course/view.php

   1 <?php
   2
   3 //  Display the course home page.
   4
   5     require_once('../config.php');
   6     require_once('lib.php');
   7     require_once($CFG->dirroot.'/mod/forum/lib.php');
   8     require_once($CFG->libdir.'/conditionlib.php');
   9     require_once($CFG->libdir.'/completionlib.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     $sectionid   = optional_param('sectionid', 0, PARAM_INT);
  18     $section     = optional_param('section', 0, PARAM_INT);
  19     $move        = optional_param('move', 0, PARAM_INT);
  20     $marker      = optional_param('marker',-1 , PARAM_INT);
  21     $switchrole  = optional_param('switchrole',-1, PARAM_INT);
  22     $modchooser  = optional_param('modchooser', -1, PARAM_BOOL);
  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     $PAGE->set_cacheable(false);
  51
  52     preload_course_contexts($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     $logparam = 'id='. $course->id;
  98     $loglabel = 'view';
  99     $infoid = $course->id;
 100     if ($section and $section > 0) {
 101         $loglabel = 'view section';
 102
 103         // Get section details and check it exists.
 104         $modinfo = get_fast_modinfo($course);
 105         $coursesections = $modinfo->get_section_info($section, MUST_EXIST);
 106
 107         // Check user is allowed to see it.
 108         if (!$coursesections->uservisible) {
 109             // Note: We actually already know they don't have this capability
 110             // or uservisible would have been true; this is just to get the
 111             // correct error message shown.
 112             require_capability('moodle/course:viewhiddensections', $context);
 113         }
 114         $infoid = $coursesections->id;
 115         $logparam .= '&sectionid='. $infoid;
 116     }
 117     add_to_log($course->id, 'course', $loglabel, "view.php?". $logparam, $infoid);
 118
 119     $course->format = clean_param($course->format, PARAM_ALPHA);
 120     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
 121         $course->format = 'weeks';  // Default format is weeks
 122     }
 123
 124     $PAGE->set_pagelayout('course');
 125     $PAGE->set_pagetype('course-view-' . $course->format);
 126     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 127
 128     if ($reset_user_allowed_editing) {
 129         // ugly hack
 130         unset($PAGE->_user_allowed_editing);
 131     }
 132
 133     if (!isset($USER->editing)) {
 134         $USER->editing = 0;
 135     }
 136     if ($PAGE->user_allowed_editing()) {
 137         if (($edit == 1) and confirm_sesskey()) {
 138             $USER->editing = 1;
 139             // Redirect to site root if Editing is toggled on frontpage
 140             if ($course->id == SITEID) {
 141                 redirect($CFG->wwwroot .'/?redirect=0');
 142             } else {
 143                 $url = new moodle_url($PAGE->url, array('notifyeditingon' => 1));
 144                 redirect($url);
 145             }
 146         } else if (($edit == 0) and confirm_sesskey()) {
 147             $USER->editing = 0;
 148             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 149                 $USER->activitycopy       = false;
 150                 $USER->activitycopycourse = NULL;
 151             }
 152             // Redirect to site root if Editing is toggled on frontpage
 153             if ($course->id == SITEID) {
 154                 redirect($CFG->wwwroot .'/?redirect=0');
 155             } else {
 156                 redirect($PAGE->url);
 157             }
 158         }
 159         if (($modchooser == 1) && confirm_sesskey()) {
 160             set_user_preference('usemodchooser', $modchooser);
 161         } else if (($modchooser == 0) && confirm_sesskey()) {
 162             set_user_preference('usemodchooser', $modchooser);
 163         }
 164
 165         if (has_capability('moodle/course:sectionvisibility', $context)) {
 166             if ($hide && confirm_sesskey()) {
 167                 set_section_visible($course->id, $hide, '0');
 168                 redirect($PAGE->url);
 169             }
 170
 171             if ($show && confirm_sesskey()) {
 172                 set_section_visible($course->id, $show, '1');
 173                 redirect($PAGE->url);
 174             }
 175         }
 176
 177         if (has_capability('moodle/course:update', $context)) {
 178             if (!empty($section)) {
 179                 if (!empty($move) and has_capability('moodle/course:movesections', $context) and confirm_sesskey()) {
 180                     $destsection = $section + $move;
 181                     if (move_section_to($course, $section, $destsection)) {
 182                         // Rebuild course cache, after moving section
 183                         rebuild_course_cache($course->id, true);
 184                         if ($course->id == SITEID) {
 185                             redirect($CFG->wwwroot . '/?redirect=0');
 186                         } else {
 187                             redirect(course_get_url($course));
 188                         }
 189                     } else {
 190                         echo $OUTPUT->notification('An error occurred while moving a section');
 191                     }
 192                 }
 193             }
 194         }
 195     } else {
 196         $USER->editing = 0;
 197     }
 198
 199     $SESSION->fromdiscussion = $PAGE->url->out(false);
 200
 201
 202     if ($course->id == SITEID) {
 203         // This course is not a real course.
