<?php
/**
 * Name: Twitter Connector
 * Description: Relay public postings to a connected Twitter account
 * Version: 1.0.4
 * Author: Tobias Diekershoff <https://f.diekershoff.de/profile/tobias>
 * Author: Michael Vogel <https://pirati.ca/profile/heluecht>
 *
 * Copyright (c) 2011-2013 Tobias Diekershoff, Michael Vogel
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 *    * copyright notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the distribution.
 *    * Neither the name of the <organization> nor the names of its contributors
 *      may be used to endorse or promote products derived from this software
 *      without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
 
/*   Twitter Plugin for Friendica
 *
 *   Author: Tobias Diekershoff
 *           tobias.diekershoff@gmx.net
 *
 *   License:3-clause BSD license
 *
 *   Configuration:
 *     To use this plugin you need a OAuth Consumer key pair (key & secret)
 *     you can get it from Twitter at https://twitter.com/apps
 *
 *     Register your Friendica site as "Client" application with "Read & Write" access
 *     we do not need "Twitter as login". When you've registered the app you get the
 *     OAuth Consumer key and secret pair for your application/site.
 *
 *     Add this key pair to your global .htconfig.php or use the admin panel.
 *
 *     $a->config['twitter']['consumerkey'] = 'your consumer_key here';
 *     $a->config['twitter']['consumersecret'] = 'your consumer_secret here';
 *
 *     To activate the plugin itself add it to the $a->config['system']['addon']
 *     setting. After this, your user can configure their Twitter account settings
 *     from "Settings -> Plugin Settings".
 *
 *     Requirements: PHP5, curl [Slinky library]
 */

define('TWITTER_DEFAULT_POLL_INTERVAL', 5); // given in minutes

function twitter_install() {
	//  we need some hooks, for the configuration and for sending tweets
	register_hook('connector_settings', 'addon/twitter/twitter.php', 'twitter_settings');
	register_hook('connector_settings_post', 'addon/twitter/twitter.php', 'twitter_settings_post');
	register_hook('post_local', 'addon/twitter/twitter.php', 'twitter_post_local');
	register_hook('notifier_normal', 'addon/twitter/twitter.php', 'twitter_post_hook');
	register_hook('jot_networks', 'addon/twitter/twitter.php', 'twitter_jot_nets');
	register_hook('cron', 'addon/twitter/twitter.php', 'twitter_cron');
	register_hook('queue_predeliver', 'addon/twitter/twitter.php', 'twitter_queue_hook');
	register_hook('follow', 'addon/twitter/twitter.php', 'twitter_follow');
	register_hook('expire', 'addon/twitter/twitter.php', 'twitter_expire');
	register_hook('prepare_body', 'addon/twitter/twitter.php', 'twitter_prepare_body');
	logger("installed twitter");
}


function twitter_uninstall() {
	unregister_hook('connector_settings', 'addon/twitter/twitter.php', 'twitter_settings');
	unregister_hook('connector_settings_post', 'addon/twitter/twitter.php', 'twitter_settings_post');
	unregister_hook('post_local', 'addon/twitter/twitter.php', 'twitter_post_local');
	unregister_hook('notifier_normal', 'addon/twitter/twitter.php', 'twitter_post_hook');
	unregister_hook('jot_networks', 'addon/twitter/twitter.php', 'twitter_jot_nets');
	unregister_hook('cron', 'addon/twitter/twitter.php', 'twitter_cron');
	unregister_hook('queue_predeliver', 'addon/twitter/twitter.php', 'twitter_queue_hook');
	unregister_hook('follow', 'addon/twitter/twitter.php', 'twitter_follow');
	unregister_hook('expire', 'addon/twitter/twitter.php', 'twitter_expire');
	unregister_hook('prepare_body', 'addon/twitter/twitter.php', 'twitter_prepare_body');

	// old setting - remove only
	unregister_hook('post_local_end', 'addon/twitter/twitter.php', 'twitter_post_hook');
	unregister_hook('plugin_settings', 'addon/twitter/twitter.php', 'twitter_settings');
	unregister_hook('plugin_settings_post', 'addon/twitter/twitter.php', 'twitter_settings_post');

}

function twitter_follow($a, &$contact) {

	logger("twitter_follow: Check if contact is twitter contact. ".$contact["url"], LOGGER_DEBUG);

	if (!strstr($contact["url"], "://twitter.com") AND !strstr($contact["url"], "@twitter.com"))
		return;

	// contact seems to be a twitter contact, so continue
	$nickname = preg_replace("=https?://twitter.com/(.*)=ism", "$1", $contact["url"]);
	$nickname = str_replace("@twitter.com", "", $nickname);

	$uid = $a->user["uid"];

	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');

	require_once("addon/twitter/codebird.php");

	$cb = \Codebird\Codebird::getInstance();
	$cb->setConsumerKey($ckey, $csecret);
	$cb->setToken($otoken, $osecret);

	$parameters = array();
	$parameters["screen_name"] = $nickname;

	$user = $cb->friendships_create($parameters);

	twitter_fetchuser($a, $uid, $nickname);

