Merge pull request #289 from armino-dev/add-paypal-oauth-provider

Added PayPal OAuth provider

app/config/providers.php

@@ -127,6 +127,12 @@ return [
         'enabled' => false,
         'mock' => false
     ],
+    'paypal' => [
+        'developers' => 'https://developer.paypal.com/docs/api/overview/',
+        'icon' => 'icon-paypal',
+        'enabled' => true,
+        'mock' => false
+    ],
     // Keep Last
     'mock' => [
         'developers' => 'https://appwrite.io',

src/Auth/OAuth/Paypal.php

@@ -0,0 +1,164 @@
+<?php
+
+namespace Auth\OAuth;
+
+use Auth\OAuth;
+
+// Reference Material
+// https://developer.paypal.com/docs/api/overview/
+
+class Paypal extends OAuth
+{
+    /**
+     * @var string
+     */
+    private $endpoint= [
+        'sandbox' => 'https://www.sandbox.paypal.com/',
+        'live' => 'https://www.paypal.com/',
+    ];
+
+    private $resourceEndpoint = [
+        'sandbox' => 'https://api.sandbox.paypal.com/v1/',
+        'live' => 'https://api.paypal.com/v1/',
+    ];
+
+    private $environment = 'live';
+
+    /**
+     * @var array
+     */
+    protected $user = [];
+
+
+    protected $scopes = [
+            'openid',
+            'profile',
+            'email'
+    ];
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return 'paypal';
+    }
+
+    /**
+     * @return string
+     */
+    public function getLoginURL(): string
+    {
+        $url = $this->endpoint[$this->environment] . 'connect/?'.
+            http_build_query([
+                'flowEntry' => 'static',
+                'response_type' => 'code',
+                'client_id' => $this->appID,
+                'scope' => implode(' ', $this->getScopes()),
+                // paypal is not accepting localhost string into return uri
+                'redirect_uri' => str_replace("localhost", "127.0.0.1", $this->callback),
+                'state' => json_encode($this->state),
+            ]);
+
+        return $url;
+    }
+
+    /**
+     * @param string $code
+     *
+     * @return string
+     */
+    public function getAccessToken(string $code): string
+    {
+        $accessToken = $this->request(
+            'POST',
+            $this->resourceEndpoint[$this->environment] . 'oauth2/token',
+            ['Authorization: Basic ' . base64_encode($this->appID . ':' . $this->appSecret)],
+            http_build_query([
+                'code' => $code,
+                'grant_type' => 'authorization_code',
+            ])
+        );
+
+
+        $accessToken = json_decode($accessToken, true);
+
+
+        if (isset($accessToken['access_token'])) {
+            return $accessToken['access_token'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param string $accessToken
+     *
+     * @return string
+     */
+    public function getUserID(string $accessToken): string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['payer_id'])) {
+            return $user['payer_id'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param string $accessToken
+     *
+     * @return string
+     */
+    public function getUserEmail(string $accessToken): string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['emails'])) {
+            return $user['emails'][0]['value'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param string $accessToken
+     *
+     * @return string
+     */
+    public function getUserName(string $accessToken): string
+    {
+        $user = $this->getUser($accessToken);
+
+        if (isset($user['name'])) {
+            return $user['name'];
+        }
+
+        return '';
+    }
+
+    /**
+     * @param string $accessToken
+     *
+     * @return array
+     */
+    protected function getUser(string $accessToken): array
+    {
+        $header = [
+            'Content-Type: application/json',
+            'Authorization: Bearer '.urlencode($accessToken),
+        ];
+        if (empty($this->user)) {
+            $user = $this->request(
+                'GET',
+                $this->resourceEndpoint[$this->environment] . 'identity/oauth2/userinfo?schema=paypalv1.1',
+                $header
+            );
+            $this->user = json_decode($user, true);
+        }
+
+        return $this->user;
+    }
+}