index.php

<?php

date_default_timezone_set('Europe/London'); // stop php from whining

$format = 'html';
$theme = 'default';
$cname = '';

// use a match instead of preg_replace to ensure we got the cname
preg_match('/^([a-z0-9\-]+)\.mit-license\..*$/', $_SERVER['HTTP_HOST'], $match);

if (count($match) == 2) {
  $cname = $match[1];
}

$user_file = 'users/' . $cname . '.json';

if ($_SERVER['REQUEST_METHOD'] === 'POST' && $cname) {
  try {
    $data = json_decode(file_get_contents('php://input'));
    if (!property_exists($data, 'copyright')) {
      Throw new Exception('>>> JSON requires "copyright" property and value');
    }

    if (file_exists($user_file)) {
      Throw new Exception(wordwrap('>>> User already exists - to update values, please send a pull request on https://github.com/remy/mit-license'));
    }

    if (!file_put_contents($user_file, json_encode($data))) {
      Throw new Exception(wordwrap('>>> Unable to create new user - please send a pull request on https://github.com/remy/mit-license'));
    }

    echo '>>> MIT license page created: http://' . $_SERVER['HTTP_HOST'] . "\n\n";

    // try to add to github...!
    // exec('/usr/local/bin/git add ' . $user_file . ' && /usr/local/bin/git commit -m"created ' . $user_file . '" && /usr/local/bin/git push', $out, $r);
    // user_error('create new user. out: ' . $out . ', r: ' . $r);
  } catch (Exception $e) {
    echo $e->getMessage() . "\n\n";
  }
  exit;
}

/**
 * Load up the user.json file and read properties in
 **/
if ($cname && file_exists($user_file)) {
  $user = json_decode(file_get_contents($user_file));
  $holder = htmlentities($user->copyright, ENT_COMPAT | ENT_HTML401, 'UTF-8');
  if (property_exists($user, 'url')) {
    $holder = '<a href="' . $user->url . '">' . $holder . '</a>';
  }

  if (property_exists($user, 'email')) {
    $holder = $holder . ' &lt;<a href="mailto:' . $user->email . '">' . $user->email . '</a>&gt;';
  }

  if (property_exists($user, 'format')) {
    if (strtolower($user->format) == 'txt') {
      $format = 'txt';
    }
  }

  if (property_exists($user, 'theme')) {
    if (file_exists('themes/' . $user->theme . '.css')) {
      $theme = $user->theme;
    }
  }
} else {
  $holder = "&lt;copyright holders&gt;";
}

/**
 * Now process the request url. Optional parts of the url are (in order):
 * [sha]/[year|year-range]/license.[format]
 * eg. http://rem.mit-license.org/a526bf7ad1/2009-2010/license.txt
 **/

// grab sha from request uri
$request_uri = explode('/', $_SERVER["REQUEST_URI"]);

$request = array_pop($request_uri);
// in case there's a trailing slash (unlikely)
if ($request == '') $request = array_pop($request_uri);

// url file format overrides user preference
if (stripos($request, 'license') === 0) {
  $format = array_pop(explode('.', strtolower($request))) == 'txt' ? 'txt' : 'html';

  // move down to the next part of the request
  $request = array_pop($request_uri);
}

// check if we have a year or a year range up front
$year = date('Y');
preg_match('/^(\d{4})(?:(?:\-)(\d{4}))?$/', $request, $match);
if (count($match) > 1) {
  if ($match[2]) {
    $year = $match[2];
  }
  if ($match[1]) {
    $year = $match[1] == $year ? $year : $match[1] . '-' . $year;
  }
  $request = array_pop($request_uri);
}

// check if there's a SHA on the url and read this to switch license versions
$sha = '';
if ($request != "" && $request != "/" && $request != "/index.php") {
  $sha = preg_replace('/[^a-f0-9]/', '', $request);
} else if (isset($user) && property_exists($user, 'version')) {
  $sha = preg_replace('/[^a-f0-9]/', '', $user->version);
}

// if sha specified, use that revision of licence
$license = '';
if ($sha != "") {
  $out = array();
  // preg_replace should save us - but: please help me Obi Wan...
  exec("/usr/local/bin/git show " . $sha . ":LICENSE.html", $out, $r);
  if ($r == 0) {
    $license = implode("\n", $out);
  } 
}

// if we didn't manage to read one in, use latest
if ($license == "") {
  $license = file_get_contents('LICENSE.html');
}

// replace info tag and display
$info = $year . ' ' . $holder;
$license = str_replace('{{info}}', $info, $license);
$license = str_replace('{{theme}}', $theme, $license);

// if we want text format, strip out the license from the article tag
// and then strip any other tags in the license.
if ($format == 'txt') {
  $license = array_shift(explode('</article>', array_pop(explode('<article>', $license))));
  $license = preg_replace('/<[^>]*>/', '', trim($license));
  $license = html_entity_decode($license);
  header('content-type: text/plain; charset=UTF-8');
}

echo $license;