<?php
/**
 * @file
 * OG Analytics module
 */

/**
 * @package OG Analytics
 * @subpackage Organic Groups
 * @author Liran Tal <liran.tal@gmail.com>
 */


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

  // Define dashboard page
  $items['node/%node/og/analytics'] = array(
    'title' => 'Analytics Dashboard',
    'page callback' => 'og_analytics_dashboard_report',
    'page arguments' => array(1),
    'access callback' => 'og_analytics_dashboard_access',
    'access arguments' => array(1),
    'type' => MENU_LOCAL_TASK,
  );

  return $items;
}

/**
 * Implements hook_perm().
 */
function og_analytics_perm() {
  return array(
    'view og analytics',
  );
}


/**
 * Implements hook_init().
 * Defining our module's js and css files.
 */
function og_analytics_init() {
  drupal_add_js(drupal_get_path('module', 'og_analytics') . '/js/og_analytics_dashboard.js');
  drupal_add_css(drupal_get_path('module', 'og_analytics') . '/css/og_analytics.css');

  drupal_set_html_head('<script type="text/javascript" src="https://www.google.com/jsapi"></script>');
}

 
/**
 * Implements hook_theme().
 */
function og_analytics_theme() {

  $content = NULL;

  return array(
    'og_analytics' => array(
      'template' => 'og_analytics',
      'arguments' => array('content' => $content, 'navigation_current' => 'Dashboard', 'node' => $node),
    ),
    'og_analytics_dashboard' => array(
      'template' => 'og_analytics_dashboard',
      'arguments' => array('content' => $content),
    ),
    'og_analytics_widget' => array(
      'template' => 'og_analytics_widget',
      'arguments' => array('content' => $content),
    ),
    'og_analytics_widget_members_count' => array(
      'template' => 'og_analytics_widget_members_count',
      'arguments' => array('content' => $content),
    ),
    'og_analytics_widget_posts_count' => array(
      'template' => 'og_analytics_widget_posts_count',
      'arguments' => array('content' => $content),
    ),
  );


}


/**
 * Access check for dashboard menu item.
 * 
 * @param object $node
 *   the node object.
 * @return bool
 */
function og_analytics_dashboard_access($node) {
  
  // Make sure this group is actually a group
  if (!isset($node->type) || !og_is_group_type($node->type)) {
    return FALSE;
  }

  if (user_access('view og analytics'))
    return TRUE;

}


/**
 * Implements hook_form().
 * 
 * @param array $form_state
 *   
 * @param array $node
 *   The group object.
 * 
 * @param string $navigation_current
 *   The current page (it's string name) that is being viewed.
 * 
 */
function og_analytics_navigation_form(&$form_state, $node, $navigation_current) {

  global $base_url;

  // Call all modules to get their links to be put on the navigation select box.
  $modules_nav_links = module_invoke_all('og_analytics_navigation_links', $node);

  $own_nav_links = array(
    $base_url . '/node/' . $node->nid . '/og/analytics/dashboard' => 'Dashboard',
  );

  if (!$modules_nav_links || !is_array($modules_nav_links))
    $modules_nav_links = array();
  
  $navigation_links = array_unique(array_merge($modules_nav_links, $own_nav_links));
  asort($navigation_links, SORT_STRING);

  // Setting the default option for the select box.
  // This is used to set in the select box the current report page that is viewed.
  $default = array_search($navigation_current, $navigation_links);


  // Container div for the whole form.
  $form['og_analytics_navigation']['navigation'] = array(
    '#type' => 'fieldset',
    '#attributes' => array('class' => 'og_analytics'),
    '#collapsed' => FALSE,
    '#collapsible' => TRUE,
  );

  $form['og_analytics_navigation']['navigation']['report'] = array(
    '#type' => 'select',
    '#title' => t('Navigate to Report'),
    '#options' => $navigation_links,
    '#default_value' => $default,
    '#attributes' => array('id' => 'og_analytics_navigation'),
  );

  $form['#attributes'] = array(
    //'class' => 'og_analytics_form',
    'id' => 'og_analytics_navigation'
  );


  return $form;
}


function og_analytics_dashboard_report($node) {

  drupal_set_title('');

  $output = '';

  if (!isset($node->nid) && !og_is_group_type($node->type)) {
    if ($group_node = og_get_group_context()) {
      $node = $group_node;
    }
  }

  if (!$node)
    drupal_access_denied();

  $content = '';

  module_load_include('inc', 'og_analytics', 'inc/og_analytics_dashboard.model');

  $members_count = og_analytics_group_members_count($node->nid);
  $content['widgets']['group_members_count']['html'] = theme('og_analytics_widget_members_count', $members_count);

  $posts_types = node_get_types('names');

  unset($posts_types['other_content_directory']);
  unset($posts_types['other_content_file']);
  unset($posts_types['content_directory']);
  unset($posts_types['content_file']);

  $posts_count = og_analytics_group_posts_count($node->nid, TRUE, array_keys($posts_types));
  $content['widgets']['group_activity']['html'] = theme('og_analytics_widget_posts_count', $posts_count);

  // it's possible to theme a generic widget with data and text description as follows:
  //$content['widgets']['group_members_count']['data'] = $og_statistics['members_count'];
  //$content['widgets']['group_members_count']['description'] = t('total members in community');


  $output = theme('og_analytics_dashboard', $content);

  return theme('og_analytics', $output, 'Dashboard', $node);
}


/**
 * OG Analytics Return JSON.
 * helper function to return a json encoded string and exit immediately.
 */
function og_analytics_return_json($data) {
  echo json_encode($data);
  exit;
}