Proyectos de Subversion Moodle

<?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/>.

/**

 * Display the course home page.

 *

 * @copyright 1999 Martin Dougiamas  http://dougiamas.com

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

 * @package core_course

 */

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

require_once('lib.php');

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

redirect_if_major_upgrade_required();

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

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

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

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

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

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

$idnumber = optional_param('idnumber', '', PARAM_RAW);

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

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

$expandsection = optional_param('expandsection', -1, PARAM_INT);

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

$marker = optional_param('marker', -1 , PARAM_INT);

$switchrole = optional_param('switchrole', -1, PARAM_INT); // Deprecated, use course/switchrole.php instead.

$return = optional_param('return', 0, PARAM_LOCALURL);

$params = [];

if (!empty($name)) {

    $params = ['shortname' => $name];

} else if (!empty($idnumber)) {

    $params = ['idnumber' => $idnumber];

} else if (!empty($id)) {

    $params = ['id' => $id];

} else {

    throw new \moodle_exception('unspecifycourseid', 'error');

}

$course = $DB->get_record('course', $params, '*', MUST_EXIST);

$urlparams = ['id' => $course->id];

// Sectionid should get priority over section number.

if ($sectionid) {

    $section = $DB->get_field('course_sections', 'section', ['id' => $sectionid, 'course' => $course->id], MUST_EXIST);

}

if (!is_null($section)) {

    $urlparams['section'] = $section;

}

if ($expandsection !== -1) {

    $urlparams['expandsection'] = $expandsection;

}

$PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc.

// Prevent caching of this page to stop confusion when changing page after making AJAX changes.

$PAGE->set_cacheable(false);

context_helper::preload_course($course->id);

$context = context_course::instance($course->id, MUST_EXIST);

// Remove any switched roles before checking login.

if ($switchrole == 0 && confirm_sesskey()) {

    role_switch($switchrole, $context);

}

require_login($course);

// Switchrole - sanity check in cost-order...

$resetuserallowedediting = false;

if ($switchrole > 0 && confirm_sesskey() &&

    has_capability('moodle/role:switchroles', $context)) {

    // Is this role assignable in this context?

    // Inquiring minds want to know.

    $aroles = get_switchable_roles($context);

    if (is_array($aroles) && isset($aroles[$switchrole])) {

        role_switch($switchrole, $context);

        // Double check that this role is allowed here.

        require_login($course);

    }

    // Reset course page state. This prevents some weird problems.

    $USER->activitycopy = false;

    $USER->activitycopycourse = null;

    unset($USER->activitycopyname);

    unset($SESSION->modform);

    $USER->editing = 0;

    $resetuserallowedediting = true;

}

// If course is hosted on an external server, redirect to corresponding

// url with appropriate authentication attached as parameter.

if (file_exists($CFG->dirroot . '/course/externservercourse.php')) {

    include($CFG->dirroot . '/course/externservercourse.php');

    if (function_exists('extern_server_course')) {

        if ($externurl = extern_server_course($course)) {

            redirect($externurl);

        }

    }

}

require_once($CFG->dirroot.'/calendar/lib.php'); // This is after login because it needs $USER.

// Must set layout before gettting section info. See MDL-47555.

$PAGE->set_pagelayout('course');

$PAGE->add_body_class('limitedwidth');

if ($section && $section > 0) {

    // Get section details and check it exists.

    $modinfo = get_fast_modinfo($course);

    $coursesections = $modinfo->get_section_info($section, MUST_EXIST);

    // Check user is allowed to see it.

    if (!$coursesections->uservisible) {

        // Check if coursesection has conditions affecting availability and if

        // so, output availability info.

        if ($coursesections->visible && $coursesections->availableinfo) {

            $sectionname = get_section_name($course, $coursesections);

            $message = get_string('notavailablecourse', '', $sectionname);

            redirect(course_get_url($course), $message, null, \core\output\notification::NOTIFY_ERROR);

        } else {

            // Note: We actually already know they don't have this capability

            // or uservisible would have been true; this is just to get the

            // correct error message shown.

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

        }

    }

}

// Fix course format if it is no longer installed.

$format = course_get_format($course);

$course->format = $format->get_format();

$PAGE->set_pagetype('course-view-' . $course->format);

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

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

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

if (course_format_uses_sections($course->format)) {

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

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

}

// Preload course format renderer before output starts.

// This is a little hacky but necessary since

// format.php is not included until after output starts.

$renderer = $format->get_renderer($PAGE);

if ($resetuserallowedediting) {

    // Ugly hack.

    unset($PAGE->_user_allowed_editing);

}

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

    $USER->editing = 0;

}

if ($PAGE->user_allowed_editing()) {

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

        $USER->editing = 1;

        // Redirect to site root if Editing is toggled on frontpage.

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

            redirect($CFG->wwwroot .'/?redirect=0');

        } else if (!empty($return)) {

            redirect($CFG->wwwroot . $return);

        } else {

            $url = new moodle_url($PAGE->url, ['notifyeditingon' => 1]);

            redirect($url);

        }

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

        $USER->editing = 0;

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

            $USER->activitycopy = false;

            $USER->activitycopycourse = null;

        }

        // Redirect to site root if Editing is toggled on frontpage.

