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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * This file contains a class to analyse all the responses for multiple tries at a particular question.
  19   *
  20   * @package    core_question
  21   * @copyright  2014 Open University
  22   * @author     Jamie Pratt <me@jamiep.org>
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  namespace core_question\statistics\responses;
  27  
  28  /**
  29   * Analysis for possible responses for parts of a question with multiple submitted responses.
  30   *
  31   * If the analysis was for a single try it would be handled by {@link \core_question\statistics\responses\analysis_for_question}.
  32   *
  33   * - There is a separate data structure for each question or sub question's analysis
  34   * {@link \core_question\statistics\responses\analysis_for_question}
  35   * or {@link \core_question\statistics\responses\analysis_for_question_all_tries}.
  36   * - There are separate analysis for each variant in this top level instance.
  37   * - Then there are class instances representing the analysis of each of the sub parts of each variant of the question.
  38   * {@link \core_question\statistics\responses\analysis_for_subpart}.
  39   * - Then within the sub part analysis there are response class analysis
  40   * {@link \core_question\statistics\responses\analysis_for_class}.
  41   * - Then within each class analysis there are analysis for each actual response
  42   * {@link \core_question\statistics\responses\analysis_for_actual_response}.
  43   *
  44   * @package    core_question
  45   * @copyright  2014 The Open University
  46   * @author     James Pratt me@jamiep.org
  47   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  48   */
  49  class analysis_for_question_all_tries extends analysis_for_question{
  50      /**
  51       * Constructor.
  52       *
  53       * @param int      $variantno               variant number
  54       * @param \array[] $responsepartsforeachtry for question with multiple tries we expect an array with first index being try no
  55       *                                          then second index is subpartid and values are \question_classified_response
  56       */
  57      public function count_response_parts($variantno, $responsepartsforeachtry) {
  58          foreach ($responsepartsforeachtry as $try => $responseparts) {
  59              foreach ($responseparts as $subpartid => $responsepart) {
  60                  $this->get_analysis_for_subpart($variantno, $subpartid)->count_response($responsepart, $try);
  61              }
  62          }
  63      }
  64  
  65      public function has_multiple_tries_data() {
  66          return true;
  67      }
  68  
  69      /**
  70       * What is the highest number of tries at this question?
  71       *
  72       * @return int try number
  73       */
  74      public function get_maximum_tries() {
  75          $max = 1;
  76          foreach ($this->get_variant_nos() as $variantno) {
  77              foreach ($this->get_subpart_ids($variantno) as $subpartid) {
  78                  $max = max($max, $this->get_analysis_for_subpart($variantno, $subpartid)->get_maximum_tries());
  79              }
  80          }
  81          return $max;
  82      }
  83  
  84  }