Add favicons (not sure if manifest format will work)

uw_fdsu_theme_resp.theme

@@ -26,13 +26,50 @@ require_once dirname(__FILE__) . '/includes/views.inc';
 /**
  * Implements hook_preprocess_HOOK().
  *
- * Setting the faculty class colour.
+ * Setting the faculty class colour and favicon information.
  */
 function uw_fdsu_theme_resp_preprocess_html(&$variables) {
 
   // Adding the faculty colour class to the body.
   $variables['attributes']['class'][] = theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') ? theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') : 'org-default';
   $variables['uw_admin_page'] = \Drupal::service('uw_cfg_common.uw_analytics')->administrationPage();
+
+  // Remove Drupal's favicon.
+  foreach ($variables['page']['#attached']['html_head_link'] as $id => $html_head_link) {
+    if (isset($html_head_link[0]['rel']) && $html_head_link[0]['rel'] == 'shortcut icon') {
+      unset($variables['page']['#attached']['html_head_link'][$id]);
+      break;
+    }
+  }
+
+  // Specify new favicon locations.
+  // Based on https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs.
+  $favicon = [
+    'rel' => 'icon',
+    'href' => base_path() . drupal_get_path('theme','uw_fdsu_theme_resp') . '/favicon.ico',
+  ];
+  $variables['page']['#attached']['html_head_link'][] = [$favicon];
+  $favicon_svg = [
+    'rel' => 'icon',
+    'href' => base_path() . drupal_get_path('theme','uw_fdsu_theme_resp') . '/icon.svg',
+    'type' => 'image/svg+xml',
+  ];
+  $variables['page']['#attached']['html_head_link'][] = [$favicon_svg];
+  $favicon_apple = [
+    'rel' => 'apple-touch-icon',
+    'href' => base_path() . drupal_get_path('theme','uw_fdsu_theme_resp') . '/apple-touch-icon.png',
+  ];
+  $variables['page']['#attached']['html_head_link'][] = [$favicon_apple];
+  $favicon_manifest = [
+    'rel' => 'manifest',
+    'href' => 'data:application/manifest+json,{
+      "icons": [
+        { "src": "' . base_path() . drupal_get_path('theme','uw_fdsu_theme_resp') . '/icon-192.png", "type": "image/png", "sizes": "192x192" },
+        { "src": "' . base_path() . drupal_get_path('theme','uw_fdsu_theme_resp') . '/icon-512.png", "type": "image/png", "sizes": "512x512" }
+      ]
+    }',
+  ];
+  $variables['page']['#attached']['html_head_link'][] = [$favicon_manifest];
 }
 
 /**