David Mudrak
361 lines
16 KiB
PHP
361 lines
16 KiB
PHP
<?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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* Allows user to allocate the submissions manually
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*
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* @package mod-workshop
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* @copyright 2009 David Mudrak <david.mudrak@gmail.com>
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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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require_once(dirname(dirname(__FILE__)) . '/lib.php'); // interface definition
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require_once(dirname(dirname(dirname(__FILE__))) . '/locallib.php'); // workshop internal API
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/**
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* Allows users to allocate submissions for review manually
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*/
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class workshop_manual_allocator implements workshop_allocator {
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/** constants that are used to pass status messages between init() and ui() */
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const MSG_ADDED = 1;
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const MSG_NOSUBMISSION = 2;
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const MSG_EXISTS = 3;
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const MSG_CONFIRM_DEL = 4;
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const MSG_DELETED = 5;
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const MSG_DELETE_ERROR = 6;
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/** @var workshop instance */
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protected $workshop;
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/**
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* @param workshop $workshop Workshop API object
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*/
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public function __construct(workshop $workshop) {
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$this->workshop = $workshop;
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}
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/**
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* Allocate submissions as requested by user
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*/
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public function init() {
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global $PAGE;
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$mode = optional_param('mode', 'display', PARAM_ALPHA);
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switch ($mode) {
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case 'new':
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if (!confirm_sesskey()) {
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throw new moodle_exception('confirmsesskeybad');
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}
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$reviewerid = required_param('by', PARAM_INT);
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$authorid = required_param('of', PARAM_INT);
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$m = array(); // message object to be passed to the next page
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$submission = $this->workshop->get_submission_by_author($authorid);
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if (!$submission) {
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// nothing submitted by the given user
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$m[] = self::MSG_NOSUBMISSION;
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$m[] = $authorid;
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} else {
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// ok, we have the submission
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$res = $this->workshop->add_allocation($submission, $reviewerid);
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if ($res == workshop::ALLOCATION_EXISTS) {
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$m[] = self::MSG_EXISTS;
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$m[] = $submission->authorid;
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$m[] = $reviewerid;
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} else {
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$m[] = self::MSG_ADDED;
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$m[] = $submission->authorid;
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$m[] = $reviewerid;
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}
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}
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$m = implode('-', $m); // serialize message object to be passed via URL
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redirect($PAGE->url->out(false, array('m' => $m)));
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break;
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case 'del':
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if (!confirm_sesskey()) {
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throw new moodle_exception('confirmsesskeybad');
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}
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$assessmentid = required_param('what', PARAM_INT);
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$confirmed = optional_param('confirm', 0, PARAM_INT);
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$assessment = $this->workshop->get_assessment_by_id($assessmentid);
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if ($assessment) {
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if (!$confirmed) {
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$m[] = self::MSG_CONFIRM_DEL;
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$m[] = $assessment->id;
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$m[] = $assessment->authorid;
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$m[] = $assessment->reviewerid;
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if (is_null($assessment->grade)) {
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$m[] = 0;
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} else {
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$m[] = 1;
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}
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} else {
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if($this->workshop->delete_assessment($assessment->id)) {
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$m[] = self::MSG_DELETED;
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$m[] = $assessment->authorid;
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$m[] = $assessment->reviewerid;
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} else {
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$m[] = self::MSG_DELETE_ERROR;
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$m[] = $assessment->authorid;
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$m[] = $assessment->reviewerid;
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}
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}
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$m = implode('-', $m); // serialize message object to be passed via URL
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redirect($PAGE->url->out(false, array('m' => $m)));
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}
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break;
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}
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}
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/**
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* Prints user interface - current allocation and a form to edit it
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*/
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public function ui() {
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global $PAGE, $OUTPUT, $DB;
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$pagingvar = 'page';
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$page = optional_param($pagingvar, 0, PARAM_INT);
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$perpage = 10; // todo let the user modify this
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$hlauthorid = -1; // highlight this author
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$hlreviewerid = -1; // highlight this reviewer
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$msg = new stdclass(); // message to render
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$m = optional_param('m', '', PARAM_ALPHANUMEXT); // message code
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if ($m) {
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$m = explode('-', $m);
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switch ($m[0]) {
