question/category.php

   1 <?php // $Id$
   2 /**
   3  * Allows a teacher to create, edit and delete categories
   4  *
   5  * @author Martin Dougiamas and many others.
   6  *         {@link http://moodle.org}
   7  * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
   8  * @package questionbank
   9  */
  10
  11     require_once("../config.php");
  12     require_once($CFG->dirroot."/question/editlib.php");
  13     require_once($CFG->dirroot."/question/category_class.php");
  14
  15
  16
  17     list($thispageurl, $contexts, $cmid, $cm, $module, $pagevars) = question_edit_setup('categories');
  18
  19     // get values from form for actions on this page
  20     $param = new stdClass();
  21
  22
  23     $param->moveup = optional_param('moveup', 0, PARAM_INT);
  24     $param->movedown = optional_param('movedown', 0, PARAM_INT);
  25     $param->moveupcontext = optional_param('moveupcontext', 0, PARAM_INT);
  26     $param->movedowncontext = optional_param('movedowncontext', 0, PARAM_INT);
  27     $param->tocontext = optional_param('tocontext', 0, PARAM_INT);
  28     $param->left = optional_param('left', 0, PARAM_INT);
  29     $param->right = optional_param('right', 0, PARAM_INT);
  30     $param->delete = optional_param('delete', 0, PARAM_INT);
  31     $param->confirm = optional_param('confirm', 0, PARAM_INT);
  32     $param->cancel = optional_param('cancel', '', PARAM_ALPHA);
  33     $param->move = optional_param('move', 0, PARAM_INT);
  34     $param->moveto = optional_param('moveto', 0, PARAM_INT);
  35     $param->edit = optional_param('edit', 0, PARAM_INT);
  36
  37     $qcobject = new question_category_object($pagevars['cpage'], $thispageurl, $contexts->having_one_edit_tab_cap('categories'), $param->edit, $pagevars['cat'], $param->delete,
  38                                 $contexts->having_cap('moodle/question:add'));
  39
  40     $streditingcategories = get_string('editcategories', 'quiz');
  41     if ($param->left || $param->right || $param->moveup || $param->movedown|| $param->moveupcontext || $param->movedowncontext){
  42         require_sesskey();
  43         foreach ($qcobject->editlists as $list){
  44             //processing of these actions is handled in the method where appropriate and page redirects.
  45             $list->process_actions($param->left, $param->right, $param->moveup, $param->movedown,
  46                                     $param->moveupcontext, $param->movedowncontext, $param->tocontext);
  47         }
  48     }
  49     if ($param->delete && ($questionstomove = count_records("question", "category", $param->delete))){
  50         if (!$category = get_record("question_categories", "id", $param->delete)) {  // security
  51             error("No such category {$param->delete}!", $thispageurl->out());
  52         }
  53         $categorycontext = get_context_instance_by_id($category->contextid);
  54         $qcobject->moveform = new question_move_form($thispageurl,
  55                     array('contexts'=>array($categorycontext), 'currentcat'=>$param->delete));
  56         if ($qcobject->moveform->is_cancelled()){
  57             redirect($thispageurl->out());
  58         }  elseif ($formdata = $qcobject->moveform->get_data()) {
  59             /// 'confirm' is the category to move existing questions to
  60             list($tocategoryid, $tocontextid) = explode(',', $formdata->category);
  61             $qcobject->move_questions_and_delete_category($formdata->delete, $tocategoryid);
  62             $thispageurl->remove_params('cat', 'category');
  63             redirect($thispageurl->out());
  64         }
  65     } else {
  66         $questionstomove = 0;
  67     }
  68     if ($qcobject->catform->is_cancelled()) {
  69         redirect($thispageurl->out());
  70     } else if ($catformdata = $qcobject->catform->get_data()) {
  71         if (!$catformdata->id) {//new category
  72             $qcobject->add_category($catformdata->parent, $catformdata->name, $catformdata->info);
  73         } else {
  74             $qcobject->update_category($catformdata->id, $catformdata->parent, $catformdata->name, $catformdata->info);
  75         }
  76         redirect($thispageurl->out());
  77     } else if ((!empty($param->delete) and (!$questionstomove) and confirm_sesskey()))  {
  78         $qcobject->delete_category($param->delete);//delete the category now no questions to move
  79         $thispageurl->remove_params('cat', 'category');
  80         redirect($thispageurl->out());
  81     }
  82     $navlinks = array();
  83     if ($cm!==null) {
  84         // Page header
  85         $strupdatemodule = has_capability('moodle/course:manageactivities', $contexts->lowest())
  86             ? update_module_button($cm->id, $COURSE->id, get_string('modulename', $cm->modname))
  87             : "";
  88         $navlinks[] = array('name' => get_string('modulenameplural', $cm->modname),
  89                             'link' => "$CFG->wwwroot/mod/{$cm->modname}/index.php?id=$COURSE->id",
  90                             'type' => 'activity');
  91         $navlinks[] = array('name' => format_string($module->name),
  92                             'link' => "$CFG->wwwroot/mod/{$cm->modname}/view.php?id={$cm->id}",
  93                             'type' => 'title');
  94     } else {
  95         // Print basic page layout.
  96         $strupdatemodule = '';
  97     }
  98
  99     if (!$param->edit){
 100         $navlinks[] = array('name' => $streditingcategories, 'link' => '', 'type' => 'title');
 101     } else {
 102         $navlinks[] = array('name' => $streditingcategories, 'link' => $thispageurl->out(), 'type' => 'title');
 103         $navlinks[] = array('name' => get_string('editingcategory', 'question'), 'link' => '', 'type' => 'title');
 104     }
 105
 106     $navigation = build_navigation($navlinks);
 107     print_header_simple($streditingcategories, '', $navigation, "", "", true, $strupdatemodule);
 108
 109     // print tabs
 110     if ($cm!==null) {
 111         $currenttab = 'edit';
 112         $mode = 'categories';
 113         ${$cm->modname} = $module;
 114         include($CFG->dirroot."/mod/{$cm->modname}/tabs.php");
 115     } else {
 116         $currenttab = 'categories';
 117         $context = $contexts->lowest();
 118         include('tabs.php');
 119     }
 120
 121     // display UI
 122     if (!empty($param->edit)) {
 123         $qcobject->edit_single_category($param->edit);
 124     } else if ($questionstomove){
 125         $qcobject->display_move_form($questionstomove, $category);
 126     } else {
 127         // display the user interface
 128         $qcobject->display_user_interface();
 129     }
 130     print_footer($COURSE);
 131 ?>