Improve code review comments

models/issues/comment.go

@@ -764,6 +764,10 @@ func (c *Comment) CodeCommentLink(ctx context.Context) string {
 	return fmt.Sprintf("%s/files#%s", c.Issue.Link(), c.HashTag())
 }
 
+func GetCodeCommentRef(prIndex, commentID int64) string {
+	return fmt.Sprintf("refs/pull/%d/code-comment-%d", prIndex, commentID)
+}
+
 // CreateComment creates comment with context
 func CreateComment(ctx context.Context, opts *CreateCommentOptions) (_ *Comment, err error) {
 	ctx, committer, err := db.TxContext(ctx)
@@ -1007,6 +1011,7 @@ type FindCommentsOptions struct {
 	RepoID      int64
 	IssueID     int64
 	ReviewID    int64
+	CommitSHA   string
 	Since       int64
 	Before      int64
 	Line        int64
@@ -1052,6 +1057,9 @@ func (opts FindCommentsOptions) ToConds() builder.Cond {
 	if opts.IsPull.Has() {
 		cond = cond.And(builder.Eq{"issue.is_pull": opts.IsPull.Value()})
 	}
+	if opts.CommitSHA != "" {
+		cond = cond.And(builder.Eq{"comment.commit_sha": opts.CommitSHA})
+	}
 	return cond
 }
 
@@ -1147,6 +1155,15 @@ func DeleteComment(ctx context.Context, comment *Comment) error {
 		return err
 	}
 
+	// delete review if the comment is the last comment of the review
+	if comment.ReviewID > 0 {
+		if _, err := db.GetEngine(ctx).ID(comment.ReviewID).
+			Where("NOT EXISTS (SELECT 1 FROM comment WHERE review_id = ?)", comment.ReviewID).
+			Delete(new(Review)); err != nil {
+			return err
+		}
+	}
+
 	if err := comment.neuterCrossReferences(ctx); err != nil {
 		return err
 	}

models/issues/comment_code.go

@@ -9,46 +9,52 @@ import (
 
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/renderhelper"
+	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/markup/markdown"
 
 	"xorm.io/builder"
 )
 
 // CodeComments represents comments on code by using this structure: FILENAME -> LINE (+ == proposed; - == previous) -> COMMENTS
-type CodeComments map[string]map[int64][]*Comment
+type CodeComments map[string][]*Comment
+
+func (cc CodeComments) AllComments() []*Comment {
+	var allComments []*Comment
+	for _, comments := range cc {
+		allComments = append(allComments, comments...)
+	}
+	return allComments
+}
 
 // FetchCodeComments will return a 2d-map: ["Path"]["Line"] = Comments at line
-func FetchCodeComments(ctx context.Context, issue *Issue, currentUser *user_model.User, showOutdatedComments bool) (CodeComments, error) {
-	return fetchCodeCommentsByReview(ctx, issue, currentUser, nil, showOutdatedComments)
+func FetchCodeComments(ctx context.Context, repo *repo_model.Repository, issueID int64, currentUser *user_model.User, showOutdatedComments bool) (CodeComments, error) {
+	return fetchCodeCommentsByReview(ctx, repo, issueID, currentUser, nil, showOutdatedComments)
 }
 
-func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *user_model.User, review *Review, showOutdatedComments bool) (CodeComments, error) {
-	pathToLineToComment := make(CodeComments)
+func fetchCodeCommentsByReview(ctx context.Context, repo *repo_model.Repository, issueID int64, currentUser *user_model.User, review *Review, showOutdatedComments bool) (CodeComments, error) {
+	codeCommentsPathMap := make(CodeComments)
 	if review == nil {
 		review = &Review{ID: 0}
 	}
 	opts := FindCommentsOptions{
 		Type:     CommentTypeCode,
-		IssueID:  issue.ID,
+		IssueID:  issueID,
 		ReviewID: review.ID,
 	}
 
-	comments, err := findCodeComments(ctx, opts, issue, currentUser, review, showOutdatedComments)
+	comments, err := FindCodeComments(ctx, opts, repo, currentUser, review, showOutdatedComments)
 	if err != nil {
 		return nil, err
 	}
 
 	for _, comment := range comments {
-		if pathToLineToComment[comment.TreePath] == nil {
-			pathToLineToComment[comment.TreePath] = make(map[int64][]*Comment)
-		}
-		pathToLineToComment[comment.TreePath][comment.Line] = append(pathToLineToComment[comment.TreePath][comment.Line], comment)
+		codeCommentsPathMap[comment.TreePath] = append(codeCommentsPathMap[comment.TreePath], comment)
 	}
-	return pathToLineToComment, nil
+	return codeCommentsPathMap, nil
 }
 
