Refactor editor (#34780)

A complete rewrite

routers/web/repo/editor_apply_patch.go

@@ -0,0 +1,51 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"net/http"
+	"strings"
+
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/services/context"
+	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/repository/files"
+)
+
+func NewDiffPatch(ctx *context.Context) {
+	prepareEditorCommitFormOptions(ctx, "_diffpatch")
+	if ctx.Written() {
+		return
+	}
+
+	ctx.Data["PageIsPatch"] = true
+	ctx.HTML(http.StatusOK, tplPatchFile)
+}
+
+// NewDiffPatchPost response for sending patch page
+func NewDiffPatchPost(ctx *context.Context) {
+	parsed := parseEditorCommitSubmittedForm[*forms.EditRepoFileForm](ctx)
+	if ctx.Written() {
+		return
+	}
+
+	defaultCommitMessage := ctx.Locale.TrString("repo.editor.patch")
+	_, err := files.ApplyDiffPatch(ctx, ctx.Repo.Repository, ctx.Doer, &files.ApplyDiffPatchOptions{
+		LastCommitID: parsed.form.LastCommit,
+		OldBranch:    ctx.Repo.BranchName,
+		NewBranch:    parsed.TargetBranchName,
+		Message:      parsed.GetCommitMessage(defaultCommitMessage),
+		Content:      strings.ReplaceAll(parsed.form.Content.Value(), "\r\n", "\n"),
+		Author:       parsed.GitCommitter,
+		Committer:    parsed.GitCommitter,
+	})
+	if err != nil {
+		err = util.ErrorWrapLocale(err, "repo.editor.fail_to_apply_patch")
+	}
+	if err != nil {
+		editorHandleFileOperationError(ctx, parsed.TargetBranchName, err)
+		return
+	}
+	redirectForCommitChoice(ctx, parsed, parsed.form.TreePath)
+}