MDL-82132 user: re-factor code for generating dummy user fullname.

.upgradenotes/MDL-82132-2025041514493372.yml

@@ -0,0 +1,7 @@
+issueNumber: MDL-82132
+notes:
+  core_user:
+    - message: >-
+        New method `\core_user::get_dummy_fullname(...)` for returning dummy
+        user fullname comprised of configured name fields only
+      type: improved

lib/classes/user.php

@@ -1518,6 +1518,22 @@ class user {
         return $displayname;
     }
 
+    /**
+     * Return fullname of a dummy user comprised of configured name fields only
+     *
+     * @param context|null $context
+     * @param array $options
+     * @return string
+     */
+    public static function get_dummy_fullname(?context $context = null, array $options = []): string {
+
+        // Create a dummy user object containing all name fields.
+        $namefields = \core_user\fields::get_name_fields();
+        $user = (object) array_combine($namefields, $namefields);
+
+        return static::get_fullname($user, $context, $options);
+    }
+
     /**
      * Return profile url depending on context.
      *
@@ -1588,10 +1604,10 @@ class user {
     public static function get_initials(stdClass $user): string {
         // Get the available name fields.
         $namefields = \core_user\fields::get_name_fields();
-        // Build a dummy user to determine the name format.
-        $dummyuser = array_combine($namefields, $namefields);
+
         // Determine the name format by using fullname() and passing the dummy user.
-        $nameformat = fullname((object) $dummyuser);
+        $nameformat = static::get_dummy_fullname();
+
         // Fetch all the available username fields.
         $availablefields = order_in_string($namefields, $nameformat);
         // We only want the first and last name fields.

lib/tests/user_test.php

@@ -876,6 +876,32 @@ final class user_test extends \advanced_testcase {
         $this->assertEquals('John Doe', \core_user::get_fullname($user, $context, $options));
     }
 
+    /**
+     * Test retrieving dummy user fullname
+     *
+     * @covers \core_user::get_dummy_fullname
+     */
+    public function test_get_dummy_fullname(): void {
+        $context = \context_system::instance();
+
+        // Show real name as the force names config are not set.
+        $this->assertEquals('firstname lastname', \core_user::get_dummy_fullname($context));
+
+        // With override, still show real name.
+        $options = ['override' => true];
+        $this->assertEquals('firstname lastname', \core_user::get_dummy_fullname($context, $options));
+
+        // Set the alternative names config.
+        set_config('alternativefullnameformat', 'alternatename lastname firstname');
+
+        // Show default name format.
+        $this->assertEquals('firstname lastname', \core_user::get_dummy_fullname($context));
+
+        // With override, show alternative name format.
+        $options = ['override' => true];
+        $this->assertEquals('alternatename lastname firstname', \core_user::get_dummy_fullname($context, $options));
+    }
+
     /**
      * Test for function to get user details.
      *

reportbuilder/classes/local/entities/user.php

@@ -24,6 +24,7 @@ use context_user;
 use core\context;
 use core_component;
 use core_date;
+use core_user;
 use html_writer;
 use lang_string;
 use moodle_url;
@@ -397,10 +398,8 @@ class user extends base {
 
         $namefields = fields::get_name_fields(true);
 
-        // Create a dummy user object containing all name fields.
-        $dummyuser = (object) array_combine($namefields, $namefields);
         $viewfullnames = has_capability('moodle/site:viewfullnames', context_system::instance());
-        $dummyfullname = fullname($dummyuser, $viewfullnames);
+        $dummyfullname = core_user::get_dummy_fullname(null, ['override' => $viewfullnames]);
 
         // Extract any name fields from the fullname format in the order that they appear.
         $matchednames = array_values(order_in_string($namefields, $dummyfullname));

user/classes/fields.php

@@ -17,6 +17,7 @@
 namespace core_user;
 
 use core_text;
+use core_user;
 
 /**
  * Class for retrieving information about user fields that are needed for displaying user identity.
@@ -585,10 +586,7 @@ class fields {
         $unique = self::$uniqueidentifier++;
 
         $namefields = self::get_name_fields();
-
-        // Create a dummy user object containing all name fields.
-        $dummyuser = (object) array_combine($namefields, $namefields);
-        $dummyfullname = fullname($dummyuser, $override);
+        $dummyfullname = core_user::get_dummy_fullname(null, ['override' => $override]);
 
         // Extract any name fields from the fullname format in the order that they appear.
         $matchednames = array_values(order_in_string($namefields, $dummyfullname));