<?php

/**
 * @file
 * Code for the UW Virtual Site Homepage feature.
 */

include_once 'uw_virtual_site_homepage.features.inc';

/**
 * Implements hook_module_implements_alter().
 *
 * Remove the os_publications query_biblio_alter.
 */
function uw_virtual_site_homepage_module_implements_alter(&$implementations, $hook) {
  // If we are on the query_biblio_alter hook, unset os_publications and place uw_virtual_site_homepage last.
  if ($hook == "query_biblio_alter") {
    // Move uw_virtual_site_homepage's query_biblio_alter to be done last.
    $group = $implementations['uw_virtual_site_homepage'];
    unset($implementations['uw_virtual_site_homepage']);
    $implementations['uw_virtual_site_homepage'] = $group;

    // Remove os_publicatons' query_biblio_alter.
    unset($implementations['os_publications']);
  }
}

/**
 * Implements hook query_TAG_alter().
 *
 * TAG: biblio.
 * Set the searching and sorting options for the biblio query and add the space.
 */
function uw_virtual_site_homepage_query_biblio_alter(QueryAlterableInterface $query) {

  // Ensure that we have vsite turned on.
  if (!module_exists('vsite') || !$space = spaces_get_space()) {
    return;
  }

  _os_publications_filter_by_term($query);

  // This has to be separate because of scoping.
  if ($space->type == 'og') {
    $query->innerJoin('og_membership', 'ogm', 'n.nid = ogm.etid');
    $query->condition('ogm.entity_type', 'node');
    $query->condition('ogm.group_type', 'node');
    $query->condition('ogm.gid', $space->id);
  }

  $item = menu_get_item();

  // Checking for search_node alter tag.
  if (!isset($query->alterTags)) {

    // Check if we have a search_node alter tag.
    if (!isset($query->alterTags['search_node'])) {

      // Check the sort order for biblio.
      // If we're sorting by year, we want to sort by date as well to replicate D6
      // sorting.
      if (variable_get('biblio_sort', 'year') == 'year') {
        // Get their sort order.
        $biblio_year_sort = $space->controllers->variable->get('biblio_order', 'space');
        $order = &$query->getOrderBy();

        // Don't wipe the non-default sort order, this will let users still toggle asc/desc sorting by year.
        if (array_key_exists('biblio_year', $order) && $order['biblio_year'] != $biblio_year_sort) {
          $biblio_year_sort = $order['biblio_year'];
        }

        // Rebuild the array to our defaults only when the user is NOT searching.  When the user is searching, use their selections.
        if (isset($_GET['s']) && in_array($_GET['s'], array('author', 'title', 'type'))) {
          $s = current(array_keys($order));
          $o = current($order);

          if ($s = 'biblio_sort_title') {
            $biblio_sort_title = $o;
          }
        }
        else {
          $order = array();
        }

        // Sort by year, and after that create another sorting by the node's
        // "sticky" property, the creation date of the node, the Biblio date, and
        // the Biblio title.
        $order['biblio_year'] = isset($biblio_year_sort) ? $biblio_year_sort : 'DESC';
        $order['n.sticky'] = 'DESC';
        $order['n.created'] = 'DESC';
        $order['biblio_sort_title'] = (isset($biblio_sort_title)) ? $biblio_sort_title : 'ASC';
      }
      elseif (variable_get('biblio_sort', 'year') == 'type') {
        // Sort by type, and after that create another sorting by creation date of
        // the node.
        $order = &$query->getOrderBy();
        $new_order = array();

        foreach ($order as $key => $value) {
          $new_order[$key] = $value;
          if ($key == 'biblio_type_name') {
            $new_order['n.sticky'] = 'DESC';
            $new_order['biblio_year'] = 'DESC';
            $new_order['n.created'] = 'DESC';
          }
        }

        $order = $new_order;
      }
    }
  }
}

/**
 * Implements hook_field_widget_form_alter().
 *
 * Adding process to image types to change title to caption for homepage banners.
 */
function uw_virtual_site_homepage_field_widget_form_alter(&$element, &$form_state, $context) {

  if ($context['field']['type'] == 'image') {
    foreach (element_children($element) as $key => $child) {
      if ($element[$key]['#description'] == 'Provide banner images for virtual site homepages on Scholar at Waterloo sites.') {
        $element[$key]['#process'][] = 'uw_virtual_site_homepage_image_field_widget_process';
      }
    }
  }
}

