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translator.go
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translator.go
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package disgoi18n
import (
"bytes"
"encoding/json"
"fmt"
"github.com/disgoorg/disgo/discord"
"math/rand"
"os"
"strings"
"text/template"
"time"
)
const (
defaultLocale = discord.LocaleEnglishUS
leftDelim = "{{"
rightDelim = "}}"
keyDelim = "."
executionPolicy = "missingkey=error"
)
func init() {
rand.New(rand.NewSource(time.Now().UnixNano()))
}
func newTranslatorImpl() *translatorImpl {
return &translatorImpl{
defaultLocale: defaultLocale,
translations: make(map[discord.Locale]bundle),
loadedBundles: make(map[string]bundle),
}
}
func (translator *translatorImpl) SetDefault(language discord.Locale) {
translator.defaultLocale = language
}
func (translator *translatorImpl) LoadBundle(locale discord.Locale, path string) error {
loadedBundle, found := translator.loadedBundles[path]
if !found {
buf, err := os.ReadFile(path)
if err != nil {
return err
}
var jsonContent map[string]interface{}
err = json.Unmarshal(buf, &jsonContent)
if err != nil {
return err
}
newBundle := translator.mapBundleStructure(jsonContent)
translator.loadedBundles[path] = newBundle
translator.translations[locale] = newBundle
} else {
translator.translations[locale] = loadedBundle
}
return nil
}
func (translator *translatorImpl) Get(locale discord.Locale, key string, variables Vars) string {
bundles, found := translator.translations[locale]
if !found {
if locale != translator.defaultLocale {
return translator.Get(translator.defaultLocale, key, variables)
} else {
return key
}
}
raws, found := bundles[key]
if !found || len(raws) == 0 {
if locale != translator.defaultLocale {
return translator.Get(translator.defaultLocale, key, variables)
} else {
return key
}
}
raw := raws[rand.Intn(len(raws))]
if variables != nil && strings.Contains(raw, leftDelim) {
t, err := template.New("").Delims(leftDelim, rightDelim).Option(executionPolicy).Parse(raw)
if err != nil {
return raw
}
var buf bytes.Buffer
err = t.Execute(&buf, variables)
if err != nil {
return raw
}
return buf.String()
}
return raw
}
func (translator *translatorImpl) GetLocalizations(key string, variables Vars) map[discord.Locale]string {
localizations := make(map[discord.Locale]string)
for locale := range translator.translations {
localizations[locale] = translator.Get(locale, key, variables)
}
return localizations
}
func (translator *translatorImpl) mapBundleStructure(jsonContent map[string]interface{}) bundle {
bundle := make(map[string][]string)
for key, content := range jsonContent {
switch v := content.(type) {
case string:
bundle[key] = []string{v}
case []interface{}:
values := make([]string, 0)
for _, value := range v {
values = append(values, fmt.Sprintf("%v", value))
}
bundle[key] = values
case map[string]interface{}:
subValues := translator.mapBundleStructure(v)
for subKey, subValue := range subValues {
bundle[fmt.Sprintf("%s%s%s", key, keyDelim, subKey)] = subValue
}
default:
bundle[key] = []string{fmt.Sprintf("%v", v)}
}
}
return bundle
}