README

The library serves a Price class that can be used to represent a price in an object that can be sold or has its value.

Goals:

• Calculating multiple prices;
• Calculating multiple prices with different currencies;
• Calculating multiple prices with different tax rates;
• Combination of any or all above.

User of this library should mainly use \MiBo\Prices\Price class, that comes with an implementation of \MiBo\Prices\Contracts\PriceInterface, or \MiBo\Properties\Contracts\NumericalProperty, meaning, the class follows native add, subtract methods. The PriceInterface extends the NumericalProperty Interface by adding getValueOfVAT and getValueWithVAT methods that can be used to get value of either VAT or both, VAT and the base value. The Interface then extends the PropertyInterface by forCountry method that can be used when one wants to change the VAT of the Price for a specific country.

Installation

composer require mibo/prices

Usage

$price = new \MiBo\Prices\Price(
    10,
    \MiBo\Prices\Units\Price\Currency::get("EUR"),
    \MiBo\Prices\Calculators\PriceCalc::getVATManager()->retrieveVAT($classification, 'SVK')
);
$price->getValue(); // 10
$price->getValueOfVAT(); // 2 (20% of 10 for the day of writing this)
$price->getValueWithVAT(); // 12 (10 + 2)

$price->forCountry("CZE");
$price->getValueWithVAT(); // 11.5 (10 + 1.5 for the day of writing this)

NOTE:

• Before using conversion of currencies, one must require a library that provides conversion rates. The conversion is not part of this library!
• Before using conversion of VAT rates, one must require a library that provides VAT rates. The conversion is not part of this library!

Logic of the library

This library one extends MiBo\Properties library by a Price, using MiBo\VAT to get VAT for the Prices, and MiBo\Currencies for currencies - units of the Prices.

Calculators

PriceCalc class is there to calculate multiple prices, either adding them together, or subtracting them. The point is to have this process on the single place. The Calculator checks the currencies and VAT rates.

Price

The \MiBo\Prices\Price class, the (main) property, is a class-to-be-used by a user. One should not have a need to use another class.

Changes, updates, etc.

The library does not cover a conversion between currencies, nor VAT rates. If one wants to have that solved, check composer suggestions. If empty, the libraries that are focused on that are not yet published, however, they are under development and will be available soon.

Notes

Please, be aware that comparing prices is complex and should be done with care. Currently, the library does provide a way to compare prices, however, that is being marked as deprecated and experimental, even tho, it should work fine. One should make sure that the behavior is as expected, because comparing a price with VAT and currency is way too hard.