/**
 * Implements hook_image_field_widget_process().
 *
 * Processing images to change title to caption for homepage banners.
 */
function uw_virtual_site_homepage_image_field_widget_process($element, &$form_state, $form) {
  // Set the title to be the caption and the description.
  $element['title']['#description'] = 'The title is display with the picture.';

  // Return the altered element.
  return $element;
}

/**
 * Implements hook_page_alter().
 *
 * Placing homepage banners on the virtual site homepage.
 */
function uw_virtual_site_homepage_page_alter(&$page) {
  global $base_path;

  // Setting the variables to be used in homepage banners.
  $index = 0;
  $continue = TRUE;

  if (isset($page['uw-virtual-site-homepage']['field_uw_faculty_list_logo'][0]['#markup'])) {
    $site_links = _uw_virtual_site_homepage_get_site_links();
    if (isset($site_links[$page['uw-virtual-site-homepage']['field_uw_faculty_list_logo'][0]['#markup']])) {
      $site_link = $site_links[$page['uw-virtual-site-homepage']['field_uw_faculty_list_logo'][0]['#markup']];
      $page['uw-virtual-site-homepage']['uw_scholar_row']['site_link'] = $site_link;
    }
  }

  // If there are banners, process them.
  if (isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index])) {

    // HTML divs in homepage banners.
    $html = '<div class="field-name-field-uw-home-page-banners">';
    $html .= '<div class="field-items">';

    $pagenumber = 0;
    $boxes = '';
    $num_of_images = 0;

    // Get the number of images in the homepage banners.
    foreach ($page['uw-virtual-site-homepage']['field_uw_homepage_banners'] as $key => $value) {
      if (is_int($key)) {
        $num_of_images++;
      }
    }

    // While there is a continue, process the homepage banners.
    while ($continue) {
      foreach ($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'] as $key => $value) {
        $fc_id = $key;
        break;
      }

      // Set theme paths, alt text and all banner sizes.
      $file = $page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['uri'];

      $banner_alt = 'Test ALT';
      $banner_small = image_style_url('uw_homepage_banners', $file);
      $banner_square = image_style_url('uw_homepage_banners_small', $file);
      $banner_med = image_style_url('uw_homepage_banners_medium', $file);
      $banner_large = image_style_url('uw_homepage_banners_large', $file);
      $banner_xl = image_style_url('uw_homepage_banners_xl', $file);

      $pagenumber++;

      // Set the image.
      if ($pagenumber == 1) {
        $html .= '<figure class="field-item uw-homepage-banners-figure element-selected">';
      }
      else {
        $html .= '<figure class="field-item uw-homepage-banners-figure element-invisible">';
      }

      if (isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_link']['#items'][0]['url'])) {
        $html .= '<a href="' . $page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_link']['#items'][0]['url'] . '">';
      }

      // Set the picture using the picture tag.
      $html .= '<picture>
                <source srcset="' . $banner_xl . '" media="(min-width: 1280px)">
                <source srcset="' . $banner_large . '" media="(min-width: 1024px)">
                <source srcset="' . $banner_med . '" media="(min-width: 769px)">
                <source srcset="' . $banner_square . '" media="(min-width: 480px)">
                <source srcset="' . $banner_small . '" media="(min-width: 320px)">
                <source srcset="' . $banner_large . '">';
      $html .= '<img src="' . $banner_xl . '" alt="' . $banner_alt . '">';
      $html .= '</picture>';

      // If there is a title, double check, and then set the caption.
      if (isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['title'])) {

        // If there is a title, set the caption.
        //  If there is not title, check that there is a title for the link and use that.
        if ($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['title'] !== "") {
          $html .= '<div class="banner-caption-wrapper">';
          $html .= '<div class="banner-caption">';
          $html .= '<h2>' . $page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['title'] . '</h2>';
          if ($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['image_field_caption']['value']) {
            $html .= '<span>' . $page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_image'][0]['#item']['image_field_caption']['value'] . '</span>';
          }
          $html .= '</div>';
          $html .= '</div>';
        }
        elseif (isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_link']['#items'][0]['title'])) {
          $html .= '<div class="banner-caption-wrapper">';
          $html .= '<div class="banner-caption">';
          $html .= '<h2>' . $page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_link']['#items'][0]['title'] . '</h2>';
          $html .= '</div>';
          $html .= '</div>';
        }
      }

      if (isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]['entity']['field_collection_item'][$fc_id]['field_uw_homepage_banners_link']['#items'][0]['url'])) {
        $html .= '</a>';
      }

