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     $return      = optional_param('return', 0, PARAM_LOCALURL);
  24
  25     $params = array();
  26     if (!empty($name)) {
  27         $params = array('shortname' => $name);
  28     } else if (!empty($idnumber)) {
  29         $params = array('idnumber' => $idnumber);
  30     } else if (!empty($id)) {
  31         $params = array('id' => $id);
  32     }else {
  33         print_error('unspecifycourseid', 'error');
  34     }
  35
  36     $course = $DB->get_record('course', $params, '*', MUST_EXIST);
  37
  38     $urlparams = array('id' => $course->id);
  39
  40     // Sectionid should get priority over section number
  41     if ($sectionid) {
  42         $section = $DB->get_field('course_sections', 'section', array('id' => $sectionid, 'course' => $course->id), MUST_EXIST);
  43     }
  44     if ($section) {
  45         $urlparams['section'] = $section;
  46     }
  47
  48     $PAGE->set_url('/course/view.php', $urlparams); // Defined here to avoid notices on errors etc
  49
  50     // Prevent caching of this page to stop confusion when changing page after making AJAX changes
  51     $PAGE->set_cacheable(false);
  52
  53     preload_course_contexts($course->id);
  54     $context = context_course::instance($course->id, MUST_EXIST);
  55
  56     // Remove any switched roles before checking login
  57     if ($switchrole == 0 && confirm_sesskey()) {
  58         role_switch($switchrole, $context);
  59     }
  60
  61     require_login($course);
  62
  63     // Switchrole - sanity check in cost-order...
  64     $reset_user_allowed_editing = false;
  65     if ($switchrole > 0 && confirm_sesskey() &&
  66         has_capability('moodle/role:switchroles', $context)) {
  67         // is this role assignable in this context?
  68         // inquiring minds want to know...
  69         $aroles = get_switchable_roles($context);
  70         if (is_array($aroles) && isset($aroles[$switchrole])) {
  71             role_switch($switchrole, $context);
  72             // Double check that this role is allowed here
  73             require_login($course);
  74         }
  75         // reset course page state - this prevents some weird problems ;-)
  76         $USER->activitycopy = false;
  77         $USER->activitycopycourse = NULL;
  78         unset($USER->activitycopyname);
  79         unset($SESSION->modform);
  80         $USER->editing = 0;
  81         $reset_user_allowed_editing = true;
  82     }
  83
  84     //If course is hosted on an external server, redirect to corresponding
  85     //url with appropriate authentication attached as parameter
  86     if (file_exists($CFG->dirroot .'/course/externservercourse.php')) {
  87         include $CFG->dirroot .'/course/externservercourse.php';
  88         if (function_exists('extern_server_course')) {
  89             if ($extern_url = extern_server_course($course)) {
  90                 redirect($extern_url);
  91             }
  92         }
  93     }
  94
  95
  96     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
  97
  98     $logparam = 'id='. $course->id;
  99     $loglabel = 'view';
 100     $infoid = $course->id;
 101     if ($section and $section > 0) {
 102         $loglabel = 'view section';
 103
 104         // Get section details and check it exists.
 105         $modinfo = get_fast_modinfo($course);
 106         $coursesections = $modinfo->get_section_info($section, MUST_EXIST);
 107
 108         // Check user is allowed to see it.
 109         if (!$coursesections->uservisible) {
 110             // Note: We actually already know they don't have this capability
 111             // or uservisible would have been true; this is just to get the
 112             // correct error message shown.
 113             require_capability('moodle/course:viewhiddensections', $context);
 114         }
 115         $infoid = $coursesections->id;
 116         $logparam .= '&sectionid='. $infoid;
 117     }
 118     add_to_log($course->id, 'course', $loglabel, "view.php?". $logparam, $infoid);
 119
 120     $course->format = clean_param($course->format, PARAM_ALPHA);
 121     if (!file_exists($CFG->dirroot.'/course/format/'.$course->format.'/format.php')) {
 122         $course->format = 'weeks';  // Default format is weeks
 123     }
 124
 125     $PAGE->set_pagelayout('course');
 126     $PAGE->set_pagetype('course-view-' . $course->format);
 127     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 128
 129     if ($reset_user_allowed_editing) {
 130         // ugly hack
 131         unset($PAGE->_user_allowed_editing);
 132     }
 133
 134     if (!isset($USER->editing)) {
 135         $USER->editing = 0;
 136     }
 137     if ($PAGE->user_allowed_editing()) {
 138         if (($edit == 1) and confirm_sesskey()) {
 139             $USER->editing = 1;
 140             // Redirect to site root if Editing is toggled on frontpage
 141             if ($course->id == SITEID) {
 142                 redirect($CFG->wwwroot .'/?redirect=0');
 143             } else {
 144                 $url = new moodle_url($PAGE->url, array('notifyeditingon' => 1));
 145                 redirect($url);
 146             }
 147         } else if (($edit == 0) and confirm_sesskey()) {
 148             $USER->editing = 0;
 149             if(!empty($USER->activitycopy) && $USER->activitycopycourse == $course->id) {
 150                 $USER->activitycopy       = false;
 151                 $USER->activitycopycourse = NULL;
 152             }
 153             // Redirect to site root if Editing is toggled on frontpage
 154             if ($course->id == SITEID) {
 155                 redirect($CFG->wwwroot .'/?redirect=0');
 156             } else if (!empty($return)) {
 157                 redirect($CFG->wwwroot . $return);
 158             } else {
 159                 redirect($PAGE->url);
 160             }
 161         }
