Replies to outdated code comments should also be outdated (#13217)

* When replying to an outdated comment it should not appear on the files page

This happened because the comment took the latest commitID as its base instead of the
reviewID that it was replying to.

There was also no way of creating an already outdated comment - and a
reply to a review on an outdated line should be outdated.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix test

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

models/issue_comment.go

@@ -712,6 +712,7 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 		RefAction:        opts.RefAction,
 		RefIsPull:        opts.RefIsPull,
 		IsForcePush:      opts.IsForcePush,
+		Invalidated:      opts.Invalidated,
 	}
 	if _, err = e.Insert(comment); err != nil {
 		return nil, err
@@ -878,6 +879,7 @@ type CreateCommentOptions struct {
 	RefAction        references.XRefAction
 	RefIsPull        bool
 	IsForcePush      bool
+	Invalidated      bool
 }
 
 // CreateComment creates comment of issue or commit.
@@ -953,6 +955,8 @@ type FindCommentsOptions struct {
 	ReviewID int64
 	Since    int64
 	Before   int64
+	Line     int64
+	TreePath string
 	Type     CommentType
 }
 
@@ -976,6 +980,12 @@ func (opts *FindCommentsOptions) toConds() builder.Cond {
 	if opts.Type != CommentTypeUnknown {
 		cond = cond.And(builder.Eq{"comment.type": opts.Type})
 	}
+	if opts.Line > 0 {
+		cond = cond.And(builder.Eq{"comment.line": opts.Line})
+	}
+	if len(opts.TreePath) > 0 {
+		cond = cond.And(builder.Eq{"comment.tree_path": opts.TreePath})
+	}
 	return cond
 }
 
@@ -990,6 +1000,8 @@ func findComments(e Engine, opts FindCommentsOptions) ([]*Comment, error) {
 		sess = opts.setSessionPagination(sess)
 	}
 
+	// WARNING: If you change this order you will need to fix createCodeComment
+
 	return comments, sess.
 		Asc("comment.created_unix").
 		Asc("comment.id").

models/migrations/migrations.go

@@ -250,6 +250,8 @@ var migrations = []Migration{
 	NewMigration("fix publisher ID for tag releases", fixPublisherIDforTagReleases),
 	// v157 -> v158
 	NewMigration("ensure repo topics are up-to-date", fixRepoTopics),
+	// v158 -> v159
+	NewMigration("code comment replies should have the commitID of the review they are replying to", updateCodeCommentReplies),
 }
 
 // GetCurrentDBVersion returns the current db version

models/migrations/v158.go

@@ -0,0 +1,78 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"code.gitea.io/gitea/modules/log"
+
+	"xorm.io/xorm"
+)
+
+func updateCodeCommentReplies(x *xorm.Engine) error {
+	type Comment struct {
+		ID          int64  `xorm:"pk autoincr"`
+		CommitSHA   string `xorm:"VARCHAR(40)"`
+		Patch       string `xorm:"TEXT patch"`
+		Invalidated bool
+
+		// Not extracted but used in the below query
+		Type     int   `xorm:"INDEX"`
+		Line     int64 // - previous line / + proposed line
+		TreePath string
+		ReviewID int64 `xorm:"index"`
+	}
+
+	if err := x.Sync2(new(Comment)); err != nil {
+		return err
+	}
+
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	var start = 0
+	var batchSize = 100
+	for {
+		var comments = make([]*Comment, 0, batchSize)
+		if err := sess.SQL(`SELECT comment.id as id, first.commit_sha as commit_sha, first.patch as patch, first.invalidated as invalidated
+		FROM comment INNER JOIN (
+			SELECT C.id, C.review_id, C.line, C.tree_path, C.patch, C.commit_sha, C.invalidated
+			FROM comment AS C 
+			WHERE C.type = 21
+				AND C.created_unix = 
+					(SELECT MIN(comment.created_unix)
+						FROM comment
+						WHERE comment.review_id = C.review_id
+						AND comment.type = 21
+						AND comment.line = C.line
+						AND comment.tree_path = C.tree_path)
+			) AS first
+			ON comment.review_id = first.review_id
+				AND comment.tree_path = first.tree_path AND comment.line = first.line
+		WHERE comment.type = 21
+			AND comment.id != first.id
+			AND comment.commit_sha != first.commit_sha`).Limit(batchSize, start).Find(&comments); err != nil {
+			log.Error("failed to select: %v", err)
+			return err
+		}
+
+		for _, comment := range comments {
+			if _, err := sess.Table("comment").Cols("commit_sha", "patch", "invalidated").Update(comment); err != nil {
+				log.Error("failed to update comment[%d]: %v %v", comment.ID, comment, err)
+				return err
+			}
+		}
+
+		start += len(comments)
+
+		if len(comments) < batchSize {
+			break
+		}
+	}
+
+	return sess.Commit()
+}