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

            redirect($CFG->wwwroot .'/?redirect=0');

        } else if (!empty($return)) {

            redirect($CFG->wwwroot . $return);

        } else {

            redirect($PAGE->url);

        }

    }

    if (has_capability('moodle/course:sectionvisibility', $context)) {

        if ($hide && confirm_sesskey()) {

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

            if ($sectionid) {

                redirect(course_get_url($course, $section, ['navigation' => true]));

            } else {

                redirect($PAGE->url);

            }

        }

        if ($show && confirm_sesskey()) {

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

            if ($sectionid) {

                redirect(course_get_url($course, $section, ['navigation' => true]));

            } else {

                redirect($PAGE->url);

            }

        }

    }

    if ($marker >= 0 && confirm_sesskey()) {

        course_set_marker($course->id, $marker);

        if ($sectionid) {

            redirect(course_get_url($course, $section, ['navigation' => true]));

        } else {

            redirect($PAGE->url);

        }

    }

    if (

        !empty($section) && !empty($coursesections) && !empty($duplicatesection)

        && has_capability('moodle/course:update', $context) && confirm_sesskey()

    ) {

        $newsection = $format->duplicate_section($coursesections);

        redirect(course_get_url($course, $newsection->section));

    }

    if (!empty($section) && !empty($move) &&

            has_capability('moodle/course:movesections', $context) && confirm_sesskey()) {

        $destsection = $section + $move;

        if (move_section_to($course, $section, $destsection)) {

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

                redirect($CFG->wwwroot . '/?redirect=0');

            } else {

                if ($format->get_course_display() == COURSE_DISPLAY_MULTIPAGE) {

                    redirect(course_get_url($course));

                } else {

                    redirect(course_get_url($course, $destsection));

                }

            }

        } else {

            echo $OUTPUT->notification('An error occurred while moving a section');

        }

    }

} else {

    $USER->editing = 0;

}

$SESSION->fromdiscussion = $PAGE->url->out(false);

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

    // This course is not a real course.

    redirect($CFG->wwwroot .'/?redirect=0');

}

// Determine whether the user has permission to download course content.

$candownloadcourse = \core\content::can_export_context($context, $USER);

// We are currently keeping the button here from 1.x to help new teachers figure out

// what to do, even though the link also appears in the course admin block.  It also

// means you can back out of a situation where you removed the admin block.

if ($PAGE->user_allowed_editing()) {

    $buttons = $OUTPUT->edit_button($PAGE->url);

    $PAGE->set_button($buttons);

}

$editingtitle = '';

if ($PAGE->user_is_editing()) {

    // Append this to the page title's lang string to get its equivalent when editing mode is turned on.

    $editingtitle = 'editing';

}

// If viewing a section, make the title more specific.

if ($section && $section > 0 && course_format_uses_sections($course->format)) {

    $sectionname = get_string('sectionname', "format_$course->format");

    $sectiontitle = get_section_name($course, $section);

    $PAGE->set_title(

        get_string(

            'coursesectiontitle' . $editingtitle,

            'moodle',

            ['course' => $course->fullname, 'sectiontitle' => $sectiontitle, 'sectionname' => $sectionname]

        )

    );

} else {

    $PAGE->set_title(get_string('coursetitle' . $editingtitle, 'moodle', ['course' => $course->fullname]));

}

// Add bulk editing control.

$bulkbutton = $renderer->bulk_editing_button($format);

if (!empty($bulkbutton)) {

    $PAGE->add_header_action($bulkbutton);

}

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

echo $OUTPUT->header();

// Show communication room status notification.

if (has_capability('moodle/course:update', $context)) {

    core_communication\helper::get_course_communication_status_notification($course);

}

if ($USER->editing == 1) {

    // MDL-65321 The backup libraries are quite heavy, only require the bare minimum.

    require_once($CFG->dirroot . '/backup/util/helper/async_helper.class.php');

    if (async_helper::is_async_pending($id, 'course', 'backup')) {

        echo $OUTPUT->notification(get_string('pendingasyncedit', 'backup'), 'warning');

    }

}

// Course wrapper start.

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

// Make sure that section 0 exists (this function will create one if it is missing).

course_create_sections_if_missing($course, 0);

// Get information about course modules and existing module types.

// format.php in course formats may rely on presence of these variables.

$modinfo = get_fast_modinfo($course);

$modnames = get_module_types_names();

$modnamesplural = get_module_types_names(true);

$modnamesused = $modinfo->get_used_module_names();

$mods = $modinfo->get_cms();

$sections = $modinfo->get_section_info_all();

// CAUTION, hacky fundamental variable defintion to follow!

// Note that because of the way course fromats are constructed though

// inclusion we pass parameters around this way.

$displaysection = $section;

// Include course AJAX.

include_course_ajax($course, $modnamesused);

// Include the actual course format.

require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');

// Content wrapper end.

echo html_writer::end_tag('div');

// Trigger course viewed event.

// We don't trust $context here. Course format inclusion above executes in the global space. We can't assume

// anything after that point.

course_view(context_course::instance($course->id), $section);

// If available, include the JS to prepare the download course content modal.

if ($candownloadcourse) {

    $PAGE->requires->js_call_amd('core_course/downloadcontent', 'init');

}

// Load the view JS module if completion tracking is enabled for this course.

$completion = new completion_info($course);

if ($completion->is_enabled()) {

    $PAGE->requires->js_call_amd('core_course/view', 'init');

}

echo $OUTPUT->footer();