Workaround to clean up old reviews on creating a new one (#28554)

close  #28542

blocks  #28544

---
*Sponsored by Kithara Software GmbH*

3 files changed, 165 insertions, 9 deletions

diff --git a/models/issues/review.go b/models/issues/review.go
index 3aa9d3e2a8..fc110630e0 100644
--- a/models/issues/review.go
+++ b/models/issues/review.go
@@ -292,8 +292,14 @@ func IsOfficialReviewerTeam(ctx context.Context, issue *Issue, team *organizatio
 
 // CreateReview creates a new review based on opts
 func CreateReview(ctx context.Context, opts CreateReviewOptions) (*Review, error) {
+	ctx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer committer.Close()
+	sess := db.GetEngine(ctx)
+
 	review := &Review{
-		Type:         opts.Type,
 		Issue:        opts.Issue,
 		IssueID:      opts.Issue.ID,
 		Reviewer:     opts.Reviewer,
@@ -303,15 +309,39 @@ func CreateReview(ctx context.Context, opts CreateReviewOptions) (*Review, error
 		CommitID:     opts.CommitID,
 		Stale:        opts.Stale,
 	}
+
 	if opts.Reviewer != nil {
+		review.Type = opts.Type
 		review.ReviewerID = opts.Reviewer.ID
-	} else {
-		if review.Type != ReviewTypeRequest {
-			review.Type = ReviewTypeRequest
+
+		reviewCond := builder.Eq{"reviewer_id": opts.Reviewer.ID, "issue_id": opts.Issue.ID}
+		// make sure user review requests are cleared
+		if opts.Type != ReviewTypePending {
+			if _, err := sess.Where(reviewCond.And(builder.Eq{"type": ReviewTypeRequest})).Delete(new(Review)); err != nil {
+				return nil, err
+			}
 		}
+		// make sure if the created review gets dismissed no old review surface
+		// other types can be ignored, as they don't affect branch protection
+		if opts.Type == ReviewTypeApprove || opts.Type == ReviewTypeReject {
+			if _, err := sess.Where(reviewCond.And(builder.In("type", ReviewTypeApprove, ReviewTypeReject))).
+				Cols("dismissed").Update(&Review{Dismissed: true}); err != nil {
+				return nil, err
+			}
+		}
+
+	} else if opts.ReviewerTeam != nil {
+		review.Type = ReviewTypeRequest
 		review.ReviewerTeamID = opts.ReviewerTeam.ID
+
+	} else {
+		return nil, fmt.Errorf("provide either reviewer or reviewer team")
+	}
+
+	if _, err := sess.Insert(review); err != nil {
+		return nil, err
 	}
-	return review, db.Insert(ctx, review)
+	return review, committer.Commit()
 }
 
 // GetCurrentReview returns the current pending review of reviewer for given issue
diff --git a/models/unittest/unit_tests.go b/models/unittest/unit_tests.go
index d47bceea1e..75898436fc 100644
--- a/models/unittest/unit_tests.go
+++ b/models/unittest/unit_tests.go
@@ -131,8 +131,8 @@ func AssertSuccessfulInsert(t assert.TestingT, beans ...any) {
 }
 
 // AssertCount assert the count of a bean
-func AssertCount(t assert.TestingT, bean, expected any) {
-	assert.EqualValues(t, expected, GetCount(t, bean))
+func AssertCount(t assert.TestingT, bean, expected any) bool {
+	return assert.EqualValues(t, expected, GetCount(t, bean))
 }
 
 // AssertInt64InRange assert value is in range [low, high]
@@ -150,7 +150,7 @@ func GetCountByCond(t assert.TestingT, tableName string, cond builder.Cond) int6
 }
 
 // AssertCountByCond test the count of database entries matching bean
-func AssertCountByCond(t assert.TestingT, tableName string, cond builder.Cond, expected int) {
-	assert.EqualValues(t, expected, GetCountByCond(t, tableName, cond),
+func AssertCountByCond(t assert.TestingT, tableName string, cond builder.Cond, expected int) bool {
+	return assert.EqualValues(t, expected, GetCountByCond(t, tableName, cond),
 		"Failed consistency test, the counted bean (of table %s) was %+v", tableName, cond)
 }
diff --git a/tests/integration/api_pull_review_test.go b/tests/integration/api_pull_review_test.go
index daa136b21e..ab6d33cd5b 100644
--- a/tests/integration/api_pull_review_test.go
+++ b/tests/integration/api_pull_review_test.go
@@ -13,11 +13,14 @@ import (
 	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/json"
 	api "code.gitea.io/gitea/modules/structs"
+	issue_service "code.gitea.io/gitea/services/issue"
 	"code.gitea.io/gitea/tests"
 
