Initial Commit

class/payment/paypal/lib/PayPalCheckoutSdk/Core/AccessToken.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+
+class AccessToken
+{
+    public $token;
+    public $tokenType;
+    public $expiresIn;
+    private $createDate;
+
+    public function __construct($token, $tokenType, $expiresIn)
+    {
+        $this->token = $token;
+        $this->tokenType = $tokenType;
+        $this->expiresIn = $expiresIn;
+        $this->createDate = time();
+    }
+
+    public function isExpired()
+    {
+        return time() >= $this->createDate + $this->expiresIn;
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/AccessTokenRequest.php

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+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\HttpRequest;
+
+class AccessTokenRequest extends HttpRequest
+{
+    public function __construct(PayPalEnvironment $environment, $refreshToken = NULL)
+    {
+        parent::__construct("/v1/oauth2/token", "POST");
+        $this->headers["Authorization"] = "Basic " . $environment->authorizationString();
+        $body = [
+            "grant_type" => "client_credentials"
+        ];
+
+        if (!is_null($refreshToken))
+        {
+            $body["grant_type"] = "refresh_token";
+            $body["refresh_token"] = $refreshToken;
+        }
+
+        $this->body = $body;
+        $this->headers["Content-Type"] = "application/x-www-form-urlencoded";
+    }
+}
+

class/payment/paypal/lib/PayPalCheckoutSdk/Core/AuthorizationInjector.php

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+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\HttpRequest;
+use PayPalHttp\Injector;
+use PayPalHttp\HttpClient;
+
+class AuthorizationInjector implements Injector
+{
+    private $client;
+    private $environment;
+    private $refreshToken;
+    public $accessToken;
+
+    public function __construct(HttpClient $client, PayPalEnvironment $environment, $refreshToken)
+    {
+        $this->client = $client;
+        $this->environment = $environment;
+        $this->refreshToken = $refreshToken;
+    }
+
+    public function inject($request)
+    {
+        if (!$this->hasAuthHeader($request) && !$this->isAuthRequest($request))
+        {
+            if (is_null($this->accessToken) || $this->accessToken->isExpired())
+            {
+                $this->accessToken = $this->fetchAccessToken();
+            }
+            $request->headers['Authorization'] = 'Bearer ' . $this->accessToken->token;
+        }
+    }
+
+    private function fetchAccessToken()
+    {
+        $accessTokenResponse = $this->client->execute(new AccessTokenRequest($this->environment, $this->refreshToken));
+        $accessToken = $accessTokenResponse->result;
+        return new AccessToken($accessToken->access_token, $accessToken->token_type, $accessToken->expires_in);
+    }
+
+    private function isAuthRequest($request)
+    {
+        return $request instanceof AccessTokenRequest || $request instanceof RefreshTokenRequest;
+    }
+
+    private function hasAuthHeader(HttpRequest $request)
+    {
+        return array_key_exists("Authorization", $request->headers);
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/FPTIInstrumentationInjector.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\Injector;
+
+class FPTIInstrumentationInjector implements Injector
+{
+    public function inject($request)
+    {
+        $request->headers["sdk_name"] = "Checkout SDK";
+        $request->headers["sdk_version"] = "1.0.1";
+        $request->headers["sdk_tech_stack"] = "PHP " . PHP_VERSION;
+        $request->headers["api_integration_type"] = "PAYPALSDK";
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/GzipInjector.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+
+use PayPalHttp\Injector;
+
+class GzipInjector implements Injector
+{
+    public function inject($httpRequest)
+    {
+        $httpRequest->headers["Accept-Encoding"] = "gzip";
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/PayPalEnvironment.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\Environment;
+
+abstract class PayPalEnvironment implements Environment
+{
+    private $clientId;
+    private $clientSecret;
+
+    public function __construct($clientId, $clientSecret)
+    {
+        $this->clientId = $clientId;
+        $this->clientSecret = $clientSecret;
+    }
+
+    public function authorizationString()
+    {
+        return base64_encode($this->clientId . ":" . $this->clientSecret);
+    }
+}
+

