<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class FixPrintRequestsForeignKeyAgain extends Migration
{
    public function up()
    {
        if (! $this->db->tableExists('print_requests') || ! $this->db->tableExists('classSection')) {
            return;
        }

        $db = \Config\Database::connect();
        $keys = $db->getForeignKeyData('print_requests');
        foreach ($keys as $key) {
            if ($key->constraint_name === 'print_requests_class_id_foreign') {
                return;
            }
        }

        $this->forge->addForeignKey('class_id', 'classSection', 'class_id', 'CASCADE', 'CASCADE');
        $this->forge->processIndexes('print_requests');
    }

    public function down()
    {
        if (! $this->db->tableExists('print_requests')) {
            return;
        }

        try {
            $this->forge->dropForeignKey('print_requests', 'print_requests_class_id_foreign');
        } catch (\Throwable $e) {
            // Already absent.
        }
    }
}