ilAssLacExpressionManufacturer.php

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<?php

class ilAssLacExpressionManufacturer extends ilAssLacAbstractManufacturer
{
    protected static $instance = null;

    public static function _getInstance(): ?ilAssLacExpressionManufacturer
    {
        if (self::$instance == null) {
            self::$instance = new ilAssLacExpressionManufacturer();
        }
        return self::$instance;
    }

    public function manufacture(string $attribute): ilAssLacAbstractComposite
    {
        $expression = null;

        switch (true) {
            case preg_match(ilAssLacResultOfAnswerOfQuestionExpression::$pattern, $attribute):
                $expression = new ilAssLacResultOfAnswerOfQuestionExpression();
                break;
            case preg_match(ilAssLacResultOfAnswerOfCurrentQuestionExpression::$pattern, $attribute):
                $expression = new ilAssLacResultOfAnswerOfCurrentQuestionExpression();
                break;
            case preg_match(ilAssLacAnswerOfQuestionExpression::$pattern, $attribute):
                $expression = new ilAssLacAnswerOfQuestionExpression();
                break;
            case preg_match(ilAssLacAnswerOfCurrentQuestionExpression::$pattern, $attribute):
                $expression = new ilAssLacAnswerOfCurrentQuestionExpression();
                break;
            case preg_match(ilAssLacPercentageResultExpression::$pattern, $attribute):
                $expression = new ilAssLacPercentageResultExpression();
                break;
            case preg_match(ilAssLacNumberOfResultExpression::$pattern, $attribute):
                $expression = new ilAssLacNumberOfResultExpression();
                break;
            case preg_match(ilAssLacNumericResultExpression::$pattern, $attribute):
                $expression = new ilAssLacNumericResultExpression();
                break;
            case preg_match(ilAssLacStringResultExpression::$pattern, $attribute):
                $expression = new ilAssLacStringResultExpression();
                break;
            case preg_match(ilAssLacMatchingResultExpression::$pattern, $attribute):
                $expression = new ilAssLacMatchingResultExpression();
                break;
            case preg_match(ilAssLacOrderingResultExpression::$pattern, $attribute):
                $expression = new ilAssLacOrderingResultExpression();
                break;
            case preg_match(ilAssLacExclusiveResultExpression::$pattern, $attribute):
                $expression = new ilAssLacExclusiveResultExpression();
                break;
            case preg_match(ilAssLacEmptyAnswerExpression::$pattern, $attribute):
                $expression = new ilAssLacEmptyAnswerExpression();
                break;
            default:
                throw new ilAssLacUnsupportedExpression($attribute);
                break;
        }

        $expression->parseValue($attribute);
        return $expression;
    }

    public function getPattern(): string
    {
        return
            "/" .
            substr(ilAssLacPercentageResultExpression::$pattern, 1, strlen(ilAssLacPercentageResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacNumericResultExpression::$pattern, 1, strlen(ilAssLacNumericResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacNumberOfResultExpression::$pattern, 1, strlen(ilAssLacNumberOfResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacAnswerOfQuestionExpression::$pattern, 1, strlen(ilAssLacAnswerOfQuestionExpression::$pattern) - 2) . "|" .
            substr(ilAssLacAnswerOfCurrentQuestionExpression::$pattern, 1, strlen(ilAssLacAnswerOfCurrentQuestionExpression::$pattern) - 2) . "|" .
            substr(ilAssLacResultOfAnswerOfQuestionExpression::$pattern, 1, strlen(ilAssLacResultOfAnswerOfQuestionExpression::$pattern) - 2) . "|" .
            substr(ilAssLacResultOfAnswerOfCurrentQuestionExpression::$pattern, 1, strlen(ilAssLacResultOfAnswerOfCurrentQuestionExpression::$pattern) - 2) . "|" .
            substr(ilAssLacStringResultExpression::$pattern, 1, strlen(ilAssLacStringResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacMatchingResultExpression::$pattern, 1, strlen(ilAssLacMatchingResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacOrderingResultExpression::$pattern, 1, strlen(ilAssLacOrderingResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacExclusiveResultExpression::$pattern, 1, strlen(ilAssLacExclusiveResultExpression::$pattern) - 2) . "|" .
            substr(ilAssLacEmptyAnswerExpression::$pattern, 1, strlen(ilAssLacEmptyAnswerExpression::$pattern) - 2) .
            "/";
    }

    private function __construct()
    {
    }

    private function __clone()
    {
    }
}