first commit

mod/folder/classes/analytics/indicator/activity_base.php

@@ -0,0 +1,46 @@
+<?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/>.
+
+/**
+ * Activity base class.
+ *
+ * @package   mod_folder
+ * @copyright 2017 onwards Ankit Agarwal <ankit.agrr@gmail.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Activity base class.
+ *
+ * @package   mod_folder
+ * @copyright 2017 onwards Ankit Agarwal <ankit.agrr@gmail.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+abstract class activity_base extends \core_analytics\local\indicator\community_of_inquiry_activity {
+
+    /**
+     * No need to fetch grades for resources.
+     *
+     * @param \core_analytics\course $course
+     * @return void
+     */
+    public function fetch_student_grades(\core_analytics\course $course) {
+    }
+}

mod/folder/classes/analytics/indicator/cognitive_depth.php

@@ -0,0 +1,56 @@
+<?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/>.
+
+/**
+ * Cognitive depth indicator - folder.
+ *
+ * @package   mod_folder
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Cognitive depth indicator - folder.
+ *
+ * @package   mod_folder
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class cognitive_depth extends activity_base {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:cognitivedepth', 'mod_folder');
+    }
+
+    public function get_indicator_type() {
+        return self::INDICATOR_COGNITIVE;
+    }
+
+    public function get_cognitive_depth_level(\cm_info $cm) {
+        return self::COGNITIVE_LEVEL_1;
+    }
+}

mod/folder/classes/analytics/indicator/social_breadth.php

@@ -0,0 +1,56 @@
+<?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/>.
+
+/**
+ * Social breadth indicator - folder.
+ *
+ * @package   mod_folder
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Social breadth indicator - folder.
+ *
+ * @package   mod_folder
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class social_breadth extends activity_base {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:socialbreadth', 'mod_folder');
+    }
+
+    public function get_indicator_type() {
+        return self::INDICATOR_SOCIAL;
+    }
+
+    public function get_social_breadth_level(\cm_info $cm) {
+        return self::SOCIAL_LEVEL_1;
+    }
+}

mod/folder/classes/completion/custom_completion.php

@@ -0,0 +1,84 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace mod_folder\completion;
+
+use core_completion\activity_custom_completion;
+
+/**
+ * Activity custom completion subclass for the folder resource.
+ *
+ * Class for defining mod_folder's custom completion rules.
+ *
+ * @package    mod_folder
+ * @copyright  2022 David Woloszyn <david.woloszyn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class custom_completion extends activity_custom_completion {
+
+    /**
+     * Fetches the completion state for a given completion rule.
+     *
+     * @param string $rule The completion rule.
+     * @return int The completion state.
+     */
+    public function get_state(string $rule): int {
+        return COMPLETION_UNKNOWN;
+    }
+
+    /**
+     * Fetch the list of custom completion rules that this module defines.
+     *
+     * @return array
+     */
+    public static function get_defined_custom_rules(): array {
+        // This activity/resource does not have any custom rules.
+        return [];
+    }
+
+    /**
+     * Returns an associative array of the descriptions of custom completion rules.
+     *
+     * @return array
+     */
+    public function get_custom_rule_descriptions(): array {
+        // This activity/resource does not have any custom rule descriptions.
+        return [];
+    }
+
+    /**
+     * Show the manual completion button depending on the display option set.
+     *
+     * @return bool
+     */
+    public function manual_completion_always_shown(): bool {
+        $display = $this->cm->customdata->display ?? null;
+
+        return ($display == FOLDER_DISPLAY_INLINE ?? false);
+    }
+
+    /**
+     * Returns an array of all completion rules, in the order they should be displayed to users.
+     *
+     * @return array
+     */
+    public function get_sort_order(): array {
+        // This module only supports manual completion.
+        return [];
+    }
+}

