FEAT: Discovery Video Service Subscription

cms/internal/db/repositories/videos.go

@@ -21,25 +21,52 @@ var VideoRepo VideoRepository
 // is cleared along with the status. It returns ErrVideoNotFound when no video
 // carries that job id, which the consumer treats as a message to drop rather
 // than a fault.
-func (svc VideoRepository) UpdateVideoOutcomeByJobID(ctx context.Context, jobID string, status models.VideoStatus, playbackURL string) error {
-	result, err := svc.SQLDB.ExecContext(ctx, `
+//
+// It returns the video it updated, carrying the members an announcement is
+// built from — the row's id and title, and the names of the categories it is
+// filed under. The consumer would otherwise have to read back what it just
+// wrote, and reading it here keeps that SQL on this side of the seam.
+func (svc VideoRepository) UpdateVideoOutcomeByJobID(ctx context.Context, jobID string, status models.VideoStatus, playbackURL string) (models.Video, error) {
+	updated := models.Video{
+		Status:            status,
+		PlaybackURL:       playbackURL,
+		MediaConvertJobID: jobID,
+	}
+
+	err := svc.SQLDB.QueryRowContext(ctx, `
 		UPDATE videos
 		SET status = $1, playback_url = $2, updated_at = now()
 		WHERE mediaconvert_job_id = $3
-	`, string(status), playbackURL, jobID)
+		RETURNING id, title
+	`, string(status), playbackURL, jobID).Scan(&updated.ID, &updated.Title)
+	if errors.Is(err, sql.ErrNoRows) {
+		return models.Video{}, ErrVideoNotFound
+	}
 	if err != nil {
-		return err
+		return models.Video{}, err
 	}
 
-	affected, err := result.RowsAffected()
+	rows, err := svc.SQLDB.QueryContext(ctx, `
+		SELECT c.name
+		FROM video_categories vc
+		JOIN categories c ON c.id = vc.category_id
+		WHERE vc.video_id = $1
+		ORDER BY c.name
+	`, updated.ID)
 	if err != nil {
-		return err
+		return models.Video{}, err
 	}
-	if affected == 0 {
-		return ErrVideoNotFound
+	defer rows.Close()
+
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return models.Video{}, err
+		}
+		updated.CategoryNames = append(updated.CategoryNames, name)
 	}
 
-	return nil
+	return updated, rows.Err()
 }
 
 // GetVideoByID reads one video and the ids of the categories it is filed