course/view.php

   1 <?php
   2
   3 //  Display the course home page.
   4
   5     require_once('../config.php');
   6     require_once('lib.php');
   7     require_once($CFG->libdir.'/completionlib.php');
   8
   9     $id          = optional_param('id', 0, PARAM_INT);
  10     $name        = optional_param('name', '', PARAM_TEXT);
  11     $edit        = optional_param('edit', -1, PARAM_BOOL);
  12     $hide        = optional_param('hide', 0, PARAM_INT);
  13     $show        = optional_param('show', 0, PARAM_INT);
  14     $idnumber    = optional_param('idnumber', '', PARAM_RAW);
  15     $sectionid   = optional_param('sectionid', 0, PARAM_INT);
  16     $section     = optional_param('section', 0, PARAM_INT);
  17     $move        = optional_param('move', 0, PARAM_INT);
  18     $marker      = optional_param('marker',-1 , PARAM_INT);
  19     $switchrole  = optional_param('switchrole',-1, PARAM_INT); // Deprecated, use course/switchrole.php instead.
  20     $return      = optional_param('return', 0, PARAM_LOCALURL);
  21
  22     $params = array();
  23     if (!empty($name)) {
  24         $params = array('shortname' => $name);
  25     } else if (!empty($idnumber)) {
  26         $params = array('idnumber' => $idnumber);
  27     } else if (!empty($id)) {
  28         $params = array('id' => $id);
  29     }else {
  30         print_error('unspecifycourseid', 'error');
  31     }
  32
  33     $course = $DB->get_record('course', $params, '*', MUST_EXIST);
  34
  35     $urlparams = array('id' => $course->id);
  36
  37     // Sectionid should get priority over section number
  38     if ($sectionid) {
  39         $section = $DB->get_field('course_sections', 'section', array('id' => $sectionid, 'course' => $course->id), MUST_EXIST);
  40     }
  41     if ($section) {
  42         $urlparams['section'] = $section;
  43     }
  44
  45     $PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc
  46
  47     // Prevent caching of this page to stop confusion when changing page after making AJAX changes
  48     $PAGE->set_cacheable(false);
  49
  50     context_helper::preload_course($course->id);
  51     $context = context_course::instance($course->id, MUST_EXIST);
  52
  53     // Remove any switched roles before checking login
  54     if ($switchrole == 0 && confirm_sesskey()) {
  55         role_switch($switchrole, $context);
  56     }
  57
  58     require_login($course);
  59
  60     // Switchrole - sanity check in cost-order...
  61     $reset_user_allowed_editing = false;
  62     if ($switchrole > 0 && confirm_sesskey() &&
  63         has_capability('moodle/role:switchroles', $context)) {
  64         // is this role assignable in this context?
  65         // inquiring minds want to know...
  66         $aroles = get_switchable_roles($context);
  67         if (is_array($aroles) && isset($aroles[$switchrole])) {
  68             role_switch($switchrole, $context);
  69             // Double check that this role is allowed here
  70             require_login($course);
  71         }
  72         // reset course page state - this prevents some weird problems ;-)
  73         $USER->activitycopy = false;
  74         $USER->activitycopycourse = NULL;
  75         unset($USER->activitycopyname);
  76         unset($SESSION->modform);
  77         $USER->editing = 0;
  78         $reset_user_allowed_editing = true;
  79     }
  80
  81     //If course is hosted on an external server, redirect to corresponding
  82     //url with appropriate authentication attached as parameter
  83     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  84         include $CFG->dirroot .'/course/externservercourse.php';
  85         if (function_exists('extern_server_course')) {
  86             if ($extern_url = extern_server_course($course)) {
  87                 redirect($extern_url);
  88             }
  89         }
  90     }
  91
  92
  93     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  94
  95     // Must set layout before gettting section info. See MDL-47555.
  96     $PAGE->set_pagelayout('course');
  97     $PAGE->add_body_class('limitedwidth');
  98
  99     if ($section and $section > 0) {
 100
 101         // Get section details and check it exists.
