Add support for Oauth 1.0

Added new Config model that cna pre-configure Oauth 1.0 auth, with
package suggestion in composer.json

Author: rdohms

composer.json

@@ -22,7 +22,11 @@
         "symfony/console": "~2.2",
         "phpunit/phpunit": "^4.8",
         "symfony/var-dumper": "~2.6",
-        "mathiasgrimm/arraypath": "~1.3"
+        "mathiasgrimm/arraypath": "~1.3",
+        "guzzlehttp/oauth-subscriber": "^0.3.0"
+    },
+    "suggest": {
+        "guzzlehttp/oauth-subscriber": "For authenticating with Oauth1.0"
     },
 
     "autoload": {

composer.lock

@@ -0,0 +1,146 @@
+<?php
+
+namespace DMS\Service\Meetup\Config;
+
+use DMS\Service\Meetup\Exception\MissingPackageException;
+use GuzzleHttp\Subscriber\Oauth\Oauth1;
+
+final class OAuth1Config implements ClientConfig
+{
+    /**
+     * @var string
+     */
+    protected $consumerKey;
+
+    /**
+     * @var string
+     */
+    protected $consumerSecret;
+
+    /**
+     * @var string
+     */
+    protected $token;
+
+    /**
+     * @var string
+     */
+    protected $tokenSecret;
+
+    /**
+     * @var string
+     */
+    protected $privateKeyFile;
+
+    /**
+     * @var string
+     */
+    protected $privateKeyPassphrase;
+
+    /**
+     * @var string
+     */
+    protected $signatureMethod;
+
+    /**
+     * @var bool
+     */
+    protected $shouldSignAllRequests = true;
+
+    /**
+     * @param string $consumerKey
+     * @param string $consumerSecret
+     */
+    private function __construct($consumerKey, $consumerSecret)
+    {
+        if (!class_exists(Oauth1::class)) {
+            MissingPackageException::forOAuth1();
+        }
+
+        $this->consumerKey    = $consumerKey;
+        $this->consumerSecret = $consumerSecret;
+    }
+
+    public static function withTwoLeggedOauth(string $consumerKey, string $consumerSecret): self
+    {
+        $instance = new static($consumerKey, $consumerSecret);
+        $instance->tokenSecret = false;
+        return $instance;
+    }
+
+    public static function withToken(
+        string $consumerKey,
+        string $consumerSecret,
+        string $token,
+        string $tokenSecret
+    ): self {
+        $instance              = new static($consumerKey, $consumerSecret);
+        $instance->token       = $token;
+        $instance->tokenSecret = $tokenSecret;
+        return $instance;
+    }
+
+    public static function withRSASH1(
+        string $consumerKey,
+        string $consumerSecret,
+        string $privateKeyFile,
+        string $privateKeyPassphrase
+    ): self {
+        $instance                       = new static($consumerKey, $consumerSecret);
+        $instance->privateKeyFile       = $privateKeyFile;
+        $instance->privateKeyPassphrase = $privateKeyPassphrase;
+        $instance->signatureMethod      = Oauth1::SIGNATURE_METHOD_RSA;
+        return $instance;
+    }
+
+    /**
+     * @return callable[]
+     */
+    public function getMiddleware(): array
+    {
+        return [
+            'OAuth1' => new Oauth1($this->buildConfig()),
+        ];
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getClientConfig(): array
+    {
+        $config = [];
+
+        if ($this->shouldSignAllRequests) {
+            $config['auth'] = 'oauth';
+        }
+
+        return $config;
+    }
+
+    private function buildConfig(): array
+    {
+        $config = [
+            'consumer_key'    => $this->consumerKey,
+            'consumer_secret' => $this->consumerSecret,
+        ];
+
+        if ($this->signatureMethod !== null) {
+            $config['signature_method'] = $this->signatureMethod;
+        }
+
+        if ($this->signatureMethod === Oauth1::SIGNATURE_METHOD_RSA) {
+            $config['private_key_file'] = $this->privateKeyFile;
+            $config['private_key_passphrase'] = $this->privateKeyPassphrase;
+        }
+
+        if ($this->token !== null) {
+            $config['token'] = $this->token;
+        }
+
+        if ($this->tokenSecret !== null) {
+            $config['token_secret'] = $this->tokenSecret;
+        }
+
+        return $config;
+    }
+}

src/DMS/Service/Meetup/Config/OAuth1Config.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace DMS\Service\Meetup\Exception;
+
+final class MissingPackageException extends \Exception
+{
+    public static function forOAuth1(): self
+    {
+        return new static("Please install the guzzlehttp/oauth-subscriber package to use this Auth method");
+    }
+}