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     $switchrole  = optional_param('switchrole',-1, PARAM_INT);
  20
  21     if (empty($id) && empty($name) && empty($idnumber)) {
  22         print_error('unspecifycourseid', 'error');
  23     }
  24
  25     if (!empty($name)) {
  26         if (! ($course = $DB->get_record('course', array('shortname'=>$name)))) {
  27             print_error('invalidcoursenameshort', 'error');
  28         }
  29     } else if (!empty($idnumber)) {
  30         if (! ($course = $DB->get_record('course', array('idnumber'=>$idnumber)))) {
  31             print_error('invalidcourseid', 'error');
  32         }
  33     } else {
  34         if (! ($course = $DB->get_record('course', array('id'=>$id)))) {
  35             print_error('invalidcourseid', 'error');
  36         }
  37     }
  38
  39     $PAGE->set_url('/course/view.php', array('id' => $course->id)); // Defined here to avoid notices on errors etc
  40
  41     preload_course_contexts($course->id);
  42     if (!$context = get_context_instance(CONTEXT_COURSE, $course->id)) {
  43         print_error('nocontext');
  44     }
  45
  46     // Remove any switched roles before checking login
  47     if ($switchrole == 0 && confirm_sesskey()) {
  48         role_switch($switchrole, $context);
  49     }
  50
  51     require_login($course);
  52
  53     // Switchrole - sanity check in cost-order...
  54     $reset_user_allowed_editing = false;
  55     if ($switchrole > 0 && confirm_sesskey() &&
  56         has_capability('moodle/role:switchroles', $context)) {
  57         // is this role assignable in this context?
  58         // inquiring minds want to know...
  59         $aroles = get_switchable_roles($context);
  60         if (is_array($aroles) && isset($aroles[$switchrole])) {
  61             role_switch($switchrole, $context);
  62             // Double check that this role is allowed here
  63             require_login($course->id);
  64         }
  65         // reset course page state - this prevents some weird problems ;-)
  66         $USER->activitycopy = false;
  67         $USER->activitycopycourse = NULL;
  68         unset($USER->activitycopyname);
  69         unset($SESSION->modform);
  70         $USER->editing = 0;
  71         $reset_user_allowed_editing = true;
  72     }
  73
  74     //If course is hosted on an external server, redirect to corresponding
  75     //url with appropriate authentication attached as parameter
  76     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  77         include $CFG->dirroot .'/course/externservercourse.php';
  78         if (function_exists('extern_server_course')) {
  79             if ($extern_url = extern_server_course($course)) {
  80                 redirect($extern_url);
  81             }
  82         }
  83     }
  84
  85
  86     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  87
  88     add_to_log($course->id, 'course', 'view', "view.php?id=$course->id", "$course->id");
  89
  90     $course->format = clean_param($course->format, PARAM_ALPHA);
  91     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
  92         $course->format = 'weeks';  // Default format is weeks
  93     }
  94
  95     $PAGE->set_pagelayout('course');
  96     $PAGE->set_pagetype('course-view-' . $course->format);
  97     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
  98
  99     if ($reset_user_allowed_editing) {
 100         // ugly hack
 101         unset($PAGE->_user_allowed_editing);
 102     }
 103
 104     if (!isset($USER->editing)) {
 105         $USER->editing = 0;
 106     }
 107     if ($PAGE->user_allowed_editing()) {
 108         if (($edit == 1) and confirm_sesskey()) {
 109             $USER->editing = 1;
 110             redirect($PAGE->url);
 111         } else if (($edit == 0) and confirm_sesskey()) {
 112             $USER->editing = 0;
 113             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 114                 $USER->activitycopy       = false;
 115                 $USER->activitycopycourse = NULL;
 116             }
 117             redirect($PAGE->url);
 118         }
 119
 120         if ($hide && confirm_sesskey()) {
 121             set_section_visible($course->id, $hide, '0');
 122         }
 123
 124         if ($show && confirm_sesskey()) {
 125             set_section_visible($course->id, $show, '1');
 126         }
 127
 128         if (!empty($section)) {
 129             if (!empty($move) and confirm_sesskey()) {
 130                 if (!move_section($course, $section, $move)) {
 131                     echo $OUTPUT->notification('An error occurred while moving a section');
 132                 }
 133                 // Clear the navigation cache at this point so that the affects
 134                 // are seen immediately on the navigation.
 135                 $PAGE->navigation->clear_cache();
 136             }
 137         }
 138     } else {
 139         $USER->editing = 0;
 140     }
 141
 142     $SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;
 143
 144
 145     if ($course->id == SITEID) {
 146         // This course is not a real course.
 147         redirect($CFG->wwwroot .'/');
 148     }
 149
 150     // AJAX-capable course format?
 151     $useajax = false;
 152     $formatajax = course_format_ajax_support($course->format);
 153
 154     if (!empty($CFG->enablecourseajax)
 155             and $formatajax->capable
 156             and !empty($USER->editing)
 157             and ajaxenabled($formatajax->testedbrowsers)
 158             and $PAGE->theme->enablecourseajax
 159             and has_capability('moodle/course:manageactivities', $context)) {
 160         $PAGE->requires->yui2_lib('dragdrop');
 161         $PAGE->requires->yui2_lib('connection');
 162         $PAGE->requires->yui2_lib('selector');
 163         $PAGE->requires->js('/lib/ajax/block_classes.js', true);
 164         $PAGE->requires->js('/lib/ajax/section_classes.js', true);
 165
 166         // Okay, global variable alert. VERY UGLY. We need to create
 167         // this object here before the <blockname>_print_block()
 168         // function is called, since that function needs to set some
 169         // stuff in the javascriptportal object.
 170         $COURSE->javascriptportal = new jsportal();
 171         $useajax = true;
 172     }
 173
 174     $CFG->blocksdrag = $useajax;   // this will add a new class to the header so we can style differently
 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(new moodle_url('/course/view.php', array('id' => $course->id)));
 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 (! $sections = get_all_sections($course->id)) {   // No sections found
 226         // Double-check to be extra sure
 227         if (! $section = $DB->get_record('course_sections', array('course'=>$course->id, 'section'=>0))) {
 228             $section->course = $course->id;   // Create a default section.
 229             $section->section = 0;
 230             $section->visible = 1;
 231             $section->summaryformat = FORMAT_HTML;
 232             $section->id = $DB->insert_record('course_sections', $section);
 233         }
 234         if (! $sections = get_all_sections($course->id) ) {      // Try again
 235             print_error('cannotcreateorfindstructs', 'error');
 236         }
 237     }
 238
 239     // Include the actual course format.
 240     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 241     // Content wrapper end.
 242
 243     echo html_writer::end_tag('div');
 244
 245     // Use AJAX?
 246     if ($useajax && has_capability('moodle/course:manageactivities', $context)) {
 247         // At the bottom because we want to process sections and activities
 248         // after the relevant html has been generated. We're forced to do this
 249         // because of the way in which lib/ajax/ajaxcourse.js is written.
 250         echo html_writer::script(false, new moodle_url('/lib/ajax/ajaxcourse.js'));
 251         $COURSE->javascriptportal->print_javascript($course->id);
 252     }
 253
 254
 255     echo $OUTPUT->footer();
 256
 257