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renderer.php
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renderer.php
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<?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/>.
/**
*
* @package qtype_lti
* @author Amr Hourani amr.hourani@id.ethz.ch
* @copyright ETHz 2018 amr.hourani@id.ethz.ch
*/
defined('MOODLE_INTERNAL') || die;
require_once($CFG->dirroot . '/question/type/rendererbase.php');
class qtype_lti_renderer extends \qtype_renderer {
/**
* Returns the last response in a question attempt.
* @param question_attempt $qa
* @return array|mixed
*/
protected function qtype_lti_generate_usage_record($ltiid, $instancecode, $userid, $username, $attempt, $questionid, $quizid,
$courseid, $toolurl, $currentanswer, $currentlinkid, $previousresponse) {
global $CFG, $DB;
$checkrecord = $DB->get_record('qtype_lti_usage',
array('mattemptid' => $attempt, 'instancecode' => $instancecode,
'userid' => $userid, 'questionid' => $questionid,
'courseid' => $courseid, 'quizid' => $quizid,
'ltiid' => $ltiid
));
if($checkrecord) {
return $checkrecord;
} else {
// Check if it was restored.
$params = array('mattemptid' => -1, 'instancecode' => $instancecode,
'userid' => $userid, 'questionid' => $questionid,
'courseid' => $courseid, 'quizid' => 0,
'ltiid' => $ltiid);
$where_clause = 'where mattemptid = :mattemptid and instancecode = :instancecode
and userid = :userid and questionid = :questionid and courseid = :courseid
and quizid = :quizid and ltiid = :ltiid ';
if(isset($previousresponse['currentattemptid']) && trim($previousresponse['currentattemptid']) != '') {
$params['attemptid'] = trim($previousresponse['currentattemptid']);
$where_clause .= ' and '. $DB->sql_compare_text('attemptid') . ' = ' . $DB->sql_compare_text(':attemptid');
}
if(isset($previousresponse['resultid']) && trim($previousresponse['resultid']) != '') {
$params['resultid'] = trim($previousresponse['resultid']);
$where_clause .= ' and '. $DB->sql_compare_text('resultid') . ' = ' . $DB->sql_compare_text(':resultid');
}
if(isset($previousresponse['linkid']) && trim($previousresponse['linkid']) != '') {
$params['resourcelinkid'] = trim($previousresponse['linkid']);
$where_clause .= ' and '. $DB->sql_compare_text('resourcelinkid') . ' = ' . $DB->sql_compare_text(':resourcelinkid');
}
$checkrecord = $DB->get_records_sql('select * from {qtype_lti_usage} '.$where_clause, $params);
if($checkrecord) {
foreach($checkrecord as $rec) {
// Map them based on parentattempt.
// Only take one record, maybe many restores happened and some are not used yet.
$updaterecord = new stdClass();
$updaterecord->id = $rec->id;
$updaterecord->mattemptid = $attempt;
$updaterecord->quizid = $quizid;
$DB->update_record('qtype_lti_usage', $updaterecord);
$rec->mattemptid = $attempt;
$rec->quizid = $quizid;
// Update any grade submission table in case or restore.
$gparams = array('mattempt' => -1, 'ltiid' => $ltiid, 'username' => $username);
if(isset($params['resultid']) && trim($params['resultid']) != '') {
$gparams['linkid'] = $params['resultid'];
}
if(isset($params['resourcelinkid']) && trim($params['resourcelinkid']) != '') {
$gparams['resultid'] = $params['resourcelinkid'];
}
$gradesneedupdate = $DB->get_record('qtype_lti_submission', $gparams);
if($gradesneedupdate) {
$updategraderec = new stdClass();
$updategraderec->id = $gradesneedupdate->id;
$updategraderec->mattempt = $attempt;
$DB->update_record('qtype_lti_submission', $updategraderec);
}
return $rec;
}
}
// Seems to be totally new attempt, insert it.
$userceattemptrecord = new stdClass();
$userceattemptrecord->ltiid = $ltiid;
$userceattemptrecord->instancecode = $instancecode;
if(isset($previousresponse['currentattemptid']) && trim($previousresponse['currentattemptid']) != '') {
$userceattemptrecord->attemptid = trim($previousresponse['currentattemptid']);
} else {
$userceattemptrecord->attemptid = uniqid();
}
$userceattemptrecord->mattemptid = $attempt;
$userceattemptrecord->questionid = $questionid;
$userceattemptrecord->quizid = $quizid;
$userceattemptrecord->courseid = $courseid;
$userceattemptrecord->userid = $userid;
// ResourceLinkId: attemptid + instancecode + username.
if(isset($previousresponse['linkid']) && trim($previousresponse['linkid']) != '') {
$userceattemptrecord->resourcelinkid = trim($previousresponse['linkid']);
} else {
$userceattemptrecord->resourcelinkid = trim($userceattemptrecord->attemptid . '-' . $instancecode . '-' . $username);
}
// What if onlastattempt = 1 and new attempt?.
