000..606219ca --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/fragment.go @@ -0,0 +1,51 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +type Fragment struct { + On TypeName + Selections SelectionSet +} + +// InlineFragment is a representation of the GraphQL InlineFragment. +// +// http://spec.graphql.org/draft/#InlineFragment +type InlineFragment struct { + Fragment + Directives DirectiveList + Loc errors.Location +} + +// FragmentDefinition is a representation of the GraphQL FragmentDefinition. +// +// http://spec.graphql.org/draft/#FragmentDefinition +type FragmentDefinition struct { + Fragment + Name Ident + Directives DirectiveList + Loc errors.Location +} + +// FragmentSpread is a representation of the GraphQL FragmentSpread. +// +// http://spec.graphql.org/draft/#FragmentSpread +type FragmentSpread struct { + Name Ident + Directives DirectiveList + Loc errors.Location +} + +type FragmentList []*FragmentDefinition + +// Returns a FragmentDefinition by name or nil if not found. +func (l FragmentList) Get(name string) *FragmentDefinition { + for _, f := range l { + if f.Name.Name == name { + return f + } + } + return nil +} + +func (InlineFragment) isSelection() {} +func (FragmentSpread) isSelection() {} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/input.go b/vendor/github.com/graph-gophers/graphql-go/types/input.go new file mode 100644 index 00000000..c179bc3e --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/input.go @@ -0,0 +1,47 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// InputValueDefinition is a representation of the GraphQL InputValueDefinition. +// +// http://spec.graphql.org/draft/#InputValueDefinition +type InputValueDefinition struct { + Name Ident + Type Type + Default Value + Desc string + Directives DirectiveList + Loc errors.Location + TypeLoc errors.Location +} + +type InputValueDefinitionList []*InputValueDefinition + +// Returns an InputValueDefinition by name or nil if not found. +func (l InputValueDefinitionList) Get(name string) *InputValueDefinition { + for _, v := range l { + if v.Name.Name == name { + return v + } + } + return nil +} + +// InputObject types define a set of input fields; the input fields are either scalars, enums, or +// other input objects. +// +// This allows arguments to accept arbitrarily complex structs. +// +// http://spec.graphql.org/draft/#sec-Input-Objects +type InputObject struct { + Name string + Desc string + Values ArgumentsDefinition + Directives DirectiveList + Loc errors.Location +} + +func (*InputObject) Kind() string { return "INPUT_OBJECT" } +func (t *InputObject) String() string { return t.Name } +func (t *InputObject) TypeName() string { return t.Name } +func (t *InputObject) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/interface.go b/vendor/github.com/graph-gophers/graphql-go/types/interface.go new file mode 100644 index 00000000..e741e591 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/interface.go @@ -0,0 +1,25 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// InterfaceTypeDefinition recusrively defines list of named fields with their arguments via the +// implementation chain of interfaces. +// +// GraphQL objects can then implement these interfaces which requires that the object type will +// define all fields defined by those interfaces. +// +// http://spec.graphql.org/draft/#sec-Interfaces +type InterfaceTypeDefinition struct { + Name string + PossibleTypes []*ObjectTypeDefinition + Fields FieldsDefinition + Desc string + Directives DirectiveList + Loc errors.Location + Interfaces []*InterfaceTypeDefinition +} + +func (*InterfaceTypeDefinition) Kind() string { return "INTERFACE" } +func (t *InterfaceTypeDefinition) String() string { return t.Name } +func (t *InterfaceTypeDefinition) TypeName() string { return t.Name } +func (t *InterfaceTypeDefinition) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/object.go b/vendor/github.com/graph-gophers/graphql-go/types/object.go new file mode 100644 index 00000000..e65c79db --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/object.go @@ -0,0 +1,25 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// ObjectTypeDefinition