"use strict";

/**
 * Replace all junction rows for a course in one shot (delete + bulk create).
 */
async function syncJunction(Model, courseId, ids, fkField, transaction) {
  await Model.destroy({ where: { course_id: courseId }, transaction });
  if (ids?.length) {
    await Model.bulkCreate(
      ids.map((id) => ({ course_id: courseId, [fkField]: id })),
      { transaction }
    );
  }
}

module.exports = { syncJunction };