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case self::MSG_ADDED:
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$hlauthorid = $m[1];
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$hlreviewerid = $m[2];
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$msg->text = get_string('allocationadded', 'workshopallocation_manual');
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$msg->sty = 'ok';
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break;
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case self::MSG_EXISTS:
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$hlauthorid = $m[1];
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$hlreviewerid = $m[2];
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$msg->text = get_string('allocationexists', 'workshopallocation_manual');
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$msg->sty = 'info';
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break;
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case self::MSG_NOSUBMISSION:
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$hlauthorid = $m[1];
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$msg->text = get_string('nosubmissionfound', 'workshop');
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$msg->sty = 'error';
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break;
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case self::MSG_CONFIRM_DEL:
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$hlauthorid = $m[2];
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$hlreviewerid = $m[3];
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if ($m[4] == 0) {
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$msg->text = get_string('areyousuretodeallocate', 'workshopallocation_manual');
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$msg->sty = 'info';
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} else {
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$msg->text = get_string('areyousuretodeallocategraded', 'workshopallocation_manual');
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$msg->sty = 'error';
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}
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break;
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case self::MSG_DELETED:
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$hlauthorid = $m[1];
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$hlreviewerid = $m[2];
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$msg->text = get_string('assessmentdeleted', 'workshop');
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$msg->sty = 'ok';
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break;
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case self::MSG_DELETE_ERROR:
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$hlauthorid = $m[1];
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$hlreviewerid = $m[2];
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$msg->text = get_string('assessmentnotdeleted', 'workshop');
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$msg->sty = 'error';
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break;
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}
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if ($m[0] == self::MSG_CONFIRM_DEL) {
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$url = new moodle_url($PAGE->url, array('mode' => 'del', 'what' => $m[1], 'confirm' => 1));
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$msg->extra = $OUTPUT->single_button($url, get_string('iamsure', 'workshop'), 'post');
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}
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}
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// fetch the list of ids of all workshop participants - this may get really long so fetch just id
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$participants = get_users_by_capability($PAGE->context, array('mod/workshop:submit', 'mod/workshop:peerassess'),
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'u.id', 'u.lastname,u.firstname,u.id', '', '', '', '', false, false, true);
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$numofparticipants = count($participants); // we will need later for the pagination
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if ($hlauthorid > 0 and $hlreviewerid > 0) {
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// display just those two users
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$participants = array_intersect_key($participants, array($hlauthorid => null, $hlreviewerid => null));
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} else {
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// slice the list of participants according to the current page
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$participants = array_slice($participants, $page * $perpage, $perpage, true);
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}
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// this will hold the information needed to display user names and pictures
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$userinfo = $DB->get_records_list('user', 'id', array_keys($participants), '', 'id,lastname,firstname,picture,imagealt');
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// load the participants' submissions
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$submissions = $this->workshop->get_submissions(array_keys($participants));
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foreach ($submissions as $submission) {
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if (!isset($userinfo[$submission->authorid])) {
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$userinfo[$submission->authorid] = new stdclass();
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$userinfo[$submission->authorid]->id = $submission->authorid;
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$userinfo[$submission->authorid]->firstname = $submission->authorfirstname;
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$userinfo[$submission->authorid]->lastname = $submission->authorlastname;
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$userinfo[$submission->authorid]->picture = $submission->authorpicture;
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$userinfo[$submission->authorid]->imagealt = $submission->authorimagealt;
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}
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}
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// get current reviewers
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$reviewers = array();
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if ($submissions) {
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list($submissionids, $params) = $DB->get_in_or_equal(array_keys($submissions), SQL_PARAMS_NAMED);
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$sql = "SELECT a.id AS assessmentid, a.submissionid,
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r.id AS reviewerid, r.lastname, r.firstname, r.picture, r.imagealt,
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s.id AS submissionid, s.authorid
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FROM {workshop_assessments} a
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JOIN {user} r ON (a.reviewerid = r.id)
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JOIN {workshop_submissions} s ON (a.submissionid = s.id)
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WHERE a.submissionid $submissionids";
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$reviewers = $DB->get_records_sql($sql, $params);
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foreach ($reviewers as $reviewer) {
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if (!isset($userinfo[$reviewer->reviewerid])) {
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$userinfo[$reviewer->reviewerid] = new stdclass();
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$userinfo[$reviewer->reviewerid]->id = $reviewer->reviewerid;
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$userinfo[$reviewer->reviewerid]->firstname = $reviewer->firstname;
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$userinfo[$reviewer->reviewerid]->lastname = $reviewer->lastname;
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$userinfo[$reviewer->reviewerid]->picture = $reviewer->picture;
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$userinfo[$reviewer->reviewerid]->imagealt = $reviewer->imagealt;
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}
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}
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}
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// get current reviewees
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$reviewees = array();
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if ($participants) {
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list($participantids, $params) = $DB->get_in_or_equal(array_keys($participants), SQL_PARAMS_NAMED);
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$params['workshopid'] = $this->workshop->id;
