MultichoiceResponse.php in Quiz 8.6

Namespace

Drupal\quiz_multichoice\Plugin\quiz\QuizQuestion

File

question_types/quiz_multichoice/src/Plugin/quiz/QuizQuestion/MultichoiceResponse.php

<?php

namespace Drupal\quiz_multichoice\Plugin\quiz\QuizQuestion;

use Drupal\quiz\Entity\QuizResultAnswer;
use Drupal\quiz\Util\QuizUtil;
use function _quiz_question_response_get_instance;
use function check_markup;
use function db_delete;
use function db_query;
use function db_select;
use function entity_load;
use function node_load_multiple;

/**
 * Extension of QuizQuestionResponse.
 */
class MultichoiceResponse extends QuizResultAnswer {

  /**
   * ID of the answers.
   */
  protected $user_answer_ids;
  protected $choice_order;

  /**
   * Implementation of delete().
   *
   * @see QuizQuestionResponse::delete()
   */
  public function delete() {
    $user_answer_id = array();
    $query = db_query('SELECT id FROM {quiz_multichoice_user_answers} WHERE result_answer_id = :raid', array(
      ':raid' => $this->result_answer_id,
    ));
    while ($user_answer = $query
      ->fetch()) {
      $user_answer_id[] = $user_answer->id;
    }
    if (!empty($user_answer_id)) {
      db_delete('quiz_multichoice_user_answer_multi')
        ->condition('user_answer_id', $user_answer_id, 'IN')
        ->execute();
    }
    db_delete('quiz_multichoice_user_answers')
      ->condition('result_answer_id', $this->result_answer_id)
      ->execute();
  }

  /**
   * {@inheritdoc}
   */
  public function score($response) {
    if (!is_array($response['answer']['user_answer'])) {
      $selected_vids = [
        $response['answer']['user_answer'],
      ];
    }
    else {
      $selected_vids = $response['answer']['user_answer'];
    }

    // Reset whatever was here already.
    $this
      ->get('multichoice_answer')
      ->setValue(NULL);

    // The answer ID is the revision ID of the Paragraph item of the MCQ.
    // Fun!
    foreach ($selected_vids as $vid) {

      // Loop through all selected answers and append them to the paragraph
      // revision reference.
      $paragraph = \Drupal::entityTypeManager()
        ->getStorage('paragraph')
        ->loadRevision($vid);
      $this
        ->get('multichoice_answer')
        ->appendItem($paragraph);
    }
    $simple = $this
      ->getQuizQuestion()
      ->get('choice_boolean')
      ->getString();
    $multi = $this
      ->getQuizQuestion()
      ->get('choice_multi')
      ->getString();
    $score = 0;
    foreach ($this
      ->getQuizQuestion()
      ->get('alternatives')
      ->referencedEntities() as $alternative) {

      // Take action on each alternative being selected (or not).
      $vid = $alternative
        ->getRevisionId();

      // If this alternative was selected.
      $selected = in_array($vid, $selected_vids);
      $correct = $alternative
        ->get('multichoice_correct')
        ->getString();
      if (!$selected && $simple && $correct) {

        // Selected this answer, simple scoring on, and the answer was incorrect.
        $score = 0;
        break;
      }
      if ($selected && $correct && !$multi) {

        // User selected a correct answer and this is not a multiple answer
        // question. User gets the point value of the question.
        $score = $alternative
          ->get('multichoice_score_chosen')
          ->getString();
        break;
      }
      if ($multi) {

        // In multiple answer questions we sum up all the points.
        if ($selected) {

          // Add (or subtract) some points.
          $score += $alternative
            ->get('multichoice_score_chosen')
            ->getString();
        }
        else {
          $score += $alternative
            ->get('multichoice_score_not_chosen')
            ->getString();
        }
      }
    }
    return $score;
  }

