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Package date-validator
Short Description Historical date validator.
License UNLICENSED
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Informations about the package date-validator
date-validator
Installation
I've added this to Packagist, so you can use:
Alternatively, you can clone the repository and run:
Running tests
Run tests with:
Usage
You can inject the date validator like this:
This package comes with a default implementation. The DefaultDateValidator requires a Clock in order for it to compare dates. A DefaultDateValidator should be initialised within an IoC container. It can be constructed like this:
The validate() method returns a DateValidatorResponse value object with the following methods:
isValid(): boolWhether the date is a valid historical date or not.getMessage(): DateValidatorResponseMessageReturns an enum with the following options:INVALID_DATEThe input date is not a valid date (e.g. 32/13/1994)NOT_A_DATE_IN_THE_PASTThe input date is valid but it's not in the past (e.g. 01/01/3033)INVALID_FORMATThe input is not a date at all (e.g. 'jibberish')- If the date is valid then the message is a null version of
DateValidatorResponseMessage
This package also provides a singleton which can be used like this:
The singleton uses a DefaultDateValidator internally and validateHistoricalDate() works the same way as above.
My strategy
You can see the way that I approached this task my looking at my commit history.
Note on really historical dates
The solution I've written handles dates back to the year 1 CE. It doesn't handle dates BCE. And bizarrely thinks that there is a year zero. If I was to devote more time to this - and there was a business case for it - I'd investigate that. [OK I couldn't resist looking it up. It seems that PHP is using some implementation of ISO 8601 and not the Gregorian calendar]
Note on PHP date formats
The stipulation that the input date format should be DD/MM/YYYY reminded me of an interesting quirk of certain PHP functions which I discussed in a Stackoverflow answer many years ago. Just a mildly interesting titbit 😄
