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.'/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     $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);
  20
  21     $params = array();
  22     if (!empty($name)) {
  23         $params = array('shortname' => $name);
  24     } else if (!empty($idnumber)) {
  25         $params = array('idnumber' => $idnumber);
  26     } else if (!empty($id)) {
  27         $params = array('id' => $id);
  28     }else {
  29         print_error('unspecifycourseid', 'error');
  30     }
  31
  32     $course = $DB->get_record('course', $params, '*', MUST_EXIST);
  33
  34     $urlparams = array('id' => $course->id);
  35     if ($section) {
  36         $urlparams['section'] = $section;
  37     }
  38
  39     $PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc
  40
  41     // Prevent caching of this page to stop confusion when changing page after making AJAX changes
  42     $PAGE->set_cacheable(false);
  43
  44     preload_course_contexts($course->id);
  45     $context = context_course::instance($course->id, MUST_EXIST);
  46
  47     // Remove any switched roles before checking login
  48     if ($switchrole == 0 && confirm_sesskey()) {
  49         role_switch($switchrole, $context);
  50     }
  51
  52     require_login($course);
  53
  54     // Switchrole - sanity check in cost-order...
  55     $reset_user_allowed_editing = false;
  56     if ($switchrole > 0 && confirm_sesskey() &&
  57         has_capability('moodle/role:switchroles', $context)) {
  58         // is this role assignable in this context?
  59         // inquiring minds want to know...
  60         $aroles = get_switchable_roles($context);
  61         if (is_array($aroles) && isset($aroles[$switchrole])) {
  62             role_switch($switchrole, $context);
  63             // Double check that this role is allowed here
  64             require_login($course);
  65         }
  66         // reset course page state - this prevents some weird problems ;-)
  67         $USER->activitycopy = false;
  68         $USER->activitycopycourse = NULL;
  69         unset($USER->activitycopyname);
  70         unset($SESSION->modform);
  71         $USER->editing = 0;
  72         $reset_user_allowed_editing = true;
  73     }
  74
  75     //If course is hosted on an external server, redirect to corresponding
  76     //url with appropriate authentication attached as parameter
  77     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  78         include $CFG->dirroot .'/course/externservercourse.php';
  79         if (function_exists('extern_server_course')) {
  80             if ($extern_url = extern_server_course($course)) {
  81                 redirect($extern_url);
  82             }
  83         }
  84     }
  85
  86
  87     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  88
  89     //TODO: danp do we need different urls?
  90     add_to_log($course->id, 'course', 'view', "view.php?id=$course->id", "$course->id");
  91
  92     $course->format = clean_param($course->format, PARAM_ALPHA);
  93     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
  94         $course->format = 'weeks';  // Default format is weeks
  95     }
  96
  97     $PAGE->set_pagelayout('course');
  98     $PAGE->set_pagetype('course-view-' . $course->format);
  99     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 100
 101     if ($reset_user_allowed_editing) {
 102         // ugly hack
 103         unset($PAGE->_user_allowed_editing);
 104     }
 105
 106     if (!isset($USER->editing)) {
 107         $USER->editing = 0;
 108     }
 109     if ($PAGE->user_allowed_editing()) {
 110         if (($edit == 1) and confirm_sesskey()) {
 111             $USER->editing = 1;
 112             // Redirect to site root if Editing is toggled on frontpage
 113             if ($course->id == SITEID) {
 114                 redirect($CFG->wwwroot .'/?redirect=0');
 115             } else {
 116                 redirect($PAGE->url);
 117             }
 118         } else if (($edit == 0) and confirm_sesskey()) {
 119             $USER->editing = 0;
 120             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 121                 $USER->activitycopy       = false;
 122                 $USER->activitycopycourse = NULL;
 123             }
 124             // Redirect to site root if Editing is toggled on frontpage
 125             if ($course->id == SITEID) {
 126                 redirect($CFG->wwwroot .'/?redirect=0');
 127             } else {
 128                 redirect($PAGE->url);
 129             }
 130         }
 131
 132         if (has_capability('moodle/course:update', $context)) {
 133             if ($hide && confirm_sesskey()) {
 134                 set_section_visible($course->id, $hide, '0');
 135                 redirect($PAGE->url);
 136             }
 137
 138             if ($show && confirm_sesskey()) {
 139                 set_section_visible($course->id, $show, '1');
 140                 redirect($PAGE->url);
 141             }
 142
 143             if (!empty($section)) {
 144                 if (!empty($move) and confirm_sesskey()) {
 145                     if (move_section($course, $section, $move)) {
 146                         if ($course->id == SITEID) {
 147                             redirect($CFG->wwwroot . '/?redirect=0');
 148                         } else {
 149                             redirect(course_get_url($course));
 150                         }
 151                     } else {
 152                         echo $OUTPUT->notification('An error occurred while moving a section');
 153                     }
 154                 }
 155             }
 156         }
 157     } else {
 158         $USER->editing = 0;
 159     }
 160
 161     $SESSION->fromdiscussion = $PAGE->url->out(false);
 162
 163
 164     if ($course->id == SITEID) {
 165         // This course is not a real course.
