再次強調中介者模式，對象之間互相調用解耦

/******* 第一個版本 *********/
class GoodService
{
    public function paginate(Request $request, $perPage = 10)
    {
        $good = new GoodModel();
        $query = $good->query();
        if ($request->name) {
            $query->where('name', $request->name);
        }
        $paginate = $query->paginate($perPage);
        foreach ($paginate as &$row)
        {
            $row = $this->initRow($row);
        }
        return $row;
    }

    public function initRow($row)
    {
        $orderService = new OrderService();
        $row->sum = 0;
        if ($row->id) {
            $row->sum = $orderService->sumByGoodsId($row->od);
        }
        return $row;
    }

    public function get(Request $request)
    {
        $good = new GoodModel();
        $query = $good->query();
        if ($request->name) {
            $query->where('name', $request->name);
        }
        $data = $query->get();
        foreach ($data as &$row) {
            $row = $this->initRow($row);
        }
        return $row;
    }
}


class GoodModel
{
    public function query()
    {
        return $this;
    }
    public function where($file, $value)
    {
        return $this;
    }
    public function paginate()
    {
        return [];
    }
    public function get()
    {
        return [];
    }
}

class OrderModel
{
    public function query()
    {
       return $this;
    }
    public function where($file, $value)
    {
        return $this;
    }
    public function sum()
    {
        return 10;
    }
}


class OrderService
{
    public function sumByGoodsId($goodId)
    {
       $orderModel = new OrderModel();
       return $orderModel->query()->where('good_id', $goodId)->sum();
    }
}

class Export
{
    protected $goodService;
    public function __construct(GoodService $goodService)
    {
        $this->goodService = $goodService;
    }

    public function export()
    {
        $data = $this->goodService->get();
        foreach ($data as $row) {
            $data = $this->goodService->initRow($row);
        }
        return '導出';
    }
}
class Request {
    public function __get($name)
    {
        return$_POST[$name] ?? '';
    }
}

$service = new GoodService();
$service->paginate(new Request(), 10);
$export = new Export($service);
$export->export();

 

 

 

 

 

/*********************第二個版本*********************/

/**中介者模式，使GoodService orderService Export 相互之間 解耦，不直接new，而是通過中介者Mediator去拿這些客戶端傳入的new對象
 * Class AbstarctMediator
 */

class AbstarctMediator
{
    protected $mediator;
    public function __construct(Mediator $mediator)
    {
        $this->mediator;
    }

    /**
     * @return Mediator
     */
    public function getMediator()
    {
        return $this->mediator;
    }
}

class GoodService extends AbstarctMediator
{
    public function paginate($perPage = 10)
    {
        $good = $this->getMediator()->getGoodModel();
        $request = $this->getMediator()->getRequest();
        $query = $good->query();
        if ($request->name) {
            $query->where('name', $request->name);
        }
        $paginate = $query->paginate($perPage);
        foreach ($paginate as &$row)
        {
            $row = $this->initRow($row);
        }
        return $row;
    }

    public function initRow($row)
    {
        $row->sum = 0;
        if ($row->id) {
            $row->sum = $this->getMediator()->sumByGoodId($row->id);
        }
        return $row;
    }

    public function get()
    {
        $good = $this->getMediator()->getGoodModel();
        $request = $this->getMediator()->getRequest();
        $query = $good->query();
        if ($request->name) {
            $query->where('name', $request->name);
        }
        $data = $query->get();
        foreach ($data as &$row) {
            $row = $this->initRow($row);
        }
        return $row;
    }
}


class GoodModel
{
    public function query()
    {
        return $this;
    }
    public function where($file, $value)
    {
        return $this;
    }
    public function paginate()
    {
        return [];
    }
    public function get()
    {
        return [];
    }
}

class OrderModel
{
    public function query()
    {
        return $this;
    }
    public function where($file, $value)
    {
        return $this;
    }
    public function sum()
    {
        return 10;
    }
}


class OrderService extends AbstarctMediator
{
    public function sumByGoodsId($goodId)
    {
        $orderModel = $this->getMediator()->getOrderModel();
        return $orderModel->query()->where('good_id', $goodId)->sum();
    }
}

class Export extends AbstarctMediator
{

    public function export()
    {
        $data = $this->getMediator()->get->get();
        foreach ($data as $row) {
            $data = $this->goodService->initRow($row);
        }
        return '導出';
    }
}
class Request {
    public function __get($name)
    {
        return$_POST[$name] ?? '';
    }
}

class Mediator
{
    /**
     * @var GoodService
     */
    protected $goodService;
    /**
     * @var GoodModel
     */
    protected $goodModel;
    /**
     * @var OrderService
     */
    protected $orderService;
    /**
     * @var OrderModel
     */
    protected $orderModel;
    /**
     * @var Request
     */
    protected $request;
    /**
     * @var Export
     */
    protected $export;


    public function setMedia(
        GoodService $goodService,
        GoodModel $goodModel,
        OrderService $orderService,
        OrderModel $orderModel,
        Request $request,
        Export $export
    )
    {
        $this->goodService  = $goodService;
        $this->goodModel    = $goodModel;
        $this->orderService = $orderService;
        $this->orderModel   = $orderModel;
        $this->request      = $request;
        $this->export       = $export;
    }

    public function getGoodService()
    {
        return $this->goodService;
    }

    public function getGoodModel()
    {
        return $this->goodModel;
    }

    public function getOrderService()
    {
        return $this->orderService;
    }

    public function getOrderModel()
    {
        return $this->orderModel;
    }

    public function getRequest()
    {
        return $this->request;
    }

    public function sumByGoodId($goodId)
    {
        return $this->orderService->sumByGoodsId($goodId);
    }

    public function export()
    {
        return $this->export->export();
    }
}

$mediator = new Mediator();
$orderModel = new OrderModel();
$goodModel = new GoodModel();
$goodService = new GoodService($mediator);
$orderService = new OrderService($mediator);
$export = new Export($mediator);
$request = new Request();

$mediator->setMedia(
    $goodService,
    $goodModel,
    $orderService,
    $orderModel,
    $request,
    $export
);

$goodService->paginate(10);
$export->export();

 

 

 

/***************************第三個版本***************************/

/**外觀模式 , 爲了客戶端能簡單調用，則用外觀模式，讓看起來很簡單去調用
 * Class Action
 */
class Action
{
    /**
     * @var Mediator
     */
    protected $mediator;
    /**
     * @var GoodService
     */
    protected $goodService;
    /**
     * @var GoodModel
     */
    protected $goodModel;
    /**
     * @var OrderService
     */
    protected $orderService;
    /**
     * @var OrderModel
     */
    protected $orderModel;
    /**
     * @var Request
     */
    protected $request;
    /**
     * @var Export
     */
    protected $export;
    public function __construct()
    {
        $this->mediator = new Mediator();
        $this->orderModel = new OrderModel();
        $this->goodModel = new GoodModel();
        $this->goodService = new GoodService($this->mediator);
        $this->orderService = new OrderService($this->mediator);
        $this->export = new Export($this->mediator);
        $this->request = new Request();

        $this->mediator->setMedia(
            $this->goodService,
            $this->goodModel,
            $this->orderService,
            $this->orderModel,
            $this->request,
            $this->export
        );
    }

    public function paginate($perpage = 10)
    {
        return $this->goodService->paginate($perpage);
    }
    public function export()
    {
        return $this->export->export();
    }
}

$action = new Action();
//分頁顯示
$action->paginate(10);
//導出
$action->export();