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