	$r = q("SELECT name,nick,url,addr,batch,notify,poll,request,confirm,poco,photo,priority,network,alias,pubkey
		FROM `contact` WHERE `uid` = %d AND `nick` = '%s'",
				intval($uid),
				dbesc($nickname));
	if (count($r))
		$contact["contact"] = $r[0];
}

function twitter_jot_nets(&$a,&$b) {
	if(! local_user())
		return;

	$tw_post = get_pconfig(local_user(),'twitter','post');
	if(intval($tw_post) == 1) {
		$tw_defpost = get_pconfig(local_user(),'twitter','post_by_default');
		$selected = ((intval($tw_defpost) == 1) ? ' checked="checked" ' : '');
		$b .= '<div class="profile-jot-net"><input type="checkbox" name="twitter_enable"' . $selected . ' value="1" /> ' 
			. t('Post to Twitter') . '</div>';
	}
}

function twitter_settings_post ($a,$post) {
	if(! local_user())
		return;
	// don't check twitter settings if twitter submit button is not clicked
	if (!x($_POST,'twitter-submit'))
		return;

	if (isset($_POST['twitter-disconnect'])) {
		/***
		 * if the twitter-disconnect checkbox is set, clear the OAuth key/secret pair
		 * from the user configuration
		 */
		del_pconfig(local_user(), 'twitter', 'consumerkey');
		del_pconfig(local_user(), 'twitter', 'consumersecret');
		del_pconfig(local_user(), 'twitter', 'oauthtoken');
		del_pconfig(local_user(), 'twitter', 'oauthsecret');
		del_pconfig(local_user(), 'twitter', 'post');
		del_pconfig(local_user(), 'twitter', 'post_by_default');
		del_pconfig(local_user(), 'twitter', 'lastid');
		del_pconfig(local_user(), 'twitter', 'mirror_posts');
		del_pconfig(local_user(), 'twitter', 'import');
		del_pconfig(local_user(), 'twitter', 'create_user');
		del_pconfig(local_user(), 'twitter', 'own_id');
	} else {
	if (isset($_POST['twitter-pin'])) {
		//  if the user supplied us with a PIN from Twitter, let the magic of OAuth happen
		logger('got a Twitter PIN');
		require_once('library/twitteroauth.php');
		$ckey    = get_config('twitter', 'consumerkey');
		$csecret = get_config('twitter', 'consumersecret');
		//  the token and secret for which the PIN was generated were hidden in the settings
		//  form as token and token2, we need a new connection to Twitter using these token
		//  and secret to request a Access Token with the PIN
		$connection = new TwitterOAuth($ckey, $csecret, $_POST['twitter-token'], $_POST['twitter-token2']);
		$token   = $connection->getAccessToken( $_POST['twitter-pin'] );
		//  ok, now that we have the Access Token, save them in the user config
		set_pconfig(local_user(),'twitter', 'oauthtoken',  $token['oauth_token']);
		set_pconfig(local_user(),'twitter', 'oauthsecret', $token['oauth_token_secret']);
		set_pconfig(local_user(),'twitter', 'post', 1);
		//  reload the Addon Settings page, if we don't do it see Bug #42
		goaway($a->get_baseurl().'/settings/connectors');
	} else {
		//  if no PIN is supplied in the POST variables, the user has changed the setting
		//  to post a tweet for every new __public__ posting to the wall
		set_pconfig(local_user(),'twitter','post',intval($_POST['twitter-enable']));
		set_pconfig(local_user(),'twitter','post_by_default',intval($_POST['twitter-default']));
		set_pconfig(local_user(), 'twitter', 'mirror_posts', intval($_POST['twitter-mirror']));
		set_pconfig(local_user(), 'twitter', 'import', intval($_POST['twitter-import']));
		set_pconfig(local_user(), 'twitter', 'create_user', intval($_POST['twitter-create_user']));

		if (!intval($_POST['twitter-mirror']))
			del_pconfig(local_user(),'twitter','lastid');

		info(t('Twitter settings updated.') . EOL);
	}}
}
function twitter_settings(&$a,&$s) {
	if(! local_user())
		return;
	$a->page['htmlhead'] .= '<link rel="stylesheet"  type="text/css" href="' . $a->get_baseurl() . '/addon/twitter/twitter.css' . '" media="all" />' . "\r\n";
	/***
	 * 1) Check that we have global consumer key & secret
	 * 2) If no OAuthtoken & stuff is present, generate button to get some
	 * 3) Checkbox for "Send public notices (140 chars only)
	 */
	$ckey    = get_config('twitter', 'consumerkey' );
	$csecret = get_config('twitter', 'consumersecret' );
	$otoken  = get_pconfig(local_user(), 'twitter', 'oauthtoken'  );
	$osecret = get_pconfig(local_user(), 'twitter', 'oauthsecret' );
	$enabled = get_pconfig(local_user(), 'twitter', 'post');
	$checked = (($enabled) ? ' checked="checked" ' : '');
	$defenabled = get_pconfig(local_user(),'twitter','post_by_default');
	$defchecked = (($defenabled) ? ' checked="checked" ' : '');
	$mirrorenabled = get_pconfig(local_user(),'twitter','mirror_posts');
	$mirrorchecked = (($mirrorenabled) ? ' checked="checked" ' : '');
	$importenabled = get_pconfig(local_user(),'twitter','import');
	$importchecked = (($importenabled) ? ' checked="checked" ' : '');
	$create_userenabled = get_pconfig(local_user(),'twitter','create_user');
	$create_userchecked = (($create_userenabled) ? ' checked="checked" ' : '');

