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   1  // This file is part of Moodle - http://moodle.org/
   2  //
   3  // Moodle is free software: you can redistribute it and/or modify
   4  // it under the terms of the GNU General Public License as published by
   5  // the Free Software Foundation, either version 3 of the License, or
   6  // (at your option) any later version.
   7  //
   8  // Moodle is distributed in the hope that it will be useful,
   9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  // GNU General Public License for more details.
  12  //
  13  // You should have received a copy of the GNU General Public License
  14  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  15  
  16  
  17  /**
  18   * Add questions from question bank functionality for a popup in quiz editing page.
  19   *
  20   * @package   mod_quiz
  21   * @copyright 2014 The Open University
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  var CSS = {
  26          QBANKLOADING:       'div.questionbankloading',
  27          ADDQUESTIONLINKS:   'ul.menu a.questionbank',
  28          ADDTOQUIZCONTAINER: 'td.addtoquizaction',
  29          PREVIEWCONTAINER:   'td.previewaction',
  30          SEARCHOPTIONS:      '#advancedsearch'
  31  };
  32  
  33  var PARAMS = {
  34      PAGE: 'addonpage',
  35      HEADER: 'header'
  36  };
  37  
  38  var POPUP = function() {
  39      POPUP.superclass.constructor.apply(this, arguments);
  40  };
  41  
  42  Y.extend(POPUP, Y.Base, {
  43      loadingDiv: '',
  44      dialogue: null,
  45      addonpage: 0,
  46      searchRegionInitialised: false,
  47  
  48      create_dialogue: function() {
  49          // Create a dialogue on the page and hide it.
  50          var config = {
  51              headerContent: '',
  52              bodyContent: Y.one(CSS.QBANKLOADING),
  53              draggable: true,
  54              modal: true,
  55              centered: true,
  56              width: null,
  57              visible: false,
  58              postmethod: 'form',
  59              footerContent: null,
  60              extraClasses: ['mod_quiz_qbank_dialogue']
  61          };
  62          this.dialogue = new M.core.dialogue(config);
  63          this.dialogue.bodyNode.delegate('click', this.link_clicked, 'a[href]', this);
  64          this.dialogue.hide();
  65  
  66          this.loadingDiv = this.dialogue.bodyNode.getHTML();
  67  
  68          Y.later(100, this, function() {
  69              this.load_content(window.location.search);
  70          });
  71      },
  72  
  73      initializer: function() {
  74          if (!Y.one(CSS.QBANKLOADING)) {
  75              return;
  76          }
  77          this.create_dialogue();
  78          Y.one('body').delegate('click', this.display_dialogue, CSS.ADDQUESTIONLINKS, this);
  79      },
  80  
  81      display_dialogue: function(e) {
  82          e.preventDefault();
  83          this.dialogue.set('headerContent', e.currentTarget.getData(PARAMS.HEADER));
  84  
  85          this.addonpage = e.currentTarget.getData(PARAMS.PAGE);
  86          var controlsDiv = this.dialogue.bodyNode.one('.modulespecificbuttonscontainer');
  87          if (controlsDiv) {
  88              var hidden = controlsDiv.one('input[name=addonpage]');
  89              if (!hidden) {
  90                  hidden = controlsDiv.appendChild('<input type="hidden" name="addonpage">');
  91              }
  92              hidden.set('value', this.addonpage);
  93          }
  94  
  95          this.initialiseSearchRegion();
  96          this.dialogue.show();
  97      },
  98  
  99      load_content: function(queryString) {
 100          Y.log('Starting load.', 'debug', 'moodle-mod_quiz-quizquestionbank');
 101          this.dialogue.bodyNode.append(this.loadingDiv);
 102  
 103          // If to support old IE.
 104          if (window.history.replaceState) {
 105              window.history.replaceState(null, '', M.cfg.wwwroot + '/mod/quiz/edit.php' + queryString);
 106          }
 107  
 108          Y.io(M.cfg.wwwroot + '/mod/quiz/questionbank.ajax.php' + queryString, {
 109              method: 'GET',
 110              on: {
 111                  success: this.load_done,
 112                  failure: this.load_failed
 113              },
 114              context: this
 115          });
 116  
 117          Y.log('Load request sent.', 'debug', 'moodle-mod_quiz-quizquestionbank');
 118      },
 119  
 120      load_done: function(transactionid, response) {
 121          var result = JSON.parse(response.responseText);
 122          if (!result.status || result.status !== 'OK') {
 123              // Because IIS is useless, Moodle can't send proper HTTP response
 124              // codes, so we have to detect failures manually.