 102         $modinfo = get_fast_modinfo($course);
 103         $coursesections = $modinfo->get_section_info($section, MUST_EXIST);
 104
 105         // Check user is allowed to see it.
 106         if (!$coursesections->uservisible) {
 107             // Check if coursesection has conditions affecting availability and if
 108             // so, output availability info.
 109             if ($coursesections->visible && $coursesections->availableinfo) {
 110                 $sectionname     = get_section_name($course, $coursesections);
 111                 $message = get_string('notavailablecourse', '', $sectionname);
 112                 redirect(course_get_url($course), $message, null, \core\output\notification::NOTIFY_ERROR);
 113             } else {
 114                 // Note: We actually already know they don't have this capability
 115                 // or uservisible would have been true; this is just to get the
 116                 // correct error message shown.
 117                 require_capability('moodle/course:viewhiddensections', $context);
 118             }
 119         }
 120     }
 121
 122     // Fix course format if it is no longer installed
 123     $format = course_get_format($course);
 124     $course->format = $format->get_format();
 125
 126     $PAGE->set_pagetype('course-view-' . $course->format);
 127     $PAGE->set_other_editing_capability('moodle/course:update');
 128     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 129     $PAGE->set_other_editing_capability('moodle/course:activityvisibility');
 130     if (course_format_uses_sections($course->format)) {
 131         $PAGE->set_other_editing_capability('moodle/course:sectionvisibility');
 132         $PAGE->set_other_editing_capability('moodle/course:movesections');
 133     }
 134
 135     // Preload course format renderer before output starts.
 136     // This is a little hacky but necessary since
 137     // format.php is not included until after output starts
 138     $format->get_renderer($PAGE);
 139
 140     if ($reset_user_allowed_editing) {
 141         // ugly hack
 142         unset($PAGE->_user_allowed_editing);
 143     }
 144
 145     if (!isset($USER->editing)) {
 146         $USER->editing = 0;
 147     }
 148     if ($PAGE->user_allowed_editing()) {
 149         if (($edit == 1) and confirm_sesskey()) {
 150             $USER->editing = 1;
 151             // Redirect to site root if Editing is toggled on frontpage
 152             if ($course->id == SITEID) {
 153                 redirect($CFG->wwwroot .'/?redirect=0');
 154             } else if (!empty($return)) {
 155                 redirect($CFG->wwwroot . $return);
 156             } else {
 157                 $url = new moodle_url($PAGE->url, array('notifyeditingon' => 1));
 158                 redirect($url);
 159             }
 160         } else if (($edit == 0) and confirm_sesskey()) {
 161             $USER->editing = 0;
 162             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 163                 $USER->activitycopy       = false;
 164                 $USER->activitycopycourse = NULL;
 165             }
 166             // Redirect to site root if Editing is toggled on frontpage
 167             if ($course->id == SITEID) {
 168                 redirect($CFG->wwwroot .'/?redirect=0');
 169             } else if (!empty($return)) {
 170                 redirect($CFG->wwwroot . $return);
 171             } else {
 172                 redirect($PAGE->url);
 173             }
 174         }
 175
 176         if (has_capability('moodle/course:sectionvisibility', $context)) {
 177             if ($hide && confirm_sesskey()) {
 178                 set_section_visible($course->id, $hide, '0');
 179                 redirect($PAGE->url);
 180             }
 181
 182             if ($show && confirm_sesskey()) {
 183                 set_section_visible($course->id, $show, '1');
 184                 redirect($PAGE->url);
 185             }
 186         }
 187
 188         if (!empty($section) && !empty($move) &&
 189                 has_capability('moodle/course:movesections', $context) && confirm_sesskey()) {
 190             $destsection = $section + $move;
 191             if (move_section_to($course, $section, $destsection)) {
 192                 if ($course->id == SITEID) {
 193                     redirect($CFG->wwwroot . '/?redirect=0');
 194                 } else {
 195                     if ($format->get_course_display() == COURSE_DISPLAY_MULTIPAGE) {
 196                         redirect(course_get_url($course));
 197                     } else {
 198                         redirect(course_get_url($course, $destsection));
 199                     }
 200                 }
 201             } else {
 202                 echo $OUTPUT->notification('An error occurred while moving a section');
 203             }
 204         }
 205     } else {
 206         $USER->editing = 0;
 207     }
 208
 209     $SESSION->fromdiscussion = $PAGE->url->out(false);
 210
 211
 212     if ($course->id == SITEID) {
 213         // This course is not a real course.