	$css = (($enabled) ? '' : '-disabled');

	$s .= '<span id="settings_twitter_inflated" class="settings-block fakelink" style="display: block;" onclick="openClose(\'settings_twitter_expanded\'); openClose(\'settings_twitter_inflated\');">';
	$s .= '<img class="connector'.$css.'" src="images/twitter.png" /><h3 class="connector">'. t('Twitter Import/Export/Mirror').'</h3>';
	$s .= '</span>';
	$s .= '<div id="settings_twitter_expanded" class="settings-block" style="display: none;">';
	$s .= '<span class="fakelink" onclick="openClose(\'settings_twitter_expanded\'); openClose(\'settings_twitter_inflated\');">';
	$s .= '<img class="connector'.$css.'" src="images/twitter.png" /><h3 class="connector">'. t('Twitter Import/Export/Mirror').'</h3>';
	$s .= '</span>';

	if ( (!$ckey) && (!$csecret) ) {
		/***
		 * no global consumer keys
		 * display warning and skip personal config
		 */
		$s .= '<p>'. t('No consumer key pair for Twitter found. Please contact your site administrator.') .'</p>';
	} else {
		/***
		 * ok we have a consumer key pair now look into the OAuth stuff
		 */
		if ( (!$otoken) && (!$osecret) ) {
			/***
			 * the user has not yet connected the account to twitter...
			 * get a temporary OAuth key/secret pair and display a button with
			 * which the user can request a PIN to connect the account to a
			 * account at Twitter.
			 */
			require_once('library/twitteroauth.php');
			$connection = new TwitterOAuth($ckey, $csecret);
			$request_token = $connection->getRequestToken();
			$token = $request_token['oauth_token'];
			/***
			 *  make some nice form
			 */
			$s .= '<p>'. t('At this Friendica instance the Twitter plugin was enabled but you have not yet connected your account to your Twitter account. To do so click the button below to get a PIN from Twitter which you have to copy into the input box below and submit the form. Only your <strong>public</strong> posts will be posted to Twitter.') .'</p>';
			$s .= '<a href="'.$connection->getAuthorizeURL($token).'" target="_twitter"><img src="addon/twitter/lighter.png" alt="'.t('Log in with Twitter').'"></a>';
			$s .= '<div id="twitter-pin-wrapper">';
			$s .= '<label id="twitter-pin-label" for="twitter-pin">'. t('Copy the PIN from Twitter here') .'</label>';
			$s .= '<input id="twitter-pin" type="text" name="twitter-pin" />';
			$s .= '<input id="twitter-token" type="hidden" name="twitter-token" value="'.$token.'" />';
			$s .= '<input id="twitter-token2" type="hidden" name="twitter-token2" value="'.$request_token['oauth_token_secret'].'" />';
	    $s .= '</div><div class="clear"></div>';
	    $s .= '<div class="settings-submit-wrapper" ><input type="submit" name="twitter-submit" class="settings-submit" value="' . t('Save Settings') . '" /></div>';
		} else {
			/***
			 *  we have an OAuth key / secret pair for the user
			 *  so let's give a chance to disable the postings to Twitter
			 */
			require_once('library/twitteroauth.php');
			$connection = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);
			$details = $connection->get('account/verify_credentials');
			$s .= '<div id="twitter-info" ><img id="twitter-avatar" src="'.$details->profile_image_url.'" /><p id="twitter-info-block">'. t('Currently connected to: ') .'<a href="https://twitter.com/'.$details->screen_name.'" target="_twitter">'.$details->screen_name.'</a><br /><em>'.$details->description.'</em></p></div>';
			$s .= '<p>'. t('If enabled all your <strong>public</strong> postings can be posted to the associated Twitter account. You can choose to do so by default (here) or for every posting separately in the posting options when writing the entry.') .'</p>';
			if ($a->user['hidewall']) {
			    $s .= '<p>'. t('<strong>Note</strong>: Due your privacy settings (<em>Hide your profile details from unknown viewers?</em>) the link potentially included in public postings relayed to Twitter will lead the visitor to a blank page informing the visitor that the access to your profile has been restricted.') .'</p>';
			}
			$s .= '<div id="twitter-enable-wrapper">';
			$s .= '<label id="twitter-enable-label" for="twitter-checkbox">'. t('Allow posting to Twitter'). '</label>';
			$s .= '<input id="twitter-checkbox" type="checkbox" name="twitter-enable" value="1" ' . $checked . '/>';
			$s .= '<div class="clear"></div>';
			$s .= '<label id="twitter-default-label" for="twitter-default">'. t('Send public postings to Twitter by default') .'</label>';
			$s .= '<input id="twitter-default" type="checkbox" name="twitter-default" value="1" ' . $defchecked . '/>';
			$s .= '<div class="clear"></div>';