      // Increment the index.
      $index++;

      // If there are not any more homepage banners, stop processing the homepage banners.
      if (!(isset($page['uw-virtual-site-homepage']['field_uw_homepage_banners'][$index]))) {
        $continue = FALSE;
      }

      // If there is more than one image add the paginator blocks.
      if ($num_of_images > 1) {
        // More html.
        $html .= '<div class="banner-controls">';

        // Set previous and next buttons.
        $html .= '<button id="previous_banner" class="tabs-previous"><</button>';
        $html .= '<button id="next_banner" class="tabs-next">></button>';

        // More html to close the homepage banners.
        $html .= '</div>';
        $html .= '</figure>';

        if ($pagenumber == 1) {
          $boxes .= '<li><a href="" title="display banner #' . $pagenumber . '" class="hpb_selected" data-pagenumber="' . $pagenumber . '"><span class="element-invisible">Display banner #</span>' . $pagenumber . '</a></li>';
        }
        else {
          $boxes .= '<li><a href="" title="display banner #' . $pagenumber . '" data-pagenumber="' . $pagenumber . '"><span class="element-invisible">Display banner #</span>' . $pagenumber . '</a></li>';
        }
      }
      else {
        $html .= '</figure>';
      }
    }

    // If there is more than one image, add the Play/Pause button.
    if ($num_of_images > 1) {
      // Final closing html and play/pause button.
      $html .= '</div>';
      $html .= '<button class="slideshow-control pause" title="Pause">';
      $html .= '<span class="element-invisible">Pause banner slideshow</span>';
      $html .= '<span class="icon-pause"></span>';
      $html .= '</button>';
      $html .= '<ul class="homepage_banners_paginator">';
      $html .= $boxes;
      $html .= '</ul>';
      $html .= '</div>';
    }
    else {
      // Close the opening HTML divs in homepage banners. if single image in banner.
      $html .= '</div>';
      $html .= '</div>';
    }

    // Set the html to the page variable.
    $page['uw_virtual_page_homepage_banners_html'] = $html;
  }

  // If there is credentials in the virutal site homepage settings, add it to the header.
  if (isset($page['uw-virtual-site-homepage']['field_uw_credentials'])) {
    if (isset($page['header_second']['boxes_site_info']['content']['#markup'])) {
      $page['header_second']['boxes_site_info']['content']['#markup'] = preg_replace('/<p>(.*)<a(.*)<\/a>/s', '<h2>' . $page['uw-virtual-site-homepage']['field_uw_credentials'][0]['#markup'] . '</h2>', $page['header_second']['boxes_site_info']['content']['#markup']);
    }
    elseif (isset($page['header_second']['boxes_site_info']['#markup']) && $page['header_second']['boxes_site_info']['#markup']) {
      $page['header_second']['boxes_site_info']['#markup'] = preg_replace('/<p>(.*)<a(.*)<\/a>/s', '<h2>' . $page['uw-virtual-site-homepage']['field_uw_credentials'][0]['#markup'] . '</h2>', $page['header_second']['boxes_site_info']['#markup']);
    }
  }
}

/**
 * Implements hook_form_alter().
 *
 * Form ID: _os_link_external_form
 * Hide target option field.
 */
function uw_virtual_site_homepage_form_alter(&$form, &$form_state, $form_id) {

  if ($form_id == "biblio_search_form") {
    $form['search_form']['#collapsed'] = FALSE;
    $form['search_form']['#collapsible'] = FALSE;

    if (isset($form['search_form']['filterform']['filters']['current'][0]['#markup'])) {
      if ($form['search_form']['filterform']['filters']['current'][0]['#markup'] !== "") {
        $form['search_form']['filterform']['filters']['#collapsed'] = FALSE;
      }
    }
  }
  if ($form_id == '_os_link_external_form' && isset($form['target_option'])) {
    unset($form['target_option']);
  }
}