-func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issue, currentUser *user_model.User, review *Review, showOutdatedComments bool) ([]*Comment, error) {
+func FindCodeComments(ctx context.Context, opts FindCommentsOptions, repo *repo_model.Repository, currentUser *user_model.User, review *Review, showOutdatedComments bool) ([]*Comment, error) {
 	var comments CommentList
 	if review == nil {
 		review = &Review{ID: 0}
@@ -67,10 +73,6 @@ func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issu
 		return nil, err
 	}
 
-	if err := issue.LoadRepo(ctx); err != nil {
-		return nil, err
-	}
-
 	if err := comments.LoadPosters(ctx); err != nil {
 		return nil, err
 	}
@@ -110,12 +112,12 @@ func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issu
 			return nil, err
 		}
 
-		if err := comment.LoadReactions(ctx, issue.Repo); err != nil {
+		if err := comment.LoadReactions(ctx, repo); err != nil {
 			return nil, err
 		}
 
 		var err error
-		rctx := renderhelper.NewRenderContextRepoComment(ctx, issue.Repo, renderhelper.RepoCommentOptions{
+		rctx := renderhelper.NewRenderContextRepoComment(ctx, repo, renderhelper.RepoCommentOptions{
 			FootnoteContextID: strconv.FormatInt(comment.ID, 10),
 		})
 		if comment.RenderedContent, err = markdown.RenderString(rctx, comment.Content); err != nil {
@@ -124,14 +126,3 @@ func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issu
 	}
 	return comments[:n], nil
 }
-
-// FetchCodeCommentsByLine fetches the code comments for a given treePath and line number
-func FetchCodeCommentsByLine(ctx context.Context, issue *Issue, currentUser *user_model.User, treePath string, line int64, showOutdatedComments bool) (CommentList, error) {
-	opts := FindCommentsOptions{
-		Type:     CommentTypeCode,
-		IssueID:  issue.ID,
-		TreePath: treePath,
-		Line:     line,
-	}
-	return findCodeComments(ctx, opts, issue, currentUser, nil, showOutdatedComments)
-}

models/issues/comment_test.go

@@ -68,15 +68,20 @@ func TestFetchCodeComments(t *testing.T) {
 
 	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 2})
 	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
-	res, err := issues_model.FetchCodeComments(db.DefaultContext, issue, user, false)
+	res, err := issues_model.FetchCodeComments(db.DefaultContext, issue.Repo, issue.ID, user, false)
 	assert.NoError(t, err)
 	assert.Contains(t, res, "README.md")
-	assert.Contains(t, res["README.md"], int64(4))
-	assert.Len(t, res["README.md"][4], 1)
-	assert.Equal(t, int64(4), res["README.md"][4][0].ID)
+	fourthLineComments := []*issues_model.Comment{}
+	for _, comment := range res["README.md"] {
+		if comment.Line == 4 {
+			fourthLineComments = append(fourthLineComments, comment)
+		}
+	}
+	assert.Len(t, fourthLineComments, 1)
+	assert.Equal(t, int64(4), fourthLineComments[0].ID)
 
 	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
-	res, err = issues_model.FetchCodeComments(db.DefaultContext, issue, user2, false)
+	res, err = issues_model.FetchCodeComments(db.DefaultContext, issue.Repo, issue.ID, user2, false)
 	assert.NoError(t, err)
 	assert.Len(t, res, 1)
 }

models/issues/issue.go

@@ -223,7 +223,7 @@ func (issue *Issue) LoadPullRequest(ctx context.Context) (err error) {
 	return nil
 }
 
-func (issue *Issue) loadComments(ctx context.Context) (err error) {
+func (issue *Issue) LoadComments(ctx context.Context) (err error) {
 	return issue.loadCommentsByType(ctx, CommentTypeUndefined)
 }
 
@@ -344,7 +344,7 @@ func (issue *Issue) LoadAttributes(ctx context.Context) (err error) {
 		return err
 	}
 
-	if err = issue.loadComments(ctx); err != nil {
+	if err = issue.LoadComments(ctx); err != nil {
 		return err
 	}
 

models/issues/pull.go

@@ -15,7 +15,6 @@ import (
 	"code.gitea.io/gitea/models/db"
 	git_model "code.gitea.io/gitea/models/git"
 	org_model "code.gitea.io/gitea/models/organization"
-	pull_model "code.gitea.io/gitea/models/pull"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
@@ -156,26 +155,6 @@ func init() {
 	db.RegisterModel(new(PullRequest))
 }
 
