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efrain |
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* tool_generator course backend code.
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*
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* @package tool_generator
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* @copyright 2013 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* Backend code for the 'make large course' tool.
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*
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* @package tool_generator
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* @copyright 2013 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class tool_generator_course_backend extends tool_generator_backend {
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/**
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* @var array Number of sections in course
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*/
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private static $paramsections = array(1, 10, 100, 500, 1000, 2000);
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/**
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* @var array Number of assignments in course
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*/
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private static $paramassignments = array(1, 10, 100, 500, 1000, 2000);
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/**
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* @var array Number of Page activities in course
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*/
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private static $parampages = array(1, 50, 200, 1000, 5000, 10000);
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/**
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* @var array Number of students enrolled in course
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*/
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private static $paramusers = array(1, 100, 1000, 10000, 50000, 100000);
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/**
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* Total size of small files: 1KB, 1MB, 10MB, 100MB, 1GB, 2GB.
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*
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* @var array Number of small files created in a single file activity
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*/
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private static $paramsmallfilecount = array(1, 64, 128, 1024, 16384, 32768);
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/**
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* @var array Size of small files (to make the totals into nice numbers)
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*/
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private static $paramsmallfilesize = array(1024, 16384, 81920, 102400, 65536, 65536);
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/**
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* Total size of big files: 8KB, 8MB, 80MB, 800MB, 8GB, 16GB.
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*
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* @var array Number of big files created as individual file activities
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*/
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private static $parambigfilecount = array(1, 2, 5, 10, 10, 10);
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/**
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* @var array Size of each large file
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*/
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private static $parambigfilesize = array(8192, 4194304, 16777216, 83886080,
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858993459, 1717986918);
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/**
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* @var array Number of forum discussions
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*/
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private static $paramforumdiscussions = array(1, 10, 100, 500, 1000, 2000);
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/**
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* @var array Number of forum posts per discussion
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*/
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private static $paramforumposts = array(2, 2, 5, 10, 10, 10);
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/**
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* @var array Number of assignments in course
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*/
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private static $paramactivities = array(1, 10, 100, 500, 1000, 2000);
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/**
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* @var string Course shortname
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*/
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private $shortname;
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/**
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* @var string Course fullname.
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*/
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private $fullname = "";
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/**
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* @var string Course summary.
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*/
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private $summary = "";
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/**
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* @var string Course summary format, defaults to FORMAT_HTML.
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*/
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private $summaryformat = FORMAT_HTML;
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/**
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* @var testing_data_generator Data generator
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*/
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protected $generator;
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/**
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* @var stdClass Course object
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*/
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private $course;
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/**
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* @var array Array from test user number (1...N) to userid in database
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*/
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private $userids;
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/**
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* @var array $additionalmodules
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*/
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private $additionalmodules;
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/**
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* Constructs object ready to create course.
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*
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* @param string $shortname Course shortname
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* @param int $size Size as numeric index
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* @param bool $fixeddataset To use fixed or random data
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* @param int|bool $filesizelimit The max number of bytes for a generated file
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* @param bool $progress True if progress information should be displayed
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* @param array $additionalmodules potential additional modules to be added (quiz, bigbluebutton...)
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*/
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public function __construct(
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$shortname,
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$size,
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$fixeddataset = false,
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$filesizelimit = false,
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$progress = true,
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$fullname = null,
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$summary = null,
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$summaryformat = FORMAT_HTML,
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$additionalmodules = []
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) {
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// Set parameters.
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$this->shortname = $shortname;
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// We can't allow fullname to be set to an empty string.
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if (empty($fullname)) {
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$this->fullname = get_string(
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'fullname',
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'tool_generator',
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array(
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'size' => get_string('shortsize_' . $size, 'tool_generator')
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)
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);
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} else {
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$this->fullname = $fullname;
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}
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// Summary, on the other hand, should be empty-able.
