MDL-81144 tool_mobile: Standarise hook locations

admin/tool/mobile/classes/hook_callbacks.php

@@ -26,6 +26,34 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class hook_callbacks {
+    /**
+     * Callback to add head elements.
+     *
+     * @param \core\hook\output\before_standard_head_html_generation $hook
+     */
+    public static function before_standard_head_html_generation(
+        \core\hook\output\before_standard_head_html_generation $hook,
+    ): void {
+        global $CFG, $PAGE;
+        // Smart App Banners meta tag is only displayed if mobile services are enabled and configured.
+        if (!empty($CFG->enablemobilewebservice)) {
+            $mobilesettings = get_config('tool_mobile');
+            if (!empty($mobilesettings->enablesmartappbanners)) {
+                if (!empty($mobilesettings->iosappid)) {
+                    $hook->add_html(
+                        '<meta name="apple-itunes-app" content="app-id=' . s($mobilesettings->iosappid) . ', ' .
+                            'app-argument=' . $PAGE->url->out() . '"/>'
+                    );
+                }
+
+                if (!empty($mobilesettings->androidappid)) {
+                    $mobilemanifesturl = "$CFG->wwwroot/$CFG->admin/tool/mobile/mobile.webmanifest.php";
+                    $hook->add_html('<link rel="manifest" href="' . $mobilemanifesturl . '" />');
+                }
+            }
+        }
+    }
+
     /**
      * Callback to add head elements.
      *

admin/tool/mobile/db/hooks.php

@@ -27,8 +27,7 @@
 $callbacks = [
     [
         'hook' => \core\hook\output\before_standard_head_html_generation::class,
-        'callback' => [\tool_mobile\local\hook\output\before_standard_head_html_generation::class, 'callback'],
-        'priority' => 0,
+        'callback' => [\tool_mobile\hook_callbacks::class, 'before_standard_head_html_generation'],
     ],
     [
         'hook' => \core\hook\output\before_standard_footer_html_generation::class,