 166         redirect($CFG->wwwroot .'/');
 167     }
 168
 169     $completion = new completion_info($course);
 170     if ($completion->is_enabled() && ajaxenabled()) {
 171         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 172         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 173         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 174         $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 175
 176         $PAGE->requires->js_init_call('M.core_completion.init');
 177     }
 178
 179     // We are currently keeping the button here from 1.x to help new teachers figure out
 180     // what to do, even though the link also appears in the course admin block.  It also
 181     // means you can back out of a situation where you removed the admin block. :)
 182     if ($PAGE->user_allowed_editing()) {
 183         $buttons = $OUTPUT->edit_button($PAGE->url);
 184         $PAGE->set_button($buttons);
 185     }
 186
 187     $PAGE->set_title(get_string('course') . ': ' . $course->fullname);
 188     $PAGE->set_heading($course->fullname);
 189     echo $OUTPUT->header();
 190
 191     if ($completion->is_enabled() && ajaxenabled()) {
 192         // This value tracks whether there has been a dynamic change to the page.
 193         // It is used so that if a user does this - (a) set some tickmarks, (b)
 194         // go to another page, (c) clicks Back button - the page will
 195         // automatically reload. Otherwise it would start with the wrong tick
 196         // values.
 197         echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 198         echo html_writer::start_tag('div');
 199         echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 200         echo html_writer::end_tag('div');
 201         echo html_writer::end_tag('form');
 202     }
 203
 204     // Course wrapper start.
 205     echo html_writer::start_tag('div', array('class'=>'course-content'));
 206
 207     $modinfo = get_fast_modinfo($COURSE);
 208     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 209     foreach($mods as $modid=>$unused) {
 210         if (!isset($modinfo->cms[$modid])) {
 211             rebuild_course_cache($course->id);
 212             $modinfo = get_fast_modinfo($COURSE);
 213             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 214             break;
 215         }
 216     }
 217
 218     if (! $sections = get_all_sections($course->id)) {   // No sections found
 219         // Double-check to be extra sure
 220         if (! $section = $DB->get_record('course_sections', array('course'=>$course->id, 'section'=>0))) {
 221             $section->course = $course->id;   // Create a default section.
 222             $section->section = 0;
 223             $section->visible = 1;
 224             $section->summaryformat = FORMAT_HTML;
 225             $section->id = $DB->insert_record('course_sections', $section);
 226         }
 227         if (! $sections = get_all_sections($course->id) ) {      // Try again
 228             print_error('cannotcreateorfindstructs', 'error');
 229         }
 230     }
 231
 232     // CAUTION, hacky fundamental variable defintion to follow!
 233     // Note that because of the way course fromats are constructed though
 234     // inclusion we pass parameters around this way..
 235     $displaysection = $section;
 236
 237     // Include the actual course format.
 238     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 239     // Content wrapper end.
 240
 241     echo html_writer::end_tag('div');
 242
 243     // Include the command toolbox YUI module
 244     include_course_ajax($course, $modnamesused, $modnames);
 245
 246     echo $OUTPUT->footer();