class.ilRegExpInputGUI.php

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<?php

declare(strict_types=1);

class ilRegExpInputGUI extends ilTextInputGUI
{
    private string $pattern = "";
    protected string $nomatchmessage = "";

    public function __construct(
        string $a_title = "",
        string $a_postvar = ""
    ) {
        global $DIC;

        $this->lng = $DIC->language();
        parent::__construct($a_title, $a_postvar);
        $this->setType("feedurl");
    }

    public function setNoMatchMessage(string $a_nomatchmessage): void
    {
        $this->nomatchmessage = $a_nomatchmessage;
    }

    public function getNoMatchMessage(): string
    {
        return $this->nomatchmessage;
    }

    public function setPattern(string $pattern): void
    {
        $this->pattern = $pattern;
    }

    public function getPattern(): string
    {
        return $this->pattern;
    }

    public function checkInput(): bool
    {
        $lng = $this->lng;

        $value = $this->getInput();

        if (!$this->getRequired() && strcasecmp($value, "") == 0) {
            return true;
        }

        if ($this->getRequired() && trim($value) == "") {
            $this->setAlert($lng->txt("msg_input_is_required"));
            return false;
        }

        $result = (bool) preg_match($this->pattern, $value);
        if (!$result) {
            if ($this->getNoMatchMessage() == "") {
                $this->setAlert($lng->txt("msg_input_does_not_match_regexp"));
            } else {
                $this->setAlert($this->getNoMatchMessage());
            }
        }
        return $result;
    }

    public function getInput(): string
    {
        return $this->str($this->getPostVar());
    }
}