<?php
/**
 * @file
 * Easy social module.
 */

/**
 * Easy Social widget types.
 */
define('EASY_SOCIAL_WIDGET_HORIZONTAL', 0);
define('EASY_SOCIAL_WIDGET_VERTICAL', 1);

/**
 * Easy Social max number of blocks.
 */
define('EASY_SOCIAL_BLOCK_MAX', 10);

module_load_include('inc', 'easy_social', 'includes/easy_social.widgets');

/**
 * Implements hook_permission().
 */
function easy_social_permission() {
  return array(
    'administer easy social' => array(
      'title' => t('Administer Easy Social'),
      'description' => t('Configure Easy Social module'),
    ),
    'use easy social wizard' => array(
      'title' => t('Use Easy Social Wizard'),
      'description' => t('Access the Easy Social Wizard'),
    ),
  );
}

/**
 * Implements hook_views_api().
 */
function easy_social_views_api() {
  return array(
    'api' => 3,
  );
}

/**
 * Implements hook_menu().
 */
function easy_social_menu() {
  $items = array();

  $items['admin/config/content/easy_social'] = array(
    'title' => 'Easy Social Settings',
    'description' => 'Configure the social buttons and node types',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_main'),
    'access arguments' => array('administer easy social'),
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social_wizard'] = array(
    'title' => 'Easy Social Wizard',
    'description' => 'Quickly enable Easy Social for your Content Types',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_wizard'),
    'access arguments' => array('use easy social wizard'),
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social/default'] = array(
    'title' => 'Settings',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social/order'] = array(
    'title' => 'Widget Order',
    'description' => 'Easy Social Widget Order',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_order'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
    'weight' => 1,
  );

  $items['admin/config/content/easy_social/ignore-paths'] = array(
    'title' => 'Ignore Paths',
    'description' => 'Global paths to ignore and do not display Easy Social',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_ignore_paths'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
    'weight' => 2,
  );

  $items['admin/config/content/easy_social/widget-extra'] = array(
    'title' => 'Extra Widgets',
    'description' => 'Extra settings for widgets',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_extra'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
    'weight' => 3,
  );

  $items['admin/config/content/easy_social/summary'] = array(
    'title' => 'Summary',
    'description' => 'Easy Social Summary',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_summary'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
    'weight' => 4,
  );

  $items['admin/config/content/easy_social/widget-extra/default'] = array(
    'title' => 'Extra Widget Settings',
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );

  $items['admin/config/content/easy_social/widget-extra/twitter'] = array(
    'title' => 'Twitter',
    'description' => 'Extra settings for Twitter',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_extra_twitter'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social/widget-extra/facebook'] = array(
    'title' => 'Facebook',
    'description' => 'Extra settings for Facebook',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_extra_facebook'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social/widget-extra/googleplus'] = array(
    'title' => 'Google+',
    'description' => 'Extra settings for Google+',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_extra_googleplus'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
  );

  $items['admin/config/content/easy_social/widget-extra/linkedin'] = array(
    'title' => 'LinkedIn',
    'description' => 'Extra settings for LinkedIn',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('easy_social_admin_config_extra_linkedin'),
    'access arguments' => array('administer easy social'),
    'type' => MENU_LOCAL_TASK,
    'file' => 'includes/easy_social.admin.inc',
  );

  return $items;
}

/**
 * Implements hook_variable_info().
 */
function easy_social_variable_info() {
  $variables = array();

  // Global settings.
  $variables['easy_social_ignore_paths'] = array(
    'title' => t('Easy Social Global Ignore Paths'),
    'default' => '',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_global_type'] = array(
    'title' => t('Easy Social Global Widget Type'),
    'default' => 1,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_global_widgets'] = array(
    'title' => t('Easy Social Global Widgets'),
    'default' => array('twitter' => 'twitter', 'facebook' => 'facebook', 'googleplus' => 'googleplus', 'linkedin' => 'linkedin'),
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_global_order'] = array(
    'title' => t('Easy Social Widget Order'),
    'default' => array('twitter', 'facebook', 'googleplus', 'linkedin'),
    'group' => 'easy_social',
    'token' => FALSE,
  );

