First commit of relational example

examples/relational/Storage/ClientStorage.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace RelationalExample\Storage;
+
+use League\OAuth2\Server\Storage\ClientInterface;
+use League\OAuth2\Server\Storage\Adapter;
+use League\OAuth2\Server\Entity\ClientEntity;
+use League\OAuth2\Server\Entity\SessionEntity;
+
+use Illuminate\Database\Capsule\Manager as Capsule;
+
+class ClientStorage extends Adapter implements ClientInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function get($clientId, $clientSecret = null, $redirectUri = null, $grantType = null)
+    {
+        die(var_dump(__METHOD__, func_get_args()));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getBySession(SessionEntity $session)
+    {
+        $result = Capsule::table('oauth_clients')
+                            ->select(['oauth_clients.id', 'oauth_clients.name'])
+                            ->join('oauth_sessions', 'oauth_clients.id', '=', 'oauth_sessions.client_id')
+                            ->where('oauth_sessions.id', $session->getId())
+                            ->get();
+
+        if (count($result) === 1) {
+            $client = new ClientEntity($this->server);
+            $client->setId($result[0]['id']);
+            $client->setName($result[0]['name']);
+
+            return $client;
+        }
+    }
+}