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if (!is_null($summary)) {
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$this->summary = $summary;
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$this->summaryformat = $summaryformat;
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}
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$this->additionalmodules = $additionalmodules;
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parent::__construct($size, $fixeddataset, $filesizelimit, $progress);
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}
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/**
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* Returns the relation between users and course sizes.
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*
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* @return array
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*/
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public static function get_users_per_size() {
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return self::$paramusers;
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}
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/**
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* Gets a list of size choices supported by this backend.
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*
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* @return array List of size (int) => text description for display
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*/
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public static function get_size_choices() {
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$options = array();
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for ($size = self::MIN_SIZE; $size <= self::MAX_SIZE; $size++) {
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$options[$size] = get_string('coursesize_' . $size, 'tool_generator');
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}
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return $options;
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}
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/**
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* Checks that a shortname is available (unused).
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*
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* @param string $shortname Proposed course shortname
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* @return string An error message if the name is unavailable or '' if OK
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*/
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public static function check_shortname_available($shortname) {
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global $DB;
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$fullname = $DB->get_field('course', 'fullname',
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array('shortname' => $shortname), IGNORE_MISSING);
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if ($fullname !== false) {
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// I wanted to throw an exception here but it is not possible to
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// use strings from moodle.php in exceptions, and I didn't want
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// to duplicate the string in tool_generator, so I changed this to
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// not use exceptions.
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return get_string('shortnametaken', 'moodle', $fullname);
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}
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return '';
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}
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/**
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* Runs the entire 'make' process.
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*
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* @return int Course id
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*/
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public function make() {
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global $DB, $CFG, $USER;
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require_once($CFG->dirroot . '/lib/phpunit/classes/util.php');
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raise_memory_limit(MEMORY_EXTRA);
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if ($this->progress && !CLI_SCRIPT) {
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echo html_writer::start_tag('ul');
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}
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$entirestart = microtime(true);
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// Get generator.
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$this->generator = phpunit_util::get_data_generator();
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// Make course.
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$this->course = $this->create_course();
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$this->create_assignments();
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$this->create_pages();
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$this->create_small_files();
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$this->create_big_files();
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// Create users as late as possible to reduce regarding in the gradebook.
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$this->create_users();
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$this->create_forum();
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// Let plugins hook into user settings navigation.
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$pluginsfunction = get_plugins_with_function('course_backend_generator_create_activity');
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foreach ($pluginsfunction as $plugintype => $plugins) {
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foreach ($plugins as $pluginname => $pluginfunction) {
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if (in_array($pluginname, $this->additionalmodules)) {
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$pluginfunction($this, $this->generator, $this->course->id, self::$paramactivities[$this->size]);
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}
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}
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}
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// We are checking 'enroladminnewcourse' setting to decide to enrol admins or not.
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if (!empty($CFG->creatornewroleid) && !empty($CFG->enroladminnewcourse) && is_siteadmin($USER->id)) {
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// Deal with course creators - enrol them internally with default role.
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enrol_try_internal_enrol($this->course->id, $USER->id, $CFG->creatornewroleid);
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}
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// Log total time.
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$this->log('coursecompleted', round(microtime(true) - $entirestart, 1));
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$this->end_log();
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if ($this->progress && !CLI_SCRIPT) {
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echo html_writer::end_tag('ul');
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}
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return $this->course->id;
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}
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/**
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* Creates the actual course.
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*
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* @return stdClass Course record
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*/
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private function create_course() {
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$this->log('createcourse', $this->shortname);
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$courserecord = array(
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'shortname' => $this->shortname,
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'fullname' => $this->fullname,
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'numsections' => self::$paramsections[$this->size],
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'startdate' => usergetmidnight(time())
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);
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if (strlen($this->summary) > 0) {
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$courserecord['summary'] = $this->summary;
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$courserecord['summary_format'] = $this->summaryformat;
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}
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$return = $this->generator->create_course($courserecord, array('createsections' => true));
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$this->end_log();
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return $return;
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}
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/**
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* Creates a number of user accounts and enrols them on the course.
