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
   9     $id          = optional_param('id', 0, PARAM_INT);
  10     $name        = optional_param('name', '', PARAM_RAW);
  11     $edit        = optional_param('edit', -1, PARAM_BOOL);
  12     $hide        = optional_param('hide', 0, PARAM_INT);
  13     $show        = optional_param('show', 0, PARAM_INT);
  14     $idnumber    = optional_param('idnumber', '', PARAM_RAW);
  15     $section     = optional_param('section', 0, PARAM_INT);
  16     $move        = optional_param('move', 0, PARAM_INT);
  17     $marker      = optional_param('marker',-1 , PARAM_INT);
  18     $switchrole  = optional_param('switchrole',-1, PARAM_INT);
  19
  20     if (empty($id) && empty($name) && empty($idnumber)) {
  21         print_error('unspecifycourseid', 'error');
  22     }
  23
  24     if (!empty($name)) {
  25         if (! ($course = $DB->get_record('course', array('shortname'=>$name)))) {
  26             print_error('invalidcoursenameshort', 'error');
  27         }
  28     } else if (!empty($idnumber)) {
  29         if (! ($course = $DB->get_record('course', array('idnumber'=>$idnumber)))) {
  30             print_error('invalidcourseid', 'error');
  31         }
  32     } else {
  33         if (! ($course = $DB->get_record('course', array('id'=>$id)))) {
  34             print_error('invalidcourseid', 'error');
  35         }
  36     }
  37
  38     $PAGE->set_url('/course/view.php', array('id' => $course->id)); // Defined here to avoid notices on errors etc
  39
  40     preload_course_contexts($course->id);
  41     if (!$context = get_context_instance(CONTEXT_COURSE, $course->id)) {
  42         print_error('nocontext');
  43     }
  44
  45     // Remove any switched roles before checking login
  46     if ($switchrole == 0 && confirm_sesskey()) {
  47         role_switch($switchrole, $context);
  48     }
  49
  50     require_login($course);
  51
  52     // Switchrole - sanity check in cost-order...
  53     $reset_user_allowed_editing = false;
  54     if ($switchrole > 0 && confirm_sesskey() &&
  55         has_capability('moodle/role:switchroles', $context)) {
  56         // is this role assignable in this context?
  57         // inquiring minds want to know...
  58         $aroles = get_switchable_roles($context);
  59         if (is_array($aroles) && isset($aroles[$switchrole])) {
  60             role_switch($switchrole, $context);
  61             // Double check that this role is allowed here
  62             require_login($course->id);
  63         }
  64         // reset course page state - this prevents some weird problems ;-)
  65         $USER->activitycopy = false;
  66         $USER->activitycopycourse = NULL;
  67         unset($USER->activitycopyname);
  68         unset($SESSION->modform);
  69         $USER->editing = 0;
  70         $reset_user_allowed_editing = true;
  71     }
  72
  73     //If course is hosted on an external server, redirect to corresponding
  74     //url with appropriate authentication attached as parameter
  75     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  76         include $CFG->dirroot .'/course/externservercourse.php';
  77         if (function_exists('extern_server_course')) {
  78             if ($extern_url = extern_server_course($course)) {
  79                 redirect($extern_url);
  80             }
  81         }
  82     }
  83
  84
  85     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  86
  87     add_to_log($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             $USER->editing = 1;
 109             redirect($PAGE->url);
 110         } else if (($edit == 0) and confirm_sesskey()) {
 111             $USER->editing = 0;
 112             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 113                 $USER->activitycopy       = false;
 114                 $USER->activitycopycourse = NULL;
 115             }
 116             redirect($PAGE->url);
 117         }
 118
 119         if ($hide && confirm_sesskey()) {
 120             set_section_visible($course->id, $hide, '0');
 121         }
 122
 123         if ($show && confirm_sesskey()) {
 124             set_section_visible($course->id, $show, '1');
 125         }
 126
 127         if (!empty($section)) {
 128             if (!empty($move) and confirm_sesskey()) {
 129                 if (!move_section($course, $section, $move)) {
 130                     echo $OUTPUT->notification('An error occurred while moving a section');
 131                 }
 132             }
 133         }
 134     } else {
 135         $USER->editing = 0;
 136     }
 137
 138     $SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;
 139
 140
 141     if ($course->id == SITEID) {
 142         // This course is not a real course.
 143         redirect($CFG->wwwroot .'/');
 144     }
 145
 146
 147     // AJAX-capable course format?
