osb/app/Interfaces/ProductItem.php

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<?php
namespace App\Interfaces;
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use Illuminate\Support\Collection;
interface ProductItem
{
public function products();
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public function supplied();
/**
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* Return the traffic inclusion with the service
*
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* @return mixed
*/
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public function allowance(): Collection;
/**
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* Render the traffic inclusion as a string
*
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* @return mixed
*/
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public function allowance_string(): string;
/**
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* Return the contract term for this product when sold as a service
*
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* @return int Months
*/
public function getContractTermAttribute(): int;
/**
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* Return the product cost
*
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* @return float
*/
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public function getCostAttribute(): float;
/**
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* Return the supplier class
* If there is a model relationship return:
* return $this->getRelationValue('supplier');
* otherwise return a stdClass with name
*
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* @return mixed
*/
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public function getSupplierAttribute();
/**
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* Does this offering capture usage information
*
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* @return bool
*/
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public function hasUsage(): bool;
}