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Long Term Support Release
<?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/>. /** * tool_generator course backend code. * * @package tool_generator * @copyright 2013 The Open University * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); /** * Backend code for the 'make large course' tool. * * @package tool_generator * @copyright 2013 The Open University * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class tool_generator_course_backend extends tool_generator_backend { /** * @var array Number of sections in course */ private static $paramsections = array(1, 10, 100, 500, 1000, 2000); /** * @var array Number of assignments in course */ private static $paramassignments = array(1, 10, 100, 500, 1000, 2000); /** * @var array Number of Page activities in course */ private static $parampages = array(1, 50, 200, 1000, 5000, 10000); /** * @var array Number of students enrolled in course */ private static $paramusers = array(1, 100, 1000, 10000, 50000, 100000); /** * Total size of small files: 1KB, 1MB, 10MB, 100MB, 1GB, 2GB. * * @var array Number of small files created in a single file activity */ private static $paramsmallfilecount = array(1, 64, 128, 1024, 16384, 32768); /** * @var array Size of small files (to make the totals into nice numbers) */ private static $paramsmallfilesize = array(1024, 16384, 81920, 102400, 65536, 65536); /** * Total size of big files: 8KB, 8MB, 80MB, 800MB, 8GB, 16GB. * * @var array Number of big files created as individual file activities */ private static $parambigfilecount = array(1, 2, 5, 10, 10, 10); /** * @var array Size of each large file */ private static $parambigfilesize = array(8192, 4194304, 16777216, 83886080, 858993459, 1717986918); /** * @var array Number of forum discussions */ private static $paramforumdiscussions = array(1, 10, 100, 500, 1000, 2000); /** * @var array Number of forum posts per discussion */ private static $paramforumposts = array(2, 2, 5, 10, 10, 10); /**> * @var array Number of assignments in course * @var string Course shortname > */ */ > private static $paramactivities = array(1, 10, 100, 500, 1000, 2000); private $shortname; > /**/** * @var string Course fullname. */ private $fullname = ""; /** * @var string Course summary. */ private $summary = ""; /** * @var string Course summary format, defaults to FORMAT_HTML. */ private $summaryformat = FORMAT_HTML; /** * @var testing_data_generator Data generator */ protected $generator; /** * @var stdClass Course object */ private $course; /** * @var array Array from test user number (1...N) to userid in database */ private $userids; /**> * @var array $additionalmodules * Constructs object ready to create course. > */ * > private $additionalmodules; * @param string $shortname Course shortname > /*** @param int $size Size as numeric index * @param bool $fixeddataset To use fixed or random data * @param int|bool $filesizelimit The max number of bytes for a generated file * @param bool $progress True if progress information should be displayed> * @param array $additionalmodules potential additional modules to be added (quiz, bigbluebutton...)*/ public function __construct( $shortname, $size, $fixeddataset = false, $filesizelimit = false, $progress = true, $fullname = null, $summary = null,< $summaryformat = FORMAT_HTML) {> $summaryformat = FORMAT_HTML, > $additionalmodules = [] > ) {// Set parameters. $this->shortname = $shortname; // We can't allow fullname to be set to an empty string. if (empty($fullname)) { $this->fullname = get_string( 'fullname', 'tool_generator', array( 'size' => get_string('shortsize_' . $size, 'tool_generator') ) ); } else { $this->fullname = $fullname; } // Summary, on the other hand, should be empty-able. if (!is_null($summary)) { $this->summary = $summary; $this->summaryformat = $summaryformat; }<> $this->additionalmodules = $additionalmodules;parent::__construct($size, $fixeddataset, $filesizelimit, $progress); } /** * Returns the relation between users and course sizes. * * @return array */ public static function get_users_per_size() { return