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+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, Inc.
+ *
+ * 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/>.
+ */
+
+if (!defined('LACONICA')) { exit(1); }
+
+function get_twitter_data($uri, $screen_name, $password) {
+
+ $options = array(
+ CURLOPT_USERPWD => sprintf("%s:%s", $screen_name, $password),
+ CURLOPT_RETURNTRANSFER => true,
+ CURLOPT_FAILONERROR => true,
+ CURLOPT_HEADER => false,
+ CURLOPT_FOLLOWLOCATION => true,
+ // CURLOPT_USERAGENT => "identi.ca",
+ CURLOPT_CONNECTTIMEOUT => 120,
+ CURLOPT_TIMEOUT => 120
+ );
+
+
+ $ch = curl_init($uri);
+ curl_setopt_array($ch, $options);
+ $data = curl_exec($ch);
+ $errmsg = curl_error($ch);
+
+ if ($errmsg) {
+ common_debug("Twitter bridge - cURL error: $errmsg - trying to load: $uri with user $twit_user.",
+ __FILE__);
+ }
+
+ curl_close($ch);
+
+ return $data;
+}
+
+function twitter_user_info($screen_name, $password) {
+
+ $uri = "http://twitter.com/users/show/$screen_name.json";
+ $data = get_twitter_data($uri, $screen_name, $password);
+
+ if (!$data) {
+ return false;
+ }
+
+ $twit_user = json_decode($data);
+
+ if (!$twit_user) {
+ return false;
+ }
+
+ return $twit_user;
+}
+
+function update_twitter_user($fuser, $twitter_id, $screen_name) {
+
+ $original = clone($fuser);
+ $fuser->nickname = $screen_name;
+ $fuser->uri = 'http://twitter.com/' . $screen_name;
+ $result = $fuser->updateKeys($original);
+
+ if (!$result) {
+ common_log_db_error($fuser, 'UPDATE', __FILE__);
+ return false;
+ }
+
+ return true;
+}
+
+function add_twitter_user($twitter_id, $screen_name) {
+
+ // Otherwise, create a new Twitter user
+ $fuser = DB_DataObject::factory('foreign_user');
+
+ $fuser->nickname = $screen_name;
+ $fuser->uri = 'http://twitter.com/' . $screen_name;
+ $fuser->id = $twitter_id;
+ $fuser->service = 1; // Twitter
+ $fuser->created = common_sql_now();
+ $result = $fuser->insert();
+
+ if (!$result) {
+ common_debug("Twitter bridge - failed to add new Twitter user: $twitter_id - $screen_name.");
+ common_log_db_error($fuser, 'INSERT', __FILE__);
+ return false;
+ }
+
+ common_debug("Twitter bridge - Added new Twitter user: $screen_name ($twitter_id).");
+
+ return true;
+}
+
+// Creates or Updates a Twitter user
+function save_twitter_user($twitter_id, $screen_name) {
+
+ // Check to see whether the Twitter user is already in the system,
+ // and update its screen name and uri if so.
+ $fuser = Foreign_user::getForeignUser($twitter_id, 1);
+
+ if ($fuser) {
+
+ // Only update if Twitter screen name has changed
+ if ($fuser->nickname != $screen_name) {
+
+ common_debug('Twitter bridge - Updated nickname (and URI) for Twitter user ' .
+ "$fuser->id to $screen_name, was $fuser->nickname");
+
+ return update_twitter_user($fuser, $twitter_id, $screen_name);
+ }
+
+ } else {
+ return add_twitter_user($twitter_id, $screen_name);
+ }
+
+ return true;
+}
+
+function retreive_twitter_friends($twitter_id, $screen_name, $password) {
+
+ $uri = "http://twitter.com/statuses/friends/$twitter_id.json?page=";
+ $twitter_user = twitter_user_info($screen_name, $password);
+
+ // Calculate how many pages to get...
+ $pages = ceil($twitter_user->friends_count / 100);
+
+ if ($pages == 0) {
+ common_debug("Twitter bridge - Twitter user $screen_name has no friends! Lame.");
+ }
+
+ $friends = array();
+
+ for ($i = 1; $i <= $pages; $i++) {
+
+ $data = get_twitter_data($uri . $i, $screen_name, $password);
+
+ if (!$data) {
+ return NULL;
+ }
+
+ $more_friends = json_decode($data);
+
+ if (!$more_friends) {
+ return NULL;
+ }
+
+ $friends = array_merge($friends, $more_friends);
+ }
+
+ return $friends;
+}
+
+function save_twitter_friends($user, $twitter_id, $screen_name, $password) {
+
+ $friends = retreive_twitter_friends($twitter_id, $screen_name, $password);
+
+ if (is_null($friends)) {
+ common_debug("Twitter bridge - Couldn't get friends data from Twitter.");
+ return false;
+ }
+
+ foreach ($friends as $friend) {
+
+ $friend_name = $friend->screen_name;
+ $friend_id = $friend->id;
+
+ // Update or create the Foreign_user record
+ if (!save_twitter_user($friend_id, $friend_name)) {
+ return false;
+ }
+
+ // Check to see if there's a related local user
+ $flink = Foreign_link::getByForeignID($friend_id, 1);
+
+ if ($flink) {
+
+ // Get associated user and subscribe her
+ $friend_user = User::staticGet('id', $flink->user_id);
+ subs_subscribe_to($user, $friend_user);
+ common_debug("Twitter bridge - subscribed $friend_user->nickname to $user->nickname.");
+ }
+ }
+
+ return true;
+}
+