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* Note: Existing user accounts that were created by this system are
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* reused if available.
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*/
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private function create_users() {
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global $DB;
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// Work out total number of users.
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$count = self::$paramusers[$this->size];
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// Get existing users in order. We will 'fill up holes' in this up to
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// the required number.
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$this->log('checkaccounts', $count);
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$this->end_log();
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$nextnumber = 1;
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$rs = $DB->get_recordset_select('user', $DB->sql_like('username', '?'),
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array('tool_generator_%'), 'username', 'id, username');
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foreach ($rs as $rec) {
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// Extract number from username.
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$matches = array();
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if (!preg_match('~^tool_generator_([0-9]{6})$~', $rec->username, $matches)) {
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continue;
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}
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$number = (int)$matches[1];
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// Create missing users in range up to this.
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if ($number != $nextnumber) {
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$this->create_user_accounts($nextnumber, min($number - 1, $count));
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} else {
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$this->userids[$number] = (int)$rec->id;
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}
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// Stop if we've got enough users.
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$nextnumber = $number + 1;
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if ($number >= $count) {
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break;
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}
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}
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$rs->close();
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// Create users from end of existing range.
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if ($nextnumber <= $count) {
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$this->create_user_accounts($nextnumber, $count);
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}
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// Assign all users to course.
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$this->log('enrol', $count, true);
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$enrolplugin = enrol_get_plugin('manual');
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$instances = enrol_get_instances($this->course->id, true);
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foreach ($instances as $instance) {
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if ($instance->enrol === 'manual') {
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break;
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}
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}
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if ($instance->enrol !== 'manual') {
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throw new coding_exception('No manual enrol plugin in course');
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}
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$role = $DB->get_record('role', array('shortname' => 'student'), '*', MUST_EXIST);
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for ($number = 1; $number <= $count; $number++) {
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// Enrol user.
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$enrolplugin->enrol_user($instance, $this->userids[$number], $role->id);
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$this->dot($number, $count);
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}
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// Sets the pointer at the beginning to be aware of the users we use.
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reset($this->userids);
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$this->end_log();
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}
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/**
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369 |
* Creates user accounts with a numeric range.
|
|
|
370 |
*
|
|
|
371 |
* @param int $first Number of first user
|
|
|
372 |
* @param int $last Number of last user
|
|
|
373 |
*/
|
|
|
374 |
private function create_user_accounts($first, $last) {
|
|
|
375 |
global $CFG;
|
|
|
376 |
|
|
|
377 |
$count = $last - $first + 1;
|
11 |
efrain |
378 |
$this->log('createusers', $count, true);
|
|
|
379 |
|
1 |
efrain |
380 |
$done = 0;
|
|
|
381 |
for ($number = $first; $number <= $last; $number++, $done++) {
|
|
|
382 |
// Work out username with 6-digit number.
|
|
|
383 |
$textnumber = (string)$number;
|
|
|
384 |
while (strlen($textnumber) < 6) {
|
|
|
385 |
$textnumber = '0' . $textnumber;
|
|
|
386 |
}
|
|
|
387 |
$username = 'tool_generator_' . $textnumber;
|
|
|
388 |
|
|
|
389 |
// Create user account.
|
|
|
390 |
$record = array('username' => $username, 'idnumber' => $number);
|
|
|
391 |
|
|
|
392 |
// We add a user password if it has been specified.
|
|
|
393 |
if (!empty($CFG->tool_generator_users_password)) {
|
|
|
394 |
$record['password'] = $CFG->tool_generator_users_password;
|
|
|
395 |
}
|
|
|
396 |
|
|
|
397 |
$user = $this->generator->create_user($record);
|
|
|
398 |
$this->userids[$number] = (int)$user->id;
|
|
|
399 |
$this->dot($done, $count);
|
|
|
400 |
}
|
|
|
401 |
$this->end_log();
|
|
|
402 |
}
|
|
|
403 |
|
|
|
404 |
/**
|
|
|
405 |
* Creates a number of Assignment activities.
