class.assAnswerTrueFalse.php

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<?php

class ASS_AnswerTrueFalse extends ASS_AnswerSimple
{
    public $correctness;

    public function __construct($answertext = "", $points = 0.0, $order = 0, $correctness = false)
    {
        parent::__construct($answertext, $points, $order, -1, 0);

        // force $this->correctness to be a string
        // ilDB->quote makes 1 from true and saving it to ENUM('1','0') makes that '0'!!!
        // (maybe that only happens for certain mysql versions)
        $this->correctness = $correctness . "";
    }

    public function getCorrectness()
    {
        return $this->correctness;
    }

    public function isCorrect()
    {
        return $this->correctness;
    }

    public function isIncorrect(): bool
    {
        return !$this->correctness;
    }

    public function isTrue()
    {
        return $this->correctness;
    }

    public function isFalse(): bool
    {
        return !$this->correctness;
    }

    public function setCorrectness($correctness = false): void
    {
        // force $this->correctness to be a string
        // ilDB->quote makes 1 from true and saving it to ENUM('1','0') makes that '0'!!!
        // (maybe that only happens for certain mysql versions)
        $this->correctness = $correctness . "";
    }

    public function setTrue(): void
    {
        $this->correctness = "1";
    }

    public function setFalse(): void
    {
        $this->correctness = "0";
    }
}