 	"github.com/stretchr/testify/assert"
+	"xorm.io/builder"
 )
 
 func TestAPIPullReview(t *testing.T) {
@@ -314,3 +317,126 @@ func TestAPIPullReviewRequest(t *testing.T) {
 		AddTokenAuth(token)
 	MakeRequest(t, req, http.StatusNoContent)
 }
+
+func TestAPIPullReviewStayDismissed(t *testing.T) {
+	// This test against issue https://github.com/go-gitea/gitea/issues/28542
+	// where old reviews surface after a review request got dismissed.
+	defer tests.PrepareTestEnv(t)()
+	pullIssue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 3})
+	assert.NoError(t, pullIssue.LoadAttributes(db.DefaultContext))
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: pullIssue.RepoID})
+	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+	session2 := loginUser(t, user2.LoginName)
+	token2 := getTokenForLoggedInUser(t, session2, auth_model.AccessTokenScopeWriteRepository)
+	user8 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 8})
+	session8 := loginUser(t, user8.LoginName)
+	token8 := getTokenForLoggedInUser(t, session8, auth_model.AccessTokenScopeWriteRepository)
+
+	// user2 request user8
+	req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/requested_reviewers", repo.OwnerName, repo.Name, pullIssue.Index), &api.PullReviewRequestOptions{
+		Reviewers: []string{user8.LoginName},
+	}).AddTokenAuth(token2)
+	MakeRequest(t, req, http.StatusCreated)
+
+	reviewsCountCheck(t,
+		"check we have only one review request",
+		pullIssue.ID, user8.ID, 0, 1, 1, false)
+
+	// user2 request user8 again, it is expected to be ignored
+	req = NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/requested_reviewers", repo.OwnerName, repo.Name, pullIssue.Index), &api.PullReviewRequestOptions{
+		Reviewers: []string{user8.LoginName},
+	}).AddTokenAuth(token2)
+	MakeRequest(t, req, http.StatusCreated)
+
+	reviewsCountCheck(t,
+		"check we have only one review request, even after re-request it again",
+		pullIssue.ID, user8.ID, 0, 1, 1, false)
+
+	// user8 reviews it as accept
+	req = NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/reviews", repo.OwnerName, repo.Name, pullIssue.Index), &api.CreatePullReviewOptions{
+		Event: "APPROVED",
+		Body:  "lgtm",
+	}).AddTokenAuth(token8)
+	MakeRequest(t, req, http.StatusOK)
+
+	reviewsCountCheck(t,
+		"check we have one valid approval",
+		pullIssue.ID, user8.ID, 0, 0, 1, true)
+
+	// emulate of auto-dismiss lgtm on a protected branch that where a pull just got an update
+	_, err := db.GetEngine(db.DefaultContext).Where("issue_id = ? AND reviewer_id = ?", pullIssue.ID, user8.ID).
+		Cols("dismissed").Update(&issues_model.Review{Dismissed: true})
+	assert.NoError(t, err)
+
+	// user2 request user8 again
+	req = NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/requested_reviewers", repo.OwnerName, repo.Name, pullIssue.Index), &api.PullReviewRequestOptions{
+		Reviewers: []string{user8.LoginName},
+	}).AddTokenAuth(token2)
+	MakeRequest(t, req, http.StatusCreated)
+
+	reviewsCountCheck(t,
+		"check we have no valid approval and one review request",
+		pullIssue.ID, user8.ID, 1, 1, 2, false)
+
+	// user8 dismiss review
+	_, err = issue_service.ReviewRequest(db.DefaultContext, pullIssue, user8, user8, false)
+	assert.NoError(t, err)
+
+	reviewsCountCheck(t,
+		"check new review request is now dismissed",
+		pullIssue.ID, user8.ID, 1, 0, 1, false)
+
+	// add a new valid approval
+	req = NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/reviews", repo.OwnerName, repo.Name, pullIssue.Index), &api.CreatePullReviewOptions{
+		Event: "APPROVED",
+		Body:  "lgtm",
+	}).AddTokenAuth(token8)
+	MakeRequest(t, req, http.StatusOK)
+
+	reviewsCountCheck(t,
+		"check that old reviews requests are deleted",
+		pullIssue.ID, user8.ID, 1, 0, 2, true)
+
+	// now add a change request witch should dismiss the approval
+	req = NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls/%d/reviews", repo.OwnerName, repo.Name, pullIssue.Index), &api.CreatePullReviewOptions{
+		Event: "REQUEST_CHANGES",
+		Body:  "please change XYZ",
+	}).AddTokenAuth(token8)
+	MakeRequest(t, req, http.StatusOK)
+
+	reviewsCountCheck(t,
+		"check that old reviews are dismissed",
+		pullIssue.ID, user8.ID, 2, 0, 3, false)
+}
+
+func reviewsCountCheck(t *testing.T, name string, issueID, reviewerID int64, expectedDismissed, expectedRequested, expectedTotal int, expectApproval bool) {
+	t.Run(name, func(t *testing.T) {
+		unittest.AssertCountByCond(t, "review", builder.Eq{
+			"issue_id":    issueID,
+			"reviewer_id": reviewerID,
+			"dismissed":   true,
+		}, expectedDismissed)
+
+		unittest.AssertCountByCond(t, "review", builder.Eq{
+			"issue_id":    issueID,
+			"reviewer_id": reviewerID,
+		}, expectedTotal)
+
+		unittest.AssertCountByCond(t, "review", builder.Eq{
+			"issue_id":    issueID,
+			"reviewer_id": reviewerID,
+			"type":        issues_model.ReviewTypeRequest,
+		}, expectedRequested)
+
+		approvalCount := 0
+		if expectApproval {
+			approvalCount = 1
+		}
+		unittest.AssertCountByCond(t, "review", builder.Eq{
+			"issue_id":    issueID,
+			"reviewer_id": reviewerID,
+			"type":        issues_model.ReviewTypeApprove,
+			"dismissed":   false,
+		}, approvalCount)
+	})
+}