/**
 * Implements hook_FORMID_form_alter().
 *
 * Removing options and placing data on the form for setting the virtual homepage.
 */
function uw_virtual_site_homepage_form_uw_virtual_site_homepage_node_form_alter(&$form, &$form_state, $form_id) {
  global $base_path;

  // Get current link.
  $url = request_uri();

  // Ensure that we don't replace all the slashes if just at top root.
  if ($base_path !== '/') {
    // Ensure that we are at the very base.
    $url = str_replace($base_path, '', $url);
  }

  // Break URL into its parts.
  $url_parts = explode('/', $url);

  // The username should be the first element in the url_parts array, set it to username.
  // If the first element is blank use the second element.
  if ($url_parts[0] == '') {
    $username = $url_parts[1];
  }
  else {
    $username = $url_parts[0];
  }

  // Set title to watiam id and disable title.
  $form['title']['#value'] = $username;
  $form['title']['#disabled'] = TRUE;
  $form['title']['#access'] = FALSE;

  // Removing elements from the page that we do not want set.
  $form['author']['#access'] = FALSE;
  $form['menu']['#access'] = FALSE;
  $form['path']['#access'] = FALSE;
  $form['options']['#access'] = FALSE;
  $form['og_group_ref']['#access'] = FALSE;
  $form['og_vocabulary']['#access'] = FALSE;
  $form['book']['#access'] = FALSE;
  $form['comment_settings']['#access'] = FALSE;

  // Getting the current space and loading that node.
  // This is the users vsite node.
  $space = spaces_get_space();
  $node = $space->group;

  // Adding the site information group to the form.
  $form['site_info'] = array(
    '#type' => 'fieldset',
    '#title' => t('Site Information'),
    '#weight' => -999,
  );

  // Adding the site title to the form.  This is at the top of every page.
  $form['site_info']['site_title'] = array(
    '#type' => 'textfield',
    '#title' => t('Name'),
    '#default_value' => $node->title,
    '#description' => t('Enter your name as the title of your site. This will appear at the top of every page (for example: Dr John Doe).'),
    '#size' => 60,
    '#required' => TRUE,
  );

  // Ensuring that we are getting a default value.
  if (isset($node->field_site_description[LANGUAGE_NONE][0]['value'])) {
    $default_value = $node->field_site_description[LANGUAGE_NONE][0]['value'];
  }
  else {
    $default_value = '';
  }

  // Move help text of site description from the bottom to the top of field_uw_site_description.
  if (isset($form['field_uw_site_description'][LANGUAGE_NONE][0]['#description'])) {
    $form['field_uw_site_description'][LANGUAGE_NONE][0]['#field_prefix'] = $form['field_uw_site_description'][LANGUAGE_NONE][0]['#description'];
    $form['field_uw_site_description'][LANGUAGE_NONE][0]['#description'] = '';
  }

  // Adding the site description to the page.  This is just below the site title and on every page.
  $form['site_info']['descrip'] = array(
    '#type' => 'textfield',
    '#title' => t('Title'),
    '#default_value' => $default_value,
    '#description' => t('Enter your academic role, position or title. This will appear under the site title at the top of every page (for example: Professor of Economics).'),
    '#size' => 60,
  );

  $form['site_info']['field_uw_credentials'] = $form['field_uw_credentials'];
  unset($form['field_uw_credentials']);

  // Adding the site information submit callback.
  $form['actions']['submit']['#submit'][] = 'uw_vitual_site_homepage_site_information_form_submit';

  // Adding the redirect back to the homepage after the save of the uw_virtual_site_homepage.
  $form['actions']['submit']['#submit'][] = 'uw_virtual_site_homepage_node_form_redirect';

  // Adding the validate for twitter.
  $form['#validate'][] = '_uw_virtual_site_homepage_twitter_validate';
}

/**
 * The validate for twitter.
 */
function _uw_virtual_site_homepage_twitter_validate(&$form, &$form_state) {

  // If there is a twitter username.
  if (isset($form_state['values']['field_uw_twitter_username'][LANGUAGE_NONE][0]['value'])) {

    // If the twitter username has a value.
    if ($form_state['values']['field_uw_twitter_username'][LANGUAGE_NONE][0]['value'] !== "") {

