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<?php |
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/** |
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* Class BookCollection |
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* |
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* @author Denis Shestakov <[email protected]> |
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* @copyright Copyright (c) 2017, Lan Publishing |
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* @license MIT |
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*/ |
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namespace Lan\Ebs\Sdk\Classes; |
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use ArrayObject; |
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use Exception; |
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use Lan\Ebs\Sdk\Client; |
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use Lan\Ebs\Sdk\Common; |
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use ReflectionClass; |
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/** |
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* Абстрактный класс для всех коллекций (+ итерируемый) |
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* |
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* @package Lan\Ebs |
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* @subpackage Sdk |
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* @category Classes |
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*/ |
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abstract class Collection extends ArrayObject implements Common |
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{ |
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/** |
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* Инстанс клиента API |
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* |
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* @var Client |
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*/ |
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private $client; |
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/** |
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* Флаг, сигнализирующий что коллекция загружена |
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* |
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* @var int |
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*/ |
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private $loadStatus = 0; |
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/** |
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* Имена полей, подлежаших получению через API |
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* |
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* @var array |
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*/ |
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private $fields = []; |
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/** |
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* Класс модели |
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* |
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* @var Model|string |
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*/ |
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private $class = null; |
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/** |
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* Лимит получаемых моделей коллекции через API |
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* |
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* @var int |
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*/ |
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private $limit = null; |
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/** |
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* Смещение выборки моделей через API |
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* |
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* @var int |
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*/ |
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private $offset = null; |
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/** |
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* Всего элементов без учета лимита |
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* |
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* @var int |
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*/ |
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private $fullCount = null; |
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/** |
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* Конструктор коллекции |
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* |
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* @param Client $client Инстанс клиента |
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* @param array $fields Поля для выборки |
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* @param string $class Класс модели |
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* @param int $limit Лимит выборки |
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* @param int $offset Смещение выборки |
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* |
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* @throws Exception |
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*/ |
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public function __construct(Client $client, array $fields, $class, $limit, $offset) |
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{ |
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if (!$client) { |
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throw new Exception('Клиент не инициализирован'); |
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} |
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if (!is_array($fields)) { |
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throw new Exception('Fields for model of collection mast be array'); |
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} |
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$reflectionClass = new ReflectionClass($class); |
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if (!$reflectionClass->isSubclassOf(Model::class)) { |
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throw new Exception('Class of model collection not subclass for Model'); |
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} |
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$this->client = $client; |
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$this->fields = $fields; |
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$this->class = $class; |
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$this->setLimit($limit); |
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$this->setOffset($offset); |
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} |
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/** |
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* Установка лимита выборки |
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* |
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* @param int $limit Значение лимита выборки |
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* |
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* @throws Exception |
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*/ |
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public function setLimit($limit) |
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{ |
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$this->limit = $limit; |
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if ($this->loadStatus == 200) { |
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$this->load(true); |
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} |
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} |
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/** |
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* Загрузка коллекции |
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* |
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* @param bool $force Заново загружать коллекцию даже если она загружена ранее |
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* |
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* @return $this |
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* |
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* @throws Exception |
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*/ |
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public function load($force = false) |
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{ |
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if ($this->loadStatus == 200 && !$force) { |
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return $this; |
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} |
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$params = [ |
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'limit' => $this->limit, |
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'offset' => $this->offset |
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]; |
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if (!empty($this->fields)) { |
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$params['fields'] = implode(',', (array)$this->fields); |
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} |
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$response = $this->client->getResponse($this->getUrl(__FUNCTION__), $params); |
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$this->exchangeArray($response['data']); |
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$this->loadStatus = $response['status']; |
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$this->fullCount = $response['count']; |
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unset($response); |
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return $this; |
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} |
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/** |
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* Установка смещения выборки |
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* |
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* @param int $offset Значение смещения выборки |
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* |
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* @throws Exception |
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*/ |
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public function setOffset($offset) |
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{ |
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$this->offset = $offset; |
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if ($this->loadStatus == 200) { |
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$this->load(true); |
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} |
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} |
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/** |
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* Получение количества всех элементов без учета лимита |
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* |
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* @return int |
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* |
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* @throws Exception |
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*/ |
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public function getFullCount() |
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{ |
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$this->load(); |
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return $this->fullCount; |
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} |
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/** |
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* Получение нового инстанса итератора коллекции |
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* |
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* @return CollectionIterator |
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*/ |
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public function getIterator() |
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{ |
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return new CollectionIterator($this); |
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} |
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/** |
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* Количество моделей в коллекции |
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* |
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* @return int |
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* |
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* @throws Exception |
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*/ |
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public function count() |
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{ |
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$this->load(); |
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return parent::count(); |
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} |
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/** |
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* Получение коллекции в виде массива |
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* |
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* @return array |
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* |
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* @throws Exception |
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*/ |
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public function getData() |
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{ |
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$this->load(); |
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return $this->getArrayCopy(); |
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} |
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/** |
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* Получение первой модели в коллекции |
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* |
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* @return Model |
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* |
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* @throws Exception |
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*/ |
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public function reset() |
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{ |
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$this->load(); |
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return $this->createModel(reset($this)); |
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} |
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/** |
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* Создание модели по переданным данным |
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* |
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* @param array $data Данные для создания модели |
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* |
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* @return Model |
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* |
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* @throws Exception |
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*/ |
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public function createModel(array $data = null) |
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{ |
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$class = $this->class; |
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/** |
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* @var Model $model |
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*/ |
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$model = new $class($this->client, $this->fields); |
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$model->set($data === null ? current($this) : $data); |
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return $model; |
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} |
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/** |
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* Получение последней модели в коллекции |
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* |
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* @return Model |
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* |
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* @throws Exception |
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*/ |
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public function end() |
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{ |
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$this->load(); |
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return $this->createModel(end($this)); |
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} |
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/** |
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* Получение инстанса клиента |
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* |
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* @return Client |
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*/ |
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protected function getClient() |
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{ |
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return $this->client; |
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} |
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} |