<?php

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

class CreateDataTablesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('data_tables', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
	        $table->unsignedInteger('owner_id');
	        $table->unsignedInteger('parent_data_table_id')->nullable();
	        $table->string('title');
	        $table->string('license');

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

	        $table->foreign('parent_data_table_id')
		        ->references('id')->on('data_tables')
		        ->onDelete('set null');
        });

	    Schema::create('table_revisions', function (Blueprint $table) {
		    $table->increments('id');
		    $table->timestamps();
		    $table->boolean('approved');
		    $table->unsignedInteger('data_table_id');
		    $table->unsignedInteger('parent_revision_id')->nullable();
		    $table->unsignedInteger('author_id')->nullable();
		    $table->longText('content');

		    $table->foreign('data_table_id')
			    ->references('id')->on('data_tables')
			    ->onDelete('cascade');

		    $table->foreign('parent_revision_id')
			    ->references('id')->on('table_revisions')
			    ->onDelete('set null');

		    $table->foreign('author_id')
			    ->references('id')->on('users')
			    ->onDelete('set null');
	    });
    }

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