|
|
|
406 |
*/
|
|
|
407 |
private function create_assignments() {
|
|
|
408 |
// Set up generator.
|
|
|
409 |
$assigngenerator = $this->generator->get_plugin_generator('mod_assign');
|
|
|
410 |
|
|
|
411 |
// Create assignments.
|
|
|
412 |
$number = self::$paramassignments[$this->size];
|
|
|
413 |
$this->log('createassignments', $number, true);
|
|
|
414 |
for ($i = 0; $i < $number; $i++) {
|
|
|
415 |
$record = array('course' => $this->course);
|
|
|
416 |
$options = array('section' => $this->get_target_section());
|
|
|
417 |
$assigngenerator->create_instance($record, $options);
|
|
|
418 |
$this->dot($i, $number);
|
|
|
419 |
}
|
|
|
420 |
|
|
|
421 |
$this->end_log();
|
|
|
422 |
}
|
|
|
423 |
|
|
|
424 |
/**
|
|
|
425 |
* Creates a number of Page activities.
|
|
|
426 |
*/
|
|
|
427 |
private function create_pages() {
|
|
|
428 |
// Set up generator.
|
|
|
429 |
$pagegenerator = $this->generator->get_plugin_generator('mod_page');
|
|
|
430 |
|
|
|
431 |
// Create pages.
|
|
|
432 |
$number = self::$parampages[$this->size];
|
|
|
433 |
$this->log('createpages', $number, true);
|
|
|
434 |
for ($i = 0; $i < $number; $i++) {
|
|
|
435 |
$record = array('course' => $this->course);
|
|
|
436 |
$options = array('section' => $this->get_target_section());
|
|
|
437 |
$pagegenerator->create_instance($record, $options);
|
|
|
438 |
$this->dot($i, $number);
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
$this->end_log();
|
|
|
442 |
}
|
|
|
443 |
|
|
|
444 |
/**
|
|
|
445 |
* Creates one resource activity with a lot of small files.
|
|
|
446 |
*/
|
|
|
447 |
private function create_small_files() {
|
|
|
448 |
$count = self::$paramsmallfilecount[$this->size];
|
|
|
449 |
$this->log('createsmallfiles', $count, true);
|
|
|
450 |
|
|
|
451 |
// Create resource with default textfile only.
|
|
|
452 |
$resourcegenerator = $this->generator->get_plugin_generator('mod_resource');
|
|
|
453 |
$record = array('course' => $this->course,
|
|
|
454 |
'name' => get_string('smallfiles', 'tool_generator'));
|
|
|
455 |
$options = array('section' => 0);
|
|
|
456 |
$resource = $resourcegenerator->create_instance($record, $options);
|
|
|
457 |
|
|
|
458 |
// Add files.
|
|
|
459 |
$fs = get_file_storage();
|
|
|
460 |
$context = context_module::instance($resource->cmid);
|
|
|
461 |
$filerecord = array('component' => 'mod_resource', 'filearea' => 'content',
|
|
|
462 |
'contextid' => $context->id, 'itemid' => 0, 'filepath' => '/');
|
|
|
463 |
for ($i = 0; $i < $count; $i++) {
|
|
|
464 |
$filerecord['filename'] = 'smallfile' . $i . '.dat';
|
|
|
465 |
|
|
|
466 |
// Generate random binary data (different for each file so it
|
|
|
467 |
// doesn't compress unrealistically).
|
|
|
468 |
$data = random_bytes($this->limit_filesize(self::$paramsmallfilesize[$this->size]));
|
|
|
469 |
|
|
|
470 |
$fs->create_file_from_string($filerecord, $data);
|
|
|
471 |
$this->dot($i, $count);
|
|
|
472 |
}
|
|
|
473 |
|
|
|
474 |
$this->end_log();
|
|
|
475 |
}
|
|
|
476 |
|
|
|
477 |
/**
|
|
|
478 |
* Creates a number of resource activities with one big file each.
