feat: editor write path

api/pkg/apperr/messages.go

@@ -155,3 +155,18 @@ const EmailUnavailableErrorCode = "email_unavailable"
 const LastAdminErrorCode = "last_admin"
 const AccountNotDeletableErrorCode = "account_not_deletable"
 const LastRoleHeader = "X-Last-Role"
+
+const RevisionConflictErrorMessage = "revision_conflict"
+const CurrentRevisionHeader = "X-Current-Revision"
+const LanguageUnavailableErrorMessage = "language_unavailable"
+const LanguageExistsErrorMessage = "language_exists"
+const ExistingArticleHeader = "X-Existing-Article-Id"
+const LanguageNotEnabledErrorMessage = "language_not_enabled"
+const MissingLanguagesHeader = "X-Missing-Languages"
+const LanguageDisabledErrorMessage = "language_disabled"
+const SourceUnavailableErrorMessage = "source_unavailable"
+const SourceOtherStoryErrorMessage = "source_other_story"
+const SlugConflictErrorMessage = "slug_conflict"
+const ConflictingArticlesHeader = "X-Conflicting-Articles"
+const StoryMoveRequiredErrorMessage = "story_move_required"
+const StoryBusyErrorMessage = "story_busy"