1 files changed, 82 insertions, 0 deletions
diff --git a/routers/web/repo/editor_error.go b/routers/web/repo/editor_error.go
new file mode 100644
index 0000000000..245226a039
--- /dev/null
+++ b/routers/web/repo/editor_error.go
@@ -0,0 +1,82 @@
+// Copyright 2025 Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"errors"
+
+	git_model "code.gitea.io/gitea/models/git"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/utils"
+	context_service "code.gitea.io/gitea/services/context"
+	files_service "code.gitea.io/gitea/services/repository/files"
+)
+
+func errorAs[T error](v error) (e T, ok bool) {
+	if errors.As(v, &e) {
+		return e, true
+	}
+	return e, false
+}
+
+func editorHandleFileOperationErrorRender(ctx *context_service.Context, message, summary, details string) {
+	flashError, err := ctx.RenderToHTML(tplAlertDetails, map[string]any{
+		"Message": message,
+		"Summary": summary,
+		"Details": utils.SanitizeFlashErrorString(details),
+	})
+	if err == nil {
+		ctx.JSONError(flashError)
+	} else {
+		log.Error("RenderToHTML: %v", err)
+		ctx.JSONError(message + "\n" + summary + "\n" + utils.SanitizeFlashErrorString(details))
+	}
+}
+
+func editorHandleFileOperationError(ctx *context_service.Context, targetBranchName string, err error) {
+	if errAs := util.ErrorAsLocale(err); errAs != nil {
+		ctx.JSONError(ctx.Tr(errAs.TrKey, errAs.TrArgs...))
+	} else if errAs, ok := errorAs[git.ErrNotExist](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.file_modifying_no_longer_exists", errAs.RelPath))
+	} else if errAs, ok := errorAs[git_model.ErrLFSFileLocked](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.upload_file_is_locked", errAs.Path, errAs.UserName))
+	} else if errAs, ok := errorAs[files_service.ErrFilenameInvalid](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.filename_is_invalid", errAs.Path))
+	} else if errAs, ok := errorAs[files_service.ErrFilePathInvalid](err); ok {
+		switch errAs.Type {
+		case git.EntryModeSymlink:
+			ctx.JSONError(ctx.Tr("repo.editor.file_is_a_symlink", errAs.Path))
+		case git.EntryModeTree:
+			ctx.JSONError(ctx.Tr("repo.editor.filename_is_a_directory", errAs.Path))
+		case git.EntryModeBlob:
+			ctx.JSONError(ctx.Tr("repo.editor.directory_is_a_file", errAs.Path))
+		default:
+			ctx.JSONError(ctx.Tr("repo.editor.filename_is_invalid", errAs.Path))
+		}
+	} else if errAs, ok := errorAs[files_service.ErrRepoFileAlreadyExists](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.file_already_exists", errAs.Path))
+	} else if errAs, ok := errorAs[git.ErrBranchNotExist](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.branch_does_not_exist", errAs.Name))
+	} else if errAs, ok := errorAs[git_model.ErrBranchAlreadyExists](err); ok {
+		ctx.JSONError(ctx.Tr("repo.editor.branch_already_exists", errAs.BranchName))
+	} else if files_service.IsErrCommitIDDoesNotMatch(err) {
+		ctx.JSONError(ctx.Tr("repo.editor.commit_id_not_matching"))
+	} else if files_service.IsErrCommitIDDoesNotMatch(err) || git.IsErrPushOutOfDate(err) {
+		ctx.JSONError(ctx.Tr("repo.editor.file_changed_while_editing", ctx.Repo.RepoLink+"/compare/"+util.PathEscapeSegments(ctx.Repo.CommitID)+"..."+util.PathEscapeSegments(targetBranchName)))
+	} else if errAs, ok := errorAs[*git.ErrPushRejected](err); ok {
+		if errAs.Message == "" {
+			ctx.JSONError(ctx.Tr("repo.editor.push_rejected_no_message"))
+		} else {
+			editorHandleFileOperationErrorRender(ctx, ctx.Locale.TrString("repo.editor.push_rejected"), ctx.Locale.TrString("repo.editor.push_rejected_summary"), errAs.Message)
+		}
+	} else if errors.Is(err, util.ErrNotExist) {
+		ctx.JSONError(ctx.Tr("error.not_found"))
+	} else {
+		setting.PanicInDevOrTesting("unclear err %T: %v", err, err)
+		editorHandleFileOperationErrorRender(ctx, ctx.Locale.TrString("repo.editor.failed_to_commit"), ctx.Locale.TrString("repo.editor.failed_to_commit_summary"), err.Error())
+	}
+}