<?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/>.

/**

* Displays the subpage.

*

* @package mod_subpage

* @copyright 2014 The Open University

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

*/

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

require_once('locallib.php');

require_once('lib.php');

require_once($CFG->dirroot.'/course/lib.php');

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

$cmid = optional_param('id', 0, PARAM_INT);

$edit = optional_param('edit', -1, PARAM_BOOL);

$hide = optional_param('hide', 0, PARAM_INT);

$show = optional_param('show', 0, PARAM_INT);

$section = optional_param('section', 0, PARAM_INT);

$sectiontitle = optional_param('sectiontitle', '', PARAM_TEXT);

$move = optional_param('move', 0, PARAM_INT);

$delete = optional_param('delete', 0, PARAM_INT);

$copy = optional_param('copy', 0, PARAM_INT);

$confirm = optional_param('confirm', 0, PARAM_INT);

$addsection = optional_param('addsection', 0, PARAM_INT);

$recache = optional_param('recache', 0, PARAM_INT);

$cancelcopy = optional_param('cancelcopy', 0, PARAM_BOOL);

if (empty($cmid)) {

print_error('unspecifysubpageid', 'subpage');

}

if (!empty($cancelcopy) && confirm_sesskey()) {

unset($USER->activitycopy);

unset($USER->activitycopycourse);

unset($USER->activitycopyname);

redirect("view.php?id=$cmid");

}

// This must be done first because some horrible combination of junk means that

// page might be initialised before we expect.

$PAGE->set_pagelayout('incourse');

$subpage = mod_subpage::get_from_cmid($cmid);

$course = $subpage->get_course();

// Defined here to avoid notices on errors etc.

$thisurl = new moodle_url('/mod/subpage/view.php', array('id' => $cmid));

$PAGE->set_url($thisurl);

$PAGE->set_cm($subpage->get_course_module());

$modcontext = context_module::instance($cmid);

require_login($course, true, $subpage->get_course_module());

require_capability('mod/subpage:view', $modcontext);

$event = \mod_subpage\event\course_module_viewed::create(array(

'objectid' => $subpage->get_course_module()->instance,

'context' => $modcontext,

));

$event->add_record_snapshot('course', $course);

$event->trigger();

if (!empty($recache) && confirm_sesskey()) {

$context = context_course::instance($subpage->get_course()->id);

require_capability('moodle/course:manageactivities', $context);

rebuild_course_cache($course->id, true);

redirect($thisurl);

}

if (!empty($copy) and confirm_sesskey()) { // value = course module

if (!$cm = get_coursemodule_from_id('', $copy, 0, true)) {

print_error('invalidcoursemodule');

}

$context = context_course::instance($cm->course);

require_capability('moodle/course:manageactivities', $context);

if (!$section = $DB->get_record('course_sections', array('id' => $cm->section))) {

print_error('sectionnotexist');

}

$USER->activitycopy = $copy;

$USER->activitycopycourse = $cm->course;

$USER->activitycopyname = $cm->name;

} else if (!empty($delete) and confirm_sesskey()) {

require_capability('moodle/course:update', $modcontext);

if (empty($confirm)) {

if (!$section = $DB->get_record('course_sections', array('id' => $delete))) {

print_error('sectionnotexist');

}

$sectionname = $section->id;

if (!empty($section->name)) {

$sectionname = format_string($section->name);

}

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

$pagelink = 'view.php?id='.$subpage->get_course_module()->id;

echo $OUTPUT->header();

echo $OUTPUT->confirm(get_string('sectiondeleteconfirm', 'subpage', $sectionname),

$pagelink.'&delete='.$delete.'&confirm=1', $pagelink);

echo $OUTPUT->footer();

exit;

} else {

// Check to see whether section exists.

if (!$section = $DB->get_record('course_sections', array('id' => $delete))) {

print_error('sectionnotexist');

}

// Check to see whether section has any content or is empty, if not empty get out.

if (! empty($section->sequence)) {

print_error('error_deletingsection', 'subpage');

}

// Delete section.

