PlanPackage.php
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PlanPackage.php
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	<?php

	namespace App;

	use Illuminate\Database\Eloquent\Relations\BelongsTo;
	use Illuminate\Database\Eloquent\Relations\Pivot;

	/**
	* Link Packages to Plans.
	*
	* @property int $discount_qty
	* @property int $discount_rate
	* @property string $plan_id
	* @property string $package_id
	* @property int $qty
	* @property int $qty_max
	* @property int $qty_min
	* @property Package $package
	* @property Plan $plan
	*/
	class PlanPackage extends Pivot
	{
	/** @var list<string> The attributes that are mass assignable */
	protected $fillable = [
	'plan_id',
	'package_id',
	'qty',
	'qty_max',
	'qty_min',
	'discount_qty',
	'discount_rate',
	];

	/** @var array<string, string> The attributes that should be cast */
	protected $casts = [
	'qty' => 'integer',
	'qty_max' => 'integer',
	'qty_min' => 'integer',
	'discount_qty' => 'integer',
	'discount_rate' => 'integer',
	];

	/**
	* Calculate the costs for this package.
	*
	* @return int The costs in cents
	*/
	public function cost()
	{
	$costs = 0;

	// TODO: consider discount_qty/discount_rate here?

	if ($this->qty_min > 0) {
	$costs += $this->package->cost() * $this->qty_min;
	} elseif ($this->qty > 0) {
	$costs += $this->package->cost() * $this->qty;
	}

	return $costs;
	}

	/**
	* The package in this relation.
	*
	* @return BelongsTo<Package, $this>
	*/
	public function package()
	{
	return $this->belongsTo(Package::class);
	}

	/**
	* The plan in this relation.
	*
	* @return BelongsTo<Plan, $this>
	*/
	public function plan()
	{
	return $this->belongsTo(Plan::class);
	}
	}