Merge pull request #39 from dennisfaust/master

Add LanguageTags and LanguageTranslationIDs functions

i18n/bundle/bundle.go

@@ -134,6 +134,24 @@ 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...)

i18n/bundle/bundle_test.go

@@ -4,6 +4,9 @@ import (
 	"fmt"
 	"testing"
 
+	"reflect"
+	"sort"
+
 	"github.com/nicksnyder/go-i18n/i18n/language"
 	"github.com/nicksnyder/go-i18n/i18n/translation"
 )
@@ -33,6 +36,31 @@ func TestMustTfunc(t *testing.T) {
 	New().MustTfunc("invalid")
 }
 
+func TestLanguageTagsAndTranslationIDs(t *testing.T) {
+	b := New()
+	translationID := "translation_id"
+	englishLanguage := languageWithTag("en-US")
+	frenchLanguage := languageWithTag("fr-FR")
+	spanishLanguage := languageWithTag("es")
+	addFakeTranslation(t, b, englishLanguage, "English"+translationID)
+	addFakeTranslation(t, b, frenchLanguage, translationID)
+	addFakeTranslation(t, b, spanishLanguage, translationID)
+
+	tags := b.LanguageTags()
+	sort.Strings(tags)
+	compareTo := []string{englishLanguage.Tag, spanishLanguage.Tag, frenchLanguage.Tag}
+	if !reflect.DeepEqual(tags, compareTo) {
+		t.Errorf("LanguageTags() = %#v; expected: %#v", tags, compareTo)
+	}
+
+	ids := b.LanguageTranslationIDs(englishLanguage.Tag)
+	sort.Strings(ids)
+	compareTo = []string{"English" + translationID}
+	if !reflect.DeepEqual(ids, compareTo) {
+		t.Errorf("LanguageTranslationIDs() = %#v; expected: %#v", ids, compareTo)
+	}
+}
+
 func TestTfuncAndLanguage(t *testing.T) {
 	b := New()
 	translationID := "translation_id"

i18n/i18n.go

@@ -115,6 +115,16 @@ func AddTranslation(lang *language.Language, translations ...translation.Transla
 	defaultBundle.AddTranslation(lang, translations...)
 }
 
+// LanguageTags returns the tags of all languages that have been added.
+func LanguageTags() []string {
+	return defaultBundle.LanguageTags()
+}
+
+// LanguageTranslationIDs returns the ids of all translations that have been added for a given language.
+func LanguageTranslationIDs(languageTag string) []string {
+	return defaultBundle.LanguageTranslationIDs(languageTag)
+}
+
 // MustTfunc is similar to Tfunc except it panics if an error happens.
 func MustTfunc(languageSource string, languageSources ...string) TranslateFunc {
 	return TranslateFunc(defaultBundle.MustTfunc(languageSource, languageSources...))