some refactor about code comments(#20821) (#22707)

fix #22691
backport #20821

Co-authored-by: zeripath <art27@cantab.net>

7 files changed, 260 insertions, 188 deletions

diff --git a/models/db/list_options.go b/models/db/list_options.go
index 54f6d945c8..90048af179 100644
--- a/models/db/list_options.go
+++ b/models/db/list_options.go
@@ -5,8 +5,11 @@
 package db
 
 import (
+	"context"
+
 	"code.gitea.io/gitea/modules/setting"
 
+	"xorm.io/builder"
 	"xorm.io/xorm"
 )
 
@@ -19,6 +22,7 @@ const (
 type Paginator interface {
 	GetSkipTake() (skip, take int)
 	GetStartEnd() (start, end int)
+	IsListAll() bool
 }
 
 // GetPaginatedSession creates a paginated database session
@@ -45,9 +49,12 @@ func SetEnginePagination(e Engine, p Paginator) Engine {
 // ListOptions options to paginate results
 type ListOptions struct {
 	PageSize int
-	Page     int // start from 1
+	Page     int  // start from 1
+	ListAll  bool // if true, then PageSize and Page will not be taken
 }
 
+var _ Paginator = &ListOptions{}
+
 // GetSkipTake returns the skip and take values
 func (opts *ListOptions) GetSkipTake() (skip, take int) {
 	opts.SetDefaultValues()
@@ -61,6 +68,11 @@ func (opts *ListOptions) GetStartEnd() (start, end int) {
 	return start, end
 }
 
+// IsListAll indicates PageSize and Page will be ignored
+func (opts *ListOptions) IsListAll() bool {
+	return opts.ListAll
+}
+
 // SetDefaultValues sets default values
 func (opts *ListOptions) SetDefaultValues() {
 	if opts.PageSize <= 0 {
@@ -80,6 +92,8 @@ type AbsoluteListOptions struct {
 	take int
 }
 
+var _ Paginator = &AbsoluteListOptions{}
+
 // NewAbsoluteListOptions creates a list option with applied limits
 func NewAbsoluteListOptions(skip, take int) *AbsoluteListOptions {
 	if skip < 0 {
@@ -94,6 +108,11 @@ func NewAbsoluteListOptions(skip, take int) *AbsoluteListOptions {
 	return &AbsoluteListOptions{skip, take}
 }
 
+// IsListAll will always return false
+func (opts *AbsoluteListOptions) IsListAll() bool {
+	return false
+}
+
 // GetSkipTake returns the skip and take values
 func (opts *AbsoluteListOptions) GetSkipTake() (skip, take int) {
 	return opts.skip, opts.take
@@ -103,3 +122,32 @@ func (opts *AbsoluteListOptions) GetSkipTake() (skip, take int) {
 func (opts *AbsoluteListOptions) GetStartEnd() (start, end int) {
 	return opts.skip, opts.skip + opts.take
 }
+
+// FindOptions represents a find options
+type FindOptions interface {
+	Paginator
+	ToConds() builder.Cond
+}
+
+// Find represents a common find function which accept an options interface
+func Find[T any](ctx context.Context, opts FindOptions, objects *[]T) error {
+	sess := GetEngine(ctx).Where(opts.ToConds())
+	if !opts.IsListAll() {
+		sess.Limit(opts.GetSkipTake())
+	}
+	return sess.Find(&objects)
+}
+
+// Count represents a common count function which accept an options interface
+func Count[T any](ctx context.Context, opts FindOptions, object T) (int64, error) {
+	return GetEngine(ctx).Where(opts.ToConds()).Count(object)
+}
+
+// FindAndCount represents a common findandcount function which accept an options interface
+func FindAndCount[T any](ctx context.Context, opts FindOptions, objects *[]T) (int64, error) {
+	sess := GetEngine(ctx).Where(opts.ToConds())
+	if !opts.IsListAll() {
+		sess.Limit(opts.GetSkipTake())
+	}
+	return sess.FindAndCount(&objects)
+}
diff --git a/models/issues/comment.go b/models/issues/comment.go
index 291714799b..ee023272e1 100644
--- a/models/issues/comment.go
+++ b/models/issues/comment.go
@@ -9,9 +9,7 @@ package issues
 import (
 	"context"
 	"fmt"
-	"regexp"
 	"strconv"
-	"strings"
 	"unicode/utf8"
 
