feat: Custom message files (#1992)

* feat: add get custom message text to admin api

* feat: read custom message texts from files

* feat: get languages in apis

* feat: get languages in apis

* feat: get languages in apis

* feat: pr feedback

* feat: docs

* feat: merge main

internal/domain/custom_message_text.go

@@ -21,6 +21,14 @@ const (
 	MessageFooterText        = "Footer"
 )
 
+type MessageTexts struct {
+	InitCode      CustomMessageText
+	PasswordReset CustomMessageText
+	VerifyEmail   CustomMessageText
+	VerifyPhone   CustomMessageText
+	DomainClaimed CustomMessageText
+}
+
 type CustomMessageText struct {
 	models.ObjectRoot
 
@@ -40,3 +48,19 @@ type CustomMessageText struct {
 func (m *CustomMessageText) IsValid() bool {
 	return m.MessageTextType != "" && m.Language != language.Und
 }
+
+func (m *MessageTexts) GetMessageTextByType(msgType string) *CustomMessageText {
+	switch msgType {
+	case InitCodeMessageType:
+		return &m.InitCode
+	case PasswordResetMessageType:
+		return &m.PasswordReset
+	case VerifyEmailMessageType:
+		return &m.VerifyEmail
+	case VerifyPhoneMessageType:
+		return &m.VerifyPhone
+	case DomainClaimedMessageType:
+		return &m.DomainClaimed
+	}
+	return nil
+}