traces

#!/usr/bin/env php
<?php
function includeIfExists($file)
{
    if (file_exists($file)) {
        return include $file;
    }
}

if ((!$loader = includeIfExists(__DIR__.'/vendor/autoload.php')) && (!$loader = includeIfExists(__DIR__.'/../../autoload.php'))) {
    die('You must set up the project dependencies, run the following commands:'.PHP_EOL.
        'curl -sS https://getcomposer.org/installer | php'.PHP_EOL.
        'php composer.phar install'.PHP_EOL);
}

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\HttpClient\HttpClient;
use Symfony\Component\Yaml\Yaml;


const GITHUB_CONTRIBUTORS_POINT = 'https://api.github.com/repos/{repository}/contributors';
const GITHUB_USERS_POINT = 'https://api.github.com/users/{login}';
const REGEX = '/=([[:digit:]]+)>; rel="last"/';

/**
 * @author Mickaël Andrieu <andrieu.travail@gmail.com>
 * 
 * A simple CLI tool to generate information about GitHub contributors of a repository.
 */
(new Application('traces', '1.0.0'))
  ->register('traces')
      ->setDescription('A simple CLI tool to generate information about GitHub contributors of a repository.')
      ->addArgument('repository', InputArgument::REQUIRED, 'GitHub repository, for instance PrestaShop/PrestaShop')
      ->addArgument('user', InputArgument::REQUIRED, 'GitHub username, for instance `johndoe`')
      ->addArgument('password', InputArgument::REQUIRED, 'GitHub password, for instance `secr3tSt0rY`')
      ->addOption('config', null, InputOption::VALUE_REQUIRED, 'Configuration file, for exclusions')
      ->setCode(function(InputInterface $input, OutputInterface $output) {
          $io = new SymfonyStyle($input, $output);

          $repository = $input->getArgument('repository');
          $user = $input->getArgument('user');
          $password = $input->getArgument('password');

          $config = $input->getOption('config');

          $authHeaders = ['auth_basic' => [$user, $password]];
          $requestUri = str_replace('{repository}', $repository, GITHUB_CONTRIBUTORS_POINT);

          $client = HttpClient::create();
          $response = $client->request('GET', $requestUri, ['timeout' => 2.0]);

            $headers = $response->getHeaders();
          if ('application/json; charset=utf-8' === $headers['content-type'][0]) {
              if(array_key_exists('link', $headers)){
                  $headerValue = $headers['link'][0];
                  preg_match(REGEX, $headerValue, $matches);
                  $nbPages = $matches[1];
                  $allContributors = [];

                  for ($i = 1; $i <= $nbPages; $i++) {
                      $response = $client->request('GET', $requestUri . '?page=' . $i, $authHeaders);
                      $contributors = json_decode($response->getContent(), true);
                      $allContributors = array_merge($allContributors, $contributors);
                  }

                  $users = [];
                  $excludes = $config ? Yaml::parse(file_get_contents($config))['config']['exclusions'] : [];

                  foreach($allContributors as $contributor) {
                      if (in_array($contributor['login'], $excludes)) {
                          continue;
                      }
                      $requestUri = str_replace('{login}', $contributor['login'], GITHUB_USERS_POINT);
                      $response = $client->request('GET', $requestUri, ['headers' => $authHeaders]);

                      $user = json_decode($response->getContent(), true);
                      $user['contributions'] = $contributor['contributions'];

                      $users[] = $user;
                  }

                  $fs = new Filesystem();
                  $fs->dumpFile('contributors.js', json_encode($users, JSON_PRETTY_PRINT));
              }
          }

          $io->success(sprintf('%s contributors found for the repository "%s".', count($users), $repository));
      })
  ->getApplication()
  ->setDefaultCommand('traces', true)
->run();