$subpage->delete_section($delete);

}

}

$PAGE->set_other_editing_capability('moodle/course:manageactivities');

if (!isset($USER->editing)) {

$USER->editing = 0;

}

if ($PAGE->user_allowed_editing()) {

if (($edit == 1) and confirm_sesskey()) {

$USER->editing = 1;

redirect($PAGE->url);

} else if (($edit == 0) and confirm_sesskey()) {

$USER->editing = 0;

if (!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {

$USER->activitycopy = false;

$USER->activitycopycourse = null;

}

redirect($PAGE->url);

}

if ($addsection && confirm_sesskey()) {

$subpage->add_section($sectiontitle);

redirect($PAGE->url);

}

if ($hide && confirm_sesskey()) {

require_capability('moodle/course:sectionvisibility', $modcontext);

set_section_visible($course->id, $hide, '0');

}

if ($show && confirm_sesskey()) {

require_capability('moodle/course:sectionvisibility', $modcontext);

set_section_visible($course->id, $show, '1');

}

if (!empty($section)) {

if (!empty($move) && confirm_sesskey()) {

require_capability('moodle/course:movesections', $modcontext);

$pageorder = $DB->get_field('subpage_sections', 'pageorder',

array('subpageid' => $subpage->get_subpage()->id, 'sectionid' => $section));

$subpage->move_section($section, $pageorder + $move);

rebuild_course_cache($course->id, true);

}

}

} else {

$USER->editing = 0;

}

$SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;

if ($course->id == SITEID) {

// This course is not a real course.

redirect($CFG->wwwroot .'/');

}

// AJAX-capable?

$useajax = false;

// This will add a new class to the header so we can style differently.

$CFG->blocksdrag = $useajax;

$completion = new completion_info($course);

if ($completion->is_enabled()) {

$PAGE->requires->string_for_js('completion-title-manual-y', 'completion');

$PAGE->requires->string_for_js('completion-title-manual-n', 'completion');

$PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');

$PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');

$PAGE->requires->js_init_call('M.core_completion.init');

}

$completion = new completion_info($course);

$completion->set_module_viewed($subpage->get_course_module());

$PAGE->set_title(strip_tags($subpage->get_course()->shortname . ': ' .

format_string($subpage->get_name())));

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

echo $OUTPUT->header();

echo $OUTPUT->heading(format_string($subpage->get_name()));

if ($completion->is_enabled()) {

// This value tracks whether there has been a dynamic change to the page.

// It is used so that if a user does this - (a) set some tickmarks, (b)

// go to another page, (c) clicks Back button - the page will

// automatically reload. Otherwise it would start with the wrong tick

// values.

echo html_writer::start_tag('form', array('action' => '.', 'method' => 'get'));

echo html_writer::start_tag('div');

echo html_writer::empty_tag('input', array('type' => 'hidden',

'id' => 'completion_dynamic_change', 'name' => 'completion_dynamic_change', 'value' => '0'));

echo html_writer::end_tag('div');

echo html_writer::end_tag('form');

}

// Course wrapper start.

echo html_writer::start_tag('div', array('class' => 'course-content'));

$modinfo = get_fast_modinfo($COURSE);

if (! $sections = $subpage->get_sections()) { // No sections found

// Double-check to be extra sure.

$subpage->add_section();

if (! $sections = $subpage->get_sections() ) { // Try again.

print_error('cannotcreateorfindstructs', 'error');

}

}

$renderer = $PAGE->get_renderer('mod_subpage');

echo $renderer->render_subpage($subpage, $modinfo, $sections, $PAGE->user_is_editing(),

$move, has_capability('moodle/course:movesections', $modcontext),

has_capability('moodle/course:sectionvisibility', $modcontext));

// Content wrapper end.

echo html_writer::end_tag('div');

$modnamesused = $modinfo->get_used_module_names();

include_course_ajax($COURSE, $modnamesused);

echo $OUTPUT->footer();