<?php

$subscription = file_get_contents('php://input');

$file = dirname(__FILE__) . '/tmp/log_' . date('YmdHis') . '.txt';

if ($subscription) {
    $subscription = json_decode($subscription, true);
    $data = base64_decode($subscription['message']['data']);
    file_put_contents($file, $data);

    $data = json_decode($data, true);
    $conf = json_decode(file_get_contents('./repositories.json'), true);
    $user = $conf['user'];
    $repositories = $conf['repositories'];

    if (array_key_exists($data['name'], $repositories)) {
        $repo = $repositories[$data['name']];

        // 最初のキー(refName)を取得
        $ref = '';
        reset($data['refUpdateEvent']['refUpdates']);
        $firstKey = key($data['refUpdateEvent']['refUpdates']);
        foreach ($data['refUpdateEvent']['refUpdates'] as $key => $value) {
            if ($key === $firstKey) {
                $ref = $key;
                break;
            }
        }

        $branch = end(explode('/', $ref));
        $updateType = $data['refUpdateEvent']['refUpdates'][$ref]['updateType'];

        if ($updateType == 'UPDATE_FAST_FORWARD') {
            if (array_key_exists($branch, $repo['path'])) {
                foreach ($repo['path'][$branch] as $path) {
                    file_put_contents($file, $path, FILE_APPEND);
                    file_put_contents($file, $branch, FILE_APPEND);

                    if (chdir($path)) {
                        $cmd = 'sudo -u ' . $user . ' git pull origin ' . $branch;
                        $output = shell_exec($cmd);

                        file_put_contents($file, $output, FILE_APPEND);
                    }
                }
            }
        }
    }
}