 214         redirect($CFG->wwwroot .'/?redirect=0');
 215     }
 216
 217     // Determine whether the user has permission to download course content.
 218     $candownloadcourse = \core\content::can_export_context($context, $USER);
 219
 220     // We are currently keeping the button here from 1.x to help new teachers figure out
 221     // what to do, even though the link also appears in the course admin block.  It also
 222     // means you can back out of a situation where you removed the admin block. :)
 223     if ($PAGE->user_allowed_editing()) {
 224         $buttons = $OUTPUT->edit_button($PAGE->url);
 225         $PAGE->set_button($buttons);
 226     }
 227
 228     // If viewing a section, make the title more specific
 229     if ($section and $section > 0 and course_format_uses_sections($course->format)) {
 230         $sectionname = get_string('sectionname', "format_$course->format");
 231         $sectiontitle = get_section_name($course, $section);
 232         $PAGE->set_title(get_string('coursesectiontitle', 'moodle', array('course' => $course->fullname, 'sectiontitle' => $sectiontitle, 'sectionname' => $sectionname)));
 233     } else {
 234         $PAGE->set_title(get_string('coursetitle', 'moodle', array('course' => $course->fullname)));
 235     }
 236
 237     $PAGE->set_heading($course->fullname);
 238     echo $OUTPUT->header();
 239
 240     if ($USER->editing == 1) {
 241
 242         // MDL-65321 The backup libraries are quite heavy, only require the bare minimum.
 243         require_once($CFG->dirroot . '/backup/util/helper/async_helper.class.php');
 244
 245         if (async_helper::is_async_pending($id, 'course', 'backup')) {
 246             echo $OUTPUT->notification(get_string('pendingasyncedit', 'backup'), 'warning');
 247         }
 248     }
 249
 250     // Course wrapper start.
 251     echo html_writer::start_tag('div', array('class'=>'course-content'));
 252
 253     // make sure that section 0 exists (this function will create one if it is missing)
 254     course_create_sections_if_missing($course, 0);
 255
 256     // get information about course modules and existing module types
 257     // format.php in course formats may rely on presence of these variables
 258     $modinfo = get_fast_modinfo($course);
 259     $modnames = get_module_types_names();
 260     $modnamesplural = get_module_types_names(true);
 261     $modnamesused = $modinfo->get_used_module_names();
 262     $mods = $modinfo->get_cms();
 263     $sections = $modinfo->get_section_info_all();
 264
 265     // CAUTION, hacky fundamental variable defintion to follow!
 266     // Note that because of the way course fromats are constructed though
 267     // inclusion we pass parameters around this way..
 268     $displaysection = $section;
 269
 270     // Include course AJAX
 271     include_course_ajax($course, $modnamesused);
 272
 273     // Include the actual course format.
 274     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 275     // Content wrapper end.
 276
 277     echo html_writer::end_tag('div');
 278
 279     // Trigger course viewed event.
 280     // We don't trust $context here. Course format inclusion above executes in the global space. We can't assume
 281     // anything after that point.
 282     course_view(context_course::instance($course->id), $section);
 283
 284     // If available, include the JS to prepare the download course content modal.
 285     if ($candownloadcourse) {
 286         $PAGE->requires->js_call_amd('core_course/downloadcontent', 'init');
 287     }
 288
 289     // Load the view JS module if completion tracking is enabled for this course.
 290     $completion = new completion_info($course);
 291     if ($completion->is_enabled()) {
 292         $PAGE->requires->js_call_amd('core_course/view', 'init');
 293     }
 294
 295     echo $OUTPUT->footer();