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system/RESTful/BaseResource.php

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+<?php
+
+/**
+ * This file is part of the CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\RESTful;
+
+use CodeIgniter\Controller;
+use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\ResponseInterface;
+use Psr\Log\LoggerInterface;
+
+abstract class BaseResource extends Controller
+{
+	/**
+	 * @var string|null The model that holding this resource's data
+	 */
+	protected $modelName;
+
+	/**
+	 * @var object|null The model that holding this resource's data
+	 */
+	protected $model;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param RequestInterface  $request
+	 * @param ResponseInterface $response
+	 * @param LoggerInterface   $logger
+	 */
+	public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
+	{
+		parent::initController($request, $response, $logger);
+
+		// instantiate our model, if needed
+		$this->setModel($this->modelName);
+	}
+
+	/**
+	 * Set or change the model this controller is bound to.
+	 * Given either the name or the object, determine the other.
+	 *
+	 * @param object|string|null $which
+	 *
+	 * @return void
+	 */
+	public function setModel($which = null)
+	{
+		// save what we have been given
+		if ($which)
+		{
+			$this->model     = is_object($which) ? $which : null;
+			$this->modelName = is_object($which) ? null : $which;
+		}
+
+		// make a model object if needed
+		if (empty($this->model) && ! empty($this->modelName) && class_exists($this->modelName))
+		{
+			$this->model = model($this->modelName);
+		}
+
+		// determine model name if needed
+		if (! empty($this->model) && empty($this->modelName))
+		{
+			$this->modelName = get_class($this->model);
+		}
+	}
+}