class/payment/paypal/lib/PayPalCheckoutSdk/Core/PayPalHttpClient.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\HttpClient;
+
+class PayPalHttpClient extends HttpClient
+{
+    private $refreshToken;
+    public $authInjector;
+
+    public function __construct(PayPalEnvironment $environment, $refreshToken = NULL)
+    {
+        parent::__construct($environment);
+        $this->refreshToken = $refreshToken;
+        $this->authInjector = new AuthorizationInjector($this, $environment, $refreshToken);
+        $this->addInjector($this->authInjector);
+        $this->addInjector(new GzipInjector());
+        $this->addInjector(new FPTIInstrumentationInjector());
+    }
+
+    public function userAgent()
+    {
+        return UserAgent::getValue();
+    }
+}
+

class/payment/paypal/lib/PayPalCheckoutSdk/Core/ProductionEnvironment.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+class ProductionEnvironment extends PayPalEnvironment
+{
+    public function __construct($clientId, $clientSecret)
+    {
+        parent::__construct($clientId, $clientSecret);
+    }
+
+    public function baseUrl()
+    {
+        return "https://api.paypal.com";
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/RefreshTokenRequest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+use PayPalHttp\HttpRequest;
+
+class RefreshTokenRequest extends HttpRequest
+{
+    public function __construct(PayPalEnvironment $environment, $authorizationCode)
+    {
+        parent::__construct("/v1/identity/openidconnect/tokenservice", "POST");
+        $this->headers["Authorization"] = "Basic " . $environment->authorizationString();
+        $this->headers["Content-Type"] = "application/x-www-form-urlencoded";
+        $this->body = [
+            "grant_type" => "authorization_code",
+            "code" => $authorizationCode
+        ];
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/SandboxEnvironment.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+class SandboxEnvironment extends PayPalEnvironment
+{
+    public function __construct($clientId, $clientSecret)
+    {
+        parent::__construct($clientId, $clientSecret);
+    }
+
+    public function baseUrl()
+    {
+        return "https://api.sandbox.paypal.com";
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/UserAgent.php

@@ -0,0 +1,52 @@
+<?php
+namespace PayPalCheckoutSdk\Core;
+
+/**
+ * Class PayPalUserAgent
+ * PayPalUserAgent generates User Agent for curl requests
+ *
+ * @package PayPal\Core
+ */
+class UserAgent
+{
+    /**
+     * Returns the value of the User-Agent header
+     * Add environment values and php version numbers
+     *
+     * @return string
+     */
+    public static function getValue()
+    {
+        $featureList = array(
+            'platform-ver=' . PHP_VERSION,
+            'bit=' . self::_getPHPBit(),
+            'os=' . str_replace(' ', '_', php_uname('s') . ' ' . php_uname('r')),
+            'machine=' . php_uname('m')
+        );
+        if (defined('OPENSSL_VERSION_TEXT')) {
+            $opensslVersion = explode(' ', OPENSSL_VERSION_TEXT);
+            $featureList[] = 'crypto-lib-ver=' . $opensslVersion[1];
+        }
+        if (function_exists('curl_version')) {
+            $curlVersion = curl_version();
+            $featureList[] = 'curl=' . $curlVersion['version'];
+        }
+        return sprintf("PayPalSDK/%s %s (%s)", "Checkout-PHP-SDK", Version::VERSION, implode('; ', $featureList));
+    }
+    /**
+     * Gets PHP Bit version
+     *
+     * @return int|string
+     */
+    private static function _getPHPBit()
+    {
+        switch (PHP_INT_SIZE) {
+            case 4:
+                return '32';
+            case 8:
+                return '64';
+            default:
+                return PHP_INT_SIZE;
+        }
+    }
+}

class/payment/paypal/lib/PayPalCheckoutSdk/Core/Version.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace PayPalCheckoutSdk\Core;
+
+class Version
+{
+    const VERSION = "1.0.1";
+}