represents a GraphQL ObjectTypeDefinition. +// +// type FooObject { +// foo: String +// } +// +// https://spec.graphql.org/draft/#sec-Objects +type ObjectTypeDefinition struct { + Name string + Interfaces []*InterfaceTypeDefinition + Fields FieldsDefinition + Desc string + Directives DirectiveList + InterfaceNames []string + Loc errors.Location +} + +func (*ObjectTypeDefinition) Kind() string { return "OBJECT" } +func (t *ObjectTypeDefinition) String() string { return t.Name } +func (t *ObjectTypeDefinition) TypeName() string { return t.Name } +func (t *ObjectTypeDefinition) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/query.go b/vendor/github.com/graph-gophers/graphql-go/types/query.go new file mode 100644 index 00000000..caca6ef4 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/query.go @@ -0,0 +1,62 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// ExecutableDefinition represents a set of operations or fragments that can be executed +// against a schema. +// +// http://spec.graphql.org/draft/#ExecutableDefinition +type ExecutableDefinition struct { + Operations OperationList + Fragments FragmentList +} + +// OperationDefinition represents a GraphQL Operation. +// +// https://spec.graphql.org/draft/#sec-Language.Operations +type OperationDefinition struct { + Type OperationType + Name Ident + Vars ArgumentsDefinition + Selections SelectionSet + Directives DirectiveList + Loc errors.Location +} + +type OperationType string + +// A Selection is a field requested in a GraphQL operation. +// +// http://spec.graphql.org/draft/#Selection +type Selection interface { + isSelection() +} + +// A SelectionSet represents a collection of Selections +// +// http://spec.graphql.org/draft/#sec-Selection-Sets +type SelectionSet []Selection + +// Field represents a field used in a query. +type Field struct { + Alias Ident + Name Ident + Arguments ArgumentList + Directives DirectiveList + SelectionSet SelectionSet + SelectionSetLoc errors.Location +} + +func (Field) isSelection() {} + +type OperationList []*OperationDefinition + +// Get returns an OperationDefinition by name or nil if not found. +func (l OperationList) Get(name string) *OperationDefinition { + for _, f := range l { + if f.Name.Name == name { + return f + } + } + return nil +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/scalar.go b/vendor/github.com/graph-gophers/graphql-go/types/scalar.go new file mode 100644 index 00000000..5bd529a8 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/scalar.go @@ -0,0 +1,22 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// ScalarTypeDefinition types represent primitive leaf values (e.g. a string or an integer) in a GraphQL type +// system. +// +// GraphQL responses take the form of a hierarchical tree; the leaves on these trees are GraphQL +// scalars. +// +// http://spec.graphql.org/draft/#sec-Scalars +type ScalarTypeDefinition struct { + Name string + Desc string + Directives DirectiveList + Loc errors.Location +} + +func (*ScalarTypeDefinition) Kind() string { return "SCALAR" } +func (t *ScalarTypeDefinition) String() string { return t.Name } +func (t *ScalarTypeDefinition) TypeName() string { return t.Name } +func (t *ScalarTypeDefinition) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/schema.go b/vendor/github.com/graph-gophers/graphql-go/types/schema.go new file mode 100644 index 00000000..06811a97 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/schema.go @@ -0,0 +1,42 @@ +package types + +// Schema represents a GraphQL service's collective type system capabilities. +// A schema is defined in terms of the types and directives it supports as well as the root +// operation types for each kind of operation: `query`, `mutation`, and `subscription`. +// +// For a more formal definition, read the relevant section in the specification: +// +// http://spec.graphql.org/draft/#sec-Schema +type Schema struct { + // EntryPoints determines the place in the type system where `query`, `mutation`, and + // `subscription` operations begin. + // + // http://spec.graphql.org/draft/#sec-Root-Operation-Types + // + EntryPoints map[string]NamedType + + // Types are the