			$s .= '<label id="twitter-mirror-label" for="twitter-mirror">'.t('Mirror all posts from twitter that are no replies').'</label>';
			$s .= '<input id="twitter-mirror" type="checkbox" name="twitter-mirror" value="1" '. $mirrorchecked . '/>';
			$s .= '<div class="clear"></div>';
			$s .= '</div>';

			$s .= '<label id="twitter-import-label" for="twitter-import">'.t('Import the remote timeline').'</label>';
			$s .= '<input id="twitter-import" type="checkbox" name="twitter-import" value="1" '. $importchecked . '/>';
			$s .= '<div class="clear"></div>';

			$s .= '<label id="twitter-create_user-label" for="twitter-create_user">'.t('Automatically create contacts').'</label>';
			$s .= '<input id="twitter-create_user" type="checkbox" name="twitter-create_user" value="1" '. $create_userchecked . '/>';
			$s .= '<div class="clear"></div>';

			$s .= '<div id="twitter-disconnect-wrapper">';
			$s .= '<label id="twitter-disconnect-label" for="twitter-disconnect">'. t('Clear OAuth configuration') .'</label>';
			$s .= '<input id="twitter-disconnect" type="checkbox" name="twitter-disconnect" value="1" />';
			$s .= '</div><div class="clear"></div>';
			$s .= '<div class="settings-submit-wrapper" ><input type="submit" name="twitter-submit" class="settings-submit" value="' . t('Save Settings') . '" /></div>'; 
		}
	}
	$s .= '</div><div class="clear"></div>';
}


function twitter_post_local(&$a,&$b) {

	if($b['edit'])
		return;

	if((local_user()) && (local_user() == $b['uid']) && (! $b['private']) && (! $b['parent']) ) {

		$twitter_post = intval(get_pconfig(local_user(),'twitter','post'));
		$twitter_enable = (($twitter_post && x($_REQUEST,'twitter_enable')) ? intval($_REQUEST['twitter_enable']) : 0);

		// if API is used, default to the chosen settings
		if($_REQUEST['api_source'] && intval(get_pconfig(local_user(),'twitter','post_by_default')))
			$twitter_enable = 1;

	if(! $twitter_enable)
		return;

	if(strlen($b['postopts']))
		$b['postopts'] .= ',';
		$b['postopts'] .= 'twitter';
	}
}

function twitter_action($a, $uid, $pid, $action) {

	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');

	require_once("addon/twitter/codebird.php");

	$cb = \Codebird\Codebird::getInstance();
	$cb->setConsumerKey($ckey, $csecret);
	$cb->setToken($otoken, $osecret);

	$post = array('id' => $pid);

	logger("twitter_action '".$action."' ID: ".$pid." data: " . print_r($post, true), LOGGER_DATA);

	switch ($action) {
		case "delete":
			$result = $cb->statuses_destroy($post);
			break;
		case "like":
			$result = $cb->favorites_create($post);
			break;
		case "unlike":
			$result = $cb->favorites_destroy($post);
			break;
	}
	logger("twitter_action '".$action."' send, result: " . print_r($result, true), LOGGER_DEBUG);
}

function twitter_post_hook(&$a,&$b) {

	/**
	 * Post to Twitter
	 */

	require_once("include/network.php");

	if (!get_pconfig($b["uid"],'twitter','import')) {
		if($b['deleted'] || $b['private'] || ($b['created'] !== $b['edited']))
			return;
	}

	if($b['parent'] != $b['id']) {
		logger("twitter_post_hook: parameter ".print_r($b, true), LOGGER_DATA);

		// Looking if its a reply to a twitter post
		if ((substr($b["parent-uri"], 0, 9) != "twitter::") AND (substr($b["extid"], 0, 9) != "twitter::") AND (substr($b["thr-parent"], 0, 9) != "twitter::")) {
			logger("twitter_post_hook: no twitter post ".$b["parent"]);
			return;
		}

		$r = q("SELECT * FROM item WHERE item.uri = '%s' AND item.uid = %d LIMIT 1",
			dbesc($b["thr-parent"]),
			intval($b["uid"]));

		if(!count($r)) {
			logger("twitter_post_hook: no parent found ".$b["thr-parent"]);
			return;
		} else {
			$iscomment = true;
			$orig_post = $r[0];
		}