  // Custom settings per content type.
  $node_types = node_type_get_types();

  foreach ($node_types as $type => $typeobj) {
    $variables["easy_social_{$type}_enable"] = array(
      'title' => t('Enable Easy Social for nodes of type %type', array('%type' => $typeobj->name)),
      'default' => FALSE,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_comment_{$type}_enable"] = array(
      'title' => t('Enable Easy Social on comments for nodes of type %type', array('%type' => $typeobj->name)),
      'default' => FALSE,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_{$type}_count"] = array(
      'title' => t('Number of Easy Social fields for nodes of type %type', array('%type' => $typeobj->name)),
      'default' => 1,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_{$type}_type"] = array(
      'title' => t('Easy Social Widget type for nodes of %type', array('%type' => $typeobj->name)),
      'default' => 1,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_{$type}_widgets"] = array(
      'title' => t('Easy Social Widgets for nodes of %type', array('%type' => $typeobj->name)),
      'default' => FALSE,
      'group' => 'easy_social',
      'token' => FALSE,
    );
  }

  // Custom settings for blocks.
  $variables['easy_social_block_count'] = array(
    'title' => t('Number of Easy Social blocks'),
    'default' => 1,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  // This is done like this because calling variable_get_value() inside here = WSOD.
  for ($i = 1; $i <= EASY_SOCIAL_BLOCK_MAX; ++$i) {
    $variables["easy_social_block_{$i}_title"] = array(
      'title' => t('Block title'),
      'default' => '',
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_block_{$i}_override"] = array(
      'title' => t('Override settings for this block'),
      'default' => FALSE,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_block_{$i}_type"] = array(
      'title' => t('Widget Type'),
      'default' => 1,
      'group' => 'easy_social',
      'token' => FALSE,
    );

    $variables["easy_social_block_{$i}_widgets"] = array(
      'title' => t('Enabled Widgets'),
      'default' => array(),
      'group' => 'easy_social',
      'token' => FALSE,
    );
  }

  // Custom settings for Twitter.
  $variables['easy_social_twitter_account_via'] = array(
    'title' => t('Easy Social Global Mention Account'),
    'default' => '',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_twitter_account_related'] = array(
    'title' => t('Easy Social Global Related Account'),
    'default' => '',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_twitter_account_description'] = array(
    'title' => t('Easy Social Global Twitter Description'),
    'default' => 'Check it out!',
    'group' => 'easy_social',
    'token' => FALSE,
  );
  $variables['easy_social_twitter_count_show'] = array(
    'title' => t('Easy Social Global Twitter Show Count option'),
    'default' => 1,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  // Custom settings for Facebook.
  $variables['easy_social_facebook_appid'] = array(
    'title' => t('Facebook Application ID'),
    'default' => '',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_widget_type'] = array(
    'title' => t('Facebook widget type'),
    'default' => 'iframe',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_send_button'] = array(
    'title' => t('Send Button (XFBML Only)'),
    'default' => FALSE,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_width_vertical'] = array(
    'title' => t('Show faces'),
    'default' => '48',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_width_horizontal'] = array(
    'title' => t('Show faces'),
    'default' => '88',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_show_faces'] = array(
    'title' => t('Show faces'),
    'default' => TRUE,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_verb'] = array(
    'title' => t('Verb to display'),
    'default' => 'like',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_color_scheme'] = array(
    'title' => t('Color Scheme'),
    'default' => 'light',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_facebook_font'] = array(
    'title' => t('Font'),
    'default' => 'default',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  // Custom settings for Google+.
  $variables['easy_social_googleplus_annotation'] = array(
    'title' => t('Annotation'),
    'default' => 'bubble',
    'group' => 'easy_social',
    'token' => FALSE,
  );

  $variables['easy_social_googleplus_html5'] = array(
    'title' => t('HTML5 valid syntax'),
    'default' => TRUE,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  // Custom settings for LinkedIn.
  $variables['easy_social_linkedin_count_show'] = array(
    'title' => t('Easy Social Global LinkedIn Show Count option'),
    'default' => 1,
    'group' => 'easy_social',
    'token' => FALSE,
  );

  return $variables;
}

/**
 * Implements hook_theme().
 */
function easy_social_theme() {
  return array(
    'easy_social_links' => array(
      'template' => 'templates/easy_social-links',
      'variables' => array('widgets' => array(), 'widget_type' => NULL, 'lang' => NULL),
    ),
    'easy_social_admin_order' => array(
      'render element' => 'form',
    ),
  );
}

