Fix viewed files number is not right if not all files loaded (#35821)

Fix #35803

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: silverwind <me@silverwind.io>

models/pull/review_state.go

@@ -49,6 +49,19 @@ func init() {
 	db.RegisterModel(new(ReviewState))
 }
 
+func (rs *ReviewState) GetViewedFileCount() int {
+	if len(rs.UpdatedFiles) == 0 {
+		return 0
+	}
+	var numViewedFiles int
+	for _, state := range rs.UpdatedFiles {
+		if state == Viewed {
+			numViewedFiles++
+		}
+	}
+	return numViewedFiles
+}
+
 // GetReviewState returns the ReviewState with all given values prefilled, whether or not it exists in the database.
 // If the review didn't exist before in the database, it won't afterwards either.
 // The returned boolean shows whether the review exists in the database

routers/web/repo/pull.go

@@ -782,12 +782,16 @@ func viewPullFiles(ctx *context.Context, beforeCommitID, afterCommitID string) {
 	// as the viewed information is designed to be loaded only on latest PR
 	// diff and if you're signed in.
 	var reviewState *pull_model.ReviewState
+	var numViewedFiles int
 	if ctx.IsSigned && isShowAllCommits {
 		reviewState, err = gitdiff.SyncUserSpecificDiff(ctx, ctx.Doer.ID, pull, gitRepo, diff, diffOptions)
 		if err != nil {
 			ctx.ServerError("SyncUserSpecificDiff", err)
 			return
 		}
+		if reviewState != nil {
+			numViewedFiles = reviewState.GetViewedFileCount()
+		}
 	}
 
 	diffShortStat, err := gitdiff.GetDiffShortStat(ctx, ctx.Repo.Repository, ctx.Repo.GitRepo, beforeCommitID, afterCommitID)
@@ -796,10 +800,11 @@ func viewPullFiles(ctx *context.Context, beforeCommitID, afterCommitID string) {
 		return
 	}
 	ctx.Data["DiffShortStat"] = diffShortStat
+	ctx.Data["NumViewedFiles"] = numViewedFiles
 
 	ctx.PageData["prReview"] = map[string]any{
 		"numberOfFiles":       diffShortStat.NumFiles,
-		"numberOfViewedFiles": diff.NumViewedFiles,
+		"numberOfViewedFiles": numViewedFiles,
 	}
 
 	if err = diff.LoadComments(ctx, issue, ctx.Doer, ctx.Data["ShowOutdatedComments"].(bool)); err != nil {

services/gitdiff/gitdiff.go

@@ -520,10 +520,9 @@ func getCommitFileLineCountAndLimitedContent(commit *git.Commit, filePath string
 
 // Diff represents a difference between two git trees.
 type Diff struct {
-	Start, End     string
+	Start, End   string
-	Files          []*DiffFile
+	Files        []*DiffFile
-	IsIncomplete   bool
+	IsIncomplete bool
-	NumViewedFiles int // user-specific
 }
 
 // LoadComments loads comments into each line
@@ -1412,7 +1411,6 @@ outer:
 		// Check whether the file has already been viewed
 		if fileViewedState == pull_model.Viewed {
 			diffFile.IsViewed = true
-			diff.NumViewedFiles++
 		}
 	}
 

templates/repo/diff/box.tmpl

@@ -27,9 +27,9 @@
 			{{if and .PageIsPullFiles $.SignedUserID (not .DiffNotAvailable)}}
 				<div class="not-mobile tw-flex tw-items-center tw-flex-col tw-whitespace-nowrap tw-mr-1">
 					<label for="viewed-files-summary" id="viewed-files-summary-label" data-text-changed-template="{{ctx.Locale.Tr "repo.pulls.viewed_files_label"}}">
-						{{ctx.Locale.Tr "repo.pulls.viewed_files_label" .Diff.NumViewedFiles .DiffShortStat.NumFiles}}
+						{{ctx.Locale.Tr "repo.pulls.viewed_files_label" .NumViewedFiles .DiffShortStat.NumFiles}}
 					</label>
-					<progress id="viewed-files-summary" value="{{.Diff.NumViewedFiles}}" max="{{.DiffShortStat.NumFiles}}"></progress>
+					<progress id="viewed-files-summary" value="{{.NumViewedFiles}}" max="{{.DiffShortStat.NumFiles}}"></progress>
 				</div>
 			{{end}}
 			{{template "repo/diff/whitespace_dropdown" .}}