 204         redirect($CFG->wwwroot .'/');
 205     }
 206
 207     $completion = new completion_info($course);
 208     if ($completion->is_enabled() && ajaxenabled()) {
 209         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 210         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 211         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 212         $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 213
 214         $PAGE->requires->js_init_call('M.core_completion.init');
 215     }
 216
 217     // We are currently keeping the button here from 1.x to help new teachers figure out
 218     // what to do, even though the link also appears in the course admin block.  It also
 219     // means you can back out of a situation where you removed the admin block. :)
 220     if ($PAGE->user_allowed_editing()) {
 221         $buttons = $OUTPUT->edit_button($PAGE->url);
 222         $PAGE->set_button($buttons);
 223     }
 224
 225     $PAGE->set_title(get_string('course') . ': ' . $course->fullname);
 226     $PAGE->set_heading($course->fullname);
 227     echo $OUTPUT->header();
 228
 229     if ($completion->is_enabled() && ajaxenabled()) {
 230         // This value tracks whether there has been a dynamic change to the page.
 231         // It is used so that if a user does this - (a) set some tickmarks, (b)
 232         // go to another page, (c) clicks Back button - the page will
 233         // automatically reload. Otherwise it would start with the wrong tick
 234         // values.
 235         echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 236         echo html_writer::start_tag('div');
 237         echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 238         echo html_writer::end_tag('div');
 239         echo html_writer::end_tag('form');
 240     }
 241
 242     // Course wrapper start.
 243     echo html_writer::start_tag('div', array('class'=>'course-content'));
 244
 245     $modinfo = get_fast_modinfo($COURSE);
 246     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 247     foreach($mods as $modid=>$unused) {
 248         if (!isset($modinfo->cms[$modid])) {
 249             rebuild_course_cache($course->id);
 250             $modinfo = get_fast_modinfo($COURSE);
 251             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 252             break;
 253         }
 254     }
 255
 256     if (!$sections = $modinfo->get_section_info_all()) {   // No sections found
 257         $section = new stdClass;
 258         $section->course = $course->id;   // Create a default section.
 259         $section->section = 0;
 260         $section->visible = 1;
 261         $section->summaryformat = FORMAT_HTML;
 262         $section->id = $DB->insert_record('course_sections', $section);
 263         rebuild_course_cache($course->id);
 264         $modinfo = get_fast_modinfo($COURSE);
 265         if (!$sections = $modinfo->get_section_info_all()) {      // Try again
 266             print_error('cannotcreateorfindstructs', 'error');
 267         }
 268     }
 269
 270     // CAUTION, hacky fundamental variable defintion to follow!
 271     // Note that because of the way course fromats are constructed though
 272     // inclusion we pass parameters around this way..
 273     $displaysection = $section;
 274
 275     // Include the actual course format.
 276     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 277     // Content wrapper end.
 278
 279     echo html_writer::end_tag('div');
 280
 281     // Include course AJAX
 282     if (include_course_ajax($course, $modnamesused)) {
 283         // Add the module chooser
 284         $renderer = $PAGE->get_renderer('core', 'course');
 285         echo $renderer->course_modchooser(get_module_metadata($course, $modnames, $displaysection), $course);
 286     }
 287
 288     echo $OUTPUT->footer();