-// DeletePullsByBaseRepoID deletes all pull requests by the base repository ID
-func DeletePullsByBaseRepoID(ctx context.Context, repoID int64) error {
-	deleteCond := builder.Select("id").From("pull_request").Where(builder.Eq{"pull_request.base_repo_id": repoID})
-
-	// Delete scheduled auto merges
-	if _, err := db.GetEngine(ctx).In("pull_id", deleteCond).
-		Delete(&pull_model.AutoMerge{}); err != nil {
-		return err
-	}
-
-	// Delete review states
-	if _, err := db.GetEngine(ctx).In("pull_id", deleteCond).
-		Delete(&pull_model.ReviewState{}); err != nil {
-		return err
-	}
-
-	_, err := db.DeleteByBean(ctx, &PullRequest{BaseRepoID: repoID})
-	return err
-}
-
 func (pr *PullRequest) String() string {
 	if pr == nil {
 		return "<PullRequest nil>"
@@ -413,11 +392,16 @@ func (pr *PullRequest) getReviewedByLines(ctx context.Context, writer io.Writer)
 	return committer.Commit()
 }
 
-// GetGitRefName returns git ref for hidden pull request branch
+// GetGitHeadRefName returns git head commit id ref for the pull request's branch
 func (pr *PullRequest) GetGitHeadRefName() string {
 	return fmt.Sprintf("%s%d/head", git.PullPrefix, pr.Index)
 }
 
+// GetGitMergeRefName returns git merged commit id ref for the pull request
+func (pr *PullRequest) GetGitMergeRefName() string {
+	return fmt.Sprintf("%s%d/merge", git.PullPrefix, pr.Index)
+}
+
 func (pr *PullRequest) GetGitHeadBranchRefName() string {
 	return fmt.Sprintf("%s%s", git.BranchPrefix, pr.HeadBranch)
 }

models/issues/review.go

@@ -159,7 +159,7 @@ func (r *Review) LoadCodeComments(ctx context.Context) (err error) {
 	if err = r.LoadIssue(ctx); err != nil {
 		return err
 	}
-	r.CodeComments, err = fetchCodeCommentsByReview(ctx, r.Issue, nil, r, false)
+	r.CodeComments, err = fetchCodeCommentsByReview(ctx, r.Issue.Repo, r.Issue.ID, nil, r, false)
 	return err
 }
 
@@ -432,6 +432,10 @@ func SubmitReview(ctx context.Context, doer *user_model.User, issue *Issue, revi
 	defer committer.Close()
 	sess := db.GetEngine(ctx)
 
+	if err := issue.LoadRepo(ctx); err != nil {
+		return nil, nil, fmt.Errorf("LoadRepo: %w", err)
+	}
+
 	official := false
 
 	review, err := GetCurrentReview(ctx, doer, issue)

models/issues/review_test.go

@@ -48,7 +48,7 @@ func TestReview_LoadCodeComments(t *testing.T) {
 	assert.NoError(t, review.LoadAttributes(db.DefaultContext))
 	assert.NoError(t, review.LoadCodeComments(db.DefaultContext))
 	assert.Len(t, review.CodeComments, 1)
-	assert.Equal(t, int64(4), review.CodeComments["README.md"][int64(4)][0].Line)
+	assert.Equal(t, int64(4), review.CodeComments["README.md"][0].Line)
 }
 
 func TestReviewType_Icon(t *testing.T) {

models/migrations/migrations.go

@@ -24,6 +24,7 @@ import (
 	"code.gitea.io/gitea/models/migrations/v1_22"
 	"code.gitea.io/gitea/models/migrations/v1_23"
 	"code.gitea.io/gitea/models/migrations/v1_24"
+	"code.gitea.io/gitea/models/migrations/v1_25"
 	"code.gitea.io/gitea/models/migrations/v1_6"
 	"code.gitea.io/gitea/models/migrations/v1_7"
 	"code.gitea.io/gitea/models/migrations/v1_8"
@@ -382,6 +383,9 @@ func prepareMigrationTasks() []*migration {
 		newMigration(318, "Add anonymous_access_mode for repo_unit", v1_24.AddRepoUnitAnonymousAccessMode),
 		newMigration(319, "Add ExclusiveOrder to Label table", v1_24.AddExclusiveOrderColumnToLabelTable),
 		newMigration(320, "Migrate two_factor_policy to login_source table", v1_24.MigrateSkipTwoFactor),
+
+		// Gitea 1.24.0 ends at database version 321
+		newMigration(321, "Migrate commit id of pull requests code review comment", v1_25.MigrateCommitIDOfPullRequestCodeReviewComment),
 	}
 	return preparedMigrations
 }

