Package.php
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Package.php
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	<?php

	namespace App;

	use Illuminate\Database\Eloquent\Model;

	/**
	* The eloquent definition of a Package.
	*
	* A package is a set of SKUs that a user can select, so that instead of;
	*
	* * Create a mailbox entitlement,
	* * Create a quota entitlement,
	* * Create a groupware entitlement,
	* * ...
	*
	* users can simply select a 'package';
	*
	* * Kolab package: mailbox + quota + groupware,
	* * Free package: mailbox + quota.
	*
	* Selecting a package will therefore create a set of entitlments from SKUs.
	*/
	class Package extends Model
	{
	public $incrementing = false;
	protected $keyType = 'string';

	public $timestamps = false;

	protected $fillable = [
	'title',
	'description',
	'discount_rate'
	];

	public function cost()
	{
	$costs = 0;

	foreach ($this->skus as $sku) {
	$costs += ($sku->pivot->qty - $sku->units_free) * $sku->cost;
	}

	return $costs;
	}

	public function skus()
	{
	return $this->belongsToMany(
	'App\Sku',
	'package_skus'
	)->using('App\PackageSku')->withPivot(
	['qty']
	);
	}
	}