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|
package ddp
import (
"crypto/sha256"
"encoding/hex"
"io"
"strings"
"time"
)
// ----------------------------------------------------------------------
// EJSON document interface
// ----------------------------------------------------------------------
// https://github.com/meteor/meteor/blob/devel/packages/ddp/DDP.md#appendix-ejson
// Doc provides hides the complexity of ejson documents.
type Doc struct {
root interface{}
}
// NewDoc creates a new document from a generic json parsed document.
func NewDoc(in interface{}) *Doc {
doc := &Doc{in}
return doc
}
// Map locates a map[string]interface{} - json object - at a path
// or returns nil if not found.
func (d *Doc) Map(path string) map[string]interface{} {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case map[string]interface{}:
return m
default:
return nil
}
}
return nil
}
// Array locates an []interface{} - json array - at a path
// or returns nil if not found.
func (d *Doc) Array(path string) []interface{} {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case []interface{}:
return m
default:
return nil
}
}
return nil
}
// StringArray locates an []string - json array of strings - at a path
// or returns nil if not found. The string array will contain all string values
// in the array and skip any non-string entries.
func (d *Doc) StringArray(path string) []string {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case []interface{}:
items := []string{}
for _, item := range m {
switch val := item.(type) {
case string:
items = append(items, val)
}
}
return items
case []string:
return m
default:
return nil
}
}
return nil
}
// String returns a string value located at the path or an empty string if not found.
func (d *Doc) String(path string) string {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case string:
return m
default:
return ""
}
}
return ""
}
// Bool returns a boolean value located at the path or false if not found.
func (d *Doc) Bool(path string) bool {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case bool:
return m
default:
return false
}
}
return false
}
// Float returns a float64 value located at the path or zero if not found.
func (d *Doc) Float(path string) float64 {
item := d.Item(path)
if item != nil {
switch m := item.(type) {
case float64:
return m
default:
return 0
}
}
return 0
}
// Time returns a time value located at the path or nil if not found.
func (d *Doc) Time(path string) time.Time {
ticks := d.Float(path + ".$date")
var t time.Time
if ticks > 0 {
sec := int64(ticks / 1000)
t = time.Unix(int64(sec), 0)
}
return t
}
// Item locates a "raw" item at the provided path, returning
// the item found or nil if not found.
func (d *Doc) Item(path string) interface{} {
item := d.root
steps := strings.Split(path, ".")
for _, step := range steps {
// This is an intermediate step - we must be in a map
switch m := item.(type) {
case map[string]interface{}:
item = m[step]
case Update:
item = m[step]
default:
return nil
}
}
return item
}
// Set a value for a path. Intermediate items are created as necessary.
func (d *Doc) Set(path string, value interface{}) {
item := d.root
steps := strings.Split(path, ".")
last := steps[len(steps)-1]
steps = steps[:len(steps)-1]
for _, step := range steps {
// This is an intermediate step - we must be in a map
switch m := item.(type) {
case map[string]interface{}:
item = m[step]
if item == nil {
item = map[string]interface{}{}
m[step] = item
}
default:
return
}
}
// Item is now the last map so we just set the value
switch m := item.(type) {
case map[string]interface{}:
m[last] = value
}
}
// Accounts password login support
type Login struct {
User *User `json:"user"`
Password *Password `json:"password"`
}
func NewEmailLogin(email, pass string) *Login {
return &Login{User: &User{Email: email}, Password: NewPassword(pass)}
}
func NewUsernameLogin(user, pass string) *Login {
return &Login{User: &User{Username: user}, Password: NewPassword(pass)}
}
type LoginResume struct {
Token string `json:"resume"`
}
func NewLoginResume(token string) *LoginResume {
return &LoginResume{Token: token}
}
type User struct {
Email string `json:"email,omitempty"`
Username string `json:"username,omitempty"`
}
type Password struct {
Digest string `json:"digest"`
Algorithm string `json:"algorithm"`
}
func NewPassword(pass string) *Password {
sha := sha256.New()
io.WriteString(sha, pass)
digest := sha.Sum(nil)
return &Password{Digest: hex.EncodeToString(digest), Algorithm: "sha-256"}
}
|