		$nicknameplain = preg_replace("=https?://twitter.com/(.*)=ism", "$1", $orig_post["author-link"]);
		$nickname = "@[url=".$orig_post["author-link"]."]".$nicknameplain."[/url]";
		$nicknameplain = "@".$nicknameplain;

		logger("twitter_post_hook: comparing ".$nickname." and ".$nicknameplain." with ".$b["body"], LOGGER_DEBUG);
		if ((strpos($b["body"], $nickname) === false) AND (strpos($b["body"], $nicknameplain) === false))
			$b["body"] = $nickname." ".$b["body"];

		logger("twitter_post_hook: parent found ".print_r($orig_post, true), LOGGER_DATA);
	} else {
		$iscomment = false;

		if($b['private'] OR !strstr($b['postopts'],'twitter'))
			return;
	}

	if (($b['verb'] == ACTIVITY_POST) AND $b['deleted'])
		twitter_action($a, $b["uid"], substr($orig_post["uri"], 9), "delete");

	if($b['verb'] == ACTIVITY_LIKE) {
		logger("twitter_post_hook: parameter 2 ".substr($b["thr-parent"], 9), LOGGER_DEBUG);
		if ($b['deleted'])
			twitter_action($a, $b["uid"], substr($b["thr-parent"], 9), "unlike");
		else
			twitter_action($a, $b["uid"], substr($b["thr-parent"], 9), "like");
		return;
	}

	if($b['deleted'] || ($b['created'] !== $b['edited']))
		return;

	// if post comes from twitter don't send it back
	if($b['extid'] == NETWORK_TWITTER)
		return;

	if($b['app'] == "Twitter")
		return;

	logger('twitter post invoked');


	load_pconfig($b['uid'], 'twitter');

	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($b['uid'], 'twitter', 'oauthtoken');
	$osecret = get_pconfig($b['uid'], 'twitter', 'oauthsecret');

	if($ckey && $csecret && $otoken && $osecret) {
		logger('twitter: we have customer key and oauth stuff, going to send.', LOGGER_DEBUG);

		// If it's a repeated message from twitter then do a native retweet and exit
		if (twitter_is_retweet($a, $b['uid'], $b['body']))
			return;

		require_once('library/twitteroauth.php');
		require_once('include/bbcode.php');
		$tweet = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);

		$max_char = 140;
		require_once("include/plaintext.php");
		$msgarr = plaintext($a, $b, $max_char, true, 8);
		$msg = $msgarr["text"];

		if (($msg == "") AND isset($msgarr["title"]))
			$msg = shortenmsg($msgarr["title"], $max_char - 50);

		$image = "";

		if (isset($msgarr["url"]))
			$msg .= "\n".$msgarr["url"];
		elseif (isset($msgarr["image"]) AND ($msgarr["type"] != "video"))
			$image = $msgarr["image"];

		// and now tweet it :-)
		if(strlen($msg) and ($image != "")) {
			$img_str = fetch_url($image);

			$tempfile = tempnam(get_temppath(), "cache");
			file_put_contents($tempfile, $img_str);

			// Twitter had changed something so that the old library doesn't work anymore
			// so we are using a new library for twitter
			// To-Do:
			// Switching completely to this library with all functions
			require_once("addon/twitter/codebird.php");

			$cb = \Codebird\Codebird::getInstance();
			$cb->setConsumerKey($ckey, $csecret);
			$cb->setToken($otoken, $osecret);

			$post = array('status' => $msg, 'media[]' => $tempfile);

			if ($iscomment)
				$post["in_reply_to_status_id"] = substr($orig_post["uri"], 9);

			$result = $cb->statuses_updateWithMedia($post);
			unlink($tempfile);

			logger('twitter_post_with_media send, result: ' . print_r($result, true), LOGGER_DEBUG);

			if ($result->source)
				set_config("twitter", "application_name", strip_tags($result->source));

			if ($result->errors OR $result->error) {
				logger('Send to Twitter failed: "' . print_r($result->errors, true) . '"');

				// Workaround: Remove the picture link so that the post can be reposted without it
				$msg .= " ".$image;
				$image = "";
			} elseif ($iscomment) {
				logger('twitter_post: Update extid '.$result->id_str." for post id ".$b['id']);
				q("UPDATE `item` SET `extid` = '%s', `body` = '%s' WHERE `id` = %d",
					dbesc("twitter::".$result->id_str),
					dbesc($result->text),
					intval($b['id'])
				);
			}
		}

		if(strlen($msg) and ($image == "")) {
			$url = 'statuses/update';
			$post = array('status' => $msg);

			if ($iscomment)
				$post["in_reply_to_status_id"] = substr($orig_post["uri"], 9);

			$result = $tweet->post($url, $post);
			logger('twitter_post send, result: ' . print_r($result, true), LOGGER_DEBUG);

			if ($result->source)
				set_config("twitter", "application_name", strip_tags($result->source));

			if ($result->errors) {
				logger('Send to Twitter failed: "' . print_r($result->errors, true) . '"');

				$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `self`", intval($b['uid']));
				if (count($r))
					$a->contact = $r[0]["id"];