/**
 * Implements hook_field_extra_fields().
 *
 * Makes Easy Social available in Manage Display page for content types and comments.
 */
function easy_social_field_extra_fields() {
  $extra = array();
  $node_types = node_type_get_types();

  // Fields for node types.
  foreach ($node_types as $type => $typeobj) {
    if (variable_get_value("easy_social_{$type}_enable")) {
      // Fields for nodes.
      for ($i = 1, $num = variable_get_value("easy_social_{$type}_count"); $i <= $num; ++$i) {
        if (isset($extra['node'][$type]['display'])) {
          $extra['node'][$type]['display']["easy_social_{$i}"] = array(
            'label' => t('Easy Social !num', array('!num' => $i)),
            'weight' => 100 + $i,
          );
        }
        else {
          $extra['node'][$type] = array(
            'display' => array(
              "easy_social_{$i}" => array(
                'label' => t('Easy Social !num', array('!num' => $i)),
                'weight' => 100 + $i,
              ),
            ),
          );
        }
      }

      // Field display for comments.
      if (module_exists('comment') && variable_get_value("easy_social_{$type}_enable")) {
        if (variable_get_value("easy_social_comment_{$type}_enable")) {
          $extra['comment']['comment_node_' . $type] = array(
            'display' => array(
              'easy_social' => array(
                'label' => t('Easy Social'),
                'weight' => 100,
              ),
            ),
          );
        }
      }
    }
  }

  return $extra;
}

/**
 * Implements hook_comment_view().
 */
function easy_social_comment_view($comment, $view_mode, $langcode) {
  // Current node type for this comment.
  $node_type = str_replace('comment_node_', '', $comment->node_type);

  // Check if Easy Social is available for comments of this type.
  if (module_exists('comment') && variable_get_value("easy_social_{$node_type}_enable")) {
    if (variable_get_value("easy_social_comment_{$node_type}_enable")) {
      // Generate permalink for comment.
      $uri = entity_uri('comment', $comment);
      $uri['options'] += array('absolute' => TRUE);
      $permalink = url($uri['path'], $uri['options']);
      $node = node_load($comment->nid);

      // Load Easy Social stuff.
      $type = variable_get_value("easy_social_{$node_type}_type");
      $enabled_widgets = variable_get_value("easy_social_{$node_type}_widgets");
      $widgets = _easy_social_render_widgets($permalink, $comment->subject, $type, $enabled_widgets, $node->language);

      // Add Easy Social widgets.
      $comment->content["easy_social"] = array(
        '#theme' => 'easy_social_links',
        '#widgets' => $widgets,
        '#widget_type' => $type,
        '#lang' => $node->language,
        '#weight' => 100,
      );
    }
  }
}

/**
 * Implements hook_node_view().
 */
function easy_social_node_view($node, $view_mode, $langcode) {
  // We use this instead of $node->path to get an absolute URL.
  $url = url('node/' . $node->nid, array('absolute' => TRUE));

  // Check if Easy Social is enabled for this content type.
  if (variable_get_value("easy_social_{$node->type}_enable")) {
    $type = variable_get_value("easy_social_{$node->type}_type");
    $enabled_widgets = variable_get_value("easy_social_{$node->type}_widgets");
    $widgets = _easy_social_render_widgets($url, $node->title, $type, $enabled_widgets, $node->language);
    $count = variable_get_value("easy_social_{$node->type}_count");

    // Add as many extra fields as we've defined.
    for ($i = 1; $i <= $count; ++$i) {
      $node->content["easy_social_{$i}"] = array(
        '#theme' => 'easy_social_links',
        '#widgets' => $widgets,
        '#widget_type' => $type,
        '#lang' => $node->language,
        '#weight' => 100 + $i,
      );
    }
  }
}

/**
 * Returns a list of enabled Easy Social widgets.
 *
 * @return array
 */
function easy_social_get_widgets() {
  static $static;

  // First check static cache.
  if (!isset($static)) {
    // Then check Drupal's cache.
    $cache = cache_get('easy_social_widgets');

    if (isset($cache->data) && is_array($cache->data)) {
      $return = $cache->data;
    }
    else {
      $return = array();

      foreach (module_implements('easy_social_widget') as $name) {
        $widgets = module_invoke($name, 'easy_social_widget');
        $return = array_merge($return, $widgets);
      }

      // Add widgets to easy_social_global_order variable.
      $order = variable_get_value('easy_social_global_order');

