Show review summary in pull requests (#5132)

models/review.go

@@ -255,3 +255,36 @@ func UpdateReview(r *Review) error {
 	}
 	return nil
 }
+
+// PullReviewersWithType represents the type used to display a review overview
+type PullReviewersWithType struct {
+	User              `xorm:"extends"`
+	Type              ReviewType
+	ReviewUpdatedUnix util.TimeStamp `xorm:"review_updated_unix"`
+}
+
+// GetReviewersByPullID gets all reviewers for a pull request with the statuses
+func GetReviewersByPullID(pullID int64) (issueReviewers []*PullReviewersWithType, err error) {
+	irs := []*PullReviewersWithType{}
+	err = x.Select("`user`.*, review.type, max(review.updated_unix) as review_updated_unix").
+		Table("review").
+		Join("INNER", "`user`", "review.reviewer_id = `user`.id").
+		Where("review.issue_id = ? AND (review.type = ? OR review.type = ?)", pullID, ReviewTypeApprove, ReviewTypeReject).
+		GroupBy("`user`.id, review.type").
+		OrderBy("review_updated_unix DESC").
+		Find(&irs)
+
+	// We need to group our results by user id _and_ review type, otherwise the query fails when using postgresql.
+	// But becaus we're doing this, we need to manually filter out multiple reviews of different types by the
+	// same person because we only want to show the newest review grouped by user. Thats why we're using a map here.
+	issueReviewers = []*PullReviewersWithType{}
+	usersInArray := make(map[int64]bool)
+	for _, ir := range irs {
+		if !usersInArray[ir.ID] {
+			issueReviewers = append(issueReviewers, ir)
+			usersInArray[ir.ID] = true
+		}
+	}
+
+	return
+}