import type { Db } from "../connect";

export interface AclEntry { principal_type: "user" | "group"; principal_id: string }

export function aclRepo(db: Db) {
  return {
    async listForCourse(courseId: string): Promise<AclEntry[]> {
      const rows = await db.sql`SELECT principal_type, principal_id FROM course_acl WHERE course_id = ${courseId} ORDER BY principal_type, principal_id`;
      return rows.map((r: AclEntry) => ({ principal_type: r.principal_type, principal_id: r.principal_id }));
    },
    async isAuthor(courseId: string, userId: string): Promise<boolean> {
      const rows = await db.sql`SELECT 1 AS x FROM course_authors WHERE course_id = ${courseId} AND user_id = ${userId}`;
      return rows.length > 0;
    },
  };
}