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   1  <?php // $Id: view.php,v 1.106.2.4 2008/04/25 14:09:07 skodak Exp $
   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  ?>