				$s = serialize(array('url' => $url, 'item' => $b['id'], 'post' => $post));
				require_once('include/queue_fn.php');
				add_to_queue($a->contact,NETWORK_TWITTER,$s);
				notice(t('Twitter post failed. Queued for retry.').EOL);
			} elseif ($iscomment) {
				logger('twitter_post: Update extid '.$result->id_str." for post id ".$b['id']);
				q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d",
					dbesc("twitter::".$result->id_str),
					intval($b['id'])
				);
				//q("UPDATE `item` SET `extid` = '%s', `body` = '%s' WHERE `id` = %d",
				//	dbesc("twitter::".$result->id_str),
				//	dbesc($result->text),
				//	intval($b['id'])
				//);
			}
		}
	}
}

function twitter_plugin_admin_post(&$a){
	$consumerkey	=	((x($_POST,'consumerkey'))		? notags(trim($_POST['consumerkey']))	: '');
	$consumersecret	=	((x($_POST,'consumersecret'))	? notags(trim($_POST['consumersecret'])): '');
	$applicationname = ((x($_POST, 'applicationname')) ? notags(trim($_POST['applicationname'])):'');
	set_config('twitter','consumerkey',$consumerkey);
	set_config('twitter','consumersecret',$consumersecret);
	//set_config('twitter','application_name',$applicationname);
	info( t('Settings updated.'). EOL );
}
function twitter_plugin_admin(&$a, &$o){
	$t = get_markup_template( "admin.tpl", "addon/twitter/" );

	$o = replace_macros($t, array(
		'$submit' => t('Save Settings'),
								// name, label, value, help, [extra values]
		'$consumerkey' => array('consumerkey', t('Consumer key'),  get_config('twitter', 'consumerkey' ), ''),
		'$consumersecret' => array('consumersecret', t('Consumer secret'),  get_config('twitter', 'consumersecret' ), ''),
		//'$applicationname' => array('applicationname', t('Name of the Twitter Application'), get_config('twitter','application_name'),t('Set this to the exact name you gave the app on twitter.com/apps to avoid mirroring postings from ~friendica back to ~friendica'))
	));
}

function twitter_cron($a,$b) {
	$last = get_config('twitter','last_poll');

	$poll_interval = intval(get_config('twitter','poll_interval'));
	if(! $poll_interval)
		$poll_interval = TWITTER_DEFAULT_POLL_INTERVAL;

	if($last) {
		$next = $last + ($poll_interval * 60);
		if($next > time()) {
			logger('twitter: poll intervall not reached');
			return;
		}
	}
	logger('twitter: cron_start');

	$r = q("SELECT * FROM `pconfig` WHERE `cat` = 'twitter' AND `k` = 'mirror_posts' AND `v` = '1' ORDER BY RAND()");
	if(count($r)) {
		foreach($r as $rr) {
			logger('twitter: fetching for user '.$rr['uid']);
			twitter_fetchtimeline($a, $rr['uid']);
		}
	}

	$abandon_days = intval(get_config('system','account_abandon_days'));
	if ($abandon_days < 1)
		$abandon_days = 0;

	$abandon_limit = date("Y-m-d H:i:s", time() - $abandon_days * 86400);

	$r = q("SELECT * FROM `pconfig` WHERE `cat` = 'twitter' AND `k` = 'import' AND `v` = '1' ORDER BY RAND()");
	if(count($r)) {
		foreach($r as $rr) {
			if ($abandon_days != 0) {
				$user = q("SELECT `login_date` FROM `user` WHERE uid=%d AND `login_date` >= '%s'", $rr['uid'], $abandon_limit);
				if (!count($user)) {
					logger('abandoned account: timeline from user '.$rr['uid'].' will not be imported');
					continue;
				}
			}

			logger('twitter: importing timeline from user '.$rr['uid']);
			twitter_fetchhometimeline($a, $rr["uid"]);

/*
			// To-Do
			// check for new contacts once a day
			$last_contact_check = get_pconfig($rr['uid'],'pumpio','contact_check');
			if($last_contact_check)
				$next_contact_check = $last_contact_check + 86400;
			else
				$next_contact_check = 0;

			if($next_contact_check <= time()) {
				pumpio_getallusers($a, $rr["uid"]);
				set_pconfig($rr['uid'],'pumpio','contact_check',time());
			}
*/

		}
	}

	logger('twitter: cron_end');

	set_config('twitter','last_poll', time());
}

function twitter_expire($a,$b) {

	$days = get_config('twitter', 'expire');

	if ($days == 0)
		return;

	$r = q("DELETE FROM `item` WHERE `deleted` AND `network` = '%s'", dbesc(NETWORK_TWITTER));

	require_once("include/items.php");

	logger('twitter_expire: expire_start');

	$r = q("SELECT * FROM `pconfig` WHERE `cat` = 'twitter' AND `k` = 'import' AND `v` = '1' ORDER BY RAND()");
	if(count($r)) {
		foreach($r as $rr) {
			logger('twitter_expire: user '.$rr['uid']);
			item_expire($rr['uid'], $days, NETWORK_TWITTER, true);
		}
	}

	logger('twitter_expire: expire_end');
}

function twitter_prepare_body(&$a,&$b) {
	if ($b["item"]["network"] != NETWORK_TWITTER)
		return;

	if ($b["preview"]) {
		$max_char = 140;
		require_once("include/plaintext.php");
		$item = $b["item"];
		$item["plink"] = $a->get_baseurl()."/display/".$a->user["nickname"]."/".$item["parent"];