mod/folder/classes/content/exporter.php

@@ -0,0 +1,61 @@
+<?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/>.
+
+/**
+ * Content export definition.
+ *
+ * @package     mod_folder
+ * @copyright   2020 Andrew Nicols <andrew@nicols.co.uk>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace mod_folder\content;
+
+use core\content\export\exportable_items\exportable_filearea;
+use core\content\export\exporters\abstract_mod_exporter;
+
+/**
+ * A class which assists a component to export content.
+ *
+ * @copyright   2020 Andrew Nicols <andrew@nicols.co.uk>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class exporter extends abstract_mod_exporter {
+
+    /**
+     * Get the exportable items for mod_folder.
+     *
+     * @param   bool $includeuserdata Whether to include user data, in addition to shared content.
+     * @return  \core\content\export\exportable_item[]
+     */
+    public function get_exportables(bool $includeuserdata = false): array {
+        $contentitems = [];
+
+        $contentitems[]  = new exportable_filearea(
+            $this->get_context(),
+            $this->get_component(),
+            get_string('foldercontent', 'mod_folder'),
+
+            // The files held in mod_folder are stored in the 'content' filearea, under itemid 0.
+            'content',
+            0,
+
+            // The itemid is used in the URL when accessing.
+            0
+        );
+
+        return $contentitems;
+    }
+}

mod/folder/classes/event/all_files_downloaded.php

@@ -0,0 +1,95 @@
+<?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/>.
+
+/**
+ * The mod_folder course module downloaded event.
+ *
+ * @package   mod_folder
+ * @copyright 2015 Andrew Hancox <andrewdchancox@googlemail.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_folder course module viewed event class.
+ *
+ * @package    mod_folder
+ * @since      Moodle 3.1
+ * @copyright  2015 Andrew Hancox <andrewdchancox@googlemail.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class all_files_downloaded extends \core\event\base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['crud'] = 'r';
+        $this->data['edulevel'] = self::LEVEL_PARTICIPATING;
+        $this->data['objecttable'] = 'folder';
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        return "The user with id '$this->userid' downloaded a zip archive containing all the files from the folder activity with " .
+        "course module id '$this->contextinstanceid'.";
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventallfilesdownloaded', 'folder');
+    }
+
+    /**
+     * Get URL related to the action.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        return new \moodle_url("/mod/folder/view.php", array('id' => $this->contextinstanceid));
+    }
+
+    /**
+     * Custom validation.
+     *
+     * @throws \coding_exception
+     * @return void
+     */
+    protected function validate_data() {
+        parent::validate_data();
+        // Make sure this class is never used without proper object details.
+        if (empty($this->objectid) || empty($this->objecttable)) {
+            throw new \coding_exception('The course_module_viewed event must define objectid and object table.');
+        }
+        // Make sure the context level is set to module.
+        if ($this->contextlevel != CONTEXT_MODULE) {
+            throw new \coding_exception('Context level must be CONTEXT_MODULE.');
+        }
+    }
+}

mod/folder/classes/event/course_module_instance_list_viewed.php

@@ -0,0 +1,39 @@
+<?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/>.
+
+/**
+ * The mod_folder instance list viewed event.
+ *
+ * @package    mod_folder
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_folder instance list viewed event class.
+ *
+ * @package    mod_folder
+ * @since      Moodle 2.7
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class course_module_instance_list_viewed extends \core\event\course_module_instance_list_viewed {
+    // No code required here as the parent class handles it all.
+}

mod/folder/classes/event/course_module_viewed.php

@@ -0,0 +1,51 @@
+<?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/>.
+
+/**
+ * The mod_folder course module viewed event.
+ *
+ * @package    mod_folder
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_folder course module viewed event class.
+ *
+ * @package    mod_folder
+ * @since      Moodle 2.7
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class course_module_viewed extends \core\event\course_module_viewed {
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'r';
+        $this->data['edulevel'] = self::LEVEL_PARTICIPATING;
+        $this->data['objecttable'] = 'folder';
+    }
+
+    public static function get_objectid_mapping() {
+        return array('db' => 'folder', 'restore' => 'folder');
+    }
+}

