ISTWCMS-4199: adding prepreprocessing for the header region to add the main...

ISTWCMS-4199: adding prepreprocessing for the header region to add the main menu with the menu_items_count that is required for the size of the tray on the main menu

uw_fdsu_theme_resp.theme

@@ -53,6 +53,41 @@ function uw_fdsu_theme_resp_preprocess_responsive_image(&$variables) {
   $variables['sources'] = $new_sources;
 }
 
+/**
+ * A recursive function to count the number of menu items.
+ *
+ * @param $menus
+ *   The array list of menu items.
+ * @param $menu_items_count
+ *   The reference to the number of items variable.
+ */
+function _uw_fdsu_theme_resp_count_menu_items($menus, &$menu_items_count) {
+
+  // Step through each of the menus.
+  foreach ($menus as $menu) {
+
+    // If there is a submenu, then recursively go down through the list,
+    // until we get to place that doesnt have a submenu and we will
+    // increment the menu items count.
+    if (isset($menu['submenu']) && count($menu['submenu'] > 0)) {
+
+      // Step through each of the submenus and send back to this function.
+      foreach ($menu['submenus'] as $submenu) {
+
+        // Keep calling this function until we have no submenus.
+        _uw_fdsu_theme_resp_count_menu_items($submenu, $menu_items_count);
+      }
+    }
+
+    // Here we have no submenus, so increment the menu items counter.
+    else {
+
+      // Increment the menu items counter.
+      $menu_items_count++;
+    }
+  }
+}
+
 /**
  * Implements hook_preprocess_region().
  */
@@ -66,6 +101,73 @@ function uw_fdsu_theme_resp_preprocess_region(&$variables) {
   // (i.e. faculty colour and get the correct class here).
   if ($region == "header") {
 
+    // Get the main menu from the simplify menu module.
+    $main_menu = \Drupal::service('simplify_menu.menu_items')->getMenuTree('main');
+
+    // Set it to the menu_tree which is done by simplify menu.
+    $main_menu = $main_menu['menu_tree'];
+
+    // Step through the menu and do a few things:
+    // (a) Remove the Home link (this will be a house icon)
+    // (b) Add the number of menu items per menu link.
+    foreach ($main_menu as $index => $menu) {
+
+      // If this is the Home link, then remove it.
+      if ($menu['text'] == "Home") {
+
+        // Remove the home link.
+        unset($main_menu[$index]);
+      }
+
+      // If we are not on the home link, then add the number
+      // of menu items in this menu link.
+      else {
+
+        // Set the menu_item_count, initially to 0.
+        $menu_item_count = 0;
+
+        // If there is a submenu, recursivley call the count function.
+        if (isset($menu['submenu']) && count($menu['submenu']) > 0) {
+
+          // Call the count function recursively till we have the number of
+          // menu items.
+          _uw_fdsu_theme_resp_count_menu_items($menu, $menu_item_count);
+
+          // Now that we have a count of the number of menu items, we need to
+          // increment it by one as the main menu will also contain a link
+          // to the parent (itself) in the Tray.
+          // For example, the menu structure will look like:
+          // Parent (click box in the menu)
+          // Parent (link to the the Parent)
+          //   Child #1
+          //     Grandchild #1-1
+          //     Grandchild #1-2
+          //   Child #2
+          //   Child #3
+          //     Grandchild #3-1
+          //        Great grandchild #3-1-1
+          //        Great grandchild #3-1-2
+          //     Grandchild #3-2
+          //     Grandchild #3-3
+          //        Great grandchild #3-3-1
+          // So it should with the recursive function it will return 11,
+          // however as we are printing the parent again in the tray, we
+          // actually need 12, so hence the increase by1.
+          $main_menu[$index]['menu_items_count'] = $menu_item_count + 1;
+        }
+
+        // If there are no submenus, the count is 0, there will be no tray.
+        else {
+
+          // Set the number of items count, which is 0.
+          $main_menu[$index]['menu_items_count'] = $menu_item_count;
+        }
+      }
+    }
+
+    // Set the main menu variable.
+    $variables['main_menu'] = $main_menu;
+
     // The class that is used for the header.
     $variables['classes'][] = 'uw-header';