<?php

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

class CreateNotificationsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('notifications', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->boolean('seen');
            $table->unsignedInteger('user_id')->index();
            $table->unsignedInteger('actor_id')->index()->nullable(); // who did it
            $table->string('action'); // what happened, e.g.: favourited, mentioned, forked, commented
            $table->nullableMorphs('context'); // the action target or context

            $table->foreign('actor_id')->references('id')->on('users')
                ->onDelete('cascade');

            $table->foreign('user_id')->references('id')->on('users')
                ->onDelete('cascade');
        });
    }

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