mod/folder/classes/event/folder_updated.php

@@ -0,0 +1,78 @@
+<?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/>.
+
+/**
+ * The mod_folder folder updated event.
+ *
+ * @package    mod_folder
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_folder folder updated event class.
+ *
+ * @package    mod_folder
+ * @since      Moodle 2.7
+ * @copyright  2013 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class folder_updated extends \core\event\base {
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'u';
+        $this->data['edulevel'] = self::LEVEL_TEACHING;
+        $this->data['objecttable'] = 'folder';
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventfolderupdated', 'mod_folder');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        return "The user with id '$this->userid' updated the folder activity with course module id '$this->contextinstanceid'.";
+    }
+
+    /**
+     * Get url related to the action.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        return new \moodle_url('/mod/folder/edit.php', array('id' => $this->contextinstanceid));
+    }
+
+    public static function get_objectid_mapping() {
+        return array('db' => 'folder', 'restore' => 'folder');
+    }
+}

mod/folder/classes/external.php

@@ -0,0 +1,189 @@
+<?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/>.
+
+use core_course\external\helper_for_get_mods_by_courses;
+use core_external\external_api;
+use core_external\external_function_parameters;
+use core_external\external_multiple_structure;
+use core_external\external_single_structure;
+use core_external\external_value;
+use core_external\external_warnings;
+use core_external\util;
+
+/**
+ * folder external functions
+ *
+ * @package    mod_folder
+ * @category   external
+ * @copyright  2015 Juan Leyva <juan@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @since      Moodle 3.0
+ */
+class mod_folder_external extends external_api {
+
+    /**
+     * Returns description of method parameters
+     *
+     * @return external_function_parameters
+     * @since Moodle 3.0
+     */
+    public static function view_folder_parameters() {
+        return new external_function_parameters(
+            array(
+                'folderid' => new external_value(PARAM_INT, 'folder instance id')
+            )
+        );
+    }
+
+    /**
+     * Simulate the folder/view.php web interface page: trigger events, completion, etc...
+     *
+     * @param int $folderid the folder instance id
+     * @return array of warnings and status result
+     * @since Moodle 3.0
+     * @throws moodle_exception
+     */
+    public static function view_folder($folderid) {
+        global $DB, $CFG;
+        require_once($CFG->dirroot . "/mod/folder/lib.php");
+
+        $params = self::validate_parameters(self::view_folder_parameters(),
+                                            array(
+                                                'folderid' => $folderid
+                                            ));
+        $warnings = array();
+
+        // Request and permission validation.
+        $folder = $DB->get_record('folder', array('id' => $params['folderid']), '*', MUST_EXIST);
+        list($course, $cm) = get_course_and_cm_from_instance($folder, 'folder');
+
+        $context = context_module::instance($cm->id);
+        self::validate_context($context);
+
+        require_capability('mod/folder:view', $context);
+
+        // Call the page/lib API.
+        folder_view($folder, $course, $cm, $context);
+
+        $result = array();
+        $result['status'] = true;
+        $result['warnings'] = $warnings;
+        return $result;
+    }
+
+    /**
+     * Returns description of method result value
+     *
+     * @return \core_external\external_description
+     * @since Moodle 3.0
+     */
+    public static function view_folder_returns() {
+        return new external_single_structure(
+            array(
+                'status' => new external_value(PARAM_BOOL, 'status: true if success'),
+                'warnings' => new external_warnings()
+            )
+        );
+    }
+
+    /**
+     * Describes the parameters for get_folders_by_courses.
+     *
+     * @return external_function_parameters
+     * @since Moodle 3.3
+     */
+    public static function get_folders_by_courses_parameters() {
+        return new external_function_parameters (
+            array(
+                'courseids' => new external_multiple_structure(
+                    new external_value(PARAM_INT, 'Course id'), 'Array of course ids', VALUE_DEFAULT, array()
+                ),
+            )
+        );
+    }
+
+    /**
+     * Returns a list of folders in a provided list of courses.
+     * If no list is provided all folders that the user can view will be returned.
+     *
+     * @param array $courseids course ids
+     * @return array of warnings and folders
+     * @since Moodle 3.3
+     */
+    public static function get_folders_by_courses($courseids = array()) {
+
+        $warnings = array();
+        $returnedfolders = array();
+
+        $params = array(
+            'courseids' => $courseids,
+        );
+        $params = self::validate_parameters(self::get_folders_by_courses_parameters(), $params);
+
+        $mycourses = array();
+        if (empty($params['courseids'])) {
+            $mycourses = enrol_get_my_courses();
+            $params['courseids'] = array_keys($mycourses);
+        }
+
+        // Ensure there are courseids to loop through.
+        if (!empty($params['courseids'])) {
+
+            list($courses, $warnings) = util::validate_courses($params['courseids'], $mycourses);
+
+            // Get the folders in this course, this function checks users visibility permissions.
+            // We can avoid then additional validate_context calls.
+            $folders = get_all_instances_in_courses("folder", $courses);
+            foreach ($folders as $folder) {
+                helper_for_get_mods_by_courses::format_name_and_intro($folder, 'mod_folder');
+                $returnedfolders[] = $folder;
+            }
+        }
+
+        $result = array(
+            'folders' => $returnedfolders,
+            'warnings' => $warnings
+        );
+        return $result;
+    }
+
+    /**
+     * Describes the get_folders_by_courses return value.
+     *
+     * @return external_single_structure
+     * @since Moodle 3.3
+     */
+    public static function get_folders_by_courses_returns() {
+        return new external_single_structure(
+            array(
+                'folders' => new external_multiple_structure(
+                    new external_single_structure(array_merge(
+                        helper_for_get_mods_by_courses::standard_coursemodule_elements_returns(),
+                        [
+                            'revision' => new external_value(PARAM_INT, 'Incremented when after each file changes, to avoid cache'),
+                            'timemodified' => new external_value(PARAM_INT, 'Last time the folder was modified'),
+                            'display' => new external_value(PARAM_INT, 'Display type of folder contents on a separate page or inline'),
+                            'showexpanded' => new external_value(PARAM_INT, '1 = expanded, 0 = collapsed for sub-folders'),
+                            'showdownloadfolder' => new external_value(PARAM_INT, 'Whether to show the download folder button'),
+                            'forcedownload' => new external_value(PARAM_INT, 'Whether file download is forced'),
+                        ]
+                    ))
+                ),
+                'warnings' => new external_warnings(),
+            )
+        );
+    }
+}

