1 files changed, 315 insertions, 0 deletions
diff --git a/vendor/github.com/nicksnyder/go-i18n/i18n/bundle/bundle.go b/vendor/github.com/nicksnyder/go-i18n/i18n/bundle/bundle.go
new file mode 100644
index 00000000..e93db95d
--- /dev/null
+++ b/vendor/github.com/nicksnyder/go-i18n/i18n/bundle/bundle.go
@@ -0,0 +1,315 @@
+// Package bundle manages translations for multiple languages.
+package bundle
+
+import (
+	"encoding/json"
+	"fmt"
+	"gopkg.in/yaml.v2"
+	"io/ioutil"
+	"reflect"
+
+	"path/filepath"
+
+	"github.com/nicksnyder/go-i18n/i18n/language"
+	"github.com/nicksnyder/go-i18n/i18n/translation"
+)
+
+// TranslateFunc is a copy of i18n.TranslateFunc to avoid a circular dependency.
+type TranslateFunc func(translationID string, args ...interface{}) string
+
+// Bundle stores the translations for multiple languages.
+type Bundle struct {
+	// The primary translations for a language tag and translation id.
+	translations map[string]map[string]translation.Translation
+
+	// Translations that can be used when an exact language match is not possible.
+	fallbackTranslations map[string]map[string]translation.Translation
+}
+
+// New returns an empty bundle.
+func New() *Bundle {
+	return &Bundle{
+		translations:         make(map[string]map[string]translation.Translation),
+		fallbackTranslations: make(map[string]map[string]translation.Translation),
+	}
+}
+
+// MustLoadTranslationFile is similar to LoadTranslationFile
+// except it panics if an error happens.
+func (b *Bundle) MustLoadTranslationFile(filename string) {
+	if err := b.LoadTranslationFile(filename); err != nil {
+		panic(err)
+	}
+}
+
+// LoadTranslationFile loads the translations from filename into memory.
+//
+// The language that the translations are associated with is parsed from the filename (e.g. en-US.json).
+//
+// Generally you should load translation files once during your program's initialization.
+func (b *Bundle) LoadTranslationFile(filename string) error {
+	buf, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return err
+	}
+	return b.ParseTranslationFileBytes(filename, buf)
+}
+
+// ParseTranslationFileBytes is similar to LoadTranslationFile except it parses the bytes in buf.
+//
+// It is useful for parsing translation files embedded with go-bindata.
+func (b *Bundle) ParseTranslationFileBytes(filename string, buf []byte) error {
+	basename := filepath.Base(filename)
+	langs := language.Parse(basename)
+	switch l := len(langs); {
+	case l == 0:
+		return fmt.Errorf("no language found in %q", basename)
+	case l > 1:
+		return fmt.Errorf("multiple languages found in filename %q: %v; expected one", basename, langs)
+	}
+	translations, err := parseTranslations(filename, buf)
+	if err != nil {
+		return err
+	}
+	b.AddTranslation(langs[0], translations...)
+	return nil
+}
+
+func parseTranslations(filename string, buf []byte) ([]translation.Translation, error) {
+	var unmarshalFunc func([]byte, interface{}) error
+	switch format := filepath.Ext(filename); format {
+	case ".json":
+		unmarshalFunc = json.Unmarshal
+	case ".yaml":
+		unmarshalFunc = yaml.Unmarshal
+	default:
+		return nil, fmt.Errorf("unsupported file extension %s", format)
+	}
+
+	var translationsData []map[string]interface{}
+	if len(buf) > 0 {
+		if err := unmarshalFunc(buf, &translationsData); err != nil {
+			return nil, err
+		}
+	}
+
+	translations := make([]translation.Translation, 0, len(translationsData))
+	for i, translationData := range translationsData {
+		t, err := translation.NewTranslation(translationData)
+		if err != nil {
+			return nil, fmt.Errorf("unable to parse translation #%d in %s because %s\n%v", i, filename, err, translationData)
+		}
+		translations = append(translations, t)
+	}
+	return translations, nil
+}
+
+// AddTranslation adds translations for a language.
+//
+// It is useful if your translations are in a format not supported by LoadTranslationFile.
+func (b *Bundle) AddTranslation(lang *language.Language, translations ...translation.Translation) {
+	if b.translations[lang.Tag] == nil {
+		b.translations[lang.Tag] = make(map[string]translation.Translation, len(translations))
+	}
+	currentTranslations := b.translations[lang.Tag]
+	for _, newTranslation := range translations {
+		if currentTranslation := currentTranslations[newTranslation.ID()]; currentTranslation != nil {
+			currentTranslations[newTranslation.ID()] = currentTranslation.Merge(newTranslation)
+		} else {
+			currentTranslations[newTranslation.ID()] = newTranslation
+		}
+	}
+
+	// lang can provide translations for less specific language tags.
+	for _, tag := range lang.MatchingTags() {
+		b.fallbackTranslations[tag] = currentTranslations
+	}
+}
+
+// Translations returns all translations in the bundle.
+func (b *Bundle) Translations() map[string]map[string]translation.Translation {
+	return b.translations
+}
+
+// LanguageTags returns the tags of all languages that that have been added.
+func (b *Bundle) LanguageTags() []string {
+	var tags []string
+	for k := range b.translations {
+		tags = append(tags, k)
+	}
+	return tags
+}
+
+// LanguageTranslationIDs returns the ids of all translations that have been added for a given language.