      $modified = FALSE;

      foreach ($return as $name => $array) {
        if (!in_array($name, $order, TRUE)) {
          $order[] = $name;
          $modified = TRUE;
        }
      }

      if ($modified) {
        variable_set('easy_social_global_order', $order);
        cache_set('easy_social_widgets', $return, 'cache', CACHE_TEMPORARY);
      }
    }
    $static = $return;
  }

  return $static;
}

/**
 * Implements hook_easy_social_widget().
 */
function easy_social_easy_social_widget() {
  return array(
    'facebook' => array(
      'name' => 'Facebook',
      'markup' => '_easy_social_widget_facebook_markup',
    ),
    'googleplus' => array(
      'name' => 'Google+',
      'markup' => '_easy_social_widget_googleplus_markup',
      'scripts' => array(
        array(
          'path' => '//apis.google.com/js/plusone.js',
          'type' => 'external',
        ),
      ),
    ),
    'linkedin' => array(
      'name' => 'LinkedIn',
      'markup' => '_easy_social_widget_linkedin_markup',
      'scripts' => array(
        array(
          'path' => '//platform.linkedin.com/in.js',
          'type' => 'external',
        ),
      ),
    ),
    'twitter' => array(
      'name' => 'Twitter',
      'markup' => '_easy_social_widget_twitter_markup',
      'scripts' => array(
        array(
          'path' => '//platform.twitter.com/widgets.js',
          'type' => 'external',
        ),
      ),
    ),
  );
}

/**
 * Implements hook_block_info().
 */
function easy_social_block_info() {
  $return = array();
  $num_blocks = variable_get_value('easy_social_block_count');

  for ($i = 1; $i <= $num_blocks; ++$i) {
    $return["easy_social_block_{$i}"] = array(
      'info' => t('Easy Social Block !num', array('!num' => $i)),
      'cache' => DRUPAL_CACHE_PER_PAGE,
    );
  }

  return $return;
}

/**
 * Implements hook_block_view().
 */
function easy_social_block_view($delta = '') {
  $num_blocks = variable_get_value('easy_social_block_count');

  // Use current page' url and title.
  $path = isset($_GET['q']) ? $_GET['q'] : '<front>';

  $url = url($path, array(
    'absolute' => TRUE,
    'query' => drupal_get_query_parameters()
  ));

  $title = variable_get('site_name');

  for ($i = 1; $i <= $num_blocks; ++$i) {
    if ($delta === "easy_social_block_{$i}") {
      // check if this block has overriden settings
      if (variable_get_value("easy_social_block_{$i}_override")) {
        $type = variable_get_value("easy_social_block_{$i}_type");
        $enabled_widgets = variable_get_value("easy_social_block_{$i}_widgets");

        if (variable_get_value("easy_social_block_{$i}_share_title")) {
          $title_string = variable_get_value("easy_social_block_{$i}_share_title");
          $node = menu_get_object();

          if (is_object($node) && is_numeric($node->nid)) {
            $title = token_replace($title_string, array('node' => $node));
          }
        }

        //Overwritten urls
        $url = array();
        foreach ($enabled_widgets as $en_widgets) {
          if((bool)$en_widgets !== FALSE){
            $url[$en_widgets] = variable_get("easy_social_block_{$i}_url_{$en_widgets}", "[current-path]");
            //Empty URL or current path
            if(empty($url[$en_widgets]) || trim($url[$en_widgets]) == '[current-path]') {
              $url[$en_widgets] = url($path, array('absolute' => TRUE));
            } else
            //Base URL
            if(trim($url[$en_widgets]) == '[base-url]') {
              $url[$en_widgets] = url('<front>', array('absolute' => TRUE));
            } else
            //Internal path
            if(!valid_url($url[$en_widgets], TRUE)) {
              $url[$en_widgets] = url($url[$en_widgets], array('absolute' => TRUE));
            }
          } 
        }
      }
      else {
        $type = $enabled_widgets = NULL;
      }

      global $language;
      $widgets = _easy_social_render_widgets($url, $title, $type, $enabled_widgets, $language->language);

      return array(
        'subject' => variable_get_value("easy_social_block_{$i}_title"),
        'content' => array(
          '#theme' => 'easy_social_links',
          '#widgets' => $widgets,
          '#widget_type' => $type,
          '#lang' => $language->language,
        ),
      );
    }
  }
}