|
|
|
479 |
*/
|
|
|
480 |
private function create_big_files() {
|
|
|
481 |
// Work out how many files and how many blocks to use (up to 64KB).
|
|
|
482 |
$count = self::$parambigfilecount[$this->size];
|
|
|
483 |
$filesize = $this->limit_filesize(self::$parambigfilesize[$this->size]);
|
|
|
484 |
$blocks = ceil($filesize / 65536);
|
|
|
485 |
$blocksize = floor($filesize / $blocks);
|
|
|
486 |
|
|
|
487 |
$this->log('createbigfiles', $count, true);
|
|
|
488 |
|
|
|
489 |
// Prepare temp area.
|
|
|
490 |
$tempfolder = make_temp_directory('tool_generator');
|
|
|
491 |
$tempfile = $tempfolder . '/' . rand();
|
|
|
492 |
|
|
|
493 |
// Create resources and files.
|
|
|
494 |
$fs = get_file_storage();
|
|
|
495 |
$resourcegenerator = $this->generator->get_plugin_generator('mod_resource');
|
|
|
496 |
for ($i = 0; $i < $count; $i++) {
|
|
|
497 |
// Create resource.
|
|
|
498 |
$record = array('course' => $this->course,
|
|
|
499 |
'name' => get_string('bigfile', 'tool_generator', $i));
|
|
|
500 |
$options = array('section' => $this->get_target_section());
|
|
|
501 |
$resource = $resourcegenerator->create_instance($record, $options);
|
|
|
502 |
|
|
|
503 |
// Write file.
|
|
|
504 |
$handle = fopen($tempfile, 'w');
|
|
|
505 |
if (!$handle) {
|
|
|
506 |
throw new coding_exception('Failed to open temporary file');
|
|
|
507 |
}
|
|
|
508 |
for ($j = 0; $j < $blocks; $j++) {
|
|
|
509 |
$data = random_bytes($blocksize);
|
|
|
510 |
fwrite($handle, $data);
|
|
|
511 |
$this->dot($i * $blocks + $j, $count * $blocks);
|
|
|
512 |
}
|
|
|
513 |
fclose($handle);
|
|
|
514 |
|
|
|
515 |
// Add file.
|
|
|
516 |
$context = context_module::instance($resource->cmid);
|
|
|
517 |
$filerecord = array('component' => 'mod_resource', 'filearea' => 'content',
|
|
|
518 |
'contextid' => $context->id, 'itemid' => 0, 'filepath' => '/',
|
|
|
519 |
'filename' => 'bigfile' . $i . '.dat');
|
|
|
520 |
$fs->create_file_from_pathname($filerecord, $tempfile);
|
|
|
521 |
}
|
|
|
522 |
|
|
|
523 |
unlink($tempfile);
|
|
|
524 |
$this->end_log();
|
|
|
525 |
}
|
|
|
526 |
|
|
|
527 |
/**
|
|
|
528 |
* Creates one forum activity with a bunch of posts.
|
|
|
529 |
*/
|
|
|
530 |
private function create_forum() {
|
|
|
531 |
global $DB;
|
|
|
532 |
|
|
|
533 |
$discussions = self::$paramforumdiscussions[$this->size];
|
|
|
534 |
$posts = self::$paramforumposts[$this->size];
|
|
|
535 |
$totalposts = $discussions * $posts;
|
|
|
536 |
|
|
|
537 |
$this->log('createforum', $totalposts, true);
|
|
|
538 |
|
|
|
539 |
// Create empty forum.
|
|
|
540 |
$forumgenerator = $this->generator->get_plugin_generator('mod_forum');
|
|
|
541 |
$record = array('course' => $this->course,
|
|
|
542 |
'name' => get_string('pluginname', 'forum'));
|
|
|
543 |
$options = array('section' => 0);
|
|
|
544 |
$forum = $forumgenerator->create_instance($record, $options);
|
|
|
545 |
|
|
|
546 |
// Add discussions and posts.