fundamental unit of any GraphQL schema. + // There are six kinds of named types, and two wrapping types. + // + // http://spec.graphql.org/draft/#sec-Types + Types map[string]NamedType + + // Directives are used to annotate various parts of a GraphQL document as an indicator that they + // should be evaluated differently by a validator, executor, or client tool such as a code + // generator. + // + // http://spec.graphql.org/#sec-Type-System.Directives + Directives map[string]*DirectiveDefinition + + UseFieldResolvers bool + + EntryPointNames map[string]string + Objects []*ObjectTypeDefinition + Unions []*Union + Enums []*EnumTypeDefinition + Extensions []*Extension +} + +func (s *Schema) Resolve(name string) Type { + return s.Types[name] +} diff --git a/vendor/github.com/graph-gophers/graphql-go/types/types.go b/vendor/github.com/graph-gophers/graphql-go/types/types.go new file mode 100644 index 00000000..df34d08a --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/types.go @@ -0,0 +1,63 @@ +package types + +import ( + "github.com/graph-gophers/graphql-go/errors" +) + +// TypeName is a base building block for GraphQL type references. +type TypeName struct { + Ident +} + +// NamedType represents a type with a name. +// +// http://spec.graphql.org/draft/#NamedType +type NamedType interface { + Type + TypeName() string + Description() string +} + +type Ident struct { + Name string + Loc errors.Location +} + +type Type interface { + // Kind returns one possible GraphQL type kind. A type kind must be + // valid as defined by the GraphQL spec. + // + // https://spec.graphql.org/draft/#sec-Type-Kinds + Kind() string + + // String serializes a Type into a GraphQL specification format type. + // + // http://spec.graphql.org/draft/#sec-Serialization-Format + String() string +} + +// List represents a GraphQL ListType. +// +// http://spec.graphql.org/draft/#ListType +type List struct { + // OfType represents the inner-type of a List type. + // For example, the List type `[Foo]` has an OfType of Foo. + OfType Type +} + +// NonNull represents a GraphQL NonNullType. +// +// https://spec.graphql.org/draft/#NonNullType +type NonNull struct { + // OfType represents the inner-type of a NonNull type. + // For example, the NonNull type `Foo!` has an OfType of Foo. + OfType Type +} + +func (*List) Kind() string { return "LIST" } +func (*NonNull) Kind() string { return "NON_NULL" } +func (*TypeName) Kind() string { panic("TypeName needs to be resolved to actual type") } + +func (t *List) String() string { return "[" + t.OfType.String() + "]" } +func (t *NonNull) String() string { return t.OfType.String() + "!" } +func (*TypeName) String() string { panic("TypeName needs to be resolved to actual type") } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/union.go b/vendor/github.com/graph-gophers/graphql-go/types/union.go new file mode 100644 index 00000000..bb916673 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/union.go @@ -0,0 +1,24 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// Union types represent objects that could be one of a list of GraphQL object types, but provides no +// guaranteed fields between those types. +// +// They also differ from interfaces in that object types declare what interfaces they implement, but +// are not aware of what unions contain them. +// +// http://spec.graphql.org/draft/#sec-Unions +type Union struct { + Name string + UnionMemberTypes []*ObjectTypeDefinition + Desc string + Directives DirectiveList + TypeNames []string + Loc errors.Location +} + +func (*Union) Kind() string { return "UNION" } +func (t *Union) String() string { return t.Name } +func (t *Union) TypeName() string { return t.Name } +func (t *Union) Description() string { return t.Desc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/value.go b/vendor/github.com/graph-gophers/graphql-go/types/value.go new file mode 100644 index 00000000..9f8d041a --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/value.go @@ -0,0 +1,141 @@ +package types + +import ( + "strconv" + "strings" + "text/scanner" + + "github.com/graph-gophers/graphql-go/errors" +) + +// Value represents a literal input or