PackageSku.php
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PackageSku.php
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	<?php

	namespace App;

	use Illuminate\Database\Eloquent\Relations\Pivot;

	/**
	* Link SKUs to Packages.
	*
	* @property int $cost
	* @property string $package_id
	* @property \App\Package $package
	* @property int $qty
	* @property \App\Sku $sku
	* @property string $sku_id
	*/
	class PackageSku extends Pivot
	{
	protected $fillable = [
	'package_id',
	'sku_id',
	'cost',
	'qty'
	];

	protected $casts = [
	'cost' => 'integer',
	'qty' => 'integer'
	];

	/**
	* Under this package, how much does this SKU cost?
	*
	* @return int The costs of this SKU under this package in cents.
	*/
	public function cost()
	{
	$units = $this->qty - $this->sku->units_free;

	if ($units < 0) {
	$units = 0;
	}

	// FIXME: Why package_skus.cost value is not used anywhere?

	$ppu = $this->sku->cost * ((100 - $this->package->discount_rate) / 100);

	return $units * $ppu;
	}

	/**
	* Under this package, what fee this SKU has?
	*
	* @return int The fee for this SKU under this package in cents.
	*/
	public function fee()
	{
	$units = $this->qty - $this->sku->units_free;

	if ($units < 0) {
	$units = 0;
	}

	return $this->sku->fee * $units;
	}

	/**
	* The package for this relation.
	*
	* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
	*/
	public function package()
	{
	return $this->belongsTo('App\Package');
	}

	/**
	* The SKU for this relation.
	*
	* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
	*/
	public function sku()
	{
	return $this->belongsTo('App\Sku');
	}
	}