<?php

// This file is part of Stack - http://stack.bham.ac.uk/

//

// Stack 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.

//

// Stack 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 Stack. If not, see <http://www.gnu.org/licenses/>.

/**

* Script to download the export of a single STACK question.

*

* @copyright 2015 the Open University

* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

*/

require_once(__DIR__.'/../../../config.php');

require_once($CFG->libdir . '/questionlib.php');

require_once($CFG->dirroot . '/question/format/xml/format.php');

require_once(__DIR__ . '/locallib.php');

// Get the parameters from the URL.

$questionid = required_param('questionid', PARAM_INT);

// Load the necessary data.

$questiondata = $DB->get_record('question', array('id' => $questionid), '*', MUST_EXIST);

get_question_options($questiondata);

$question = question_bank::load_question($questionid);

// Process any other URL parameters, and do require_login.

list($context, $seed, $urlparams) = qtype_stack_setup_question_test_page($question);

$contexts = new question_edit_contexts($context);

// Check permissions.

question_require_capability_on($questiondata, 'edit');

require_sesskey();

// Initialise $PAGE.

$nexturl = new moodle_url('/question/type/stack/questiontestrun.php', $urlparams);

$PAGE->set_url($nexturl); // Since this script always ends in a redirect.

$PAGE->set_heading($COURSE->fullname);

$PAGE->set_pagelayout('admin');

// Set up the export format.

$qformat = new qformat_xml();

$filename = question_default_export_filename($COURSE, $questiondata) .

$qformat->export_file_extension();

$qformat->setContexts($contexts->having_one_edit_tab_cap('export'));

$qformat->setCourse($COURSE);

$qformat->setQuestions(array($questiondata));

$qformat->setCattofile(false);

$qformat->setContexttofile(false);

// Do the export.

if (!$qformat->exportpreprocess()) {

send_file_not_found();

}

if (!$content = $qformat->exportprocess(true)) {

send_file_not_found();

}

send_file($content, $filename, 0, 0, true, true, $qformat->mime_type());