MDL-86724 hub: Registration collects disk usage data

public/lang/en/hub.php

@@ -47,6 +47,7 @@ $string['coursesnumber'] = 'Number of courses ({$a})';
 $string['dbtype'] = 'Database type ({$a})';
 $string['demourl'] = 'Demo URL';
 $string['demourl_help'] = 'Enter the demo URL of your course. By default it is the URL of your course. The demo URL is displayed as a link in a search result.';
+$string['diskusagesize'] = 'Disk usage size ({$a} MB)';
 $string['downloadable'] = 'Downloadable';
 $string['educationallevel'] = 'Educational level';
 $string['educationallevel_help'] = 'Select the most appropriate educational level that the course fits into.';

public/lib/classes/hub/registration.php

@@ -68,6 +68,8 @@ class registration {
         2023072300 => ['pluginusage'],
         // AI usage added in Moodle 4.5.
         2023081200 => ['aiusage'],
+        // Disk usage added in Moodle 5.2.
+        2025100900 => ['diskusage'],
     ];
 
     /** @var string Site privacy: not displayed */
@@ -209,6 +211,9 @@ class registration {
         $aiusagedata = self::get_ai_usage_data();
         $siteinfo['aiusage'] = !empty($aiusagedata) ? json_encode($aiusagedata) : '';
 
+        // Disk usage size.
+        $siteinfo['diskusage'] = self::get_dataroot_size() ?? 0;
+
         // Primary auth type.
         $primaryauthsql = 'SELECT auth, count(auth) as tc FROM {user} GROUP BY auth ORDER BY tc DESC';
         $siteinfo['primaryauthtype'] = $DB->get_field_sql($primaryauthsql, null, IGNORE_MULTIPLE);
@@ -299,6 +304,7 @@ class registration {
             'primaryauthtype' => get_string('primaryauthtype', 'hub', $siteinfo['primaryauthtype']),
             'pluginusage' => get_string('pluginusagedata', 'hub', $pluginusagelinks),
             'aiusage' => $OUTPUT->render_from_template('core/ai_usage_data', ['aiusagedata' => self::show_ai_usage()]),
+            'diskusage' => get_string('diskusagesize', 'hub', $siteinfo['diskusage']),
         ];
 
         foreach ($senddata as $key => $str) {
@@ -942,4 +948,17 @@ class registration {
 
         return $data;
     }
+
+    /**
+     * Measure the size of the dataroot directory.
+     *
+     * @return float MB to 3 decimal places.
+     */
+    public static function get_dataroot_size(): float {
+        global $CFG;
+        $size = get_directory_size($CFG->dataroot);
+        // Convert bytes to megabytes.
+        $size = $size / (1024 * 1024);
+        return round($size, 3);
+    }
 }

public/lib/tests/hub/registration_test.php

@@ -46,6 +46,7 @@ final class registration_test extends \advanced_testcase {
         $this->assertEquals($CFG->dbtype, $siteinfo['dbtype']);
         $this->assertEquals('manual', $siteinfo['primaryauthtype']);
         $this->assertEquals(1, $siteinfo['coursesnodates']);
+        $this->assertGreaterThan(0, $siteinfo['diskusage']);
     }
 
     /**