 162         if (($modchooser == 1) && confirm_sesskey()) {
 163             set_user_preference('usemodchooser', $modchooser);
 164         } else if (($modchooser == 0) && confirm_sesskey()) {
 165             set_user_preference('usemodchooser', $modchooser);
 166         }
 167
 168         if (has_capability('moodle/course:sectionvisibility', $context)) {
 169             if ($hide && confirm_sesskey()) {
 170                 set_section_visible($course->id, $hide, '0');
 171                 redirect($PAGE->url);
 172             }
 173
 174             if ($show && confirm_sesskey()) {
 175                 set_section_visible($course->id, $show, '1');
 176                 redirect($PAGE->url);
 177             }
 178         }
 179
 180         if (has_capability('moodle/course:update', $context)) {
 181             if (!empty($section)) {
 182                 if (!empty($move) and has_capability('moodle/course:movesections', $context) and confirm_sesskey()) {
 183                     $destsection = $section + $move;
 184                     if (move_section_to($course, $section, $destsection)) {
 185                         // Rebuild course cache, after moving section
 186                         rebuild_course_cache($course->id, true);
 187                         if ($course->id == SITEID) {
 188                             redirect($CFG->wwwroot . '/?redirect=0');
 189                         } else {
 190                             redirect(course_get_url($course));
 191                         }
 192                     } else {
 193                         echo $OUTPUT->notification('An error occurred while moving a section');
 194                     }
 195                 }
 196             }
 197         }
 198     } else {
 199         $USER->editing = 0;
 200     }
 201
 202     $SESSION->fromdiscussion = $PAGE->url->out(false);
 203
 204
 205     if ($course->id == SITEID) {
 206         // This course is not a real course.
 207         redirect($CFG->wwwroot .'/');
 208     }
 209
 210     $completion = new completion_info($course);
 211     if ($completion->is_enabled() && ajaxenabled()) {
 212         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
 213         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
 214         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
 215         $PAGE->requires->string_for_js('completion-alt-manual-n', 'completion');
 216
 217         $PAGE->requires->js_init_call('M.core_completion.init');
 218     }
 219
 220     // We are currently keeping the button here from 1.x to help new teachers figure out
 221     // what to do, even though the link also appears in the course admin block.  It also
 222     // means you can back out of a situation where you removed the admin block. :)
 223     if ($PAGE->user_allowed_editing()) {
 224         $buttons = $OUTPUT->edit_button($PAGE->url);
 225         $PAGE->set_button($buttons);
 226     }
 227
 228     $PAGE->set_title(get_string('course') . ': ' . $course->fullname);
 229     $PAGE->set_heading($course->fullname);
 230     echo $OUTPUT->header();
 231
 232     if ($completion->is_enabled() && ajaxenabled()) {
 233         // This value tracks whether there has been a dynamic change to the page.
 234         // It is used so that if a user does this - (a) set some tickmarks, (b)
 235         // go to another page, (c) clicks Back button - the page will
 236         // automatically reload. Otherwise it would start with the wrong tick
 237         // values.
 238         echo html_writer::start_tag('form', array('action'=>'.', 'method'=>'get'));
 239         echo html_writer::start_tag('div');
 240         echo html_writer::empty_tag('input', array('type'=>'hidden', 'id'=>'completion_dynamic_change', 'name'=>'completion_dynamic_change', 'value'=>'0'));
 241         echo html_writer::end_tag('div');
 242         echo html_writer::end_tag('form');
 243     }
 244
 245     // Course wrapper start.
 246     echo html_writer::start_tag('div', array('class'=>'course-content'));
 247
 248     $modinfo = get_fast_modinfo($COURSE);
 249     get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 250     foreach($mods as $modid=>$unused) {
 251         if (!isset($modinfo->cms[$modid])) {
 252             rebuild_course_cache($course->id);
 253             $modinfo = get_fast_modinfo($COURSE);
 254             debugging('Rebuilding course cache', DEBUG_DEVELOPER);
 255             break;
 256         }
 257     }
 258
 259     if (!$sections = $modinfo->get_section_info_all()) {   // No sections found
 260         $section = new stdClass;
 261         $section->course = $course->id;   // Create a default section.
 262         $section->section = 0;
 263         $section->visible = 1;
 264         $section->summaryformat = FORMAT_HTML;
 265         $section->id = $DB->insert_record('course_sections', $section);
 266         rebuild_course_cache($course->id);
 267         $modinfo = get_fast_modinfo($COURSE);
 268         if (!$sections = $modinfo->get_section_info_all()) {      // Try again
 269             print_error('cannotcreateorfindstructs', 'error');
 270         }
 271     }
 272
 273     // CAUTION, hacky fundamental variable defintion to follow!
 274     // Note that because of the way course fromats are constructed though
 275     // inclusion we pass parameters around this way..
 276     $displaysection = $section;
 277
 278     // Include the actual course format.
 279     require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 280     // Content wrapper end.
 281
 282     echo html_writer::end_tag('div');
 283
 284     // Include course AJAX
 285     if (include_course_ajax($course, $modnamesused)) {
 286         // Add the module chooser
 287         $renderer = $PAGE->get_renderer('core', 'course');
 288         echo $renderer->course_modchooser(get_module_metadata($course, $modnames, $displaysection), $course);
 289     }
 290
 291     echo $OUTPUT->footer();