 	"code.gitea.io/gitea/models/db"
@@ -23,8 +21,6 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/markup"
-	"code.gitea.io/gitea/modules/markup/markdown"
 	"code.gitea.io/gitea/modules/references"
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
@@ -697,31 +693,6 @@ func (c *Comment) LoadReview() error {
 	return c.loadReview(db.DefaultContext)
 }
 
-var notEnoughLines = regexp.MustCompile(`fatal: file .* has only \d+ lines?`)
-
-func (c *Comment) checkInvalidation(doer *user_model.User, repo *git.Repository, branch string) error {
-	// FIXME differentiate between previous and proposed line
-	commit, err := repo.LineBlame(branch, repo.Path, c.TreePath, uint(c.UnsignedLine()))
-	if err != nil && (strings.Contains(err.Error(), "fatal: no such path") || notEnoughLines.MatchString(err.Error())) {
-		c.Invalidated = true
-		return UpdateComment(c, doer)
-	}
-	if err != nil {
-		return err
-	}
-	if c.CommitSHA != "" && c.CommitSHA != commit.ID.String() {
-		c.Invalidated = true
-		return UpdateComment(c, doer)
-	}
-	return nil
-}
-
-// CheckInvalidation checks if the line of code comment got changed by another commit.
-// If the line got changed the comment is going to be invalidated.
-func (c *Comment) CheckInvalidation(repo *git.Repository, doer *user_model.User, branch string) error {
-	return c.checkInvalidation(doer, repo, branch)
-}
-
 // DiffSide returns "previous" if Comment.Line is a LOC of the previous changes and "proposed" if it is a LOC of the proposed changes.
 func (c *Comment) DiffSide() string {
 	if c.Line < 0 {
@@ -1065,23 +1036,28 @@ func GetCommentByID(ctx context.Context, id int64) (*Comment, error) {
 // FindCommentsOptions describes the conditions to Find comments
 type FindCommentsOptions struct {
 	db.ListOptions
-	RepoID   int64
-	IssueID  int64
-	ReviewID int64
-	Since    int64
-	Before   int64
-	Line     int64
-	TreePath string
-	Type     CommentType
-}
-
-func (opts *FindCommentsOptions) toConds() builder.Cond {
+	RepoID      int64
+	IssueID     int64
+	ReviewID    int64
+	Since       int64
+	Before      int64
+	Line        int64
+	TreePath    string
+	Type        CommentType
+	IssueIDs    []int64
+	Invalidated util.OptionalBool
+}
+
+// ToConds implements FindOptions interface
+func (opts *FindCommentsOptions) ToConds() builder.Cond {
 	cond := builder.NewCond()
 	if opts.RepoID > 0 {
 		cond = cond.And(builder.Eq{"issue.repo_id": opts.RepoID})
 	}
 	if opts.IssueID > 0 {
 		cond = cond.And(builder.Eq{"comment.issue_id": opts.IssueID})
+	} else if len(opts.IssueIDs) > 0 {
+		cond = cond.And(builder.In("comment.issue_id", opts.IssueIDs))
 	}
 	if opts.ReviewID > 0 {
 		cond = cond.And(builder.Eq{"comment.review_id": opts.ReviewID})
@@ -1101,13 +1077,16 @@ func (opts *FindCommentsOptions) toConds() builder.Cond {
 	if len(opts.TreePath) > 0 {
 		cond = cond.And(builder.Eq{"comment.tree_path": opts.TreePath})
 	}
+	if !opts.Invalidated.IsNone() {
+		cond = cond.And(builder.Eq{"comment.invalidated": opts.Invalidated.IsTrue()})
+	}
 	return cond
 }
 
