Refactor everything

internal/lang/main.go

@@ -0,0 +1,41 @@
+package lang
+
+import (
+	"embed"
+	"encoding/json"
+	"log/slog"
+)
+
+//go:embed lang
+var lang embed.FS
+var translations = map[string]string{}
+
+// SetLanguage loads a json file for selected language into the Translations map, with English language as a fallback.
+func SetLanguage(language string) error {
+	loadLanguage := func(language string) error {
+		filename := "lang/" + language + ".json"
+		fileContents, err := lang.ReadFile(filename)
+		if err != nil {
+			slog.Error("error reading language file",
+				"error", err,
+				"file", filename)
+			return err
+		}
+		return json.Unmarshal(fileContents, &translations)
+	}
+	translations = map[string]string{} // Clear the map to avoid previous language remaining
+	err := loadLanguage("en")          // Load English as fallback
+	if err != nil {
+		return err
+	}
+	return loadLanguage(language)
+}
+
+// Translate attempts to match an id to a string in current language.
+func Translate(id string) string {
+	if v, ok := translations[id]; !ok {
+		return id
+	} else {
+		return v
+	}
+}