$quizinfo = $DB->get_record('quiz', array('id' => $quizid));
if(!$quizinfo){
$quizinfo = new stdClass();
$quizinfo->attemptonlast = 0;
}
if($quizinfo->attemptonlast == 1 && isset($previousresponse['attemptid']) && $previousresponse['attemptid'] != $attempt){
unset($previousresponse['resultid']);
}
// RestultID: attemptid + instancecode + username + uniqid().
if(isset($previousresponse['resultid']) && trim($previousresponse['resultid']) != '') {
$userceattemptrecord->resultid = trim($previousresponse['resultid']);
} else {
$userceattemptrecord->resultid = trim($userceattemptrecord->resourcelinkid . '-' . uniqid());
}
$userceattemptrecord->parentlti = $ltiid;
$userceattemptrecord->parentattempt = $attempt;
$userceattemptrecord->timeadded = time();
if(!isset($userid) || $userid == 0 || $userid == '') {
return;
}
$insertceattemptecord = $DB->insert_record('qtype_lti_usage', $userceattemptrecord);
return $userceattemptrecord;
}
}
public function formulation_and_controls(question_attempt $qa, question_display_options $options) {
global $PAGE, $CFG, $DB, $USER;
$question = $qa->get_question();
$previousresponse = $question->get_response($qa);
// Answer field.
$step = $qa->get_last_step_with_qt_var('answer');
$originaluserid = $step->get_user_id();
$currentanswer = $qa->get_last_qt_var('answer');
$currentlinkid = $qa->get_last_qt_var('linkid');
$currentattemptid = $qa->get_last_qt_var('currentattemptid');
$inputname = $qa->get_qt_field_name('answer');
$instanceid = $qa->get_qt_field_name('instanceid');
$attemptfieldname = $qa->get_qt_field_name('attemptid');
$resultidfieldname = $qa->get_qt_field_name('resultid');
$linkidfieldname = $qa->get_qt_field_name('linkid');
$uniqueattemptfieldname = $qa->get_qt_field_name('currentattemptid');
$usernamefieldname = $qa->get_qt_field_name('username');
$userid = $qa->get_qt_field_name('userid');
if(!isset($originaluserid) || $originaluserid == 0) {
$originaluserid = $qa->get_last_qt_var('userid');
}
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
$attempt = optional_param('attempt', null, PARAM_INT);
if ($attempt) {
$attemptfullrecord = $DB->get_record('quiz_attempts', array('id' => $attempt));
} else {
$attemptfullrecord = new stdClass();
$attemptfullrecord->quiz = 0;
$attempt = 0;
$attemptfullrecord->state = 'preview';
}
if (empty($question->unittest) || is_null($question->unittest)) {
$lti = $DB->get_record('qtype_lti_options', array('questionid' => $question->id), '*', MUST_EXIST);
$user = $DB->get_record('user', array('id' => $originaluserid), 'id,username', MUST_EXIST);
global $COURSE;
if(!isset($user) || !isset($user->id) || $user->id == 0) {
$ltiparams = qtype_lti_build_sourcedid('XX_TEST_XX', $attempt, 'XX_UNKNOWN_USER_XX', $lti->servicesalt,
$lti->typeid, 'XX_TEST_XX', $lti->id);
$serialparams = '';
} else {
$userceattemptrecord = $this->qtype_lti_generate_usage_record($lti->id, $lti->instancecode, $user->id,
$user->username, $attempt, $question->id,
$attemptfullrecord->quiz, $COURSE->id, $lti->toolurl, $currentanswer, $currentlinkid,
$previousresponse);
$ltiparams = qtype_lti_build_sourcedid($userceattemptrecord->resultid, $attempt, $user->username, $lti->servicesalt,
$lti->typeid, $userceattemptrecord->attemptid, $lti->id);
$serialparams = $ltiparams->data;
}
} else {
$ltiparams = new stdClass();
$serialparams = new stdClass();
$ltiparams->data = '';
$serialparams->userid = 2;
$serialparams->instanceid = '';
$lti = new stdClass();
$lti->id = 1;
$lti->servicesalt = '';
$lti->typeid = null;
}
if (!$step->has_qt_var('answer') && empty($options->readonly)) {
// Question has never been answered, fill it with response template.
$step = new question_attempt_step(array('answer' => ''));
} else {
$step = $qa->get_current_manual_mark();
// Is there a current value in the current POST data? If so, use that.
$mark = $qa->get_submitted_var($qa->get_behaviour_field_name('mark'), PARAM_RAW_TRIMMED);
if ($mark === null) {
// Otherwise, use the stored value.
