<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class ExtendStaffAttendanceForTeachers extends Migration
{
    public function up()
    {
        $this->forge->addColumn('staff_attendance', [
            'class_section_id' => [
                'type'       => 'INT',
                'constraint' => 11,
                'unsigned'   => true,
                'null'       => true,
                'after'      => 'user_id',
            ],
            'position' => [
                'type'       => 'ENUM',
                'constraint' => ['main','ta'],
                'null'       => true,
                'after'      => 'class_section_id',
            ],
        ]);

        // Unique constraint: 1 record per user per date
        $this->db->query("
            ALTER TABLE staff_attendance
            ADD UNIQUE KEY uniq_user_date (user_id, date)
        ");
    }

    public function down()
    {
        $this->forge->dropColumn('staff_attendance', 'class_section_id');
        $this->forge->dropColumn('staff_attendance', 'position');
        $this->db->query("ALTER TABLE staff_attendance DROP INDEX uniq_user_date");
    }
}