 148     $useajax = false;
 149     $ajaxformatfile = $CFG->dirroot.'/course/format/'.$course->format.'/ajax.php';
 150     $bodytags = '';
 151
 152     if (empty($CFG->disablecourseajax) and file_exists($ajaxformatfile)) {      // Needs to exist otherwise no AJAX by default
 153
 154         // TODO: stop abusing CFG global here
 155         $CFG->ajaxcapable = false;           // May be overridden later by ajaxformatfile
 156         $CFG->ajaxtestedbrowsers = array();  // May be overridden later by ajaxformatfile
 157
 158         require_once($ajaxformatfile);
 159
 160         if (!empty($USER->editing) && $CFG->ajaxcapable && has_capability('moodle/course:manageactivities', $context)) {
 161                                                              // Course-based switches
 162
 163             if (ajaxenabled($CFG->ajaxtestedbrowsers)) {     // Browser, user and site-based switches
 164                 $PAGE->requires->yui2_lib('dragdrop');
 165                 $PAGE->requires->yui2_lib('connection');
 166                 $PAGE->requires->yui2_lib('selector');
 167                 $PAGE->requires->js('/lib/ajax/block_classes.js', true);
 168                 $PAGE->requires->js('/lib/ajax/section_classes.js', true);
 169
 170                 // Okay, global variable alert. VERY UGLY. We need to create
 171                 // this object here before the <blockname>_print_block()
 172                 // function is called, since that function needs to set some
 173                 // stuff in the javascriptportal object.
 174                 $COURSE->javascriptportal = new jsportal();
 175                 $useajax = true;
 176             }
 177         }
 178     }
 179
 180     $CFG->blocksdrag = $useajax;   // this will add a new class to the header so we can style differently
 181
 182     $completion = new completion_info($course);
 183     if ($completion->is_enabled() && ajaxenabled()) {
 184         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 185         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 186         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 187         $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 188
 189         $PAGE->requires->js_init_call('M.core_completion.init');
 190     }
 191
 192     // We are currently keeping the button here from 1.x to help new teachers figure out
 193     // what to do, even though the link also appears in the course admin block.  It also
 194     // means you can back out of a situation where you removed the admin block. :)
 195     if ($PAGE->user_allowed_editing()) {
 196         $buttons = $OUTPUT->edit_button(new moodle_url('/course/view.php', array('id' => $course->id)));
 197         $PAGE->set_button($buttons);
 198     }
 199
 200     $PAGE->set_title(get_string('course') . ': ' . $course->fullname);
 201     $PAGE->set_heading($course->fullname);
 202     echo $OUTPUT->header();
 203
 204     if ($completion->is_enabled() && ajaxenabled()) {
 205         // This value tracks whether there has been a dynamic change to the page.
 206         // It is used so that if a user does this - (a) set some tickmarks, (b)
 207         // go to another page, (c) clicks Back button - the page will
 208         // automatically reload. Otherwise it would start with the wrong tick
 209         // values.
 210         echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 211         echo html_writer::start_tag('div');
 212         echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 213         echo html_writer::end_tag('div');
 214         echo html_writer::end_tag('form');
 215     }
 216
 217     // Course wrapper start.
 218     echo html_writer::start_tag('div', array('class'=>'course-content'));
 219
 220     $modinfo =& get_fast_modinfo($COURSE);
 221     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 222     foreach($mods as $modid=>$unused) {
 223         if (!isset($modinfo->cms[$modid])) {
 224             rebuild_course_cache($course->id);
 225             $modinfo =& get_fast_modinfo($COURSE);
 226             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 227             break;
 228         }
 229     }
 230
 231     if (! $sections = get_all_sections($course->id)) {   // No sections found
 232         // Double-check to be extra sure
 233         if (! $section = $DB->get_record('course_sections', array('course'=>$course->id, 'section'=>0))) {
 234             $section->course = $course->id;   // Create a default section.
 235             $section->section = 0;
 236             $section->visible = 1;
 237             $section->summaryformat = FORMAT_HTML;
 238             $section->id = $DB->insert_record('course_sections', $section);
 239         }
 240         if (! $sections = get_all_sections($course->id) ) {      // Try again
 241             print_error('cannotcreateorfindstructs', 'error');
 242         }
 243     }
 244
 245     // Include the actual course format.
 246     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 247     // Content wrapper end.
 248
 249     echo html_writer::end_tag('div');
 250
 251     // Use AJAX?
 252     if ($useajax && has_capability('moodle/course:manageactivities', $context)) {
 253         // At the bottom because we want to process sections and activities
 254         // after the relevant html has been generated. We're forced to do this
 255         // because of the way in which lib/ajax/ajaxcourse.js is written.
 256         echo html_writer::script(false, new moodle_url('/lib/ajax/ajaxcourse.js'));
 257         $COURSE->javascriptportal->print_javascript($course->id);
 258     }
 259
 260
 261     echo $OUTPUT->footer();
 262
 263