/**
 * Returns whether Easy Social should be ignored in the current page.
 *
 * @return boolean
 */
function _easy_social_page_ignore() {
  $urls_ignored = variable_get_value('easy_social_ignore_paths');
  $page_match = FALSE;
  $path = drupal_get_path_alias($_GET['q']);

  // Compare with the internal and path alias (if any).
  $page_match = drupal_match_path($path, $urls_ignored);

  if ($path != $_GET['q']) {
    $page_match = $page_match || drupal_match_path($_GET['q'], $urls_ignored);
  }

  return $page_match;
}

/**
 * Return an array of rendered Easy Social Widgets
 *
 * @param string $url
 * @param string $title
 * @param int $type
 * @param string $enabled_widgets
 * @param string $node->language
 * @return array
 */
function _easy_social_render_widgets($url, $title, $type = NULL, $enabled_widgets = NULL, $lang = 'en') {
  drupal_add_css(drupal_get_path('module', 'easy_social') . '/css/easy_social.css');

  if (!_easy_social_page_ignore()) {
    // If settings aren't passed, fallback to defaults.
    if (!isset($type)) {
      $type = variable_get_value('easy_social_global_type');
    }

    if (!$enabled_widgets) {
      $enabled_widgets = variable_get_value('easy_social_global_widgets');
    }

    // Load enabled widgets.
    $widgets = easy_social_get_widgets();

    // Sort widgets.
    $order = variable_get_value('easy_social_global_order');
    $ordered_widgets = array();

    foreach ($order as $value) {
      if (in_array($value, $enabled_widgets, TRUE)) {
        $ordered_widgets[] = $value;
      }
    }

    $widget_links = array();

    // Process enabled widgets.
    foreach ($ordered_widgets as $service) {
      // Add javascript includes, if any.
      if (isset($widgets[$service]['scripts']) && is_array($widgets[$service]['scripts'])) {
        foreach ($widgets[$service]['scripts'] as $script) {
          $script_type = (isset($script['type'])) ? $script['type'] : 'external';
          if ($script_type !== 'module') {
            drupal_add_js($script['path'], $script_type);
          }
          else {
            drupal_add_js($script['path']);
          }
        }
      }

      // Add css includes, if any.
      if (isset($widgets[$service]['styles']) && is_array($widgets[$service]['styles'])) {
        foreach ($widgets[$service]['styles'] as $style) {
          $style_type = (isset($style['type'])) ? $style['type'] : 'external';
          if ($style_type !== 'module') {
            drupal_add_css($style['path'], $style_type);
          }
          else {
            drupal_add_css($style['path']);
          }
        }
      }

      // Finally, add widget markup.
      if (isset($widgets[$service]['markup'])) {
        $widget_url = (is_array($url)) ? $url[$service] : $url;
        $widget_links[$service] = call_user_func($widgets[$service]['markup'], $widget_url, $type, $title, $lang);
      }
    }

    return $widget_links;
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adds Easy Social options to node type forms.
 */
function easy_social_form_node_type_form_alter(&$form, $form_state) {
  $type = $form['#node_type']->type;
  if (!empty($type)) {
    $options = _easy_social_get_options();
    $form['#submit'][] = 'easy_social_node_type_form_submit';

    $form['easy_social'] = array(
      '#type' => 'fieldset',
      '#title' => t('Easy Social settings'),
      '#group' => 'additional_settings',
      '#tree' => TRUE,
      '#attached' => array(
        'js' => array(drupal_get_path('module', 'easy_social') . '/js/easy_social_settings_form.js'),
      ),
      '#attributes' => array('class' => array('easysocial-settings-form')),
    );

    $form['easy_social']["easy_social_{$type}_enable"] = array(
      '#type' => 'checkbox',
      '#title' => t('Enable Easy Social'),
      '#description' => t('Check this option to enable easy social for this content type'),
      '#default_value' => variable_get_value("easy_social_{$type}_enable"),
      '#attributes' => array('class' => array('easy-social-current-type')),
    );

    if (module_exists('comment') && variable_get_value("easy_social_{$type}_enable")) {
      $form['easy_social']["easy_social_comment_{$type}_enable"] = array(
        '#type' => 'checkbox',
        '#title' => t('Enable Easy Social on comments'),
        '#description' => t('Check this option to enable easy social for this content type\'s comments'),
        '#default_value' => variable_get_value("easy_social_comment_{$type}_enable"),
        '#attributes' => array('class' => array('easy-social-comment-type')),
      );
    }