  /**
   * Implementation of getResponse().
   *
   * @see QuizQuestionResponse::getResponse()
   */
  public function getResponse() {
    $vids = [];
    foreach ($this
      ->get('multichoice_answer')
      ->referencedEntities() as $alternative) {
      $vids[] = $alternative
        ->getRevisionId();
    }
    return $vids;
  }

  /**
   * {@inheritdoc}
   */
  public function getFeedbackValues() {

    // @todo d8

    //$this->orderAlternatives($this->question->alternatives);
    $simple_scoring = $this
      ->getQuizQuestion()
      ->get('choice_boolean')
      ->getString();
    $user_answers = $this
      ->getResponse();
    $data = array();
    foreach ($this
      ->getQuizQuestion()
      ->get('alternatives')
      ->referencedEntities() as $alternative) {
      $chosen = in_array($alternative
        ->getRevisionId(), $user_answers);
      $not = $chosen ? '' : 'not_';
      $data[] = array(
        'choice' => check_markup($alternative->multichoice_answer->value, $alternative->multichoice_answer->format),
        'attempt' => $chosen ? QuizUtil::icon('selected') : '',
        'correct' => $chosen ? $alternative->multichoice_score_chosen->value > 0 ? QuizUtil::icon('correct') : QuizUtil::icon('incorrect') : '',
        'score' => (int) $alternative->{"multichoice_score_{$not}chosen"}->value,
        'answer_feedback' => check_markup($alternative->{"multichoice_feedback_{$not}chosen"}->value, $alternative->{"multichoice_feedback_{$not}chosen"}->format),
        'question_feedback' => 'Question feedback',
        'solution' => $alternative->multichoice_score_chosen->value > 0 ? QuizUtil::icon('should') : ($simple_scoring ? QuizUtil::icon('should-not') : ''),
        'quiz_feedback' => "Quiz feedback",
      );
    }
    return $data;
  }

  /**
   * Order the alternatives according to the choice order stored in the database.
   *
   * @param array $alternatives
   *   The alternatives to be ordered.
   */
  protected function orderAlternatives(array &$alternatives) {
    if (!$this->question->choice_random) {
      return;
    }
    $result = db_query('SELECT choice_order FROM {quiz_multichoice_user_answers}
            WHERE result_answer_id = :raid', array(
      ':raid' => $this->result_answer_id,
    ))
      ->fetchField();
    if (!$result) {
      return;
    }
    $order = explode(',', $result);
    $newAlternatives = array();
    foreach ($order as $value) {
      foreach ($alternatives as $alternative) {
        if ($alternative['id'] == $value) {
          $newAlternatives[] = $alternative;
          break;
        }
      }
    }
    $alternatives = $newAlternatives;
  }

  /**
   * Get answers for a question in a result.
   *
   * This static method assists in building views for the mass export of
   * question answers.
   *
   * @see views_handler_field_prerender_list for the expected return value.
   */
  public static function viewsGetAnswers(array $result_answer_ids = array()) {
    $ras = entity_load('quiz_result_answer', $result_answer_ids);
    $items = array();
    $nids = db_select('quiz_node_results_answers', 'qra')
      ->fields('qra', array(
      'question_nid',
    ))
      ->condition('result_answer_id', $result_answer_ids)
      ->execute()
      ->fetchAllKeyed(0, 0);
    $nodes = node_load_multiple($nids);
    foreach ($ras as $ra) {
      $question = $nodes[$ra->question_nid];

      /* @var $ra_i QuizQuestionResponse */
      $ra_i = _quiz_question_response_get_instance($ra->result_id, $question);
      $alternatives = array();
      foreach ($question->alternatives as $alternative) {
        $alternatives[$alternative['id']] = $alternative;
      }
      foreach ($ra_i
        ->getResponse() as $answer_id) {
        if (!empty($answer_id)) {
          $items[$ra->result_id][] = array(
            'answer' => $alternatives[$answer_id]['answer']['value'],
          );
        }
      }
    }
    return $items;
  }

}

Classes

Name	Description
MultichoiceResponse	Extension of QuizQuestionResponse.