<?php
  /**
   * Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OC;
  
  use OC\Hooks\BasicEmitter;

  use OC\Hooks\Emitter;

  
  class Repair extends BasicEmitter {
  	/**

  	 * @var RepairStep[]
  	 **/
  	private $repairSteps;
  
  	/**
  	 * Creates a new repair step runner
  	 *
  	 * @param array $repairSteps array of RepairStep instances
  	 */
  	public function __construct($repairSteps = array()) {
  		$this->repairSteps = $repairSteps;
  	}
  
  	/**
  	 * Run a series of repair steps for common problems

  	 */
  	public function run() {

  		$self = $this;
  		if (count($this->repairSteps) === 0) {
  			$this->emit('\OC\Repair', 'info', array('No repair steps available'));
  			return;
  		}
  		// run each repair step
  		foreach ($this->repairSteps as $step) {
  			$this->emit('\OC\Repair', 'step', array($step->getName()));
  
  			if ($step instanceof Emitter) {
  				$step->listen('\OC\Repair', 'warning', function ($description) use ($self) {
  					$self->emit('\OC\Repair', 'warning', array($description));
  				});
  				$step->listen('\OC\Repair', 'info', function ($description) use ($self) {
  					$self->emit('\OC\Repair', 'info', array($description));
  				});
  			}
  
  			$step->run();
  		}
  	}
  
  	/**
  	 * Add repair step
  	 *
  	 * @param RepairStep $repairStep repair step
  	 */
  	public function addStep($repairStep) {
  		$this->repairSteps[] = $repairStep;
  	}
  
  	/**
  	 * Returns the default repair steps to be run on the
  	 * command line or after an upgrade.
  	 *
  	 * @return array of RepairStep instances
  	 */
  	public static function getRepairSteps() {
  		return array(
  			new \OC\Repair\RepairMimeTypes()
  		);
  	}
  
  	/**
  	 * Returns the repair steps to be run before an
  	 * upgrade.
  	 *
  	 * @return array of RepairStep instances
  	 */
  	public static function getBeforeUpgradeRepairSteps() {
  		return array(
  			new \OC\Repair\InnoDB(),
  			new \OC\Repair\Collation(\OC::$server->getConfig(), \OC_DB::getConnection())
  		);
  	}
  
  	/**
  	 * {@inheritDoc}
  	 *
  	 * Redeclared as public to allow invocation from within the closure above in php 5.3
  	 */
  	public function emit($scope, $method, $arguments = array()) {
  		parent::emit($scope, $method, $arguments);

  	}
  }