Add Syntax Check to Slovakia

[iekadou]

Add Slovakia TIN Check Digit

[what-the-diff]

PR Summary

• Inclusion of New Constants in SlovakiaSpec file
  Several constants have been appended to the 'SlovakiaSpec.php' file. These have been established to validate or invalidate specific numeric or syntax criteria which helps the system perform specific actions.

• Addition of Pattern Constant in Slovakia File
  A new 'PATTERN' constant has been introduced inside the 'Slovakia.php' file. This constant guides the system to recognize and behave according to certain patterns found within the data.

• Introduction of 'hasValidRule' method in Slovakia File
  A new method - 'hasValidRule', has been added to the 'Slovakia.php' file. This method effectively checks whether certain given rules or conditions are met in the course of operation. It enhances specificity and precision, enabling the system to act more accurately upon use-case scenarios.

[drupol]

Thanks.

Do you have documentation for this?

[drupol]

Suggested change

	if (strlen($tin) === 10
	&& (int) $tin % 11 === 0) {
	return true;
	}
	if (strlen($tin) === 10) {
	return ((int) substr($tin, 0, 9) % 11) % 10 === (int) substr($tin, 9, 1);
	}
	if (strlen($tin) === 10) {
	if ( (int) $tin % 11 === 0) {
	return true;
	}
	return ((int) substr($tin, 0, 9) % 11) % 10 === (int) substr($tin, 9, 1);
	}

[iekadou]

On the EU checker page (https://ec.europa.eu/taxation_customs/tin/#/check-tin) you can try e.g. 2822030541
This TIN is valid, even if it has 10 digits and starts with < 54.

We decompiled the Java lib you can find here:
https://taxation-customs.ec.europa.eu/document/download/07664928-b4f3-47a5-81f7-438767dc01cb_en?v=1721203258495

The modulo 11 check has those 2 modes in the decompiled lib.

[drupol]

Thank you!

[iekadou]

@drupol Can we do a new release for this? :)

[drupol]

Yes that's the plan. I have a few quirks to fix before, I will try to take care of this after my day, in the evening.