 // FindComments returns all comments according options
 func FindComments(ctx context.Context, opts *FindCommentsOptions) ([]*Comment, error) {
 	comments := make([]*Comment, 0, 10)
-	sess := db.GetEngine(ctx).Where(opts.toConds())
+	sess := db.GetEngine(ctx).Where(opts.ToConds())
 	if opts.RepoID > 0 {
 		sess.Join("INNER", "issue", "issue.id = comment.issue_id")
 	}
@@ -1126,13 +1105,19 @@ func FindComments(ctx context.Context, opts *FindCommentsOptions) ([]*Comment, e
 
 // CountComments count all comments according options by ignoring pagination
 func CountComments(opts *FindCommentsOptions) (int64, error) {
-	sess := db.GetEngine(db.DefaultContext).Where(opts.toConds())
+	sess := db.GetEngine(db.DefaultContext).Where(opts.ToConds())
 	if opts.RepoID > 0 {
 		sess.Join("INNER", "issue", "issue.id = comment.issue_id")
 	}
 	return sess.Count(&Comment{})
 }
 
+// UpdateCommentInvalidate updates comment invalidated column
+func UpdateCommentInvalidate(ctx context.Context, c *Comment) error {
+	_, err := db.GetEngine(ctx).ID(c.ID).Cols("invalidated").Update(c)
+	return err
+}
+
 // UpdateComment updates information of comment.
 func UpdateComment(c *Comment, doer *user_model.User) error {
 	ctx, committer, err := db.TxContext()
@@ -1191,120 +1176,6 @@ func DeleteComment(ctx context.Context, comment *Comment) error {
 	return DeleteReaction(ctx, &ReactionOptions{CommentID: comment.ID})
 }
 
