<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreatePermissionsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('permissions', function (Blueprint $table) {
            $table->id();
            $table->unsignedInteger('user_id');
            $table->unsignedInteger('program_id');
            $table->timestamp('expiration_time')->nullable();
            $table->unsignedInteger('max_session_count')->default(1);
            
            $table->unique(['user_id', 'program_id'], 'user_id');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('permissions');
    }
}