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   1  <?php
   2  
   3  //  Display the course home page.
   4  
   5      require_once('../config.php');
   6      require_once ('lib.php');
   7      require_once($CFG->libdir.'/conditionlib.php');
   8      require_once($CFG->libdir.'/completionlib.php');
   9  
  10      $id          = optional_param('id', 0, PARAM_INT);
  11      $name        = optional_param('name', '', PARAM_RAW);
  12      $edit        = optional_param('edit', -1, PARAM_BOOL);
  13      $hide        = optional_param('hide', 0, PARAM_INT);
  14      $show        = optional_param('show', 0, PARAM_INT);
  15      $idnumber    = optional_param('idnumber', '', PARAM_RAW);
  16      $sectionid   = optional_param('sectionid', 0, PARAM_INT);
  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); // Deprecated, use course/switchrole.php instead.
  21      $modchooser  = optional_param('modchooser', -1, PARAM_BOOL);
  22      $return      = optional_param('return', 0, PARAM_LOCALURL);
  23  
  24      $params = array();
  25      if (!empty($name)) {
  26          $params = array('shortname' => $name);
  27      } else if (!empty($idnumber)) {
  28          $params = array('idnumber' => $idnumber);
  29      } else if (!empty($id)) {
  30          $params = array('id' => $id);
  31      }else {
  32          print_error('unspecifycourseid', 'error');
  33      }
  34  
  35      $course = $DB->get_record('course', $params, '*', MUST_EXIST);
  36  
  37      $urlparams = array('id' => $course->id);
  38  
  39      // Sectionid should get priority over section number
  40      if ($sectionid) {
  41          $section = $DB->get_field('course_sections', 'section', array('id' => $sectionid, 'course' => $course->id), MUST_EXIST);
  42      }
  43      if ($section) {
  44          $urlparams['section'] = $section;
  45      }
  46  
  47      $PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc
  48  
  49      // Prevent caching of this page to stop confusion when changing page after making AJAX changes
  50      $PAGE->set_cacheable(false);
  51  
  52      context_helper::preload_course($course->id);
  53      $context = context_course::instance($course->id, MUST_EXIST);
  54  
  55      // Remove any switched roles before checking login
  56      if ($switchrole == 0 && confirm_sesskey()) {
  57          role_switch($switchrole, $context);
  58      }
  59  
  60      require_login($course);
  61  
  62      // Switchrole - sanity check in cost-order...
  63      $reset_user_allowed_editing = false;
  64      if ($switchrole > 0 && confirm_sesskey() &&
  65          has_capability('moodle/role:switchroles', $context)) {
  66          // is this role assignable in this context?
  67          // inquiring minds want to know...
  68          $aroles = get_switchable_roles($context);
  69          if (is_array($aroles) && isset($aroles[$switchrole])) {
  70              role_switch($switchrole, $context);
  71              // Double check that this role is allowed here
  72              require_login($course);
  73          }
  74          // reset course page state - this prevents some weird problems ;-)
  75          $USER->activitycopy = false;
  76          $USER->activitycopycourse = NULL;
  77          unset($USER->activitycopyname);
  78          unset($SESSION->modform);
  79          $USER->editing = 0;
  80          $reset_user_allowed_editing = true;
  81      }
  82  
  83      //If course is hosted on an external server, redirect to corresponding
  84      //url with appropriate authentication attached as parameter
  85      if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  86          include $CFG->dirroot .'/course/externservercourse.php';
  87          if (function_exists('extern_server_course')) {
  88              if ($extern_url = extern_server_course($course)) {
  89                  redirect($extern_url);
  90              }
  91          }
  92      }
  93  
  94  
  95      require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  96  
  97      // Must set layout before gettting section info. See MDL-47555.
  98      $PAGE->set_pagelayout('course');
  99  
 100      if ($section and $section > 0) {
 101  
 102          // Get section details and check it exists.
 103          $modinfo = get_fast_modinfo($course);
 104          $coursesections = $modinfo->get_section_info($section, MUST_EXIST);
 105  
 106          // Check user is allowed to see it.
