MDL-82297 core: Add notification to warn admins

* In Moodle 5.0 we will remove Chat and Survey module
and we will need to announce it beforehand

admin/renderer.php

@@ -295,6 +295,7 @@ class core_admin_renderer extends plugin_renderer_base {
 
         $output .= $this->header();
         $output .= $this->output->heading(get_string('notifications', 'admin'));
+        $output .= $this->upgrade_news_message();
         $output .= $this->maturity_info($maturity);
         $output .= empty($CFG->disableupdatenotifications) ? $this->available_updates($availableupdates, $availableupdatesfetch) : '';
         $output .= $this->insecure_dataroot_warning($insecuredataroot);
@@ -754,6 +755,22 @@ class core_admin_renderer extends plugin_renderer_base {
         return $this->box($copyrighttext, 'copyright');
     }
 
+    /**
+     * Display a transient notification for important upgrades messages for
+     * specific releases.
+     *
+     * @return string HTML to output.
+     */
+    protected function upgrade_news_message() {
+        return $this->notification(
+            get_string('importantupdates_content', 'admin'),
+            'info',
+            false,
+            get_string('importantupdates_title', 'admin'),
+            'i/circleinfo, core'
+        );
+    }
+
     /**
      * Display a warning about installing development code if necesary.
      * @param int $maturity

lang/en/admin.php

@@ -762,6 +762,11 @@ $string['taskh5pcleanup'] = 'Unused H5P files cleanup';
 $string['iconvrequired'] = 'Installing ICONV extension is required.';
 $string['igbinary322buggyversion'] = 'The php-igbinary extension installed on the site can lead to problems when running with PHP 7.2. You are recommended to either upgrade to php-igbinary 3.2.5 or later, or alternatively to upgrade to PHP 7.3 or later.';
 $string['ignore'] = 'Ignore';
+$string['importantupdates_content'] = '<p>In the next Moodle 5.0, planned for release in April 2025, the Chat and Survey activities will
+be removed from core Moodle. They will be available as plugins in the
+<a href="https://moodle.org/plugins/">Moodle plugins directory</a>.</p>
+<p>If you wish to continue using Chat or Survey in your site, you will be able to install them as plugins before upgrading to Moodle 5.0.</p>';
+$string['importantupdates_title'] = 'Important update about Chat and Survey activities';
 $string['includemoduleuserdata'] = 'Include module user data';
 $string['incompatibleblocks'] = 'Incompatible blocks';
 $string['indexdata'] = 'Index data';

theme/boost/scss/moodle/admin.scss

@@ -427,6 +427,11 @@
     text-align: center;
 }
 
+#page-admin-index #page-content a {
+    font-weight: normal;
+    text-decoration: underline;
+}
+
 // Plugins overview page at admin/plugins.php
 #page-admin-plugins {
     #plugins-overview-panel {

theme/boost/style/moodle.css

@@ -26839,6 +26839,11 @@ img.icon {
   text-align: center;
 }
 
+#page-admin-index #page-content a {
+  font-weight: normal;
+  text-decoration: underline;
+}
+
 #page-admin-plugins #plugins-overview-panel .info {
   display: inline-block;
   margin-right: 1em;

theme/classic/style/moodle.css

@@ -26839,6 +26839,11 @@ img.icon {
   text-align: center;
 }
 
+#page-admin-index #page-content a {
+  font-weight: normal;
+  text-decoration: underline;
+}
+
 #page-admin-plugins #plugins-overview-panel .info {
   display: inline-block;
   margin-right: 1em;