Pluginized Twitter settings stuff

1 files changed, 222 insertions, 0 deletions

diff --git a/plugins/TwitterBridge/twitterauthorization.php b/plugins/TwitterBridge/twitterauthorization.php
new file mode 100644
index 000000000..b04f35327
--- /dev/null
+++ b/plugins/TwitterBridge/twitterauthorization.php
@@ -0,0 +1,222 @@
+<?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  Twitter
+ * @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 for doing OAuth authentication against Twitter
+ *
+ * Peforms the OAuth "dance" between Laconica and Twitter -- requests a token,
+ * authorizes it, and exchanges it for an access token.  It also creates a link
+ * (Foreign_link) between the Laconica user and Twitter user and stores the
+ * access token and secret in the link.
+ *
+ * @category Twitter
+ * @package  Laconica
+ * @author   Zach Copley <zach@controlyourself.ca>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://laconi.ca/
+ *
+ */
+class TwitterauthorizationAction extends Action
+{
+    /**
+     * Initialize class members. Looks for 'oauth_token' parameter.
+     *
+     * @param array $args misc. arguments
+     *
+     * @return boolean true
+     */
+    function prepare($args)
+    {
+        parent::prepare($args);
+
+        $this->oauth_token = $this->arg('oauth_token');
+
+        return true;
+    }
+
+    /**
+     * Handler method
+     *
+     * @param array $args is ignored since it's now passed in in prepare()
+     *
+     * @return nothing
+     */
+    function handle($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)) {
+            $this->authorizeRequestToken();
+        } else {
+            $this->saveAccessToken();
+        }
+    }
+
+    /**
+     * Asks Twitter for a request token, and then redirects to Twitter
+     * to authorize it.
+     *
+     * @return nothing
+     */
+    function authorizeRequestToken()
+    {
+        try {
+
+            // Get a new request token and authorize it
+
+            $client  = new TwitterOAuthClient();
+            $req_tok =
+              $client->getRequestToken(TwitterOAuthClient::$requestTokenURL);
+
+            // Sock the request token away in the session temporarily
+
+            $_SESSION['twitter_request_token']        = $req_tok->key;
+            $_SESSION['twitter_request_token_secret'] = $req_tok->secret;
+
+            $auth_link = $client->getAuthorizeLink($req_tok);
+
+        } catch (TwitterOAuthClientException $e) {
+            $msg = sprintf('OAuth client cURL error - code: %1s, msg: %2s',
+                           $e->getCode(), $e->getMessage());
+            $this->serverError(_('Couldn\'t link your Twitter account.'));
+        }
+
+        common_redirect($auth_link);
+    }
+
+    /**
+     * Called when Twitter returns an authorized request token. Exchanges
+     * it for an access token and stores it.
+     *
+     * @return nothing
+     */
+    function saveAccessToken()
+    {
+
+        // Check to make sure Twitter returned the same request
+        // token we sent them
+
+        if ($_SESSION['twitter_request_token'] != $this->oauth_token) {
+            $this->serverError(_('Couldn\'t link your Twitter account.'));
+        }
+
+        try {
+
+            $client = new TwitterOAuthClient($_SESSION['twitter_request_token'],
+                $_SESSION['twitter_request_token_secret']);
+
+            // Exchange the request token for an access token
+
+            $atok = $client->getAccessToken(TwitterOAuthClient::$accessTokenURL);
+
+            // Test the access token and get the user's Twitter info
+
+            $client       = new TwitterOAuthClient($atok->key, $atok->secret);
+            $twitter_user = $client->verifyCredentials();
+
+        } catch (OAuthClientException $e) {
+            $msg = sprintf('OAuth client cURL error - code: %1$s, msg: %2$s',
+                           $e->getCode(), $e->getMessage());
+            $this->serverError(_('Couldn\'t link your Twitter account.'));
+        }
+
+        // Save the access token and Twitter user info
+
+        $this->saveForeignLink($atok, $twitter_user);
+
+        // Clean up the the mess we made in the session
+
+        unset($_SESSION['twitter_request_token']);
+        unset($_SESSION['twitter_request_token_secret']);
+
+        common_redirect(common_local_url('twittersettings'));
+    }
+
+    /**
+     * Saves a Foreign_link between Twitter user and local user,
+     * which includes the access token and secret.
+     *
+     * @param OAuthToken $access_token the access token to save
+     * @param mixed      $twitter_user twitter API user object
+     *
+     * @return nothing
+     */
+    function saveForeignLink($access_token, $twitter_user)
+    {
+        $user = common_current_user();
+
+        $flink = new Foreign_link();
+
+        $flink->user_id     = $user->id;
+        $flink->foreign_id  = $twitter_user->id;
+        $flink->service     = TWITTER_SERVICE;
+
+        $creds = TwitterOAuthClient::packToken($access_token);
+
+        $flink->credentials = $creds;
+        $flink->created     = common_sql_now();
+
+        // Defaults: noticesync on, everything else off
+
+        $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);
+    }
+
+}
+