 107          if (!$coursesections->uservisible) {
 108              // Note: We actually already know they don't have this capability
 109              // or uservisible would have been true; this is just to get the
 110              // correct error message shown.
 111              require_capability('moodle/course:viewhiddensections', $context);
 112          }
 113      }
 114  
 115      // Fix course format if it is no longer installed
 116      $course->format = course_get_format($course)->get_format();
 117  
 118      $PAGE->set_pagetype('course-view-' . $course->format);
 119      $PAGE->set_other_editing_capability('moodle/course:update');
 120      $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 121      $PAGE->set_other_editing_capability('moodle/course:activityvisibility');
 122      if (course_format_uses_sections($course->format)) {
 123          $PAGE->set_other_editing_capability('moodle/course:sectionvisibility');
 124          $PAGE->set_other_editing_capability('moodle/course:movesections');
 125      }
 126  
 127      // Preload course format renderer before output starts.
 128      // This is a little hacky but necessary since
 129      // format.php is not included until after output starts
 130      if (file_exists($CFG->dirroot.'/course/format/'.$course->format.'/renderer.php')) {
 131          require_once($CFG->dirroot.'/course/format/'.$course->format.'/renderer.php');
 132          if (class_exists('format_'.$course->format.'_renderer')) {
 133              // call get_renderer only if renderer is defined in format plugin
 134              // otherwise an exception would be thrown
 135              $PAGE->get_renderer('format_'. $course->format);
 136          }
 137      }
 138  
 139      if ($reset_user_allowed_editing) {
 140          // ugly hack
 141          unset($PAGE->_user_allowed_editing);
 142      }
 143  
 144      if (!isset($USER->editing)) {
 145          $USER->editing = 0;
 146      }
 147      if ($PAGE->user_allowed_editing()) {
 148          if (($edit == 1) and confirm_sesskey()) {
 149              $USER->editing = 1;
 150              // Redirect to site root if Editing is toggled on frontpage
 151              if ($course->id == SITEID) {
 152                  redirect($CFG->wwwroot .'/?redirect=0');
 153              } else if (!empty($return)) {
 154                  redirect($CFG->wwwroot . $return);
 155              } else {
 156                  $url = new moodle_url($PAGE->url, array('notifyeditingon' => 1));
 157                  redirect($url);
 158              }
 159          } else if (($edit == 0) and confirm_sesskey()) {
 160              $USER->editing = 0;
 161              if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 162                  $USER->activitycopy       = false;
 163                  $USER->activitycopycourse = NULL;
 164              }
 165              // Redirect to site root if Editing is toggled on frontpage
 166              if ($course->id == SITEID) {
 167                  redirect($CFG->wwwroot .'/?redirect=0');
 168              } else if (!empty($return)) {
 169                  redirect($CFG->wwwroot . $return);
 170              } else {
 171                  redirect($PAGE->url);
 172              }
 173          }
 174          if (($modchooser == 1) && confirm_sesskey()) {
 175              set_user_preference('usemodchooser', $modchooser);
 176          } else if (($modchooser == 0) && confirm_sesskey()) {
 177              set_user_preference('usemodchooser', $modchooser);
 178          }
 179  
 180          if (has_capability('moodle/course:sectionvisibility', $context)) {
 181              if ($hide && confirm_sesskey()) {
 182                  set_section_visible($course->id, $hide, '0');
 183                  redirect($PAGE->url);
 184              }
 185  
 186              if ($show && confirm_sesskey()) {
 187                  set_section_visible($course->id, $show, '1');
 188                  redirect($PAGE->url);
 189              }
 190          }
 191  
 192          if (!empty($section) && !empty($move) &&
 193                  has_capability('moodle/course:movesections', $context) && confirm_sesskey()) {
 194              $destsection = $section + $move;
 195              if (move_section_to($course, $section, $destsection)) {
 196                  if ($course->id == SITEID) {
 197                      redirect($CFG->wwwroot . '/?redirect=0');
 198                  } else {
 199                      redirect(course_get_url($course));
 200                  }
 201              } else {
 202                  echo $OUTPUT->notification('An error occurred while moving a section');
 203              }
 204          }
 205      } else {
 206          $USER->editing = 0;
 207      }
 208  
 209      $SESSION->fromdiscussion = $PAGE->url->out(false);
 210  
 211  
 212      if ($course->id == SITEID) {
 213          // This course is not a real course.