self::$paramusers; } /** * Gets a list of size choices supported by this backend. * * @return array List of size (int) => text description for display */ public static function get_size_choices() { $options = array(); for ($size = self::MIN_SIZE; $size <= self::MAX_SIZE; $size++) { $options[$size] = get_string('coursesize_' . $size, 'tool_generator'); } return $options; } /** * Checks that a shortname is available (unused). * * @param string $shortname Proposed course shortname * @return string An error message if the name is unavailable or '' if OK */ public static function check_shortname_available($shortname) { global $DB; $fullname = $DB->get_field('course', 'fullname', array('shortname' => $shortname), IGNORE_MISSING); if ($fullname !== false) { // I wanted to throw an exception here but it is not possible to // use strings from moodle.php in exceptions, and I didn't want // to duplicate the string in tool_generator, so I changed this to // not use exceptions. return get_string('shortnametaken', 'moodle', $fullname); } return ''; } /** * Runs the entire 'make' process. * * @return int Course id */ public function make() { global $DB, $CFG, $USER; require_once($CFG->dirroot . '/lib/phpunit/classes/util.php'); raise_memory_limit(MEMORY_EXTRA); if ($this->progress && !CLI_SCRIPT) { echo html_writer::start_tag('ul'); } $entirestart = microtime(true); // Get generator. $this->generator = phpunit_util::get_data_generator(); // Make course. $this->course = $this->create_course(); $this->create_assignments(); $this->create_pages(); $this->create_small_files(); $this->create_big_files(); // Create users as late as possible to reduce regarding in the gradebook. $this->create_users(); $this->create_forum();> // Let plugins hook into user settings navigation. // We are checking 'enroladminnewcourse' setting to decide to enrol admins or not. > $pluginsfunction = get_plugins_with_function('course_backend_generator_create_activity'); if (!empty($CFG->creatornewroleid) && !empty($CFG->enroladminnewcourse) && is_siteadmin($USER->id)) { > foreach ($pluginsfunction as $plugintype => $plugins) { // Deal with course creators - enrol them internally with default role. > foreach ($plugins as $pluginname => $pluginfunction) { enrol_try_internal_enrol($this->course->id, $USER->id, $CFG->creatornewroleid); > if (in_array($pluginname, $this->additionalmodules)) { } > $pluginfunction($this, $this->generator, $this->course->id, self::$paramactivities[$this->size]); > } // Log total time. > } $this->log('coursecompleted', round(microtime(true) - $entirestart, 1)); > } >if ($this->progress && !CLI_SCRIPT) { echo html_writer::end_tag('ul'); } return $this->course->id; } /** * Creates the actual course. * * @return stdClass Course record */ private function create_course() { $this->log('createcourse', $this->shortname); $courserecord = array( 'shortname' => $this->shortname, 'fullname' => $this->fullname, 'numsections' => self::$paramsections[$this->size], 'startdate' => usergetmidnight(time()) ); if (strlen($this->summary) > 0) { $courserecord['summary'] = $this->summary; $courserecord['summary_format'] = $this->summaryformat; } return $this->generator->create_course($courserecord, array('createsections' => true)); } /** * Creates a number of user accounts and enrols them on the course. * Note: Existing user accounts that were created by this system are * reused if available. */ private function create_users() { global $DB; // Work out total number of users. $count = self::$paramusers[$this->size]; // Get existing users in order. We will 'fill up holes' in this up to // the required number. $this->log('checkaccounts', $count); $nextnumber = 1; $rs = $DB->get_recordset_select('user', $DB->sql_like('username', '?'), array('tool_generator_%'), 'username', 'id, username'); foreach ($rs as $rec) { // Extract number from username. $matches = array(); if (!preg_match('~^tool_generator_([0-9]{6})$~', $rec->username, $matches)) { continue; } $number = (int)$matches[1]; // Create missing users in range up to this. if ($number != $nextnumber) { $this->create_user_accounts($nextnumber, min($number - 1, $count)); } else { $this->userids[$number] = (int)$rec->id; } // Stop if we've got enough users. $nextnumber = $number + 1; if ($number >= $count) { break; } } $rs->close(); // Create users from end of existing range. if ($nextnumber <= $count) { $this->create_user_accounts($nextnumber, $count); } // Assign all users to course. $this->log('enrol', $count, true); $enrolplugin = enrol_get_plugin('manual'); $instances = enrol_get_instances($this->course->id, true); foreach ($instances as $instance) { if ($instance->enrol === 'manual') { break; } } if ($instance->enrol !