<?php

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

class CreateActivitiesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('activities', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('business_id');
            $table->unsignedBigInteger('project_id')->nullable();
            $table->unsignedBigInteger('system_id')->nullable();
            $table->unsignedBigInteger('workflow_id')->nullable();
            $table->unsignedBigInteger('status_id')->nullable();
            $table->unsignedBigInteger('sprint_id')->nullable();
            $table->unsignedBigInteger('task_id')->nullable();
            $table->unsignedBigInteger('subject_id')->nullable();//row id
            $table->unsignedBigInteger('actor_id');
            $table->unsignedBigInteger('user_id')->nullable();
            $table->unsignedBigInteger('crud_id')->nullable();
            $table->unsignedBigInteger('table_id')->nullable();
            $table->json('original')->nullable(); // a unique identifier that represent the type of action
            $table->json('diff')->nullable(); // all data that has been changed
            $table->timestamps();
        });
    }

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