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($CFG->dirroot.'/mod/forum/lib.php');
   8     require_once($CFG->libdir.'/conditionlib.php');
   9     require_once($CFG->libdir.'/completionlib.php');
  10
  11     $id          = optional_param('id', 0, PARAM_INT);
  12     $name        = optional_param('name', '', PARAM_RAW);
  13     $edit        = optional_param('edit', -1, PARAM_BOOL);
  14     $hide        = optional_param('hide', 0, PARAM_INT);
  15     $show        = optional_param('show', 0, PARAM_INT);
  16     $idnumber    = optional_param('idnumber', '', PARAM_RAW);
  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);
  21     $modchooser  = optional_param('modchooser', -1, PARAM_BOOL);
  22
  23     $params = array();
  24     if (!empty($name)) {
  25         $params = array('shortname' => $name);
  26     } else if (!empty($idnumber)) {
  27         $params = array('idnumber' => $idnumber);
  28     } else if (!empty($id)) {
  29         $params = array('id' => $id);
  30     }else {
  31         print_error('unspecifycourseid', 'error');
  32     }
  33
  34     $course = $DB->get_record('course', $params, '*', MUST_EXIST);
  35
  36     $urlparams = array('id' => $course->id);
  37     if ($section) {
  38         $urlparams['section'] = $section;
  39     }
  40
  41     $PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc
  42
  43     // Prevent caching of this page to stop confusion when changing page after making AJAX changes
  44     $PAGE->set_cacheable(false);
  45
  46     preload_course_contexts($course->id);
  47     $context = context_course::instance($course->id, MUST_EXIST);
  48
  49     // Remove any switched roles before checking login
  50     if ($switchrole == 0 && confirm_sesskey()) {
  51         role_switch($switchrole, $context);
  52     }
  53
  54     require_login($course);
  55
  56     // Switchrole - sanity check in cost-order...
  57     $reset_user_allowed_editing = false;
  58     if ($switchrole > 0 && confirm_sesskey() &&
  59         has_capability('moodle/role:switchroles', $context)) {
  60         // is this role assignable in this context?
  61         // inquiring minds want to know...
  62         $aroles = get_switchable_roles($context);
  63         if (is_array($aroles) && isset($aroles[$switchrole])) {
  64             role_switch($switchrole, $context);
  65             // Double check that this role is allowed here
  66             require_login($course);
  67         }
  68         // reset course page state - this prevents some weird problems ;-)
  69         $USER->activitycopy = false;
  70         $USER->activitycopycourse = NULL;
  71         unset($USER->activitycopyname);
  72         unset($SESSION->modform);
  73         $USER->editing = 0;
  74         $reset_user_allowed_editing = true;
  75     }
  76
  77     //If course is hosted on an external server, redirect to corresponding
  78     //url with appropriate authentication attached as parameter
  79     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  80         include $CFG->dirroot .'/course/externservercourse.php';
  81         if (function_exists('extern_server_course')) {
  82             if ($extern_url = extern_server_course($course)) {
  83                 redirect($extern_url);
  84             }
  85         }
  86     }
  87
  88
  89     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  90
  91     //TODO: danp do we need different urls?
  92     add_to_log($course->id, 'course', 'view', "view.php?id=$course->id", "$course->id");
  93
  94     $course->format = clean_param($course->format, PARAM_ALPHA);
  95     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
  96         $course->format = 'weeks';  // Default format is weeks
  97     }
  98
  99     $PAGE->set_pagelayout('course');
 100     $PAGE->set_pagetype('course-view-' . $course->format);
 101     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 102
 103     if ($reset_user_allowed_editing) {
 104         // ugly hack
 105         unset($PAGE->_user_allowed_editing);
 106     }
 107
 108     if (!isset($USER->editing)) {
 109         $USER->editing = 0;
 110     }
 111     if ($PAGE->user_allowed_editing()) {
 112         if (($edit == 1) and confirm_sesskey()) {
 113             $USER->editing = 1;
 114             // Redirect to site root if Editing is toggled on frontpage
 115             if ($course->id == SITEID) {
 116                 redirect($CFG->wwwroot .'/?redirect=0');
 117             } else {
 118                 redirect($PAGE->url);
 119             }
 120         } else if (($edit == 0) and confirm_sesskey()) {
 121             $USER->editing = 0;
 122             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 123                 $USER->activitycopy       = false;
 124                 $USER->activitycopycourse = NULL;
 125             }
 126             // Redirect to site root if Editing is toggled on frontpage
 127             if ($course->id == SITEID) {
 128                 redirect($CFG->wwwroot .'/?redirect=0');
 129             } else {
 130                 redirect($PAGE->url);
 131             }
 132         }
 133         if (($modchooser == 1) && confirm_sesskey()) {
 134             set_user_preference('usemodchooser', $modchooser);
