<?php

namespace Examyou\LaravelInstaller\Middleware;

use Closure;
use Examyou\LaravelInstaller\Helpers\MigrationsHelper;
use Examyou\LaravelInstaller\Middleware\canInstall;

class canUpdate
{
	use MigrationsHelper;


	/**
	 * Handle an incoming request.
	 *
	 * @param  \Illuminate\Http\Request  $request
	 * @param  \Closure  $next
	 * @return mixed
	 */
	public function handle($request, Closure $next)
	{
		$canInstall = new canInstall;

		// if the application has not been installed,
		// redirect to the installer
		if (!$canInstall->alreadyInstalled()) {
			return redirect()->route('LaravelInstaller::welcome');
		}

		if ($this->alreadyUpdated()) {
			abort(404);
		}

		return $next($request);
	}

	/**
	 * If application is already updated.
	 *
	 * @return bool
	 */
	public function alreadyUpdated()
	{
		$migrations = $this->getMigrations();
		$dbMigrations = $this->getExecutedMigrations();

		// If the count of migrations and dbMigrations is equal,
		// then the update as already been updated.
		if (count($migrations) == count($dbMigrations)) {
			return true;
		}

		// Continue, the app needs an update
		return false;
	}
}