== 'manual') { throw new coding_exception('No manual enrol plugin in course'); } $role = $DB->get_record('role', array('shortname' => 'student'), '*', MUST_EXIST); for ($number = 1; $number <= $count; $number++) { // Enrol user. $enrolplugin->enrol_user($instance, $this->userids[$number], $role->id); $this->dot($number, $count); } // Sets the pointer at the beginning to be aware of the users we use. reset($this->userids); $this->end_log(); } /** * Creates user accounts with a numeric range. * * @param int $first Number of first user * @param int $last Number of last user */ private function create_user_accounts($first, $last) { global $CFG; $this->log('createaccounts', (object)array('from' => $first, 'to' => $last), true); $count = $last - $first + 1; $done = 0; for ($number = $first; $number <= $last; $number++, $done++) { // Work out username with 6-digit number. $textnumber = (string)$number; while (strlen($textnumber) < 6) { $textnumber = '0' . $textnumber; } $username = 'tool_generator_' . $textnumber; // Create user account. $record = array('username' => $username, 'idnumber' => $number); // We add a user password if it has been specified. if (!empty($CFG->tool_generator_users_password)) { $record['password'] = $CFG->tool_generator_users_password; } $user = $this->generator->create_user($record); $this->userids[$number] = (int)$user->id; $this->dot($done, $count); } $this->end_log(); } /** * Creates a number of Assignment activities. */ private function create_assignments() { // Set up generator. $assigngenerator = $this->generator->get_plugin_generator('mod_assign'); // Create assignments. $number = self::$paramassignments[$this->size]; $this->log('createassignments', $number, true); for ($i = 0; $i < $number; $i++) { $record = array('course' => $this->course); $options = array('section' => $this->get_target_section()); $assigngenerator->create_instance($record, $options); $this->dot($i, $number); } $this->end_log(); } /** * Creates a number of Page activities. */ private function create_pages() { // Set up generator. $pagegenerator = $this->generator->get_plugin_generator('mod_page'); // Create pages. $number = self::$parampages[$this->size]; $this->log('createpages', $number, true); for ($i = 0; $i < $number; $i++) { $record = array('course' => $this->course); $options = array('section' => $this->get_target_section()); $pagegenerator->create_instance($record, $options); $this->dot($i, $number); } $this->end_log(); } /** * Creates one resource activity with a lot of small files. */ private function create_small_files() { $count = self::$paramsmallfilecount[$this->size]; $this->log('createsmallfiles', $count, true); // Create resource with default textfile only. $resourcegenerator = $this->generator->get_plugin_generator('mod_resource'); $record = array('course' => $this->course, 'name' => get_string('smallfiles', 'tool_generator')); $options = array('section' => 0); $resource = $resourcegenerator->create_instance($record, $options); // Add files. $fs = get_file_storage(); $context = context_module::instance($resource->cmid); $filerecord = array('component' => 'mod_resource', 'filearea' => 'content', 'contextid' => $context->id, 'itemid' => 0, 'filepath' => '/'); for ($i = 0; $i < $count; $i++) { $filerecord['filename'] = 'smallfile' . $i . '.dat'; // Generate random binary data (different for each file so it // doesn't compress unrealistically).