		$r = q("SELECT `author-link` FROM item WHERE item.uri = '%s' AND item.uid = %d LIMIT 1",
			dbesc($item["thr-parent"]),
			intval(local_user()));

		if(count($r)) {
			$orig_post = $r[0];

			$nicknameplain = preg_replace("=https?://twitter.com/(.*)=ism", "$1", $orig_post["author-link"]);
			$nickname = "@[url=".$orig_post["author-link"]."]".$nicknameplain."[/url]";
			$nicknameplain = "@".$nicknameplain;

			if ((strpos($item["body"], $nickname) === false) AND (strpos($item["body"], $nicknameplain) === false))
				$item["body"] = $nickname." ".$item["body"];
		}


		$msgarr = plaintext($a, $item, $max_char, true, 8);
		$msg = $msgarr["text"];

		if (isset($msgarr["url"]))
			$msg .= " ".$msgarr["url"];

		if (isset($msgarr["image"]))
			$msg .= " ".$msgarr["image"];

                $b['html'] = nl2br(htmlspecialchars($msg));
	}
}

function twitter_fetchtimeline($a, $uid) {
	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');
	$lastid  = get_pconfig($uid, 'twitter', 'lastid');

	$application_name  = get_config('twitter', 'application_name');

	if ($application_name == "")
		$application_name = $a->get_hostname();

	$has_picture = false;

	require_once('mod/item.php');
	require_once('include/items.php');
	require_once('mod/share.php');

	require_once('library/twitteroauth.php');
	$connection = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);

	$parameters = array("exclude_replies" => true, "trim_user" => false, "contributor_details" => true, "include_rts" => true);

	$first_time = ($lastid == "");

	if ($lastid <> "")
		$parameters["since_id"] = $lastid;

	$items = $connection->get('statuses/user_timeline', $parameters);

	if (!is_array($items))
		return;

	$posts = array_reverse($items);

	if (count($posts)) {
	    foreach ($posts as $post) {
		if ($post->id_str > $lastid)
			$lastid = $post->id_str;

		if ($first_time)
			continue;

		if (!stristr($post->source, $application_name)) {
			$_SESSION["authenticated"] = true;
			$_SESSION["uid"] = $uid;

			unset($_REQUEST);
			$_REQUEST["type"] = "wall";
			$_REQUEST["api_source"] = true;
			$_REQUEST["profile_uid"] = $uid;
			//$_REQUEST["source"] = "Twitter";
			$_REQUEST["source"] = $post->source;
			$_REQUEST["extid"] = NETWORK_TWITTER;

			//$_REQUEST["date"] = $post->created_at;

			$_REQUEST["title"] = "";

			if (is_object($post->retweeted_status)) {

				$_REQUEST['body'] = $post->retweeted_status->text;

				$picture = "";

				// media
				if (is_array($post->retweeted_status->entities->media)) {
					foreach($post->retweeted_status->entities->media AS $media) {
						switch($media->type) {
							case 'photo':
								//$_REQUEST['body'] = str_replace($media->url, "\n\n[img]".$media->media_url_https."[/img]\n", $_REQUEST['body']);
								//$has_picture = true;
								$_REQUEST['body'] = str_replace($media->url, "", $_REQUEST['body']);
								$picture = $media->media_url_https;
								break;
						}
					}
				}

				$converted = twitter_expand_entities($a, $_REQUEST['body'], $post->retweeted_status, true, $picture);
				$_REQUEST['body'] = $converted["body"];

				if (function_exists("share_header"))
					$_REQUEST['body'] = share_header($post->retweeted_status->user->name, "https://twitter.com/".$post->retweeted_status->user->screen_name,
									$post->retweeted_status->user->profile_image_url_https, "",
									datetime_convert('UTC','UTC',$post->retweeted_status->created_at),
									"https://twitter.com/".$post->retweeted_status->user->screen_name."/status/".$post->retweeted_status->id_str).
								$_REQUEST['body'];
				else
					$_REQUEST['body'] = "[share author='".$post->retweeted_status->user->name.
						"' profile='https://twitter.com/".$post->retweeted_status->user->screen_name.
						"' avatar='".$post->retweeted_status->user->profile_image_url_https.
						"' posted='".datetime_convert('UTC','UTC',$post->retweeted_status->created_at).
						"' link='https://twitter.com/".$post->retweeted_status->user->screen_name."/status/".$post->retweeted_status->id_str."']".
						$_REQUEST['body'];

				$_REQUEST['body'] .= "[/share]";
			} else {
				$_REQUEST["body"] = $post->text;

				$picture = "";

				if (is_array($post->entities->media)) {
					foreach($post->entities->media AS $media) {
						switch($media->type) {
							case 'photo':
								//$_REQUEST['body'] = str_replace($media->url, "\n\n[img]".$media->media_url_https."[/img]\n", $_REQUEST['body']);
								//$has_picture = true;
								$_REQUEST['body'] = str_replace($media->url, "", $_REQUEST['body']);
								$picture = $media->media_url_https;
								break;
						}
					}
				}

