First commit of new examples

examples/src/Repositories/ClientRepository.php

@@ -0,0 +1,51 @@
+<?php
+namespace OAuth2ServerExamples\Repositories;
+
+use League\OAuth2\Server\Entities\ClientEntity;
+use League\OAuth2\Server\Repositories\ClientRepositoryInterface;
+
+class ClientRepository implements ClientRepositoryInterface
+{
+    /**
+     * Get a client
+     *
+     * @param string $clientIdentifier The client's identifier
+     * @param string $clientSecret     The client's secret (default = "null")
+     * @param string $redirectUri      The client's redirect URI (default = "null")
+     * @param string $grantType        The grant type used (default = "null")
+     *
+     * @return \League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface
+     */
+    public function get($clientIdentifier, $clientSecret = null, $redirectUri = null, $grantType = null)
+    {
+        $clients = [
+            'myawesomeapp' => [
+                'secret'       => password_hash('abc123', PASSWORD_BCRYPT),
+                'name'         => 'My Awesome App',
+                'redirect_uri' => ''
+            ]
+        ];
+
+        // Check if client is registered
+        if (array_key_exists($clientIdentifier, $clients) === false) {
+            return null;
+        }
+
+        // Check if client secret is valid
+        if ($clientSecret !== null && password_verify($clientSecret, $clients[$clientIdentifier]['secret']) === false) {
+            return null;
+        }
+
+        // Check if redirect URI is valid
+        if ($redirectUri !== null && $redirectUri !== $clients[$clientIdentifier]['redirectUri']) {
+            return null;
+        }
+
+        $client = new ClientEntity();
+        $client->setIdentifier($clientIdentifier);
+        $client->setName($clients[$clientIdentifier]['name']);
+        $client->setSecret($clients[$clientIdentifier]['secret']);
+
+        return $client;
+    }
+}