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     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         $aroles = get_assignable_roles($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     }
  65
  66     //If course is hosted on an external server, redirect to corresponding
  67     //url with appropriate authentication attached as parameter
  68     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  69         include $CFG->dirroot .'/course/externservercourse.php';
  70         if (function_exists('extern_server_course')) {
  71             if ($extern_url = extern_server_course($course)) {
  72                 redirect($extern_url);
  73             }
  74         }
  75     }
  76
  77
  78     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  79
  80     add_to_log($course->id, 'course', 'view', "view.php?id=$course->id", "$course->id");
  81
  82     $course->format = clean_param($course->format, PARAM_ALPHA);
  83     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
  84         $course->format = 'weeks';  // Default format is weeks
  85     }
  86
  87     $PAGE = page_create_object(PAGE_COURSE_VIEW, $course->id);
  88     $pageblocks = blocks_setup($PAGE, BLOCKS_PINNED_BOTH);
  89
  90
  91     if (!isset($USER->editing)) {
  92         $USER->editing = 0;
  93     }
  94     if ($PAGE->user_allowed_editing()) {
  95         if (($edit == 1) and confirm_sesskey()) {
  96             $USER->editing = 1;
  97         } else if (($edit == 0) and confirm_sesskey()) {
  98             $USER->editing = 0;
  99             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 100                 $USER->activitycopy       = false;
 101                 $USER->activitycopycourse = NULL;
 102             }
 103         }
 104
 105         if ($hide && confirm_sesskey()) {
 106             set_section_visible($course->id, $hide, '0');
 107         }
 108
 109         if ($show && confirm_sesskey()) {
 110             set_section_visible($course->id, $show, '1');
 111         }
 112
 113         if (!empty($section)) {
 114             if (!empty($move) and confirm_sesskey()) {
 115                 if (!move_section($course, $section, $move)) {
 116                     notify('An error occurred while moving a section');
 117                 }
 118             }
 119         }
 120     } else {
 121         $USER->editing = 0;
 122     }
 123
 124     $SESSION->fromdiscussion = $CFG->wwwroot .'/course/view.php?id='. $course->id;
 125
 126
 127     if ($course->id == SITEID) {
 128         // This course is not a real course.
 129         redirect($CFG->wwwroot .'/');
 130     }
 131
 132
 133     // AJAX-capable course format?
 134     $useajax = false;
 135     $ajaxformatfile = $CFG->dirroot.'/course/format/'.$course->format.'/ajax.php';
 136     $bodytags = '';
 137
 138     if (empty($CFG->disablecourseajax) and file_exists($ajaxformatfile)) {      // Needs to exist otherwise no AJAX by default
 139
 140         // TODO: stop abusing CFG global here
 141         $CFG->ajaxcapable = false;           // May be overridden later by ajaxformatfile
 142         $CFG->ajaxtestedbrowsers = array();  // May be overridden later by ajaxformatfile
 143
 144         require_once($ajaxformatfile);
 145
 146         if (!empty($USER->editing) && $CFG->ajaxcapable && has_capability('moodle/course:manageactivities', $context)) {
 147                                                              // Course-based switches
 148
 149             if (ajaxenabled($CFG->ajaxtestedbrowsers)) {     // Browser, user and site-based switches
 150
 151                 require_js(array('yui_yahoo',
 152                                  'yui_dom',
 153                                  'yui_event',
 154                                  'yui_dragdrop',
 155                                  'yui_connection',
 156                                  'ajaxcourse_blocks',
 157                                  'ajaxcourse_sections'));
 158
 159                 if (debugging('', DEBUG_DEVELOPER)) {
 160                     require_js(array('yui_logger'));
 161
 162                     $bodytags = 'onload = "javascript:
 163                     show_logger = function() {
 164                         var logreader = new YAHOO.widget.LogReader();
 165                         logreader.newestOnTop = false;
 166                         logreader.setTitle(\'Moodle Debug: YUI Log Console\');
 167                     };
 168                     show_logger();
 169                     "';
 170                 }
 171
 172                 // Okay, global variable alert. VERY UGLY. We need to create
 173                 // this object here before the <blockname>_print_block()
 174                 // function is called, since that function needs to set some
 175                 // stuff in the javascriptportal object.
 176                 $COURSE->javascriptportal = new jsportal();
 177                 $useajax = true;
 178             }
 179         }
 180     }
 181
 182     $CFG->blocksdrag = $useajax;   // this will add a new class to the header so we can style differently
 183
 184
 185     $PAGE->print_header(get_string('course').': %fullname%', NULL, '', $bodytags);
 186     // Course wrapper start.
 187     echo '<div class="course-content">';
 188
 189     $modinfo =& get_fast_modinfo($COURSE);
 190     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 191     foreach($mods as $modid=>$unused) {
 192         if (!isset($modinfo->cms[$modid])) {
 193             rebuild_course_cache($course->id);
 194             $modinfo =& get_fast_modinfo($COURSE);
 195             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 196             break;
 197         }
 198     }
 199
 200     if (! $sections = get_all_sections($course->id)) {   // No sections found
 201         // Double-check to be extra sure
 202         if (! $section = get_record('course_sections', 'course', $course->id, 'section', 0)) {
 203             $section->course = $course->id;   // Create a default section.
 204             $section->section = 0;
 205             $section->visible = 1;
 206             $section->id = insert_record('course_sections', $section);
 207         }
 208         if (! $sections = get_all_sections($course->id) ) {      // Try again
 209             error('Error finding or creating section structures for this course');
 210         }
 211     }
 212
 213     // Include the actual course format.
 214     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 215     // Content wrapper end.
 216     echo "</div>\n\n";
 217
 218
 219     // Use AJAX?
 220     if ($useajax && has_capability('moodle/course:manageactivities', $context)) {
 221         // At the bottom because we want to process sections and activities
 222         // after the relevant html has been generated. We're forced to do this
 223         // because of the way in which lib/ajax/ajaxcourse.js is written.
 224         echo '<script type="text/javascript" ';
 225         echo "src=\"{$CFG->wwwroot}/lib/ajax/ajaxcourse.js\"></script>\n";
 226
 227         $COURSE->javascriptportal->print_javascript($course->id);
 228     }
 229
 230
 231     print_footer(NULL, $course);
 232
 233 ?>