// If the question max mark has not changed, use the stored value that was input.
$storedmaxmark = $qa->get_last_behaviour_var('maxmark');
if ($storedmaxmark !== null && ($storedmaxmark - $qa->get_max_mark()) < 0.0000005) {
$mark = $qa->get_last_behaviour_var('mark');
}
}
}
if (!empty($question->typeid)) {
$toolconfig = qtype_lti_get_type_config($question->typeid);
} else if ($tool = qtype_lti_get_tool_by_url_match($question->toolurl)) {
$toolconfig = qtype_lti_get_type_config($tool->id);
} else {
$toolconfig = array();
}
if (empty($options->readonly)) {
$readonlyclass = ' style="border:0px;background: #D3D3D3;" ';
$readonly = 'manuallygraded=0&questionmode=solve&';
$readonlydevstyle = '';
$reviewmodetext = '';
} else {
// If the logged user not the same user attempting the question, then mode is 'correction'.
if ($user->id != $USER->id) {
$questionmode = 'correction';
} else {
$questionmode = 'review';
}
$reviewmodetext = get_string('reviewmode', 'qtype_lti');
// Disable Read-only overlay as per COD-12.
$readonlyclass = ' style="border:0px;background: #D3D3D3;" ';
$readonly = 'questionmode=' . $questionmode . '&readonly=1&';
$readonlydevstyle = ' title="' . $reviewmodetext . '" style="background-color:#EBEBE4;" '; // Originally: #EBEBE4.
// Check if manual grade in moodle has been done to this person.
if ($mark !== null) { // Already manually graded.
$readonly = 'manuallygraded=1&' . $readonly;
} else {
$readonly = 'manuallygraded=0&' . $readonly;
}
}
// Extra Parameters specific to CodeExpert.
$extracodeexpertparameters = 'questionid=' . $question->id . '<id=' . $lti->id . '&quizid=' . $attemptfullrecord->quiz .
'&attemptid=' . $userceattemptrecord->attemptid . '&attemptstate=' . $attemptfullrecord->state .
'&mattempt=' . $attempt . '&';
$result = '<div id="qtype_lti_framediv_' . $question->id . '" class="qtype_lti_framediv" ' . $readonlydevstyle .
'><span id="quiz_timer_lti_' . $question->id .
'" style="display:none; background-color:#fff"></span>
<span class="qtype_lti_togglebutton" id="qtype_lti_togglebutton_id_' .
$question->id . '" onclick="qtype_lti_fullscreen_'.$question->id.'()"> </span><iframe id="qtype_lti_contentframe_' . $question->id .
'" border="0" height="600px" width="100%" src="' . $CFG->wwwroot . '/question/type/lti/launch.php?' .
$extracodeexpertparameters . $readonly . 'id=' . $question->id . '&userid=' . $user->id . '&resourcelinkid=' .
$userceattemptrecord->resourcelinkid . '&resultid=' . $userceattemptrecord->resultid . '" ' . $readonlyclass .
' loading="eager"></iframe></div>';
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$inputname\"
value=\"$userceattemptrecord->resultid\" id=\"qtype_lti_input_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$attemptfieldname\"
value=\"$attempt\" id=\"qtype_lti_attempt_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$instanceid\"
value=\"$lti->id\" id=\"qtype_lti_instance_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\"
name=\"$userid\" value=\"$user->id\" id=\"qtype_lti_user_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$resultidfieldname\"
value=\"$userceattemptrecord->resultid\" id=\"qtype_lti_user_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$linkidfieldname\"
value=\"$userceattemptrecord->resourcelinkid\" id=\"qtype_lti_user_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$usernamefieldname\"
value=\"$user->username\" id=\"qtype_lti_user_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"$uniqueattemptfieldname\"
value=\"$userceattemptrecord->attemptid\" id=\"qtype_lti_user_id_" . $question->id . "\">";
$result .= "<input type=\"hidden\" class=\"qtype_lti_input\" name=\"qtype_lti_status_" . $question->id . "\"
value=\"0\" id=\"id_qtype_lti_status_" . $question->id . "\">";
// Output script to make the iframe tag be as large as possible.