|
|
|
547 |
$sofar = 0;
|
|
|
548 |
for ($i = 0; $i < $discussions; $i++) {
|
|
|
549 |
$record = array('forum' => $forum->id, 'course' => $this->course->id,
|
|
|
550 |
'userid' => $this->get_target_user());
|
|
|
551 |
$discussion = $forumgenerator->create_discussion($record);
|
|
|
552 |
$parentid = $DB->get_field('forum_posts', 'id', array('discussion' => $discussion->id), MUST_EXIST);
|
|
|
553 |
$sofar++;
|
|
|
554 |
for ($j = 0; $j < $posts - 1; $j++, $sofar++) {
|
|
|
555 |
$record = array('discussion' => $discussion->id,
|
|
|
556 |
'userid' => $this->get_target_user(), 'parent' => $parentid);
|
|
|
557 |
$forumgenerator->create_post($record);
|
|
|
558 |
$this->dot($sofar, $totalposts);
|
|
|
559 |
}
|
|
|
560 |
}
|
|
|
561 |
|
|
|
562 |
$this->end_log();
|
|
|
563 |
}
|
|
|
564 |
|
|
|
565 |
/**
|
|
|
566 |
* Gets a section number.
|
|
|
567 |
*
|
|
|
568 |
* Depends on $this->fixeddataset.
|
|
|
569 |
*
|
|
|
570 |
* @return int A section number from 1 to the number of sections
|
|
|
571 |
*/
|
|
|
572 |
public function get_target_section() {
|
|
|
573 |
|
|
|
574 |
if (!$this->fixeddataset) {
|
|
|
575 |
$key = rand(1, self::$paramsections[$this->size]);
|
|
|
576 |
} else {
|
|
|
577 |
// Using section 1.
|
|
|
578 |
$key = 1;
|
|
|
579 |
}
|
|
|
580 |
|
|
|
581 |
return $key;
|
|
|
582 |
}
|
|
|
583 |
|
|
|
584 |
/**
|
|
|
585 |
* Gets a user id.
|
|
|
586 |
*
|
|
|
587 |
* Depends on $this->fixeddataset.
|
|
|
588 |
*
|
|
|
589 |
* @return int A user id for a random created user
|
|
|
590 |
*/
|
|
|
591 |
private function get_target_user() {
|
|
|
592 |
|
|
|
593 |
if (!$this->fixeddataset) {
|
|
|
594 |
$userid = $this->userids[rand(1, self::$paramusers[$this->size])];
|
|
|
595 |
} else if ($userid = current($this->userids)) {
|
|
|
596 |
// Moving pointer to the next user.
|
|
|
597 |
next($this->userids);
|
|
|
598 |
} else {
|
|
|
599 |
// Returning to the beginning if we reached the end.
|
|
|
600 |
$userid = reset($this->userids);
|
|
|
601 |
}
|
|
|
602 |
|
|
|
603 |
return $userid;
|
|
|
604 |
}
|
|
|
605 |
|
|
|
606 |
/**
|
|
|
607 |
* Restricts the binary file size if necessary
|
|
|
608 |
*
|
|
|
609 |
* @param int $length The total length
|
|
|
610 |
* @return int The limited length if a limit was specified.
|
|
|
611 |
*/
|
|
|
612 |
private function limit_filesize($length) {
|
|
|
613 |
|
|
|
614 |
// Limit to $this->filesizelimit.
|
|
|
615 |
if (is_numeric($this->filesizelimit) && $length > $this->filesizelimit) {
|
|
|
616 |
$length = floor($this->filesizelimit);
|
|
|
617 |
}
|
|
|
618 |
|
|
|
619 |
return $length;
|
|
|
620 |
}
|
|
|
621 |
}
|