<?php
/**
* PHPCI - Continuous Integration for PHP
*
* @copyright    Copyright 2013, Block 8 Limited.
* @license      https://github.com/Block8/PHPCI/blob/master/LICENSE.md
* @link         http://www.phptesting.org/
*/

namespace PHPCI\Model\Build;
use PHPCI\Model\Build,
	PHPCI\Builder,
	Symfony\Component\Yaml\Parser as YamlParser;

/**
* Remote Git Build Model
* @author       Dan Cryer <dan@block8.co.uk>
* @package      PHPCI
* @subpackage   Core
*/
abstract class RemoteGitBuild extends Build
{
	abstract protected function getCloneUrl();

	public function createWorkingCopy(Builder $builder, $buildPath)
	{
		$yamlParser	= new YamlParser();
		$success	= true;
		$key		= trim($this->getProject()->getGitKey());

		if(!empty($key)) {
			$success = $this->cloneBySsh($builder, $buildPath);
		}
		else {
			$success = $this->cloneByHttp($builder, $buildPath);
		}

		if(!$success) {
			$builder->logFailure('Failed to clone remote git repository.');
			return false;
		}

		if(!is_file($buildPath . 'phpci.yml')) {
			$builder->logFailure('Project does not contain a phpci.yml file.');
			return false;
		}

		$yamlFile = file_get_contents($buildPath . 'phpci.yml');
		$builder->setConfigArray($yamlParser->parse($yamlFile));

		return true;
	}

	protected function cloneByHttp(Builder $builder, $to)
	{
		return $builder->executeCommand('git clone -b %s %s "%s"', $this->getBranch(), $this->getCloneUrl(), $to);
	}

	protected function cloneBySsh(Builder $builder, $to)
	{
		// Copy the project's keyfile to disk:
		$keyFile = realpath($to) . '.key';
		file_put_contents($keyFile, $this->getProject()->getGitKey());
		chmod($keyFile, 0600);

		// Use the key file to do an SSH clone:
		$success = $builder->executeCommand('ssh-agent ssh-add "%s" && git clone -b %s %s "%s" && ssh-agent -k', $keyFile, $build->getBranch(), $this->getCloneUrl(), $to);
		
		// Remove the key file:
		unlink($keyFile);

		return $success;
	}
}