MDL-84903 mdl_bigbluebuttonbn: overrides view through bbbext plugins

public/mod/bigbluebuttonbn/classes/extension.php

@@ -24,6 +24,7 @@ use mod_bigbluebuttonbn\local\extension\mod_form_addons;
 use mod_bigbluebuttonbn\local\extension\mod_instance_helper;
 use mod_bigbluebuttonbn\local\extension\navigation_append_addon;
 use mod_bigbluebuttonbn\local\extension\navigation_override_addon;
+use mod_bigbluebuttonbn\local\extension\view_page_addons;
 use stdClass;
 use core_plugin_manager;
 use core_component;
@@ -291,4 +292,23 @@ class extension {
         }
         return false;
     }
+
+    /**
+     * Get rendered output for override in the instance.
+     *
+     * @param \renderer_base $renderer
+     * @param instance $instance
+     * @return string|null Rendered information for the instance, or null if no override found.
+     */
+    public static function get_rendered_output_override($renderer, $instance): ?string {
+        $classes = self::get_classes_implementing(view_page_addons::class);
+        if (!empty($classes)) {
+            $outputclass = reset($classes);
+            if (class_exists($outputclass)) {
+                return $renderer->render(new $outputclass($instance));
+            }
+        }
+        // Fallback to the default rendered output if no subplugin overrides it.
+        return null;
+    }
 }

public/mod/bigbluebuttonbn/classes/local/extension/view_page_addons.php

@@ -0,0 +1,28 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace mod_bigbluebuttonbn\local\extension;
+
+/**
+ * A single action class to mutate the action URL.
+ *
+ * @package   mod_bigbluebuttonbn
+ * @copyright 2025 onwards, Blindside Networks Inc
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @author    Jesus Federico  (jesus [at] blindsidenetworks [dt] com)
+ */
+abstract class view_page_addons extends \mod_bigbluebuttonbn\output\view_page {
+}

public/mod/bigbluebuttonbn/classes/output/renderer.php

@@ -85,19 +85,6 @@ class renderer extends plugin_renderer_base {
         return $groupsmenu . '<br><br>';
     }
 
-    /**
-     * Render the view page.
-     *
-     * @param view_page $page
-     * @return string
-     */
-    public function render_view_page(view_page $page): string {
-        return $this->render_from_template(
-            'mod_bigbluebuttonbn/view_page',
-            $page->export_for_template($this)
-        );
-    }
-
     /**
      * Render inplace editable
      *

public/mod/bigbluebuttonbn/classes/output/view_page.php

@@ -55,12 +55,20 @@ class view_page implements renderable, templatable {
      * @param renderer_base $output
      * @return stdClass
      */
-    public function export_for_template(renderer_base $output): stdClass {
+    public function export_for_template(renderer_base $output): \stdClass {
+        // By default use group selector from the plugin renderer.
+        global $PAGE;
+        $pluginrenderer = $PAGE->get_renderer('mod_bigbluebuttonbn');
+        $groupselector = $pluginrenderer->render_groups_selector($this->instance);
+        if (method_exists($output, 'render_groups_selector')) {
+            // If the output renderer supports the method, override it.
+            $groupselector = $output->render_groups_selector($this->instance);
+        }
         $pollinterval = bigbluebutton_proxy::get_poll_interval();
         $templatedata = (object) [
             'instanceid' => $this->instance->get_instance_id(),
             'pollinterval' => $pollinterval * 1000, // Javascript poll interval is in miliseconds.
-            'groupselector' => $output->render_groups_selector($this->instance),
+            'groupselector' => $groupselector,
             'meetingname' => $this->instance->get_meeting_name(),
             'description' => $this->instance->get_meeting_description(true),
             'joinurl' => $this->instance->get_join_url(),
@@ -145,5 +153,4 @@ class view_page implements renderable, templatable {
 
