Simplenews Drupal 7 Module

Simplenews Change Un-subscribe URL to Shorten bitly URL

/**
 * Implements hook_tokens_alter() 
 */
function my_module_tokens_alter(&$replacements, $context) {
  if (isset($context['type']) && $context['type'] == 'simplenews-subscriber') {
    if (isset($replacements['[simplenews-subscriber:subscribe-url]'])) {
      $subscribe_url = $replacements['[simplenews-subscriber:subscribe-url]'];
      $subscription_short = my_module_get_bitly_url($subscribe_url);
      if (valid_url($subscription_short)) {
        $replacements['[simplenews-subscriber:subscribe-url]'] = $subscription_short;
      }
    }
    if (isset($replacements['[simplenews-subscriber:unsubscribe-url]'])) {
      $unsubscribe_url = $replacements['[simplenews-subscriber:unsubscribe-url]'];
      $unsubscription_short = my_module_get_bitly_url($unsubscribe_url);
      if (valid_url($unsubscription_short)) {
        $replacements['[simplenews-subscriber:unsubscribe-url]'] = $unsubscription_short;
      }
    }
  }
}

/**
 * Helper function to convert site URL to shorten bitly URL
 */
function my_module_get_bitly_url($url) {
  $login = MD_SIMPLENEWS_BITLY_USER;
  $appkey = MD_SIMPLENEWS_BITLY_APIKEY;
  $format = 'json';
  $version = '2.0.1';  
  $bitly = 'http://api.bit.ly/shorten?version=' . $version . '&longUrl=' . urlencode($url) . '&login='. $login . '&apiKey=' . $appkey . '&format=' . $format;    
  $response = file_get_contents($bitly);  
  if (strtolower($format) == 'json') {
    $json = @json_decode($response,true);
    return $json['results'][$url]['shortUrl'];
  }  
  else  {
    $xml = simplexml_load_string($response);
    return 'http://bit.ly/'.$xml->results->nodeKeyVal->hash;
  }
}

Just To Alter the Token Values :

function singpost_common_tokens_alter(&$replacements, $context) {
  if (isset($context['type']) && $context['type'] == 'simplenews-subscriber') {
    if (isset($replacements['[simplenews-subscriber:unsubscribe-url]'])) {
      $str_host = ($_SERVER['HTTP_HOST']=='default')?gethostname():$_SERVER['HTTP_HOST'];  
      $unsubscribe_url = $replacements['[simplenews-subscriber:unsubscribe-url]'];
      $unsubscribe_url = str_replace("http://default/", 'http://'.$str_host.'/', $unsubscribe_url);
      if (isset($unsubscribe_url) && $unsubscribe_url!='') {
        $replacements['[simplenews-subscriber:unsubscribe-url]'] = $unsubscribe_url;
      }
    }
  }
}