Add files to repo which were missed earlier

Author: ADmad

src/Datasource/Connection.php

@@ -0,0 +1,84 @@
+<?php
+declare(strict_types=1);
+
+namespace Muffin\Webservice\Datasource;
+
+use Cake\Core\App;
+use Muffin\Webservice\Datasource\Exception\MissingConnectionException;
+use Muffin\Webservice\Webservice\Driver\AbstractDriver;
+use Muffin\Webservice\Webservice\Exception\MissingDriverException;
+use Muffin\Webservice\Webservice\Exception\UnexpectedDriverException;
+
+/**
+ * Class Connection
+ *
+ * @method \Muffin\Webservice\Webservice\Driver\AbstractDriver setWebservice(string $name, \Muffin\Webservice\Webservice\WebserviceInterface $webservice) Proxy method through to the Driver
+ * @method \Muffin\Webservice\Webservice\WebserviceInterface getWebservice(string $name) Proxy method through to the Driver
+ * @method string configName() Proxy method through to the Driver
+ */
+class Connection
+{
+    /**
+     * Driver
+     *
+     * @var \Muffin\Webservice\Webservice\Driver\AbstractDriver
+     */
+    protected $_driver;
+
+    /**
+     * Constructor
+     *
+     * @param array $config Custom configuration.
+     * @throws \Muffin\Webservice\Webservice\Exception\UnexpectedDriverException If the driver is not an instance of `Muffin\Webservice\AbstractDriver`.
+     */
+    public function __construct(array $config)
+    {
+        $config = $this->_normalizeConfig($config);
+        /** @psalm-var class-string<\Muffin\Webservice\Webservice\Driver\AbstractDriver> */
+        $driver = $config['driver'];
+        unset($config['driver'], $config['service']);
+
+        $this->_driver = new $driver($config);
+
+        /** @psalm-suppress TypeDoesNotContainType */
+        if (!($this->_driver instanceof AbstractDriver)) {
+            throw new UnexpectedDriverException(['driver' => $driver]);
+        }
+    }
+
+    /**
+     * Validates certain custom configuration values.
+     *
+     * @param array $config Raw custom configuration.
+     * @return array
+     * @throws \Muffin\Webservice\Datasource\Exception\MissingConnectionException If the connection does not exist.
+     * @throws \Muffin\Webservice\Webservice\Exception\MissingDriverException If the driver does not exist.
+     */
+    protected function _normalizeConfig(array $config): array
+    {
+        if (empty($config['driver'])) {
+            if (empty($config['service'])) {
+                throw new MissingConnectionException(['name' => $config['name']]);
+            }
+
+            $config['driver'] = App::className($config['service'], 'Webservice/Driver');
+            if (!$config['driver']) {
+                throw new MissingDriverException(['driver' => $config['driver']]);
+            }
+        }
+
+        return $config;
+    }
+
+    /**
+     * Proxies the driver's methods.
+     *
+     * @param string $method Method name.
+     * @param array $args Arguments to pass-through
+     * @return mixed
+     */
+    public function __call($method, $args)
+    {
+        return call_user_func_array([$this->_driver, $method], $args);
+    }
+}