Added Wordpress OAuth2 provider

app/config/providers.php

@@ -224,5 +224,14 @@ return [ // Ordered by ABC.
         'form' => false,
         'beta' => false,
         'mock' => true,
+    ],
+    'wordpress' => [
+        'name' => 'Wordpress',
+        'developers' => 'https://developer.wordpress.com/docs/oauth2/',
+        'icon' => 'icon-wordpress',
+        'enabled' => true,
+        'form' => false,
+        'beta' => false,
+        'mock' => false
     ]
 ];

src/Appwrite/Auth/OAuth2/Wordpress.php

@@ -0,0 +1,133 @@
+<?php
+
+namespace Appwrite\Auth\OAuth2;
+
+use Appwrite\Auth\OAuth2;
+
+class Wordpress extends OAuth2
+{
+    /**
+     * @var array
+     */
+    protected $user = [];
+
+    /**
+     * @var array
+     */
+    protected $scopes = [
+        'auth',
+    ];
+
+    /**
+     * @return string
+     */
+    public function getName():string
+    {
+        return 'wordpress';
+    }
+
+    /**
+     * @return string
+     */
+    public function getLoginURL():string
+    {
+        return 'https://public-api.wordpress.com/oauth2/authorize?'. \http_build_query([
+            'client_id' => $this->appID,
+            'redirect_uri' => $this->callback,
+            'response_type' => 'code',
+            'scope' => $this->getScopes(),
+            'state' => \json_encode($this->state)
+        ]);
+    }
+
+    /**
+     * @param string $code
+     *
+     * @return string
+     */
+    public function getAccessToken(string $code):string
+    {
+        $accessToken = $this->request(
+            'POST',
+            'https://public-api.wordpress.com/oauth2/token',
+            [],
+            \http_build_query([
+                'client_id' => $this->appID,
+                'redirect_uri' => $this->callback,
+                'client_secret' => $this->appSecret,
+                'grant_type' => 'authorization_code',
+                'code' => $code
+            ])
+        );
+
+        $accessToken = \json_decode($accessToken, true);
+
+        if (isset($accessToken['access_token'])) {
+            return $accessToken['access_token'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param $accessToken
+     *
+     * @return string
+     */
+    public function getUserID(string $accessToken):string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['ID'])) {
+            return $user['ID'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param $accessToken
+     *
+     * @return string
+     */
+    public function getUserEmail(string $accessToken):string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['email']) && $user['verified']) {
+            return $user['email'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param $accessToken
+     *
+     * @return string
+     */
+    public function getUserName(string $accessToken):string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['username'])) {
+            return $user['username'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param string $accessToken
+     *
+     * @return array
+     */
+    protected function getUser(string $accessToken)
+    {
+        if (empty($this->user)) {
+            $this->user = \json_decode($this->request('GET', 'https://public-api.wordpress.com/rest/v1/me', ['Authorization: Bearer '.$accessToken]), true);
+        }
+
+        return $this->user;
+    }
+}