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', $id)) ) {
  38             error('Invalid course id');
  39         }
  40     }
  41
  42     if (!$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         $aroles = get_assignable_roles($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 = page_create_object(PAGE_COURSE_VIEW, $course->id);
  96     $pageblocks = blocks_setup($PAGE, BLOCKS_PINNED_BOTH);
  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             $USER->editing = 1;
 109         } else if (($edit == 0) and confirm_sesskey()) {
 110             $USER->editing = 0;
 111             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 112                 $USER->activitycopy       = false;
 113                 $USER->activitycopycourse = NULL;
 114             }
 115         }
 116
 117         if ($hide && confirm_sesskey()) {
 118             set_section_visible($course->id, $hide, '0');
 119         }
 120
 121         if ($show && confirm_sesskey()) {
 122             set_section_visible($course->id, $show, '1');
 123         }
 124
 125         if (!empty($section)) {
 126             if (!empty($move) and confirm_sesskey()) {
 127                 if (!move_section($course, $section, $move)) {
 128                     notify('An error occurred while moving a section');
 129                 }
 130             }
 131         }
 132     } else {
 133         $USER->editing = 0;
 134     }
 135
 136     $SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;
 137
 138
 139     if ($course->id == SITEID) {
 140         // This course is not a real course.
 141         redirect($CFG->wwwroot .'/');
 142     }
 143
 144
 145     // AJAX-capable course format?
 146     $useajax = false;
 147     $ajaxformatfile = $CFG->dirroot.'/course/format/'.$course->format.'/ajax.php';
 148     $bodytags = '';
 149
 150     if (empty($CFG->disablecourseajax) and file_exists($ajaxformatfile)) {      // Needs to exist otherwise no AJAX by default
 151
 152         // TODO: stop abusing CFG global here
 153         $CFG->ajaxcapable = false;           // May be overridden later by ajaxformatfile
 154         $CFG->ajaxtestedbrowsers = array();  // May be overridden later by ajaxformatfile
 155
 156         require_once($ajaxformatfile);
 157
 158         if (!empty($USER->editing) && $CFG->ajaxcapable && has_capability('moodle/course:manageactivities', $context)) {
 159                                                              // Course-based switches
 160
 161             if (ajaxenabled($CFG->ajaxtestedbrowsers)) {     // Browser, user and site-based switches
 162
 163                 require_js(array('yui_yahoo',
 164                                  'yui_dom',
 165                                  'yui_event',
 166                                  'yui_dragdrop',
 167                                  'yui_connection',
 168                                  'ajaxcourse_blocks',
 169                                  'ajaxcourse_sections'));
 170
 171                 if (debugging('', DEBUG_DEVELOPER)) {
 172                     require_js(array('yui_logger'));
 173
 174                     $bodytags = 'onload = "javascript:
 175                     show_logger = function() {
 176                         var logreader = new YAHOO.widget.LogReader();
 177                         logreader.newestOnTop = false;
 178                         logreader.setTitle(\'Moodle Debug: YUI Log Console\');
 179                     };
 180                     show_logger();
 181                     "';
 182                 }
 183
 184                 // Okay, global variable alert. VERY UGLY. We need to create
 185                 // this object here before the <blockname>_print_block()
 186                 // function is called, since that function needs to set some
 187                 // stuff in the javascriptportal object.
 188                 $COURSE->javascriptportal = new jsportal();
 189                 $useajax = true;
 190             }
 191         }
 192     }
 193
 194     $CFG->blocksdrag = $useajax;   // this will add a new class to the header so we can style differently
 195
 196
 197     $PAGE->print_header(get_string('course').': %fullname%', NULL, '', $bodytags);
 198     // Course wrapper start.
 199     echo '<div class="course-content">';
 200
 201     $modinfo =& get_fast_modinfo($COURSE);
 202     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 203     foreach($mods as $modid=>$unused) {
 204         if (!isset($modinfo->cms[$modid])) {
 205             rebuild_course_cache($course->id);
 206             $modinfo =& get_fast_modinfo($COURSE);
 207             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 208             break;
 209         }
 210     }
 211
 212     if (! $sections = get_all_sections($course->id)) {   // No sections found
 213         // Double-check to be extra sure
 214         if (! $section = get_record('course_sections', 'course', $course->id, 'section', 0)) {
 215             $section->course = $course->id;   // Create a default section.
 216             $section->section = 0;
 217             $section->visible = 1;
 218             $section->id = insert_record('course_sections', $section);
 219         }
 220         if (! $sections = get_all_sections($course->id) ) {      // Try again
 221             error('Error finding or creating section structures for this course');
 222         }
 223     }
 224
 225     // Include the actual course format.
 226     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 227     // Content wrapper end.
 228     echo "</div>\n\n";
 229
 230
 231     // Use AJAX?
 232     if ($useajax && has_capability('moodle/course:manageactivities', $context)) {
 233         // At the bottom because we want to process sections and activities
 234         // after the relevant html has been generated. We're forced to do this
 235         // because of the way in which lib/ajax/ajaxcourse.js is written.
 236         echo '<script type="text/javascript" ';
 237         echo "src=\"{$CFG->wwwroot}/lib/ajax/ajaxcourse.js\"></script>\n";
 238
 239         $COURSE->javascriptportal->print_javascript($course->id);
 240     }
 241
 242
 243     print_footer(NULL, $course);
 244
 245 ?>