    $form['easy_social']["easy_social_{$type}_count"] = array(
      '#type' => 'select',
      '#title' => t('Number of Easy Social fields'),
      '#description' => t('You can add more than one Easy Social field to your nodes. This is useful, for example, to add the widget both at top and at the bottom of a node.'),
      '#options' => array('1' => 1, '2' => 2),
      '#default_value' => variable_get_value("easy_social_{$type}_count"),
      '#attributes' => array('class' => array('easy-social-number-fields-type')),
    );

    $form['easy_social']["easy_social_{$type}_type"] = array(
      '#type' => 'radios',
      '#title' => t('Type of buttons'),
      '#options' => array(
        EASY_SOCIAL_WIDGET_HORIZONTAL => t('Horizontal'),
        EASY_SOCIAL_WIDGET_VERTICAL => t('Vertical')
      ),
      '#default_value' => _easy_social_variable_get_value("easy_social_{$type}_type"),
      '#attributes' => array('class' => array('easy-social-type-buttons')),
    );

    $form['easy_social']["easy_social_{$type}_widgets"] = array(
      '#type' => 'checkboxes',
      '#title' => t('Social Widgets'),
      '#options' => $options,
      '#default_value' => _easy_social_variable_get_value("easy_social_{$type}_widgets"),
      '#attributes' => array('class' => array('easy-social-each-widget')),
    );
  }
}

/**
 * Submit callback.
 *
 * We have to clear caches to make the Easy Social display widgets
 * appear/disappear from the Manage Display form.
 *
 * @see easy_social_form_node_type_form_alter()
 * @see _field_info_collate_fields()
 */
function easy_social_node_type_form_submit(&$form, &$form_state) {
  if (strpos($form_state['values']['op'], 'Delete') === 0 || $form_state['triggering_element']['#parents'][0] === 'delete') {
    // Deleting content type, therefore delete all Easy Social variables related to it.
    foreach ($form_state['values']['easy_social'] as $name => $value) {
      variable_del($name);
    }
  }
  else {
    foreach ($form_state['values']['easy_social'] as $name => $value) {
      variable_set($name, $value);
    }

    // Delete bogus variable that is automatically created.
    // Ideally we wouldn't allow it to get created but can't seem to work around this.
    variable_del('easy_social_' . $form_state['values']['type']);

    // Don't flush caches when creating a new content type.
    if (!empty($form_state['values']['old_type'])) {
      // Clear field info cache.
      // @see _field_info_collate_fields()
      cache_clear_all('field_info_fields', 'cache_field');
    }
  }
}

/**
 * Returns Easy Social options for use in settings forms.
 *
 * @return array
 */
function _easy_social_get_options() {
  static $options;

  if (!isset($options)) {
    $widgets = easy_social_get_widgets();
    $order = variable_get_value('easy_social_global_order');
    $ordered_widgets = array();

    foreach ($order as $key) {
      $ordered_widgets[$key] = $widgets[$key];
    }

    $options = array();

    foreach ($ordered_widgets as $k => $widget) {
      $options[$k] = isset($widget['name']) ? $widget['name'] : $k;
    }
  }

  return $options;
}

/**
 * Implements hook_rdf_namespaces().
 *
 * This is specific to Facebook Widget
 * Adds an XML namespace to the <html> tag of your document.
 * This is necessary for XFBML to work in earlier versions of Internet Explorer.
 *
 * Ideally this should only be done when using the Facebook widget and
 * (optimally) when using IE. However, this is harmless and it would be kind
 * of inefficient to check for these before adding the variable every time.
 */
function easy_social_rdf_namespaces() {
  return array(
    'fb' => 'http://ogp.me/ns/fb#',
  );
}

/**
 * Helper function to return default values, keeping global settings in mind.
 *
 * @param string $name
 * @return mixed
 */
function _easy_social_variable_get_value($name) {
  $value = variable_get($name);

  if (isset($value)) {
    return $value;
  }
  else if (strpos($name, '_type') !== FALSE) {
    return variable_get_value('easy_social_global_type');
  }
  else if (strpos($name, '_widgets') !== FALSE) {
    return variable_get_value('easy_social_global_widgets');
  }

  return variable_get_value($name);
}