<?php

/**
 * @file
 * Install, update and uninstall functions for the fbconnect module.
 */

/**
 * Implements hook_requirements().
 */
function fbconnect_requirements($phase) {
  $requirements = array();
  $t = get_t();

  if (!function_exists('curl_init')) {
    $requirements['curl']['title'] = $t('cURL library');
    $requirements['curl']['value'] = $t('Not installed');
    $requirements['curl']['severity'] = REQUIREMENT_ERROR;
    $requirements['curl']['description'] = $t('The cURL library is not installed. Please check the <a href="@url">PHP cURL documentation</a> for information on how to correct this.', array('@url' => 'http://www.php.net/manual/en/curl.setup.php'));
  }

  if (!function_exists('json_decode')) {
    $requirements['json']['title'] = $t('JSON extension');
    $requirements['json']['value'] = $t('Not installed');
    $requirements['json']['severity'] = REQUIREMENT_ERROR;
    $requirements['json']['description'] = $t('The JSON library is not installed. Facebook needs the JSON PHP extension');
  }

  if ($phase == 'runtime') {
    drupal_load('module', 'fbconnect');
    _facebook_client_load_include();

    $requirements['facebook-php-sdk']['title'] = $t('Facebook PHP sdk');
    if (!class_exists('Facebook')) {
      $requirements['facebook-php-sdk']['value'] = $t('Not installed');
      $requirements['facebook-php-sdk']['severity'] = REQUIREMENT_ERROR;
      $requirements['facebook-php-sdk']['description'] = $t('Fbconnect : Facebook PHP library not found. See README.txt');
    }
    elseif (!constant('Facebook::VERSION')) {
      $requirements['facebook-php-sdk']['value'] = $t('Outdated version');
      $requirements['facebook-php-sdk']['severity'] = REQUIREMENT_ERROR;
      $requirements['facebook-php-sdk']['description'] = $t('Fbconnect : Installed Facebook PHP library is outdated. See README.txt');
    }
    else {
      $requirements['facebook-php-sdk']['value'] = l(constant('Facebook::VERSION'), 'http://github.com/facebook/php-sdk', array('external' => TRUE));
      $requirements['facebook-php-sdk']['severity'] = REQUIREMENT_OK;

      //      $sdk_include_path_1 = drupal_get_path('module', 'fbconnect') .'/facebook-php-sdk/src/facebook.php';
      //      $sdk_include_path_2 = module_invoke('libraries', 'get_path', 'facebook-php-sdk') .'/src/facebook.php';
      //
      //      if (!file_exists($sdk_include_path_1) || !file_exists($sdk_include_path_2)) {
      //        $requirements['facebook-php-sdk']['severity'] = REQUIREMENT_WARNING;
      //        $requirements['facebook-php-sdk']['value'] .= ' '. $t('You installed Facebook PHP sdk in deprecated path. See README.txt');
      //      }
    }

    if (!fbconnect_get_config()) {
      $requirements['fbconnect_conf'] = array(
        'title' => $t('FBConnect'),
        'value' => $t('Not configured'),
        'severity' => REQUIREMENT_WARNING,
        'description' => $t('Please ensure that you entered Application ID and Secret Key. !link', array('!link' => l($t('Settings page'), 'admin/config/people/fbconnect'))),
      );
    }
  }

  return $requirements;
}

/**
 * @file
 * Implements hook_install().
 */
function fbconnect_install() {
  _fbconnect_change_user_mail_field();
}

/**
 * Implements hook_uninstall().
 */
function fbconnect_uninstall() {
  _fbconnect_change_user_mail_field('uninstall');
  // Delete our module's variable from the variables table.
  variable_del('fbconnect_appid');
  variable_del('fbconnect_base_domaine');
  variable_del('fbconnect_button');
  variable_del('fbconnect_button_login_text');
  variable_del('fbconnect_button_register_text');
  variable_del('fbconnect_connect_url');
  variable_del('fbconnect_debug');
  variable_del('fbconnect_exclude_patterns');
  variable_del('fbconnect_fast_reg');
  variable_del('fbconnect_fast_reg_autoname');
  variable_del('fbconnect_language_code');
  variable_del('fbconnect_loginout_mode');
  variable_del('fbconnect_namecounter');
  variable_del('fbconnect_noroot');
  variable_del('fbconnect_pic_allow');
  variable_del('fbconnect_pic_size');
  variable_del('fbconnect_pic_size_comments');
  variable_del('fbconnect_pic_size_nodes');
  variable_del('fbconnect_pic_size_profile');
  variable_del('fbconnect_reg_options');
  variable_del('fbconnect_skey');
}

/**
 * Implements hook_schema().
 */
function fbconnect_schema() {
  $schema['fbconnect_users'] = array(
    'fields' => array(
      'uid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'fbuid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'big',
      ),
      'timestamp' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('fbuid'),
  );

  return $schema;
}

/**
 * Implements hook_schema_alter().
 * @param array $schema
 * @todo remove it / create updating tool
 */
function fbconnect_schema_alter(&$schema) {
  $schema['users']['fields']['mail']['length'] = 320;
}

/**
 * Extend maximum email length to 320 chars
 */
function _fbconnect_change_user_mail_field($action = 'install') {
  $schema = array('users' => drupal_get_schema('users'));
  if ($action == 'install') {
    fbconnect_schema_alter($schema);
  }
  db_change_field('users', 'mail', 'mail', $schema['users']['fields']['mail']);
  //return $res;
}