      // If there is a twitter type.
      if (isset($form_state['values']['field_uw_twitter_type'][LANGUAGE_NONE][0])) {

        // If the twitter type has no value, set a form error.
        if ($form_state['values']['field_uw_twitter_type'][LANGUAGE_NONE][0]['value'] == NULL) {

          // Set the form error.
          form_set_error('field-uw-twitter-username', 'You must select a place to display the twitter feed.');
        }
      }
    }
  }
}

/**
 * Submit callback.
 * Saves site title and site description.
 */
function uw_vitual_site_homepage_site_information_form_submit($form, &$form_state) {
  if (module_exists('vsite') && $space = spaces_get_space()) {
    // Getting the current space and loading that node.
    // This is the users vsite node.
    $node = $space->group;

    // Setting the title from the form.  This can not be blank and is validate because it is a required element on the form.
    $node->title = $form_state['values']['site_title'];

    // Setting the site description from the form.
    $node->field_site_description[LANGUAGE_NONE][0] = array(
      'value' => $form_state['values']['descrip'],
      'format' => NULL,
    );

    if (isset($form_state['value']['field_uw_credentials'])) {
      $node->field_uw_credentials[LANGUAGE_NONE][0] = array(
        'value' => $form_state['value']['field_uw_credentials'],
        'format' => NULL,
      );
    }

    // Ensuring that we get a save of the node which is the users vsite.
    try {
      node_save($node);
    }
    catch (Exception $e) {
      drupal_set_message(t('Error saving site information. Contact your site administrator.'), 'error');
      error_log($e);
    }
  }
}

/**
 * Submit callback.
 */
function uw_virtual_site_homepage_node_form_redirect($form, &$form_state) {
  // Clear the caches of the landing page info, in case the site title has changed.
  cache_clear_all('ctools_export:views_view:uw_os_number_of_sites', 'cache_views', TRUE);
  cache_clear_all('uw_os_number_of_sites', 'cache_views_data', TRUE);

  // Unset destination first.
  unset($_GET['destination']);
  unset($_REQUEST['edit']['destination']);

