MDL-82512 files: Add Author filter to files Report Builder entity

files/classes/reportbuilder/local/entities/file.php

@@ -393,6 +393,16 @@ class file extends base {
                 return $mimetypes;
             });
 
+        // Author.
+        $filters[] = (new filter(
+            text::class,
+            'author',
+            new lang_string('author', 'core_repository'),
+            $this->get_entity_name(),
+            "{$filesalias}.author"
+        ))
+            ->add_joins($this->get_joins());
+
         // License (consider null = 'unknown/license not specified' for filtering purposes).
         $filters[] = (new filter(
             select::class,

files/tests/reportbuilder/datasource/files_test.php

@@ -231,6 +231,12 @@ final class files_test extends core_reportbuilder_testcase {
                 'file:type_operator' => select::EQUAL_TO,
                 'file:type_value' => 'image/png',
             ], 0],
+            'Filter author' => ['file:author', [
+                'file:author_operator' => text::IS_EMPTY,
+            ], 4],
+            'Filter author (non match)' => ['file:author', [
+                'file:author_operator' => text::IS_NOT_EMPTY,
+            ], 0],
             'Filter license' => ['file:license', [
                 'file:license_operator' => select::EQUAL_TO,
                 'file:license_value' => 'unknown',