README

Totals, subtotals, linetotals, VAT-calculations and proper rounding for invoices.

Thanks

See Invoices: How to properly round and calculate totals

Usage

Invoiced handles money amounts in cents.

Discount Resolver

Discount resolver runs a set of custom rules in charge of figuring out an amount to subtract from a given product price.

Defining a custom rule

class TwentyPercentRule implements RuleInterface
{
    protected $product = null;

    public function __construct(\Product $product)
    {
        $this->product = $product;
    }

    public function getAmount()
    {
        return $this->product->getPrice() * 0.2;
    }
}

Running the rules

use Sirprize\Invoiced\BasePrice\Discount\Resolver;
use Sirprize\Invoiced\BasePrice\Discount\RuleInterface;

$product = new \Product(); // this can be anything really...
$resolver = new Resolver(Resolver::BEST); // the rule returning the biggest amount wins
$resolver->addRule(new TwentyPercentRule($product));
$discountAmount = $resolver->getAmount($product->getPrice());
$finalPrice = $product->getPrice() - $discountAmount;

Invoice

Invoice Line Item

use Sirprize\Invoiced\VatPrice\LineItem;

$lineItem = new LineItem(780, 19, true, 1); // $amount, $vatRate, $priceIncludesVat, $quantity

// line item totals
$lineItemGrossTotal = $lineItem->getPrice()->getGrossAmount();
$lineItemVatTotal = $lineItem->getPrice()->getVatAmount();
$lineItemNetTotal = $lineItem->getPrice()->getNetAmount();

// unit
$unitGrossAmount = $lineItem->getUnitPrice()->getGrossAmount();
$unitVatAmount = $lineItem->getUnitPrice()->getVatAmount();
$unitNetAmount = $lineItem->getUnitPrice()->getNetAmount();

Invoice Sum

use Sirprize\Invoiced\VatPrice\LineItem;
use Sirprize\Invoiced\VatPrice\Sum;

$sum = new Sum();

$sum
    ->addLineItem(new LineItem(780, 19, true, 1))
    ->addLineItem(new LineItem(2500, 7, true, 1))
;

$grossTotalAmount = $sum->getPrice()->getGrossAmount();
$vatTotalAmount = $sum->getPrice()->getVatAmount();
$netTotalAmount = $sum->getPrice()->getNetAmount();

Subtotals

Invoices often feature all kinds of subtotals such as discounts, items total, shipping and handling etc.

Base Price

A base price is just a simple object holding the baseprice, the discount amount and the final price of a product:

use Sirprize\Invoiced\BasePrice\Price;

$price = new Price(1000, 220); // $baseAmount, $discountAmount

$baseAmount = $price->getBaseAmount();
$discountAmount = $price->getDiscountAmount();
$finalAmount = $price->getFinalAmount();

Base Price Line Item

use Sirprize\Invoiced\BasePrice\LineItem;

$lineItem = new LineItem($price, 3); // $price, $quantity

// line item totals
$lineItemBaseAmount = $lineItem->getPrice()->getBaseAmount();
$lineItemDiscountAmount = $lineItem->getPrice()->getDiscountAmount();
$lineItemFinalAmount = $lineItem->getPrice()->getFinalAmount();

// unit
$unitBaseAmount = $lineItem->getUnitPrice()->getBaseAmount();
$unitDiscountAmount = $lineItem->getUnitPrice()->getDiscountAmount();
$unitFinalAmount = $lineItem->getUnitPrice()->getFinalAmount();

Base Price Sum

Base prices are then added to line items and summed up:

use Sirprize\Invoiced\BasePrice\LineItem;
use Sirprize\Invoiced\BasePrice\Sum;
use Sirprize\Invoiced\BasePrice\Price;

$sum = new Sum();

$sum
    ->addLineItem(new LineItem(new Price(1000, 220), 3))
    ->addLineItem(new LineItem(new Price(3000, 500), 10))
;

$baseTotalAmount = $sum->getPrice()->getBaseAmount();
$discountTotalAmount = $sum->getPrice()->getDiscountAmount();
$finalTotalAmount = $sum->getPrice()->getFinalAmount();

License

See LICENSE.