  // Redirecting to home page after a save.
  $form_state['redirect'] = 'home';
}

/**
 *
 */
function _uw_virtual_site_homepage_get_site_links() {
  // Array that stores all of links.
  $site_links['University of Waterloo'] = 'https://uwaterloo.ca';
  $site_links['Applied Health Sciences'] = 'https://uwaterloo.ca/applied-health-sciences/';
  $site_links['Applied Health Sciences - Recreation and Leisure Studies'] = 'https://uwaterloo.ca/recreation-and-leisure-studies/';
  $site_links['Applied Health Sciences - Kinesiology'] = 'https://uwaterloo.ca/kinesiology/';
  $site_links['Applied Health Sciences - Public Health'] = 'https://uwaterloo.ca/public-health-and-health-systems/';
  $site_links['Arts'] = 'https://uwaterloo.ca/arts/';
  $site_links['Arts - Anthropology'] = 'https://uwaterloo.ca/anthropology/';
  $site_links['Arts - Classical Studies'] = 'https://uwaterloo.ca/classical-studies/';
  $site_links['Arts - Drama Speech Communication'] = 'https://uwaterloo.ca/drama-speech-communication/';
  $site_links['Arts - Economics'] = 'https://uwaterloo.ca/economics/';
  $site_links['Arts - English Language Literature'] = 'https://uwaterloo.ca/english/';
  $site_links['Arts - Fine Arts'] = 'https://uwaterloo.ca/fine-arts/';
  $site_links['Arts - French'] = 'https://uwaterloo.ca/french-studies/';
  $site_links['Arts - Germanic Slavic Studies'] = 'https://uwaterloo.ca/germanic-slavic-studies/';
  $site_links['Arts - History'] = 'https://uwaterloo.ca/history/';
  $site_links['Arts - Philosophy'] = 'https://uwaterloo.ca/philosophy/';
  $site_links['Arts - Political Science'] = 'https://uwaterloo.ca/political-science/';
  $site_links['Arts - Psychology'] = 'https://uwaterloo.ca/psychology/';
  $site_links['Arts - Religious Studies'] = 'https://uwaterloo.ca/religious-studies/';
  $site_links['Arts - School of Accounting and Finance'] = 'https://uwaterloo.ca/school-of-accounting-and-finance/';
  $site_links['Arts - Sociology and Legal Studies'] = 'https://uwaterloo.ca/sociology-and-legal-studies/';
  $site_links['Arts - Spanish and Latin American Studies'] = 'https://uwaterloo.ca/spanish/';
  $site_links['Engineering'] = 'https://uwaterloo.ca/engineering/';
  $site_links['Engineering wordmark'] = 'https://uwaterloo.ca/engineering/';
  $site_links['Engineering - Architecture'] = 'https://uwaterloo.ca/architecture/';
  $site_links['Engineering - Chemical Engineering'] = 'https://uwaterloo.ca/chemical-engineering/';
  $site_links['Engineering - Civil Environmental Engineering'] = 'https://uwaterloo.ca/civil-environmental-engineering/';
  $site_links['Engineering - Electrical Computer Engineering'] = 'https://uwaterloo.ca/electrical-computer-engineering/';
  $site_links['Engineering - Management Sciences'] = 'https://uwaterloo.ca/management-sciences/';
  $site_links['Engineering - Mechanical Engineering'] = 'https://uwaterloo.ca/mechanical-mechatronics-engineering/';
  $site_links['Engineering - Systems Design Engineering'] = 'https://uwaterloo.ca/systems-design-engineering/';
  $site_links['Environment'] = 'https://uwaterloo.ca/environment/';
  $site_links['Environment - Environment Enterprise Development'] = 'https://uwaterloo.ca/school-environment-enterprise-development/';
  $site_links['Environment - Enviromental Resources and Sustainability'] = 'https://uwaterloo.ca/environment-resources-and-sustainability/';
  $site_links['Environment - Geography Environmental and Management'] = 'https://uwaterloo.ca/geography-environmental-management/';
  $site_links['Environment - Knowledge Intergration'] = 'https://uwaterloo.ca/knowledge-integration/';
  $site_links['Environment - Planning'] = 'https://uwaterloo.ca/planning/';
  $site_links['Mathematics'] = 'https://uwaterloo.ca/math/';
  $site_links['Mathematics - Applied Math'] = 'https://uwaterloo.ca/applied-mathematics/';
  $site_links['Mathematics - Combinatorics and Optimization'] = 'https://uwaterloo.ca/combinatorics-and-optimization/';
  $site_links['Mathematics - Computer Science'] = 'https://cs.uwaterloo.ca/';
  $site_links['Mathematics - Pure Math'] = 'https://uwaterloo.ca/pure-mathematics/';
  $site_links['Mathematics - Statistics Actuarial Science'] = 'https://uwaterloo.ca/statistics-and-actuarial-science/';
  $site_links['Science'] = 'https://uwaterloo.ca/science/';
  $site_links['Sciecne - Pharmacy'] = 'https://uwaterloo.ca/pharmacy/';
  $site_links['Science - Biology'] = 'https://uwaterloo.ca/biology/';
  $site_links['Science - Chemistry'] = 'https://uwaterloo.ca/chemistry/';
  $site_links['Science- Earth and Environmental Science'] = 'https://uwaterloo.ca/earth-environmental-sciences/';
  $site_links['Science - Optometry and Vision Science'] = 'https://uwaterloo.ca/optometry-vision-science/';
  $site_links['Science - Physics and Astronomy'] = 'https://uwaterloo.ca/physics-astronomy/';
  $site_links['Conrad Grebel'] = 'https://uwaterloo.ca/grebel/';
  $site_links['Renison University College'] = 'https://uwaterloo.ca/renison/';
  $site_links['St. Jerome\'s University'] = 'https://www.sju.ca/';
  $site_links['St. Jerome\'s University'] = 'https://www.sju.ca/';
  $site_links['St. Paul\'s University College'] = 'https://uwaterloo.ca/stpauls/';
  $site_links['McMaster University'] = 'http://www.mcmaster.ca/';
  $site_links['University of Guelph'] = 'http://www.uoguelph.ca/';
  $site_links['Water Institute'] = 'https://uwaterloo.ca/water-institute/';
  $site_links['Western University'] = 'http://www.uwo.ca/';
  $site_links['Wilfrid Laurier University'] = 'https://www.wlu.ca/';

  return $site_links;
}