         return false;
     }
-
 }

public/mod/bigbluebuttonbn/tests/behat/subplugins.feature

@@ -1,4 +1,4 @@
-@mod @mod_bigbluebuttonbn @with_bbbext_simple
+@mod @mod_bigbluebuttonbn @with_bbbext_simple @with_bbbext_complex
 Feature: BigBlueButtonBN Subplugins test
   As a BigBlueButtonBN user
   I can list the subplugins the admin settings pages
@@ -137,3 +137,13 @@ Feature: BigBlueButtonBN Subplugins test
     And I am on the "BBB Instance name" "bigbluebuttonbn activity" page logged in as "admin"
     Then I should see "Override Navigation"
     And I should not see "Append Navigation"
+
+  @javascript
+  Scenario: I check that subplugins can override the view
+    Given I log in as "admin"
+    And I am on the "BBB Instance name" "bigbluebuttonbn activity" page logged in as "admin"
+    And I should not see "Hello from complex::renderer!"
+    And I navigate to "Plugins > Activity modules > BigBlueButton > Manage BigBlueButton extension plugins" in site administration
+    And I click on "Enable" "link" in the "Complex" "table_row"
+    When I am on the "BBB Instance name" "bigbluebuttonbn activity" page logged in as "admin"
+    And I should see "Hello from complex::renderer!"

public/mod/bigbluebuttonbn/tests/fixtures/extension/complex/classes/bigbluebuttonbn/view_page_addons.php

@@ -0,0 +1,56 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace bbbext_complex\bigbluebuttonbn;
+
+use stdClass;
+use mod_bigbluebuttonbn\instance;
+
+/**
+ * View Page template renderable.
+ *
+ * @package   mod_bigbluebuttonbn
+ * @copyright 2025 onwards, Blindside Networks Inc
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @author    Jesus Federico  (jesus [at] blindsidenetworks [dt] com)
+ */
+class view_page_addons extends \mod_bigbluebuttonbn\local\extension\view_page_addons {
+    /** @var instance The instance being rendered */
+    protected $instance;
+
+    /**
+     * Constructor for the View Page.
+     *
+     * @param instance $instance
+     */
+    public function __construct(instance $instance) {
+        $this->instance = $instance;
+    }
+
+    /**
+     * Export the content required to render the template.
+     *
+     * @param mixed $renderer The renderer instance (matches parent signature).
+     * @return stdClass
+     */
+    public function export_for_template($renderer): \stdClass {
+        return (object) [
+            'message' => 'Hello from complex::renderer!',
+            'meetingname' => $this->instance->get_meeting_name(),
+            'description' => $this->instance->get_meeting_description(true),
+        ];
+    }
+}

public/mod/bigbluebuttonbn/tests/fixtures/extension/complex/templates/view_page_addons.mustache

@@ -0,0 +1,46 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template bbbext_complex/view_page
+
+    This template renders the /view_page.php page.
+
+    Example context (json):
+    {
+        "instanceid": 1234,
+        "meetingname": "My first meeting",
+        "meetingdescription": "This is my <strong>first</strong> meeting!",
+        "serverwarning": true,
+        "sitenotification": {
+            "message": "Unlock premium feature",
+            "actions": [
+                {
+                    "url": "https://example.com/",
+                    "name": "action",
+                    "value": "buy",
+                    "title": "Upgrade now"
+                }
+            ]
+        },
+        "pollinterval": 5
+    }
+
+}}
+<h1>View Page</h1>
+<div class="alert alert-info">
+    {{message}}
+</div>

public/mod/bigbluebuttonbn/view.php

@@ -25,6 +25,7 @@
  * @author    Darko Miletic  (darko.miletic [at] gmail [dt] com)
  */
 
+use mod_bigbluebuttonbn\extension;
 use mod_bigbluebuttonbn\instance;
 use mod_bigbluebuttonbn\local\config;
 use mod_bigbluebuttonbn\local\exceptions\server_not_available_exception;
@@ -81,7 +82,11 @@ $PAGE->set_heading($course->fullname);
 $renderer = $PAGE->get_renderer('mod_bigbluebuttonbn');
 
 try {
-    $renderedinfo = $renderer->render(new view_page($instance));
+    $renderedinfo = extension::get_rendered_output_override($renderer, $instance);
+    if (!$renderedinfo) {
+        // If no override is found, use the default view_page renderable.
+        $renderedinfo = $renderer->render(new view_page($instance));
+    }
 } catch (server_not_available_exception $e) {
     bigbluebutton_proxy::handle_server_not_available($instance);
 }