src: translator: ad merge method for load translations and merge with existing

Signed-off-by: Dmitrii Aleksandrov <goodmobiledevices@gmail.com>

Author: Insei

translator/inmem.go

@@ -25,6 +25,9 @@ func NewInMemStorage(opts ...InMemStorageOption) Storage {
 
 // Add adds new translations for a given language to the storage.
 func (t *inMemTranslatorStorage) Add(lang string, data map[string]string) {
+	if data == nil {
+		return
+	}
 	if _, ok := t.translations[lang]; !ok {
 		t.translations[lang] = data
 	}
@@ -33,6 +36,15 @@ func (t *inMemTranslatorStorage) Add(lang string, data map[string]string) {
 	}
 }
 
+func (t *inMemTranslatorStorage) Merge(locales map[string]map[string]string) {
+	if t.translations == nil {
+		return
+	}
+	for lang, data := range locales {
+		t.Add(lang, data)
+	}
+}
+
 // Get returns the translated value for a given format and language preferences.
 func (t *inMemTranslatorStorage) Get(prefer []string, format string, args ...any) string {
 	translatedFormat := format

translator/types.go

@@ -25,6 +25,8 @@ type Storage interface {
 
 	// Add adds translations for a specific language.
 	Add(lang string, data map[string]string)
+	// Merge already existing translations with new
+	Merge(locales map[string]map[string]string)
 }
 
 // Option interface defines a method for applying options to a translator.