literal default value in the GraphQL Specification. +// +// http://spec.graphql.org/draft/#sec-Input-Values +type Value interface { + // Deserialize transforms a GraphQL specification format literal into a Go type. + Deserialize(vars map[string]interface{}) interface{} + + // String serializes a Value into a GraphQL specification format literal. + String() string + Location() errors.Location +} + +// PrimitiveValue represents one of the following GraphQL scalars: Int, Float, +// String, or Boolean +type PrimitiveValue struct { + Type rune + Text string + Loc errors.Location +} + +func (val *PrimitiveValue) Deserialize(vars map[string]interface{}) interface{} { + switch val.Type { + case scanner.Int: + value, err := strconv.ParseInt(val.Text, 10, 32) + if err != nil { + panic(err) + } + return int32(value) + + case scanner.Float: + value, err := strconv.ParseFloat(val.Text, 64) + if err != nil { + panic(err) + } + return value + + case scanner.String: + value, err := strconv.Unquote(val.Text) + if err != nil { + panic(err) + } + return value + + case scanner.Ident: + switch val.Text { + case "true": + return true + case "false": + return false + default: + return val.Text + } + + default: + panic("invalid literal value") + } +} + +func (val *PrimitiveValue) String() string { return val.Text } +func (val *PrimitiveValue) Location() errors.Location { return val.Loc } + +// ListValue represents a literal list Value in the GraphQL specification. +// +// http://spec.graphql.org/draft/#sec-List-Value +type ListValue struct { + Values []Value + Loc errors.Location +} + +func (val *ListValue) Deserialize(vars map[string]interface{}) interface{} { + entries := make([]interface{}, len(val.Values)) + for i, entry := range val.Values { + entries[i] = entry.Deserialize(vars) + } + return entries +} + +func (val *ListValue) String() string { + entries := make([]string, len(val.Values)) + for i, entry := range val.Values { + entries[i] = entry.String() + } + return "[" + strings.Join(entries, ", ") + "]" +} + +func (val *ListValue) Location() errors.Location { return val.Loc } + +// ObjectValue represents a literal object Value in the GraphQL specification. +// +// http://spec.graphql.org/draft/#sec-Object-Value +type ObjectValue struct { + Fields []*ObjectField + Loc errors.Location +} + +// ObjectField represents field/value pairs in a literal ObjectValue. +type ObjectField struct { + Name Ident + Value Value +} + +func (val *ObjectValue) Deserialize(vars map[string]interface{}) interface{} { + fields := make(map[string]interface{}, len(val.Fields)) + for _, f := range val.Fields { + fields[f.Name.Name] = f.Value.Deserialize(vars) + } + return fields +} + +func (val *ObjectValue) String() string { + entries := make([]string, 0, len(val.Fields)) + for _, f := range val.Fields { + entries = append(entries, f.Name.Name+": "+f.Value.String()) + } + return "{" + strings.Join(entries, ", ") + "}" +} + +func (val *ObjectValue) Location() errors.Location { + return val.Loc +} + +// NullValue represents a literal `null` Value in the GraphQL specification. +// +// http://spec.graphql.org/draft/#sec-Null-Value +type NullValue struct { + Loc errors.Location +} + +func (val *NullValue) Deserialize(vars map[string]interface{}) interface{} { return nil } +func (val *NullValue) String() string { return "null" } +func (val *NullValue) Location() errors.Location { return val.Loc } diff --git a/vendor/github.com/graph-gophers/graphql-go/types/variable.go b/vendor/github.com/graph-gophers/graphql-go/types/variable.go new file mode 100644 index 00000000..1a4e2a51 --- /dev/null +++ b/vendor/github.com/graph-gophers/graphql-go/types/variable.go @@ -0,0 +1,15 @@ +package types + +import "github.com/graph-gophers/graphql-go/errors" + +// Variable is used in GraphQL operations to parameterize an input value. +// +// http://spec.graphql.org/draft/#Variable +type Variable struct { + Name string + Loc errors.Location +} + +func (v Variable) Deserialize(vars map[string]interface{}) interface{} { return vars[v.Name] } +func (v Variable) String() string { return "$" + v.Name } +func (v *Variable) Location() errors.Location { return v.Loc } |