src/Biz/Question/Type/Fill.php

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<?php

namespace Biz\Question\Type;

use Biz\Question\QuestionException;

class Fill extends BaseQuestion implements TypeInterface
{
    public function create($fields)
    {
    }

    public function update($id, $fields)
    {
    }

    public function delete($id)
    {
    }

    public function get($id)
    {
    }

    public function judge($question, $answer)
    {
        $questionAnswers = array_values($question['answer']);
        $answer = array_values($answer);

        if (count($answer) != count($questionAnswers)) {
            return array('status' => 'wrong', 'score' => 0);
        }

        $userAnswerIndex = $this->getAnswerIndex($questionAnswers, $answer);
        $rightCount = count($userAnswerIndex);

        if (0 == $rightCount) {
            return array('status' => 'wrong', 'score' => 0);
        } elseif ($rightCount < count($questionAnswers)) {
            $percentage = intval($rightCount / count($questionAnswers) * 100);
            $score = ($question['score'] * $percentage) / 100;
            $score = number_format($score, 1, '.', '');

            return array('status' => 'partRight', 'percentage' => $percentage, 'score' => $score);
        } else {
            return array('status' => 'right', 'score' => $question['score']);
        }
    }

    public function filter(array $fields)
    {
        $fields = parent::filter($fields);

        preg_match_all("/\[\[(.+?)\]\]/", $fields['stem'], $answer, PREG_PATTERN_ORDER);
        if (empty($answer[1])) {
            throw QuestionException::UNEXPECTED_ANSWER();
        }

        $fields['answer'] = array();
        foreach ($answer[1] as $value) {