MDL-73233 user: Review Start page user preferences

The "Start page" user preferences page has been reviewed to
consider the new $CFG->enabledashboard setting.
The "Dashboard" won't be displayed in the list if it's disabled.
Besides, the default value is now calculated calling the new
get_default_home_page() method.

index.php

@@ -74,6 +74,7 @@ if (get_home_page() != HOMEPAGE_SITE) {
     if (optional_param('setdefaulthome', false, PARAM_BOOL)) {
         set_user_preference('user_home_page_preference', HOMEPAGE_SITE);
     } else if (!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_MY) && $redirect === 1) {
+        // At this point, dashboard is enabled so we don't need to check for it (otherwise, get_home_page() won't return it).
         redirect($CFG->wwwroot .'/my/');
     } else if (!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_MYCOURSES) && $redirect === 1) {
         redirect($CFG->wwwroot .'/my/courses.php');

lib/classes/user.php

@@ -933,6 +933,8 @@ class core_user {
      * @return void
      */
     protected static function fill_preferences_cache() {
+        global $CFG;
+
         if (self::$preferencescache !== null) {
             return;
         }
@@ -966,13 +968,22 @@ class core_user {
                 global $USER;
                 return $USER->id == $user->id && has_capability('moodle/blog:view', context_system::instance());
             });
-        $preferences['user_home_page_preference'] = array('type' => PARAM_INT, 'null' => NULL_ALLOWED, 'default' => HOMEPAGE_MY,
-            'choices' => array(HOMEPAGE_SITE, HOMEPAGE_MY, HOMEPAGE_MYCOURSES),
+
+        $choices = [HOMEPAGE_SITE];
+        if (!empty($CFG->enabledashboard)) {
+            $choices[] = HOMEPAGE_MY;
+        }
+        $choices[] = HOMEPAGE_MYCOURSES;
+        $preferences['user_home_page_preference'] = [
+            'type' => PARAM_INT,
+            'null' => NULL_ALLOWED,
+            'default' => get_default_home_page(),
+            'choices' => $choices,
             'permissioncallback' => function ($user, $preferencename) {
                 global $CFG;
                 return (!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_USER));
             }
-        );
+        ];
 
         // Core components that may want to define their preferences.
         // List of core components implementing callback is hardcoded here for performance reasons.

lib/tests/behat/enabledashboard.feature

@@ -0,0 +1,21 @@
+@core
+Feature: Enable dashboard setting
+  In order to hide/show dashboard in navigation
+  As an administrator
+  I can enable or disable it
+
+  Scenario: Hide setting when dashboard is disabled
+    Given the following config values are set as admin:
+      | enabledashboard | 0 |
+# 2 = User preference.
+      | defaulthomepage | 2 |
+    When I log in as "admin"
+    And I navigate to "Appearance > Navigation" in site administration
+    Then the field "Enable dashboard" matches value "0"
+    And I should not see "Allow guest access to Dashboard"
+    And I should not see "Dashboard" in the "Start page for users" "select"
+    And I follow "Appearance"
+    And I should not see "Default Dashboard page"
+    And I follow "Preferences" in the user menu
+    And I follow "Start page"
+    And I should not see "Dashboard" in the "Start page" "select"

user/classes/form/defaulthomepage_form.php

@@ -42,20 +42,22 @@ class defaulthomepage_form extends \moodleform {
      * Define the form.
      */
     public function definition () {
+        global $CFG;
+
         $mform = $this->_form;
 
         $mform->addElement('hidden', 'id');
         $mform->setType('id', PARAM_INT);
 
-        $options = [
-            HOMEPAGE_SITE => new lang_string('site'),
-            HOMEPAGE_MY => new lang_string('mymoodle', 'admin'),
-            HOMEPAGE_MYCOURSES => new lang_string('mycourses', 'admin'),
-        ];
+        $options = [HOMEPAGE_SITE => new lang_string('home')];
+        if (!empty($CFG->enabledashboard)) {
+            $options[HOMEPAGE_MY] = new lang_string('mymoodle', 'admin');
+        }
+        $options[HOMEPAGE_MYCOURSES] = new lang_string('mycourses', 'admin');
 
         $mform->addElement('select', 'defaulthomepage', get_string('defaulthomepageuser'), $options);
         $mform->addHelpButton('defaulthomepage', 'defaulthomepageuser');
-        $mform->setDefault('defaulthomepage', HOMEPAGE_MY);
+        $mform->setDefault('defaulthomepage', get_default_home_page());
 
         $this->add_action_buttons(true, get_string('savechanges'));
     }

user/defaulthomepage.php

@@ -34,7 +34,12 @@ list($user, $course) = useredit_setup_preference_page($userid, SITEID);
 
 $form = new core_user\form\defaulthomepage_form();
 
-$user->defaulthomepage = get_user_preferences('user_home_page_preference', HOMEPAGE_MY, $user);
+$defaulthomepage = get_default_home_page();
+$user->defaulthomepage = get_user_preferences('user_home_page_preference', $defaulthomepage, $user);
+if (empty($CFG->enabledashboard) && $user->defaulthomepage == HOMEPAGE_MY) {
+    // If the user was using the dashboard but it's disabled, return the default home page.
+    $user->defaulthomepage = $defaulthomepage;
+}
 $form->set_data($user);
 
 $redirect = new moodle_url('/user/preferences.php', ['userid' => $user->id]);

user/tests/behat/set_default_homepage.feature

@@ -71,6 +71,6 @@ Feature: Set the site home page and dashboard as the default home page
 
     Examples:
       | preference | breadcrumb |
-      | Site       | Home       |
+      | Home       | Home       |
       | Dashboard  | Dashboard  |
       | My courses | My courses |