<?php

class WebHook
{
	protected $config = [
		'root'             => '',
		'baseDomain'       => 'd.git.verstaem.com/',
		'baseDomainFolder' => '',
		'token'            => 'qefwegwegerhrtherhw'
	];

	protected $data;

	function __construct()
	{
		if (!isset($_SERVER['HTTP_X_GITLAB_TOKEN']) || $_SERVER['HTTP_X_GITLAB_TOKEN'] != $this->config['token']) {
			echo 'Wrong token given';
			return;
		}

		$this->config['root'] = realpath(__DIR__ . '/..') . '/';
		$this->data = json_decode(file_get_contents('php://input'), true);

		if (empty($this->data)) {
			echo 'No data given';
			return;
		}

		if (empty($this->data['ref'])) {
			echo 'No ref';
			return;
		}

		$branch = str_replace('refs/heads/', '', $this->data['ref']);

		if ($branch == 'dev') {
			$domain = $this->config['baseDomain'];
		} else {
			$subDomains = explode('/', $branch);
			$subDomains = array_reverse($subDomains);
			$domain = implode('.', $subDomains) . '.' . $this->config['baseDomain'];
		}

		echo "Branch $branch\r\n";

		$folder = $this->config['root'] . $domain;
		$this->config['baseDomainFolder'] = realpath($this->config['root'] . $this->config['baseDomain']) . '/';

		switch ($branch) {
			case 'master':
				break;

			case 'dev':
				$command = 'cd ' . $folder . ' && git reset --hard && git pull 2>&1';
				echo exec($command, $output, $return_var);
				break;

			default:
				if ($this->data['after'] == '0000000000000000000000000000000000000000') {
					$this->deleteSite($folder, $branch);
				} else {
					$this->updateSite($folder, $branch);
				}
		}
	}

	public function updateSite($folder, $branch)
	{
		if (!is_dir($folder)) {
			mkdir($folder);
			echo "Start site folder copy\r\n";
			if (strpos($this->config['baseDomainFolder'], $this->config['root']) === 0) {
				$command = 'rsync -a ' . $this->config['baseDomainFolder'] . ' ' . $folder . ' --exclude=bitrix/ --exclude=upload/ 2>&1';
				echo exec($command, $output, $return_var);

				echo "Folder copied\r\n";
				symlink($this->config['baseDomainFolder'] . 'bitrix', $folder . 'bitrix');
				symlink($this->config['baseDomainFolder'] . 'upload', $folder . 'upload');
				echo "Symlinks created\r\n";

				echo "Pulling changes from repository:\r\n";
				$command = 'cd ' . $folder . ' && git fetch && git checkout ' . $branch . ' && git reset --hard && git pull 2>&1';
				echo exec($command, $output, $return_var);
			}
		} else {
			$command = 'cd ' . $folder . ' && git reset --hard && git pull 2>&1';
			echo exec($command, $output, $return_var);
		}
	}

	public function deleteSite($folder, $branch)
	{
		if (is_dir($folder)) {
			$command = 'cd ' . $this->config['baseDomainFolder'];
			$command .= ' && git branch -d ' . $branch . ' 2>&1';
			echo exec($command, $output, $return_var);

			$command = 'rm -R ' . $folder . ' 2>&1';
			echo exec($command, $output, $return_var);
		} else {
			echo "Site don't exist\r\n";
		}
	}

}

$webHook = new WebHook();