$result .= '
<script type="text/javascript">
//<![CDATA[
YUI().use("node", "event", function(Y) {
Y.one("#qtype_lti_input_id_"+'.$question->id.').set("value", "'.$userceattemptrecord->resultid.'");
var doc = Y.one("body");
var lti_iframeid = "#qtype_lti_contentframe_'.$question->id.'";
var lti_toggle_btn = "#qtype_lti_togglebutton_id_'.$question->id.'";
var frame = Y.one("#qtype_lti_contentframe_'.$question->id.'");
var padding = 150;
var lastHeight;
var resize = function(e) {
var viewportHeight = window.innerHeight;
var quiz_timer_div = document.getElementById("quiz-time-left");
var lti_fullsc_'.$question->id.' =
document.getElementById("quiz_timer_lti_'.$question->id.'");
if (quiz_timer_div && quiz_timer_div.innerHTML !== "") {
Y.one("#quiz_timer_lti_'.$question->id.'").
setStyle("display", "block");
var calculatedheight = viewportHeight -
Y.one("#quiz_timer_lti_'.$question->id.'").get("clientHeight");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", calculatedheight+ "px");
} else {
var calculatedheight = viewportHeight;
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", calculatedheight+ "px");
}
if (!Y.one("#qtype_lti_framediv_'.$question->id.'").
hasClass("qtype_lti_maximized") &&
calculatedheight > 650) {
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", "650px");
Y.one("#qtype_lti_framediv_'.$question->id.'").
setStyle("height", "650px");
} else {
Y.one("#qtype_lti_framediv_'.$question->id.'").
setStyle("height", calculatedheight +"px");
Y.one("#qtype_lti_framediv_'.$question->id.'").
set("height", calculatedheight +"px");
}
};
Y.on("domready", function() {
resize();
});
Y.on("windowresize", resize);
});
setTimeout(function(){ Y.one("#id_qtype_lti_status_'.$question->id.'").set("value",Math.random()); }, 3000);
function qtype_lti_fullscreen_'.$question->id.'() {
setTimeout(function(){ Y.one("#id_qtype_lti_status_'.$question->id.'").set("value",Math.random()); }, 1000);
var doc = Y.one("body");
var lti_iframeid = "#qtype_lti_contentframe_'.$question->id.'";
var lti_toggle_btn = "#qtype_lti_togglebutton_id_'.$question->id.'";
var frame = Y.one("#qtype_lti_contentframe_'.$question->id.'");
var padding = 150;
var lastHeight;
var quiz_is_timed = 0;
Y.one("#qtype_lti_framediv_'.$question->id.'").
toggleClass("qtype_lti_maximized");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
set("height","100%");
if (Y.one("#qtype_lti_framediv_'.$question->id.'").
hasClass("qtype_lti_maximized")) {
Y.one("#qtype_lti_framediv_'.$question->id.'").
set("height","100%");
Y.one("#qtype_lti_framediv_'.$question->id.'").
setStyle("height","100%");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
set("height","100%");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height","100%");
var quiz_timer_div = document.getElementById("quiz-time-left");
var lti_fullsc_'.$question->id.' =
document.getElementById("quiz_timer_lti_'.$question->id.'");
if (quiz_timer_div && quiz_timer_div.innerHTML !== "") {
lti_fullsc_'.$question->id.'.appendChild(document.getElementById("quiz-timer"));
Y.one("#quiz_timer_lti_'.$question->id.'").
setStyle("display", "block");
var calculatedheight = doc.get("winHeight") -
Y.one("#quiz_timer_lti_'.$question->id.'").
get("clientHeight");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", calculatedheight+ "px");
} else {
if (lti_fullsc_'.$question->id.'.hasChildNodes()) {
lti_fullsc_'.$question->id.'.
removeChild(document.getElementById("quiz-timer").cloneNode(true));
}
var calculatedheight = doc.get("winHeight");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", calculatedheight+ "px");
}
} else {
var viewportHeight = doc.get("winHeight");
if (viewportHeight > 650 || viewportHeight <= 500) viewportHeight = 650;
Y.one("#qtype_lti_contentframe_'.$question->id.'").
setStyle("height", viewportHeight + "px");
Y.one("#qtype_lti_contentframe_'.$question->id.'").
set("height", viewportHeight + "px");
Y.one("#qtype_lti_framediv_'.$question->id.'").
setStyle("height", viewportHeight +"px");
Y.one("#qtype_lti_framediv_'.$question->id.'").
set("height", viewportHeight +"px");
if (document.getElementById("quiz-timer")) {
document.getElementById("quiz-timer-wrapper").appendChild(document.getElementById("quiz-timer"));
Y.one("#quiz_timer_lti_'.$question->id.'").setStyle("margin-top", "0em");
Y.one("#quiz_timer_lti_'.$question->id.'").setStyle("display", "none");
}
}
}
//]]
</script>
';
return $result;
}
/**
* Defer to template.
*
* @param tool_configure_page $page
*
* @return string html for the page
*/
protected function render_tool_configure_page($page) {
$data = $page->export_for_template($this);
return parent::render_from_template('qtype_lti/tool_configure', $data);
}
/**
* Render the external registration return page
*
* @param tool_configure_page $page
*
* @return string html for the page
*/
protected function render_external_registration_return_page($page) {
$data = $page->export_for_template($this);
return parent::render_from_template('qtype_lti/external_registration_return', $data);
}
}