-// CodeComments represents comments on code by using this structure: FILENAME -> LINE (+ == proposed; - == previous) -> COMMENTS
-type CodeComments map[string]map[int64][]*Comment
-
-// FetchCodeComments will return a 2d-map: ["Path"]["Line"] = Comments at line
-func FetchCodeComments(ctx context.Context, issue *Issue, currentUser *user_model.User) (CodeComments, error) {
-	return fetchCodeCommentsByReview(ctx, issue, currentUser, nil)
-}
-
-func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *user_model.User, review *Review) (CodeComments, error) {
-	pathToLineToComment := make(CodeComments)
-	if review == nil {
-		review = &Review{ID: 0}
-	}
-	opts := FindCommentsOptions{
-		Type:     CommentTypeCode,
-		IssueID:  issue.ID,
-		ReviewID: review.ID,
-	}
-
-	comments, err := findCodeComments(ctx, opts, issue, currentUser, review)
-	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)
-	}
-	return pathToLineToComment, nil
-}
-
-func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issue, currentUser *user_model.User, review *Review) ([]*Comment, error) {
-	var comments []*Comment
-	if review == nil {
-		review = &Review{ID: 0}
-	}
-	conds := opts.toConds()
-	if review.ID == 0 {
-		conds = conds.And(builder.Eq{"invalidated": false})
-	}
-	e := db.GetEngine(ctx)
-	if err := e.Where(conds).
-		Asc("comment.created_unix").
-		Asc("comment.id").
-		Find(&comments); err != nil {
-		return nil, err
-	}
-
-	if err := issue.LoadRepo(ctx); err != nil {
-		return nil, err
-	}
-
-	if err := CommentList(comments).loadPosters(ctx); err != nil {
-		return nil, err
-	}
-
-	// Find all reviews by ReviewID
-	reviews := make(map[int64]*Review)
-	ids := make([]int64, 0, len(comments))
-	for _, comment := range comments {
-		if comment.ReviewID != 0 {
-			ids = append(ids, comment.ReviewID)
-		}
-	}
-	if err := e.In("id", ids).Find(&reviews); err != nil {
-		return nil, err
-	}
-
-	n := 0
-	for _, comment := range comments {
-		if re, ok := reviews[comment.ReviewID]; ok && re != nil {
-			// If the review is pending only the author can see the comments (except if the review is set)
-			if review.ID == 0 && re.Type == ReviewTypePending &&
-				(currentUser == nil || currentUser.ID != re.ReviewerID) {
-				continue
-			}
-			comment.Review = re
-		}
-		comments[n] = comment
-		n++
-
-		if err := comment.LoadResolveDoer(); err != nil {
-			return nil, err
-		}
-
-		if err := comment.LoadReactions(issue.Repo); err != nil {
-			return nil, err
-		}
-
-		var err error
-		if comment.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-			Ctx:       ctx,
-			URLPrefix: issue.Repo.Link(),
-			Metas:     issue.Repo.ComposeMetas(),
-		}, comment.Content); err != nil {
-			return nil, err
-		}
-	}
-	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) ([]*Comment, error) {
-	opts := FindCommentsOptions{
-		Type:     CommentTypeCode,
-		IssueID:  issue.ID,
-		TreePath: treePath,
-		Line:     line,
-	}
-	return findCodeComments(ctx, opts, issue, currentUser, nil)
-}
-
 // UpdateCommentsMigrationsByType updates comments' migrations information via given git service type and original id and poster id
 func UpdateCommentsMigrationsByType(tp structs.GitServiceType, originalAuthorID string, posterID int64) error {
 	_, err := db.GetEngine(db.DefaultContext).Table("comment").
diff --git a/models/issues/comment_code.go b/models/issues/comment_code.go
new file mode 100644
index 0000000000..cd5b312189
--- /dev/null
+++ b/models/issues/comment_code.go
@@ -0,0 +1,129 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package issues
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/models/db"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/markup"
+	"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
+
+// FetchCodeComments will return a 2d-map: ["Path"]["Line"] = Comments at line
+func FetchCodeComments(ctx context.Context, issue *Issue, currentUser *user_model.User) (CodeComments, error) {
+	return fetchCodeCommentsByReview(ctx, issue, currentUser, nil)
+}
+
+func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *user_model.User, review *Review) (CodeComments, error) {
+	pathToLineToComment := make(CodeComments)
+	if review == nil {
+		review = &Review{ID: 0}
+	}
+	opts := FindCommentsOptions{
+		Type:     CommentTypeCode,
+		IssueID:  issue.ID,
+		ReviewID: review.ID,
+	}
+
+	comments, err := findCodeComments(ctx, opts, issue, currentUser, review)
+	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)
+	}
+	return pathToLineToComment, nil
+}
+
+func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issue, currentUser *user_model.User, review *Review) ([]*Comment, error) {
+	var comments []*Comment
+	if review == nil {
+		review = &Review{ID: 0}
+	}
+	conds := opts.ToConds()
+	if review.ID == 0 {
+		conds = conds.And(builder.Eq{"invalidated": false})
+	}
+	e := db.GetEngine(ctx)
+	if err := e.Where(conds).
+		Asc("comment.created_unix").
+		Asc("comment.id").
+		Find(&comments); err != nil {
+		return nil, err
+	}
+
+	if err := issue.LoadRepo(ctx); err != nil {
+		return nil, err
+	}
+
+	if err := CommentList(comments).loadPosters(ctx); err != nil {
+		return nil, err
+	}
+
+	// Find all reviews by ReviewID
+	reviews := make(map[int64]*Review)
+	ids := make([]int64, 0, len(comments))
+	for _, comment := range comments {
+		if comment.ReviewID != 0 {
+			ids = append(ids, comment.ReviewID)
+		}
+	}
+	if err := e.In("id", ids).Find(&reviews); err != nil {
+		return nil, err
+	}
+
+	n := 0
+	for _, comment := range comments {
+		if re, ok := reviews[comment.ReviewID]; ok && re != nil {
+			// If the review is pending only the author can see the comments (except if the review is set)
+			if review.ID == 0 && re.Type == ReviewTypePending &&
+				(currentUser == nil || currentUser.ID != re.ReviewerID) {
+				continue
+			}
+			comment.Review = re
+		}
+		comments[n] = comment
+		n++
+
+		if err := comment.LoadResolveDoer(); err != nil {
+			return nil, err
+		}
+
+		if err := comment.LoadReactions(issue.Repo); err != nil {
+			return nil, err
+		}
+
+		var err error
+		if comment.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
+			Ctx:       ctx,
+			URLPrefix: issue.Repo.Link(),
+			Metas:     issue.Repo.ComposeMetas(),
+		}, comment.Content); err != nil {
+			return nil, err
+		}
+	}
+	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) ([]*Comment, error) {
+	opts := FindCommentsOptions{
+		Type:     CommentTypeCode,
+		IssueID:  issue.ID,
+		TreePath: treePath,
+		Line:     line,
+	}
+	return findCodeComments(ctx, opts, issue, currentUser, nil)
+}
diff --git a/models/issues/pull_list.go b/models/issues/pull_list.go
index c69f18492b..2bdcdacc4e 100644
--- a/models/issues/pull_list.go
+++ b/models/issues/pull_list.go
@@ -13,7 +13,6 @@ import (
 	"code.gitea.io/gitea/models/unit"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
-	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 
 	"xorm.io/xorm"
@@ -162,7 +161,7 @@ func (prs PullRequestList) loadAttributes(ctx context.Context) error {
 	}
 