 214          redirect($CFG->wwwroot .'/');
 215      }
 216  
 217      $completion = new completion_info($course);
 218      if ($completion->is_enabled()) {
 219          $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 220          $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 221          $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 222          $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 223  
 224          $PAGE->requires->js_init_call('M.core_completion.init');
 225      }
 226  
 227      // We are currently keeping the button here from 1.x to help new teachers figure out
 228      // what to do, even though the link also appears in the course admin block.  It also
 229      // means you can back out of a situation where you removed the admin block. :)
 230      if ($PAGE->user_allowed_editing()) {
 231          $buttons = $OUTPUT->edit_button($PAGE->url);
 232          $PAGE->set_button($buttons);
 233      }
 234  
 235      // If viewing a section, make the title more specific
 236      if ($section and $section > 0 and course_format_uses_sections($course->format)) {
 237          $sectionname = get_string('sectionname', "format_$course->format");
 238          $sectiontitle = get_section_name($course, $section);
 239          $PAGE->set_title(get_string('coursesectiontitle', 'moodle', array('course' => $course->fullname, 'sectiontitle' => $sectiontitle, 'sectionname' => $sectionname)));
 240      } else {
 241          $PAGE->set_title(get_string('coursetitle', 'moodle', array('course' => $course->fullname)));
 242      }
 243  
 244      $PAGE->set_heading($course->fullname);
 245      echo $OUTPUT->header();
 246  
 247      if ($completion->is_enabled()) {
 248          // This value tracks whether there has been a dynamic change to the page.
 249          // It is used so that if a user does this - (a) set some tickmarks, (b)
 250          // go to another page, (c) clicks Back button - the page will
 251          // automatically reload. Otherwise it would start with the wrong tick
 252          // values.
 253          echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 254          echo html_writer::start_tag('div');
 255          echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 256          echo html_writer::end_tag('div');
 257          echo html_writer::end_tag('form');
 258      }
 259  
 260      // Course wrapper start.
 261      echo html_writer::start_tag('div', array('class'=>'course-content'));
 262  
 263      // make sure that section 0 exists (this function will create one if it is missing)
 264      course_create_sections_if_missing($course, 0);
 265  
 266      // get information about course modules and existing module types
 267      // format.php in course formats may rely on presence of these variables
 268      $modinfo = get_fast_modinfo($course);
 269      $modnames = get_module_types_names();
 270      $modnamesplural = get_module_types_names(true);
 271      $modnamesused = $modinfo->get_used_module_names();
 272      $mods = $modinfo->get_cms();
 273      $sections = $modinfo->get_section_info_all();
 274  
 275      // CAUTION, hacky fundamental variable defintion to follow!
 276      // Note that because of the way course fromats are constructed though
 277      // inclusion we pass parameters around this way..
 278      $displaysection = $section;
 279  
 280      // Include the actual course format.
 281      require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 282      // Content wrapper end.
 283  
 284      echo html_writer::end_tag('div');
 285  
 286      // Trigger course viewed event.
 287      // We don't trust $context here. Course format inclusion above executes in the global space. We can't assume
 288      // anything after that point.
 289      $eventdata = array('context' => context_course::instance($course->id));
 290      if (!empty($section) && (int)$section == $section) {
 291          $eventdata['other'] = array('coursesectionid' => $section);
 292      }
 293      $event = \core\event\course_viewed::create($eventdata);
 294      $event->trigger();
 295  
 296      // Include course AJAX
 297      include_course_ajax($course, $modnamesused);
 298  
 299      echo $OUTPUT->footer();