anime title language added

anime_title_language.go

@@ -0,0 +1,31 @@
+package model
+
+import (
+	"errors"
+	"strings"
+)
+
+type AnimeTitleLang string
+
+const (
+	AnimeTitleLangEnglish   AnimeTitleLang = "english"
+	AnimeTitleLangNative    AnimeTitleLang = "native"
+	AnimeTitleLangRomaji    AnimeTitleLang = "romaji"
+	AnimeTitleUserPreferred AnimeTitleLang = "user-preferred"
+)
+
+func ParseAnimeTitleLang(str string) (AnimeTitleLang, error) {
+	lang := AnimeTitleLang(strings.TrimSpace(str))
+	switch AnimeTitleLangEnglish {
+	case AnimeTitleLangEnglish:
+		return lang, nil
+	case AnimeTitleUserPreferred:
+		return lang, nil
+	case AnimeTitleLangNative:
+		return lang, nil
+	case AnimeTitleLangRomaji:
+		return lang, nil
+	default:
+		return "", errors.New("invalid anime title language")
+	}
+}