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$sql = "SELECT a.id AS assessmentid, a.submissionid,
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u.id AS reviewerid,
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s.id AS submissionid,
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e.id AS revieweeid, e.lastname, e.firstname, e.picture, e.imagealt
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FROM {user} u
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JOIN {workshop_assessments} a ON (a.reviewerid = u.id)
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JOIN {workshop_submissions} s ON (a.submissionid = s.id)
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JOIN {user} e ON (s.authorid = e.id)
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WHERE u.id $participantids AND s.workshopid = :workshopid AND s.example = 0";
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$reviewees = $DB->get_records_sql($sql, $params);
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foreach ($reviewees as $reviewee) {
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if (!isset($userinfo[$reviewee->revieweeid])) {
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$userinfo[$reviewee->revieweeid] = new stdclass();
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$userinfo[$reviewee->revieweeid]->id = $reviewee->revieweeid;
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$userinfo[$reviewee->revieweeid]->firstname = $reviewee->firstname;
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$userinfo[$reviewee->revieweeid]->lastname = $reviewee->lastname;
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$userinfo[$reviewee->revieweeid]->picture = $reviewee->picture;
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$userinfo[$reviewee->revieweeid]->imagealt = $reviewee->imagealt;
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}
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}
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}
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// the information about the allocations
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$allocations = array();
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foreach ($participants as $participant) {
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$allocations[$participant->id] = new stdclass;
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$allocations[$participant->id]->userid = $participant->id;
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$allocations[$participant->id]->submissionid = null;
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$allocations[$participant->id]->reviewedby = array();
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$allocations[$participant->id]->reviewerof = array();
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}
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unset($participants);
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foreach ($submissions as $submission) {
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$allocations[$submission->authorid]->submissionid = $submission->id;
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$allocations[$submission->authorid]->submissiontitle = $submission->title;
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$allocations[$submission->authorid]->submissiongrade = $submission->grade;
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}
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unset($submissions);
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foreach($reviewers as $reviewer) {
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$allocations[$reviewer->authorid]->reviewedby[$reviewer->reviewerid] = $reviewer->assessmentid;
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}
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unset($reviewers);
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foreach($reviewees as $reviewee) {
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$allocations[$reviewee->reviewerid]->reviewerof[$reviewee->revieweeid] = $reviewee->assessmentid;
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}
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unset($reviewees);
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// prepare data to be displayed
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$data = new stdclass();
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$data->allocations = $allocations;
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$data->userinfo = $userinfo;
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$data->authors = $this->workshop->get_potential_authors();
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$data->reviewers = $this->workshop->get_potential_reviewers();
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$data->hlauthorid = $hlauthorid;
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$data->hlreviewerid = $hlreviewerid;
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$data->selfassessment = $this->workshop->useselfassessment;
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// prepare paging bar
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$pagingbar = new paging_bar($numofparticipants, $page, $perpage, $PAGE->url, $pagingvar);
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$pagingbarout = $OUTPUT->render($pagingbar);
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// we have all data, let us pass it to the renderers and return the output
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$wsoutput = $PAGE->get_renderer('mod_workshop');
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$uioutput = $PAGE->get_renderer('workshopallocation_manual');
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return $pagingbarout . $wsoutput->status_message($msg) . $uioutput->display_allocations($data) . $pagingbarout;
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}
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/**
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* Returns the list of all allocations where the given users are involved
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*
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* We must use recordset here because we do not have any unique identifier available
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*
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* @param array [userid] => whatever
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* @return moodle_recordset|null
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*/
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protected function get_allocations_recordset(array $users) {
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global $DB, $PAGE;
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if (empty($users)) {
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return null;
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}
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list($authorids, $authorparams) = $DB->get_in_or_equal(array_keys($users), SQL_PARAMS_NAMED, 'a0000');
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list($reviewerids, $reviewerparams) = $DB->get_in_or_equal(array_keys($users), SQL_PARAMS_NAMED, 'r0000');
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$params = array_merge($authorparams, $reviewerparams);
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$params['workshopid'] = $this->workshop->id;
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$sql = "SELECT author.id AS authorid, author.firstname AS authorfirstname, author.lastname AS authorlastname,
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author.picture AS authorpicture, author.imagealt AS authorimagealt,
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s.id AS submissionid, s.title AS submissiontitle, s.grade AS submissiongrade,
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a.id AS assessmentid, a.timecreated AS timeallocated, a.reviewerid,
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reviewer.firstname AS reviewerfirstname, reviewer.lastname AS reviewerlastname,
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reviewer.picture as reviewerpicture, reviewer.imagealt AS reviewerimagealt
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FROM {user} author
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LEFT JOIN {workshop_submissions} s ON (s.authorid = author.id)
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LEFT JOIN {workshop_assessments} a ON (s.id = a.submissionid)
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LEFT JOIN {user} reviewer ON (a.reviewerid = reviewer.id)
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WHERE (author.id $authorids OR reviewer.id $reviewerids) AND (s.id IS NULL OR s.workshopid = :workshopid)
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ORDER BY author.lastname,author.firstname,author.id,reviewer.lastname,reviewer.firstname,reviewer.id";
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return $DB->get_recordset_sql($sql, $params);
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}
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}
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