models/migrations/v1_25/v321.go

@@ -0,0 +1,14 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_25
+
+import (
+	"xorm.io/xorm"
+)
+
+// MigrateCommitIDOfPullRequestCodeReviewComment this will be almost right before comment on the special commit of the pull request
+func MigrateCommitIDOfPullRequestCodeReviewComment(x *xorm.Engine) error {
+	_, err := x.Exec("UPDATE comment SET commit_sha = (select merge_base from pull_request WHERE issue_id = comment.issue_id) WHERE line < 0")
+	return err
+}

modules/git/commit.go

@@ -258,11 +258,7 @@ func (c *Commit) CommitsBeforeLimit(num int) ([]*Commit, error) {
 
 // CommitsBeforeUntil returns the commits between commitID to current revision
 func (c *Commit) CommitsBeforeUntil(commitID string) ([]*Commit, error) {
-	endCommit, err := c.repo.GetCommit(commitID)
-	if err != nil {
-		return nil, err
-	}
-	return c.repo.CommitsBetween(c, endCommit)
+	return c.repo.CommitsBetween(c.ID.String(), commitID)
 }
 
 // SearchCommitsOptions specify the parameters for SearchCommits

modules/git/diff.go

@@ -107,12 +107,16 @@ func ParseDiffHunkString(diffHunk string) (leftLine, leftHunk, rightLine, rightH
 	leftLine, _ = strconv.Atoi(leftRange[0][1:])
 	if len(leftRange) > 1 {
 		leftHunk, _ = strconv.Atoi(leftRange[1])
+	} else {
+		leftHunk = 1
 	}
 	if len(ranges) > 1 {
 		rightRange := strings.Split(ranges[1], ",")
 		rightLine, _ = strconv.Atoi(rightRange[0])
 		if len(rightRange) > 1 {
 			rightHunk, _ = strconv.Atoi(rightRange[1])
+		} else {
+			rightHunk = 1
 		}
 	} else {
 		log.Debug("Parse line number failed: %v", diffHunk)
@@ -342,3 +346,55 @@ func GetAffectedFiles(repo *Repository, branchName, oldCommitID, newCommitID str
 
 	return affectedFiles, err
 }
+
+type HunkInfo struct {
+	LeftLine  int64 // Line number in the old file
+	LeftHunk  int64 // Number of lines in the old file
+	RightLine int64 // Line number in the new file
+	RightHunk int64 // Number of lines in the new file
+}
+
+// GetAffectedHunksForTwoCommitsSpecialFile returns the affected hunks between two commits for a special file
+// git diff --unified=0 abc123 def456 -- src/main.go
+func GetAffectedHunksForTwoCommitsSpecialFile(ctx context.Context, repoPath, oldCommitID, newCommitID, filePath string) ([]*HunkInfo, error) {
+	reader, writer := io.Pipe()
+	defer func() {
+		_ = reader.Close()
+		_ = writer.Close()
+	}()
+	go func() {
+		if err := NewCommand("diff", "--unified=0", "--no-color").
+			AddDynamicArguments(oldCommitID, newCommitID).
+			AddDashesAndList(filePath).
+			Run(ctx, &RunOpts{
+				Dir:    repoPath,
+				Stdout: writer,
+			}); err != nil {
+			_ = writer.CloseWithError(fmt.Errorf("GetAffectedHunksForTwoCommitsSpecialFile[%s, %s, %s, %s]: %w", repoPath, oldCommitID, newCommitID, filePath, err))
+			return
+		}
+		_ = writer.Close()
+	}()
+
+	scanner := bufio.NewScanner(reader)
+	hunks := make([]*HunkInfo, 0, 32)
+	for scanner.Scan() {
+		lof := scanner.Text()
+		if !strings.HasPrefix(lof, "@@") {
+			continue
+		}
+		// Parse the hunk header
+		leftLine, leftHunk, rightLine, rightHunk := ParseDiffHunkString(lof)
+		hunks = append([]*HunkInfo{}, &HunkInfo{
+			LeftLine:  int64(leftLine),
+			LeftHunk:  int64(leftHunk),
+			RightLine: int64(rightLine),
+			RightHunk: int64(rightHunk),
+		})
+	}
+	if scanner.Err() != nil {
+		return nil, fmt.Errorf("GetAffectedHunksForTwoCommitsSpecialFile[%s, %s, %s, %s]: %w", repoPath, oldCommitID, newCommitID, filePath, scanner.Err())
+	}
+
+	return hunks, nil
+}