< $data = random_bytes_emulate($this->limit_filesize(self::$paramsmallfilesize[$this->size]));> $data = random_bytes($this->limit_filesize(self::$paramsmallfilesize[$this->size]));$fs->create_file_from_string($filerecord, $data); $this->dot($i, $count); } $this->end_log(); } /** * Creates a number of resource activities with one big file each. */ private function create_big_files() { // Work out how many files and how many blocks to use (up to 64KB). $count = self::$parambigfilecount[$this->size]; $filesize = $this->limit_filesize(self::$parambigfilesize[$this->size]); $blocks = ceil($filesize / 65536); $blocksize = floor($filesize / $blocks); $this->log('createbigfiles', $count, true); // Prepare temp area. $tempfolder = make_temp_directory('tool_generator'); $tempfile = $tempfolder . '/' . rand(); // Create resources and files. $fs = get_file_storage(); $resourcegenerator = $this->generator->get_plugin_generator('mod_resource'); for ($i = 0; $i < $count; $i++) { // Create resource. $record = array('course' => $this->course, 'name' => get_string('bigfile', 'tool_generator', $i)); $options = array('section' => $this->get_target_section()); $resource = $resourcegenerator->create_instance($record, $options); // Write file. $handle = fopen($tempfile, 'w'); if (!$handle) { throw new coding_exception('Failed to open temporary file'); } for ($j = 0; $j < $blocks; $j++) {< $data = random_bytes_emulate($blocksize);> $data = random_bytes($blocksize);fwrite($handle, $data); $this->dot($i * $blocks + $j, $count * $blocks); } fclose($handle); // Add file. $context = context_module::instance($resource->cmid); $filerecord = array('component' => 'mod_resource', 'filearea' => 'content', 'contextid' => $context->id, 'itemid' => 0, 'filepath' => '/', 'filename' => 'bigfile' . $i . '.dat'); $fs->create_file_from_pathname($filerecord, $tempfile); } unlink($tempfile); $this->end_log(); } /** * Creates one forum activity with a bunch of posts. */ private function create_forum() { global $DB; $discussions = self::$paramforumdiscussions[$this->size]; $posts = self::$paramforumposts[$this->size]; $totalposts = $discussions * $posts; $this->log('createforum', $totalposts, true); // Create empty forum. $forumgenerator = $this->generator->get_plugin_generator('mod_forum'); $record = array('course' => $this->course, 'name' => get_string('pluginname', 'forum')); $options = array('section' => 0); $forum = $forumgenerator->create_instance($record, $options); // Add discussions and posts. $sofar = 0; for ($i = 0; $i < $discussions; $i++) { $record = array('forum' => $forum->id, 'course' => $this->course->id, 'userid' => $this->get_target_user()); $discussion = $forumgenerator->create_discussion($record); $parentid = $DB->get_field('forum_posts', 'id', array('discussion' => $discussion->id), MUST_EXIST); $sofar++; for ($j = 0; $j < $posts - 1; $j++, $sofar++) { $record = array('discussion' => $discussion->id, 'userid' => $this->get_target_user(), 'parent' => $parentid); $forumgenerator->create_post($record); $this->dot($sofar, $totalposts); } } $this->end_log(); } /** * Gets a section number. * * Depends on $this->fixeddataset. * * @return int A section number from 1 to the number of sections */< private function get_target_section() {> public function get_target_section() {if (!$this->fixeddataset) { $key = rand(1, self::$paramsections[$this->size]); } else { // Using section 1. $key = 1; } return $key; } /** * Gets a user id. * * Depends on $this->fixeddataset. * * @return int A user id for a random created user */ private function get_target_user() { if (!$this->fixeddataset) { $userid = $this->userids[rand(1, self::$paramusers[$this->size])]; } else if ($userid = current($this->userids)) { // Moving pointer to the next user. next($this->userids); } else { // Returning to the beginning if we reached the end. $userid = reset($this->userids); } return $userid; } /** * Restricts the binary file size if necessary * * @param int $length The total length * @return int The limited length if a limit was specified. */ private function limit_filesize($length) { // Limit to $this->filesizelimit. if (is_numeric($this->filesizelimit) && $length > $this->filesizelimit) { $length = floor($this->filesizelimit); } return $length; }<}