course/view.php

   1 <?php // $Id$
   2
   3 //  Display the course home page.
   4
   5     require_once('../config.php');
   6     require_once('lib.php');
   7     require_once($CFG->libdir.'/blocklib.php');
   8     require_once($CFG->libdir.'/ajax/ajaxlib.php');
   9     require_once($CFG->dirroot.'/mod/forum/lib.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     $switchrole  = optional_param('switchrole',-1, PARAM_INT);
  21
  22
  23
  24     if (empty($id) && empty($name) && empty($idnumber)) {
  25         error("Must specify course id, short name or idnumber");
  26     }
  27
  28     if (!empty($name)) {
  29         if (! ($course = get_record('course', 'shortname', $name)) ) {
  30             error('Invalid short course name');
  31         }
  32     } else if (!empty($idnumber)) {
  33         if (! ($course = get_record('course', 'idnumber', $idnumber)) ) {
  34             error('Invalid course idnumber');
  35         }
  36     } else {
  37         if (! ($course = get_record('course', 'id', $id)) ) {
  38             error('Invalid course id');
  39         }
  40     }
  41
  42     preload_course_contexts($course->id);
  43     if (!$context = get_context_instance(CONTEXT_COURSE, $course->id)) {
  44         print_error('nocontext');
  45     }
  46
  47     // Remove any switched roles before checking login
  48     if ($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         $aroles = get_assignable_roles_for_switchrole($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->id);
  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 $USER
  88
  89     add_to_log($course->id, 'course', 'view', "view.php?id=$course->id", "$course->id");
  90
  91     $course->format = clean_param($course->format, PARAM_ALPHA);
  92     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
  93         $course->format = 'weeks';  // Default format is weeks
  94     }
  95
  96     $PAGE = page_create_object(PAGE_COURSE_VIEW, $course->id);
  97     $pageblocks = blocks_setup($PAGE, BLOCKS_PINNED_BOTH);
  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             $USER->editing = 1;
 110         } else if (($edit == 0) and confirm_sesskey()) {
 111             $USER->editing = 0;
 112             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 113                 $USER->activitycopy       = false;
 114                 $USER->activitycopycourse = NULL;
 115             }
 116         }
 117
 118         if ($hide && confirm_sesskey()) {
 119             set_section_visible($course->id, $hide, '0');
 120         }
 121
 122         if ($show && confirm_sesskey()) {
 123             set_section_visible($course->id, $show, '1');
 124         }
 125
 126         if (!empty($section)) {
 127             if (!empty($move) and confirm_sesskey()) {
 128                 if (!move_section($course, $section, $move)) {
 129                     notify('An error occurred while moving a section');
 130                 }
 131             }
 132         }
 133     } else {
 134         $USER->editing = 0;
 135     }
 136
 137     $SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;
 138
 139
 140     if ($course->id == SITEID) {
 141         // This course is not a real course.
 142         redirect($CFG->wwwroot .'/');
 143     }
 144
 145
 146     // AJAX-capable course format?
 147     $useajax = false;
 148     $ajaxformatfile = $CFG->dirroot.'/course/format/'.$course->format.'/ajax.php';
 149     $bodytags = '';
 150
 151     if (empty($CFG->disablecourseajax) and file_exists($ajaxformatfile)) {      // Needs to exist otherwise no AJAX by default
 152
 153         // TODO: stop abusing CFG global here
 154         $CFG->ajaxcapable = false;           // May be overridden later by ajaxformatfile
 155         $CFG->ajaxtestedbrowsers = array();  // May be overridden later by ajaxformatfile
 156
 157         require_once($ajaxformatfile);
 158
 159         if (!empty($USER->editing) && $CFG->ajaxcapable && has_capability('moodle/course:manageactivities', $context)) {
 160                                                              // Course-based switches
 161
 162             if (ajaxenabled($CFG->ajaxtestedbrowsers)) {     // Browser, user and site-based switches
 163
 164                 require_js(array('yui_yahoo',
 165                                  'yui_dom',
 166                                  'yui_event',
 167                                  'yui_dragdrop',
 168                                  'yui_connection',
 169                                  'yui_selector',
 170                                  'yui_element',
 171                                  'ajaxcourse_blocks',
 172                                  'ajaxcourse_sections'));
 173
 174                 if (debugging('', DEBUG_DEVELOPER)) {
 175                     require_js(array('yui_logger'));
 176
 177                     $bodytags = 'onload = "javascript:
 178                     show_logger = function() {
 179                         var logreader = new YAHOO.widget.LogReader();
 180                         logreader.newestOnTop = false;
 181                         logreader.setTitle(\'Moodle Debug: YUI Log Console\');
 182                     };
 183                     show_logger();
 184                     "';
 185                 }
 186
 187                 // Okay, global variable alert. VERY UGLY. We need to create
 188                 // this object here before the <blockname>_print_block()
 189                 // function is called, since that function needs to set some
 190                 // stuff in the javascriptportal object.
 191                 $COURSE->javascriptportal = new jsportal();
 192                 $useajax = true;
 193             }
 194         }
 195     }
 196
 197     $CFG->blocksdrag = $useajax;   // this will add a new class to the header so we can style differently
 198
 199
 200     $PAGE->print_header(get_string('course').': %fullname%', NULL, '', $bodytags);
 201     // Course wrapper start.
 202     echo '<div 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 = get_record('course_sections', 'course', $course->id, 'section', 0)) {
 218             $section->course = $course->id;   // Create a default section.
 219             $section->section = 0;
 220             $section->visible = 1;
 221             $section->id = insert_record('course_sections', $section);
 222         }
 223         if (! $sections = get_all_sections($course->id) ) {      // Try again
 224             error('Error finding or creating section structures for this course');
 225         }
 226     }
 227
 228     // Include the actual course format.
 229     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 230     // Content wrapper end.
 231     echo "</div>\n\n";
 232
 233
 234     // Use AJAX?
 235     if ($useajax && has_capability('moodle/course:manageactivities', $context)) {
 236         // At the bottom because we want to process sections and activities
 237         // after the relevant html has been generated. We're forced to do this
 238         // because of the way in which lib/ajax/ajaxcourse.js is written.
 239         echo '<script type="text/javascript" ';
 240         echo "src=\"{$CFG->wwwroot}/lib/ajax/ajaxcourse.js\"></script>\n";
 241
 242         $COURSE->javascriptportal->print_javascript($course->id);
 243     }
 244
 245
 246     print_footer(NULL, $course);
 247
 248 ?>