MDL-44646 administration: Users can be filtered by course enrollment

admin/tests/behat/filter_users.feature

@@ -65,3 +65,20 @@ Feature: An administrator can filter user accounts by role, cohort and other pro
     And I should not see "User Two"
     And I should not see "User Three"
     And I should not see "User Four"
+
+  Scenario: Filter user accounts by enrolled in any course
+    When I set the following fields to these values:
+      | id_anycourses | Yes |
+    And I press "Add filter"
+    Then I should see "User One"
+    And I should see "User Two"
+    And I should see "User Three"
+    And I should not see "User Four"
+    And I press "Remove all filters"
+    And I set the following fields to these values:
+      | id_anycourses | No |
+    And I press "Add filter"
+    And I should not see "User One"
+    And I should not see "User Two"
+    And I should not see "User Three"
+    And I should see "User Four"

lang/en/filters.php

@@ -26,6 +26,7 @@
 $string['addfilter'] = 'Add filter';
 $string['anycategory'] = 'any category';
 $string['anycourse'] = 'any course';
+$string['anycourses'] = 'Enrolled in any course';
 $string['anyfield'] = 'any field';
 $string['anyrole'] = 'any role';
 $string['anyvalue'] = 'any value';

user/filters/anycourses.php

@@ -0,0 +1,49 @@
+<?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/>.
+
+/**
+ * This is filter is used to see which students are enroled on any courses
+ *
+ * @package   core_user
+ * @copyright 2014 Krister Viirsaar
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * User filter to distinguish users with no or any enroled courses.
+ * @copyright 2014 Krister Viirsaar
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class user_filter_anycourses extends user_filter_yesno {
+
+    /**
+     * Returns the condition to be used with SQL
+     *
+     * @param array $data filter settings
+     * @return array sql string and $params
+     */
+    public function get_sql_filter($data) {
+        $value = $data['value'];
+
+        $not = $value ? '' : 'NOT';
+
+        return array("EXISTS ( SELECT userid FROM {user_enrolments} ) AND " .
+            " id $not IN ( SELECT userid FROM {user_enrolments} )", array());
+    }
+}
+

user/filters/lib.php

@@ -31,6 +31,7 @@
 require_once($CFG->dirroot.'/user/filters/globalrole.php');
 require_once($CFG->dirroot.'/user/filters/profilefield.php');
 require_once($CFG->dirroot.'/user/filters/yesno.php');
+require_once($CFG->dirroot.'/user/filters/anycourses.php');
 require_once($CFG->dirroot.'/user/filters/cohort.php');
 require_once($CFG->dirroot.'/user/filters/user_filter_forms.php');
 require_once($CFG->dirroot.'/user/filters/checkbox.php');
@@ -63,10 +64,11 @@ public function __construct($fieldnames = null, $baseurl = null, $extraparams =
         }
 
         if (empty($fieldnames)) {
-            $fieldnames = array('realname' => 0, 'lastname' => 1, 'firstname' => 1, 'username' => 1, 'email' => 1, 'city' => 1, 'country' => 1,
-                                'confirmed' => 1, 'suspended' => 1, 'profile' => 1, 'courserole' => 1, 'systemrole' => 1,
-                                'cohort' => 1, 'firstaccess' => 1, 'lastaccess' => 1, 'neveraccessed' => 1, 'timemodified' => 1,
-                                'nevermodified' => 1, 'auth' => 1, 'mnethostid' => 1, 'idnumber' => 1);
+            $fieldnames = array('realname' => 0, 'lastname' => 1, 'firstname' => 1, 'username' => 1, 'email' => 1, 'city' => 1,
+                                'country' => 1, 'confirmed' => 1, 'suspended' => 1, 'profile' => 1, 'courserole' => 1,
+                                'anycourses' => 1, 'systemrole' => 1, 'cohort' => 1, 'firstaccess' => 1, 'lastaccess' => 1,
+                                'neveraccessed' => 1, 'timemodified' => 1, 'nevermodified' => 1, 'auth' => 1, 'mnethostid' => 1,
+                                'idnumber' => 1);
         }
 
         $this->_fields  = array();
@@ -142,6 +144,8 @@ public function get_field($fieldname, $advanced) {
             case 'suspended':   return new user_filter_yesno('suspended', get_string('suspended', 'auth'), $advanced, 'suspended');
             case 'profile':     return new user_filter_profilefield('profile', get_string('profilefields', 'admin'), $advanced);
             case 'courserole':  return new user_filter_courserole('courserole', get_string('courserole', 'filters'), $advanced);
+            case 'anycourses':
+                return new user_filter_anycourses('anycourses', get_string('anycourses', 'filters'), $advanced, 'user_enrolments');
             case 'systemrole':  return new user_filter_globalrole('systemrole', get_string('globalrole', 'role'), $advanced);
             case 'firstaccess': return new user_filter_date('firstaccess', get_string('firstaccess', 'filters'), $advanced, 'firstaccess');
             case 'lastaccess':  return new user_filter_date('lastaccess', get_string('lastaccess'), $advanced, 'lastaccess');