 	// Load issues.
-	issueIDs := prs.getIssueIDs()
+	issueIDs := prs.GetIssueIDs()
 	issues := make([]*Issue, 0, len(issueIDs))
 	if err := db.GetEngine(ctx).
 		Where("id > 0").
@@ -181,7 +180,8 @@ func (prs PullRequestList) loadAttributes(ctx context.Context) error {
 	return nil
 }
 
-func (prs PullRequestList) getIssueIDs() []int64 {
+// GetIssueIDs returns all issue ids
+func (prs PullRequestList) GetIssueIDs() []int64 {
 	issueIDs := make([]int64, 0, len(prs))
 	for i := range prs {
 		issueIDs = append(issueIDs, prs[i].IssueID)
@@ -193,24 +193,3 @@ func (prs PullRequestList) getIssueIDs() []int64 {
 func (prs PullRequestList) LoadAttributes() error {
 	return prs.loadAttributes(db.DefaultContext)
 }
-
-// InvalidateCodeComments will lookup the prs for code comments which got invalidated by change
-func (prs PullRequestList) InvalidateCodeComments(ctx context.Context, doer *user_model.User, repo *git.Repository, branch string) error {
-	if len(prs) == 0 {
-		return nil
-	}
-	issueIDs := prs.getIssueIDs()
-	var codeComments []*Comment
-	if err := db.GetEngine(ctx).
-		Where("type = ? and invalidated = ?", CommentTypeCode, false).
-		In("issue_id", issueIDs).
-		Find(&codeComments); err != nil {
-		return fmt.Errorf("find code comments: %w", err)
-	}
-	for _, comment := range codeComments {
-		if err := comment.CheckInvalidation(repo, doer, branch); err != nil {
-			return err
-		}
-	}
-	return nil
-}
diff --git a/models/issues/review.go b/models/issues/review.go
index 40781befe4..88fc0d94a8 100644
--- a/models/issues/review.go
+++ b/models/issues/review.go
@@ -978,7 +978,7 @@ func DeleteReview(r *Review) error {
 		ReviewID: r.ID,
 	}
 
-	if _, err := sess.Where(opts.toConds()).Delete(new(Comment)); err != nil {
+	if _, err := sess.Where(opts.ToConds()).Delete(new(Comment)); err != nil {
 		return err
 	}
 
@@ -988,7 +988,7 @@ func DeleteReview(r *Review) error {
 		ReviewID: r.ID,
 	}
 
-	if _, err := sess.Where(opts.toConds()).Delete(new(Comment)); err != nil {
+	if _, err := sess.Where(opts.ToConds()).Delete(new(Comment)); err != nil {
 		return err
 	}
 
