From 6f4b2f0ac2f235332c850b050d9e4563fc71f89d Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@controlyourself.ca>
Date: Sat, 1 Aug 2009 08:20:44 +0000
Subject: Twitter OAuth server dance working

---
 actions/twitterauthorization.php | 136 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 actions/twitterauthorization.php

(limited to 'actions/twitterauthorization.php')

diff --git a/actions/twitterauthorization.php b/actions/twitterauthorization.php
new file mode 100644
index 000000000..f19cd7f65
--- /dev/null
+++ b/actions/twitterauthorization.php
@@ -0,0 +1,136 @@
+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Class for doing OAuth authentication against Twitter
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  TwitterauthorizationAction
+ * @package   Laconica
+ * @author    Zach Copely <zach@controlyourself.ca>
+ * @copyright 2009 Control Yourself, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://laconi.ca/
+ */
+
+if (!defined('LACONICA')) {
+    exit(1);
+}
+
+class TwitterauthorizationAction extends Action
+{
+
+    function prepare($args)
+    {
+        parent::prepare($args);
+
+        $this->oauth_token = $this->arg('oauth_token');
+
+        return true;
+    }
+
+    function handle($args)
+    {
+        parent::handle($args);
+
+        if (!common_logged_in()) {
+            $this->clientError(_('Not logged in.'), 403);
+        }
+
+        $user = common_current_user();
+        $flink = Foreign_link::getByUserID($user->id, TWITTER_SERVICE);
+
+        // If there's already a foreign link record, it means we already
+        // have an access token, and this is unecessary. So go back.
+
+        if (isset($flink)) {
+            common_redirect(common_local_url('twittersettings'));
+        }
+
+        // $this->oauth_token is only populated once Twitter authorizes our
+        // request token. If it's empty we're at the beginning of the auth
+        // process
+
+        if (empty($this->oauth_token)) {
+
+            // Get a new request token and authorize it
+
+            $client = new TwitterOAuthClient();
+            $req_tok = $client->getRequestToken();
+
+            // Sock the request token away in the session temporarily
+
+            $_SESSION['twitter_request_token'] = $req_tok->key;
+            $_SESSION['twitter_request_token_secret'] = $req_tok->key;
+
+            $auth_link = $client->getAuthorizeLink($req_tok);
+            common_redirect($auth_link);
+
+        } else {
+
+            // Check to make sure Twitter sent us the same request token we sent
+
+            if ($_SESSION['twitter_request_token'] != $this->oauth_token) {
+                $this->serverError(_('Couldn\'t link your Twitter account.'));
+            }
+
+            $client = new TwitterOAuthClient($_SESSION['twitter_request_token'],
+                $_SESSION['twitter_request_token_secret']);
+
+            // Exchange the request token for an access token
+
+            $atok = $client->getAccessToken();
+
+            // Save the access token and Twitter user info
+
+            $client = new TwitterOAuthClient($atok->key, $atok->secret);
+
+            $twitter_user = $client->verify_credentials();
+
+            $user = common_current_user();
+
+            $flink = new Foreign_link();
+
+            $flink->user_id     = $user->id;
+            $flink->foreign_id  = $twitter_user->id;
+            $flink->service     = TWITTER_SERVICE;
+            $flink->token       = $atok->key;
+            $flink->credentials = $atok->secret;
+            $flink->created     = common_sql_now();
+
+            $flink->set_flags(true, false, false, false);
+
+            $flink_id = $flink->insert();
+
+            if (empty($flink_id)) {
+                common_log_db_error($flink, 'INSERT', __FILE__);
+                $this->serverError(_('Couldn\'t link your Twitter account.'));
+            }
+
+            save_twitter_user($twitter_user->id, $twitter_user->screen_name);
+
+            // clean up the the mess we made in the session
+
+            unset($_SESSION['twitter_request_token']);
+            unset($_SESSION['twitter_request_token_secret']);
+
+            common_redirect(common_local_url('twittersettings'));
+        }
+    }
+
+}
+
-- 
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