<?php
// $Id: $

/**
 *
 *  @file
 *  Installation file.
 *
 */


/**
 *  Implementation of hook_requirements().
 */
function topspin_requirements($phase) {
  $requirements = array();
  
  // Ensure translations don't break at install time.
  $t = get_t();

  // Test PHP version.
  $php = '5.2.0';
  if (version_compare(phpversion(), $php) < 0) {
    $requirements['topspin_php']['title'] = $t('PHP');
    $requirements['topspin_php']['description'] = $t('Your PHP installation is too old. The Topspin module requires at least PHP %version.', array('%version' => $php));
    $requirements['topspin_php']['severity'] = REQUIREMENT_ERROR;
  }
  
  // Make sure cURL is installed.
  if (!function_exists('curl_init')) {
    $requirements['curl']['title'] = $t('cURL');
    $requirements['curl']['description'] = $t('The !cURL library is required in order to communicate with the Topspin API.', array('!cURL' => l('cURL', 'http://php.net/manual/en/book.curl.php')));
    $requirements['curl']['severity'] = REQUIREMENT_ERROR;
  }
  
  // Make sure jSON is installed.
  if (!function_exists('json_encode')) {
    $requirements['json']['title'] = $t('jSON');
    $requirements['json']['description'] = $t('The !jSON library is required in order to communicate with the Topspin API.', array('!jSON' => l('jSON', 'http://php.net/manual/en/book.json.php')));
    $requirements['json']['severity'] = REQUIREMENT_ERROR;
  }

  return $requirements;
}