 125              this.load_failed(transactionid, response);
 126              return;
 127          }
 128  
 129          Y.log('Load completed.', 'debug', 'moodle-mod_quiz-quizquestionbank');
 130  
 131          this.dialogue.bodyNode.setHTML(result.contents);
 132          Y.use('moodle-question-chooser', function() {
 133              M.question.init_chooser({});
 134          });
 135          this.dialogue.bodyNode.one('form').delegate('change', this.options_changed, '.searchoptions', this);
 136  
 137          if (this.dialogue.visible) {
 138              Y.later(0, this.dialogue, this.dialogue.centerDialogue);
 139          }
 140          M.question.qbankmanager.init();
 141  
 142          this.searchRegionInitialised = false;
 143          if (this.dialogue.get('visible')) {
 144              this.initialiseSearchRegion();
 145          }
 146  
 147          this.dialogue.fire('widget:contentUpdate');
 148          // TODO MDL-47602 really, the base class should listen for the even fired
 149          // on the previous line, and fix things like makeResponsive.
 150          // However, it does not. So the next two lines are a hack to fix up
 151          // display issues (e.g. overall scrollbars on the page). Once the base class
 152          // is fixed, this comment and the following four lines should be deleted.
 153          if (this.dialogue.get('visible')) {
 154              this.dialogue.hide();
 155              this.dialogue.show();
 156          }
 157      },
 158  
 159      load_failed: function() {
 160          Y.log('Load failed.', 'debug', 'moodle-mod_quiz-quizquestionbank');
 161      },
 162  
 163      link_clicked: function(e) {
 164          // Add question to quiz. mofify the URL, then let it work as normal.
 165          if (e.currentTarget.ancestor(CSS.ADDTOQUIZCONTAINER)) {
 166              e.currentTarget.set('href', e.currentTarget.get('href') + '&addonpage=' + this.addonpage);
 167              return;
 168          }
 169  
 170          // Question preview. Needs to open in a pop-up.
 171          if (e.currentTarget.ancestor(CSS.PREVIEWCONTAINER)) {
 172              window.openpopup(e, {
 173                  url: e.currentTarget.get('href'),
 174                  name: 'questionpreview',
 175                  options: 'height=600,width=800,top=0,left=0,menubar=0,location=0,scrollbars,' +
 176                           'resizable,toolbar,status,directories=0,fullscreen=0,dependent'
 177              });
 178              return;
 179          }
 180  
 181          // Click on expand/collaspse search-options. Has its own handler.
 182          // We should not interfere.
 183          if (e.currentTarget.ancestor(CSS.SEARCHOPTIONS)) {
 184              return;
 185          }
 186  
 187          // Anything else means reload the pop-up contents.
 188          e.preventDefault();
 189          this.load_content(e.currentTarget.get('search'));
 190      },
 191  
 192      options_changed: function(e) {
 193          e.preventDefault();
 194          this.load_content('?' + Y.IO.stringify(e.currentTarget.get('form')));
 195      },
 196  
 197      initialiseSearchRegion: function() {
 198          if (this.searchRegionInitialised === true) {
 199              return;
 200          }
 201          if (!Y.one(CSS.SEARCHOPTIONS)) {
 202              return;
 203          }
 204  
 205          M.util.init_collapsible_region(Y, "advancedsearch", "question_bank_advanced_search",
 206                  M.util.get_string('clicktohideshow', 'moodle'));
 207          this.searchRegionInitialised = true;
 208      }
 209  });
 210  
 211  M.mod_quiz = M.mod_quiz || {};
 212  M.mod_quiz.quizquestionbank = M.mod_quiz.quizquestionbank || {};
 213  M.mod_quiz.quizquestionbank.init = function() {
 214      return new POPUP();
 215  };