services/pull/review.go

@@ -122,27 +122,61 @@ func createCodeComment(doer *models.User, repo *models.Repository, issue *models
 	}
 	defer gitRepo.Close()
 
+	invalidated := false
+	head := pr.GetGitRefName()
+	if line > 0 {
+		if reviewID != 0 {
+			first, err := models.FindComments(models.FindCommentsOptions{
+				ReviewID: reviewID,
+				Line:     line,
+				TreePath: treePath,
+				Type:     models.CommentTypeCode,
+				ListOptions: models.ListOptions{
+					PageSize: 1,
+					Page:     1,
+				},
+			})
+			if err == nil && len(first) > 0 {
+				commitID = first[0].CommitSHA
+				invalidated = first[0].Invalidated
+				patch = first[0].Patch
+			} else if err != nil && !models.IsErrCommentNotExist(err) {
+				return nil, fmt.Errorf("Find first comment for %d line %d path %s. Error: %v", reviewID, line, treePath, err)
+			} else {
+				review, err := models.GetReviewByID(reviewID)
+				if err == nil && len(review.CommitID) > 0 {
+					head = review.CommitID
+				} else if err != nil && !models.IsErrReviewNotExist(err) {
+					return nil, fmt.Errorf("GetReviewByID %d. Error: %v", reviewID, err)
+				}
+			}
+		}
+
+		if len(commitID) == 0 {
 			// FIXME validate treePath
 			// Get latest commit referencing the commented line
 			// No need for get commit for base branch changes
-	if line > 0 {
-		commit, err := gitRepo.LineBlame(pr.GetGitRefName(), gitRepo.Path, treePath, uint(line))
+			commit, err := gitRepo.LineBlame(head, gitRepo.Path, treePath, uint(line))
 			if err == nil {
 				commitID = commit.ID.String()
 			} else if !(strings.Contains(err.Error(), "exit status 128 - fatal: no such path") || notEnoughLines.MatchString(err.Error())) {
 				return nil, fmt.Errorf("LineBlame[%s, %s, %s, %d]: %v", pr.GetGitRefName(), gitRepo.Path, treePath, line, err)
 			}
 		}
+	}
 
 	// Only fetch diff if comment is review comment
-	if reviewID != 0 {
-		headCommitID, err := gitRepo.GetRefCommitID(pr.GetGitRefName())
+	if len(patch) == 0 && reviewID != 0 {
+		if len(commitID) == 0 {
+			commitID, err = gitRepo.GetRefCommitID(pr.GetGitRefName())
 			if err != nil {
 				return nil, fmt.Errorf("GetRefCommitID[%s]: %v", pr.GetGitRefName(), err)
 			}
+		}
+
 		patchBuf := new(bytes.Buffer)
-		if err := git.GetRepoRawDiffForFile(gitRepo, pr.MergeBase, headCommitID, git.RawDiffNormal, treePath, patchBuf); err != nil {
-			return nil, fmt.Errorf("GetRawDiffForLine[%s, %s, %s, %s]: %v", err, gitRepo.Path, pr.MergeBase, headCommitID, treePath)
+		if err := git.GetRepoRawDiffForFile(gitRepo, pr.MergeBase, commitID, git.RawDiffNormal, treePath, patchBuf); err != nil {
+			return nil, fmt.Errorf("GetRawDiffForLine[%s, %s, %s, %s]: %v", gitRepo.Path, pr.MergeBase, commitID, treePath, err)
 		}
 		patch = git.CutDiffAroundLine(patchBuf, int64((&models.Comment{Line: line}).UnsignedLine()), line < 0, setting.UI.CodeCommentLines)
 	}
@@ -157,6 +191,7 @@ func createCodeComment(doer *models.User, repo *models.Repository, issue *models
 		CommitSHA:   commitID,
 		ReviewID:    reviewID,
 		Patch:       patch,
+		Invalidated: invalidated,
 	})
 }