@@ -1012,7 +1012,7 @@ func (r *Review) GetCodeCommentsCount() int {
 		IssueID:  r.IssueID,
 		ReviewID: r.ID,
 	}
-	conds := opts.toConds()
+	conds := opts.ToConds()
 	if r.ID == 0 {
 		conds = conds.And(builder.Eq{"invalidated": false})
 	}
@@ -1032,7 +1032,7 @@ func (r *Review) HTMLURL() string {
 		ReviewID: r.ID,
 	}
 	comment := new(Comment)
-	has, err := db.GetEngine(db.DefaultContext).Where(opts.toConds()).Get(comment)
+	has, err := db.GetEngine(db.DefaultContext).Where(opts.ToConds()).Get(comment)
 	if err != nil || !has {
 		return ""
 	}
diff --git a/services/pull/pull.go b/services/pull/pull.go
index fbfc31d4e7..3ec7ec92b7 100644
--- a/services/pull/pull.go
+++ b/services/pull/pull.go
@@ -240,7 +240,7 @@ func checkForInvalidation(ctx context.Context, requests issues_model.PullRequest
 	}
 	go func() {
 		// FIXME: graceful: We need to tell the manager we're doing something...
-		err := requests.InvalidateCodeComments(ctx, doer, gitRepo, branch)
+		err := InvalidateCodeComments(ctx, requests, doer, gitRepo, branch)
 		if err != nil {
 			log.Error("PullRequestList.InvalidateCodeComments: %v", err)
 		}
diff --git a/services/pull/review.go b/services/pull/review.go
index 16c9e108ee..5c86b7a9f3 100644
--- a/services/pull/review.go
+++ b/services/pull/review.go
@@ -23,6 +23,53 @@ import (
 	"code.gitea.io/gitea/modules/util"
 )
 
+var notEnoughLines = regexp.MustCompile(`fatal: file .* has only \d+ lines?`)
+
+// checkInvalidation checks if the line of code comment got changed by another commit.
+// If the line got changed the comment is going to be invalidated.
+func checkInvalidation(ctx context.Context, c *issues_model.Comment, doer *user_model.User, repo *git.Repository, branch string) error {
+	// FIXME differentiate between previous and proposed line
+	commit, err := repo.LineBlame(branch, repo.Path, c.TreePath, uint(c.UnsignedLine()))
+	if err != nil && (strings.Contains(err.Error(), "fatal: no such path") || notEnoughLines.MatchString(err.Error())) {
+		c.Invalidated = true
+		return issues_model.UpdateCommentInvalidate(ctx, c)
+	}
+	if err != nil {
+		return err
+	}
+	if c.CommitSHA != "" && c.CommitSHA != commit.ID.String() {
+		c.Invalidated = true
+		return issues_model.UpdateCommentInvalidate(ctx, c)
+	}
+	return nil
+}
+
+// InvalidateCodeComments will lookup the prs for code comments which got invalidated by change
+func InvalidateCodeComments(ctx context.Context, prs issues_model.PullRequestList, doer *user_model.User, repo *git.Repository, branch string) error {
+	if len(prs) == 0 {
+		return nil
+	}
+	issueIDs := prs.GetIssueIDs()
+	var codeComments []*issues_model.Comment
+
+	if err := db.Find(ctx, &issues_model.FindCommentsOptions{
+		ListOptions: db.ListOptions{
+			ListAll: true,
+		},
+		Type:        issues_model.CommentTypeCode,
+		Invalidated: util.OptionalBoolFalse,
+		IssueIDs:    issueIDs,
+	}, &codeComments); err != nil {
+		return fmt.Errorf("find code comments: %v", err)
+	}
+	for _, comment := range codeComments {
+		if err := checkInvalidation(ctx, comment, doer, repo, branch); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 // CreateCodeComment creates a comment on the code line
 func CreateCodeComment(ctx context.Context, doer *user_model.User, gitRepo *git.Repository, issue *issues_model.Issue, line int64, content, treePath string, isReview bool, replyReviewID int64, latestCommitID string) (*issues_model.Comment, error) {
 	var (
@@ -114,8 +161,6 @@ func CreateCodeComment(ctx context.Context, doer *user_model.User, gitRepo *git.
 	return comment, nil
 }
 
-var notEnoughLines = regexp.MustCompile(`exit status 128 - fatal: file .* has only \d+ lines?`)
-
 // createCodeComment creates a plain code comment at the specified line / path
 func createCodeComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, issue *issues_model.Issue, content, treePath string, line, reviewID int64) (*issues_model.Comment, error) {
 	var commitID, patch string