+func (b *Bundle) LanguageTranslationIDs(languageTag string) []string {
+	var ids []string
+	for id := range b.translations[languageTag] {
+		ids = append(ids, id)
+	}
+	return ids
+}
+
+// MustTfunc is similar to Tfunc except it panics if an error happens.
+func (b *Bundle) MustTfunc(pref string, prefs ...string) TranslateFunc {
+	tfunc, err := b.Tfunc(pref, prefs...)
+	if err != nil {
+		panic(err)
+	}
+	return tfunc
+}
+
+// MustTfuncAndLanguage is similar to TfuncAndLanguage except it panics if an error happens.
+func (b *Bundle) MustTfuncAndLanguage(pref string, prefs ...string) (TranslateFunc, *language.Language) {
+	tfunc, language, err := b.TfuncAndLanguage(pref, prefs...)
+	if err != nil {
+		panic(err)
+	}
+	return tfunc, language
+}
+
+// Tfunc is similar to TfuncAndLanguage except is doesn't return the Language.
+func (b *Bundle) Tfunc(pref string, prefs ...string) (TranslateFunc, error) {
+	tfunc, _, err := b.TfuncAndLanguage(pref, prefs...)
+	return tfunc, err
+}
+
+// TfuncAndLanguage returns a TranslateFunc for the first Language that
+// has a non-zero number of translations in the bundle.
+//
+// The returned Language matches the the first language preference that could be satisfied,
+// but this may not strictly match the language of the translations used to satisfy that preference.
+//
+// For example, the user may request "zh". If there are no translations for "zh" but there are translations
+// for "zh-cn", then the translations for "zh-cn" will be used but the returned Language will be "zh".
+//
+// It can parse languages from Accept-Language headers (RFC 2616),
+// but it assumes weights are monotonically decreasing.
+func (b *Bundle) TfuncAndLanguage(pref string, prefs ...string) (TranslateFunc, *language.Language, error) {
+	lang := b.supportedLanguage(pref, prefs...)
+	var err error
+	if lang == nil {
+		err = fmt.Errorf("no supported languages found %#v", append(prefs, pref))
+	}
+	return func(translationID string, args ...interface{}) string {
+		return b.translate(lang, translationID, args...)
+	}, lang, err
+}
+
+// supportedLanguage returns the first language which
+// has a non-zero number of translations in the bundle.
+func (b *Bundle) supportedLanguage(pref string, prefs ...string) *language.Language {
+	lang := b.translatedLanguage(pref)
+	if lang == nil {
+		for _, pref := range prefs {
+			lang = b.translatedLanguage(pref)
+			if lang != nil {
+				break
+			}
+		}
+	}
+	return lang
+}
+
+func (b *Bundle) translatedLanguage(src string) *language.Language {
+	langs := language.Parse(src)
+	for _, lang := range langs {
+		if len(b.translations[lang.Tag]) > 0 ||
+			len(b.fallbackTranslations[lang.Tag]) > 0 {
+			return lang
+		}
+	}
+	return nil
+}
+
+func (b *Bundle) translate(lang *language.Language, translationID string, args ...interface{}) string {
+	if lang == nil {
+		return translationID
+	}
+
+	translations := b.translations[lang.Tag]
+	if translations == nil {
+		translations = b.fallbackTranslations[lang.Tag]
+		if translations == nil {
+			return translationID
+		}
+	}
+
+	translation := translations[translationID]
+	if translation == nil {
+		return translationID
+	}
+
+	var data interface{}
+	var count interface{}
+	if argc := len(args); argc > 0 {
+		if isNumber(args[0]) {
+			count = args[0]
+			if argc > 1 {
+				data = args[1]
+			}
+		} else {
+			data = args[0]
+		}
+	}
+
+	if count != nil {
+		if data == nil {
+			data = map[string]interface{}{"Count": count}
+		} else {
+			dataMap := toMap(data)
+			dataMap["Count"] = count
+			data = dataMap
+		}
+	}
+
+	p, _ := lang.Plural(count)
+	template := translation.Template(p)
+	if template == nil {
+		return translationID
+	}
+
+	s := template.Execute(data)
+	if s == "" {
+		return translationID
+	}
+	return s
+}
+
+func isNumber(n interface{}) bool {
+	switch n.(type) {
+	case int, int8, int16, int32, int64, string:
+		return true
+	}
+	return false
+}
+
+func toMap(input interface{}) map[string]interface{} {
+	if data, ok := input.(map[string]interface{}); ok {
+		return data
+	}
+	v := reflect.ValueOf(input)
+	switch v.Kind() {
+	case reflect.Ptr:
+		return toMap(v.Elem().Interface())
+	case reflect.Struct:
+		return structToMap(v)
+	default:
+		return nil
+	}
+}
+
+// Converts the top level of a struct to a map[string]interface{}.
+// Code inspired by github.com/fatih/structs.
+func structToMap(v reflect.Value) map[string]interface{} {
+	out := make(map[string]interface{})
+	t := v.Type()
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+		if field.PkgPath != "" {
+			// unexported field. skip.
+			continue
+		}
+		out[field.Name] = v.FieldByName(field.Name).Interface()
+	}
+	return out
+}