mod/folder/classes/privacy/provider.php

@@ -0,0 +1,44 @@
+<?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/>.
+
+/**
+ * Privacy Subsystem implementation for mod_folder.
+ *
+ * @package    mod_folder
+ * @copyright  2018 Zig Tan <zig@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace mod_folder\privacy;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_folder module does not store any data.
+ *
+ * @copyright  2018 Zig Tan <zig@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class provider implements \core_privacy\local\metadata\null_provider {
+    /**
+     * Get the language string identifier with the component's language
+     * file to explain why this plugin stores no data.
+     *
+     * @return  string
+     */
+    public static function get_reason(): string {
+        return 'privacy:metadata';
+    }
+}

mod/folder/classes/search/activity.php

@@ -0,0 +1,58 @@
+<?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/>.
+
+/**
+ * Search area for mod_folder activities.
+ *
+ * @package    mod_folder
+ * @copyright  2015 David Monllao {@link http://www.davidmonllao.com}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_folder\search;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Search area for mod_folder activities.
+ *
+ * @package    mod_folder
+ * @copyright  2015 David Monllao {@link http://www.davidmonllao.com}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class activity extends \core_search\base_activity {
+
+    /**
+     * Returns true if this area uses file indexing.
+     *
+     * @return bool
+     */
+    public function uses_file_indexing() {
+        return true;
+    }
+
+    /**
+     * Return the context info required to index files for
+     * this search area.
+     *
+     * @return array
+     */
+    public function get_search_fileareas() {
+        $fileareas = array('intro', 'content'); // Fileareas.
+
+        return $fileareas;
+    }
+}