 135         } else if (($modchooser == 0) && confirm_sesskey()) {
 136             set_user_preference('usemodchooser', $modchooser);
 137         }
 138
 139         if (has_capability('moodle/course:update', $context)) {
 140             if ($hide && confirm_sesskey()) {
 141                 set_section_visible($course->id, $hide, '0');
 142                 redirect($PAGE->url);
 143             }
 144
 145             if ($show && confirm_sesskey()) {
 146                 set_section_visible($course->id, $show, '1');
 147                 redirect($PAGE->url);
 148             }
 149
 150             if (!empty($section)) {
 151                 if (!empty($move) and confirm_sesskey()) {
 152                     if (move_section($course, $section, $move)) {
 153                         if ($course->id == SITEID) {
 154                             redirect($CFG->wwwroot . '/?redirect=0');
 155                         } else {
 156                             redirect(course_get_url($course));
 157                         }
 158                     } else {
 159                         echo $OUTPUT->notification('An error occurred while moving a section');
 160                     }
 161                 }
 162             }
 163         }
 164     } else {
 165         $USER->editing = 0;
 166     }
 167
 168     $SESSION->fromdiscussion = $PAGE->url->out(false);
 169
 170
 171     if ($course->id == SITEID) {
 172         // This course is not a real course.
 173         redirect($CFG->wwwroot .'/');
 174     }
 175
 176     $completion = new completion_info($course);
 177     if ($completion->is_enabled() && ajaxenabled()) {
 178         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 179         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 180         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 181         $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 182
 183         $PAGE->requires->js_init_call('M.core_completion.init');
 184     }
 185
 186     // We are currently keeping the button here from 1.x to help new teachers figure out
 187     // what to do, even though the link also appears in the course admin block.  It also
 188     // means you can back out of a situation where you removed the admin block. :)
 189     if ($PAGE->user_allowed_editing()) {
 190         $buttons = $OUTPUT->edit_button($PAGE->url);
 191         $PAGE->set_button($buttons);
 192     }
 193
 194     $PAGE->set_title(get_string('course') . ': ' . $course->fullname);
 195     $PAGE->set_heading($course->fullname);
 196     echo $OUTPUT->header();
 197
 198     if ($completion->is_enabled() && ajaxenabled()) {
 199         // This value tracks whether there has been a dynamic change to the page.
 200         // It is used so that if a user does this - (a) set some tickmarks, (b)
 201         // go to another page, (c) clicks Back button - the page will
 202         // automatically reload. Otherwise it would start with the wrong tick
 203         // values.
 204         echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 205         echo html_writer::start_tag('div');
 206         echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 207         echo html_writer::end_tag('div');
 208         echo html_writer::end_tag('form');
 209     }
 210
 211     // Course wrapper start.
 212     echo html_writer::start_tag('div', array('class'=>'course-content'));
 213
 214     $modinfo = get_fast_modinfo($COURSE);
 215     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 216     foreach($mods as $modid=>$unused) {
 217         if (!isset($modinfo->cms[$modid])) {
 218             rebuild_course_cache($course->id);
 219             $modinfo = get_fast_modinfo($COURSE);
 220             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 221             break;
 222         }
 223     }
 224
 225     if (!$sections = $modinfo->get_section_info_all()) {   // No sections found
 226         $section = new stdClass;
 227         $section->course = $course->id;   // Create a default section.
 228         $section->section = 0;
 229         $section->visible = 1;
 230         $section->summaryformat = FORMAT_HTML;
 231         $section->id = $DB->insert_record('course_sections', $section);
 232         rebuild_course_cache($course->id);
 233         $modinfo = get_fast_modinfo($COURSE);
 234         if (!$sections = $modinfo->get_section_info_all()) {      // Try again
 235             print_error('cannotcreateorfindstructs', 'error');
 236         }
 237     }
 238
 239     // CAUTION, hacky fundamental variable defintion to follow!
 240     // Note that because of the way course fromats are constructed though
 241     // inclusion we pass parameters around this way..
 242     $displaysection = $section;
 243
 244     // Include the actual course format.
 245     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 246     // Content wrapper end.
 247
 248     echo html_writer::end_tag('div');
 249
 250     // Include course AJAX
 251     if (include_course_ajax($course, $modnamesused)) {
 252         // Add the module chooser
 253         $renderer = $PAGE->get_renderer('core', 'course');
 254         echo $renderer->course_modchooser(get_module_metadata($course, $modnames), $course);
 255     }
 256
 257     echo $OUTPUT->footer();