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