				$converted = twitter_expand_entities($a, $_REQUEST["body"], $post, true, $picture);
				$_REQUEST['body'] = $converted["body"];
			}

			if (is_string($post->place->name))
				$_REQUEST["location"] = $post->place->name;

			if (is_string($post->place->full_name))
				$_REQUEST["location"] = $post->place->full_name;

			if (is_array($post->geo->coordinates))
				$_REQUEST["coord"] = $post->geo->coordinates[0]." ".$post->geo->coordinates[1];

			if (is_array($post->coordinates->coordinates))
				$_REQUEST["coord"] = $post->coordinates->coordinates[1]." ".$post->coordinates->coordinates[0];

			//print_r($_REQUEST);
			logger('twitter: posting for user '.$uid);

//			require_once('mod/item.php');

			item_post($a);
		}
	    }
	}
	set_pconfig($uid, 'twitter', 'lastid', $lastid);
}

function twitter_queue_hook(&$a,&$b) {

	$qi = q("SELECT * FROM `queue` WHERE `network` = '%s'",
		dbesc(NETWORK_TWITTER)
		);
	if(! count($qi))
		return;

	require_once('include/queue_fn.php');

	foreach($qi as $x) {
		if($x['network'] !== NETWORK_TWITTER)
			continue;

		logger('twitter_queue: run');

		$r = q("SELECT `user`.* FROM `user` LEFT JOIN `contact` on `contact`.`uid` = `user`.`uid` 
			WHERE `contact`.`self` = 1 AND `contact`.`id` = %d LIMIT 1",
			intval($x['cid'])
		);
		if(! count($r))
			continue;

		$user = $r[0];

		$ckey    = get_config('twitter', 'consumerkey');
		$csecret = get_config('twitter', 'consumersecret');
		$otoken  = get_pconfig($user['uid'], 'twitter', 'oauthtoken');
		$osecret = get_pconfig($user['uid'], 'twitter', 'oauthsecret');

		$success = false;

		if ($ckey AND $csecret AND $otoken AND $osecret) {

			logger('twitter_queue: able to post');

			$z = unserialize($x['content']);

			require_once("addon/twitter/codebird.php");

			$cb = \Codebird\Codebird::getInstance();
			$cb->setConsumerKey($ckey, $csecret);
			$cb->setToken($otoken, $osecret);

			if ($z['url'] == "statuses/update")
				$result = $cb->statuses_update($z['post']);

			logger('twitter_queue: post result: ' . print_r($result, true), LOGGER_DEBUG);

			if ($result->errors)
				logger('twitter_queue: Send to Twitter failed: "' . print_r($result->errors, true) . '"');
			else {
				$success = true;
				remove_queue_item($x['id']);
			}
		} else
			logger("twitter_queue: Error getting tokens for user ".$user['uid']);

		if (!$success) {
			logger('twitter_queue: delayed');
			update_queue_time($x['id']);
		}
	}
}

function twitter_fetch_contact($uid, $contact, $create_user) {
	require_once("include/Photo.php");

	if ($contact->id_str == "")
		return(-1);

	$avatar = str_replace("_normal.", ".", $contact->profile_image_url_https);

	$info = get_photo_info($avatar);
	if (!$info)
		$avatar = $contact->profile_image_url_https;

	// Check if the unique contact is existing
	// To-Do: only update once a while
	$r = q("SELECT id FROM unique_contacts WHERE url='%s' LIMIT 1",
			dbesc(normalise_link("https://twitter.com/".$contact->screen_name)));

	if (count($r) == 0)
		q("INSERT INTO unique_contacts (url, name, nick, avatar) VALUES ('%s', '%s', '%s', '%s')",
			dbesc(normalise_link("https://twitter.com/".$contact->screen_name)),
			dbesc($contact->name),
			dbesc($contact->screen_name),
			dbesc($avatar));
	else
		q("UPDATE unique_contacts SET name = '%s', nick = '%s', avatar = '%s' WHERE url = '%s'",
			dbesc($contact->name),
			dbesc($contact->screen_name),
			dbesc($avatar),
			dbesc(normalise_link("https://twitter.com/".$contact->screen_name)));

	if (DB_UPDATE_VERSION >= "1177")
		q("UPDATE `unique_contacts` SET `location` = '%s', `about` = '%s' WHERE url = '%s'",
			dbesc($contact->location),
			dbesc($contact->description),
			dbesc(normalise_link("https://twitter.com/".$contact->screen_name)));

	$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `alias` = '%s' LIMIT 1",
		intval($uid), dbesc("twitter::".$contact->id_str));

	if(!count($r) AND !$create_user)
		return(0);

	if (count($r) AND ($r[0]["readonly"] OR $r[0]["blocked"])) {
		logger("twitter_fetch_contact: Contact '".$r[0]["nick"]."' is blocked or readonly.", LOGGER_DEBUG);
		return(-1);
	}

	if(!count($r)) {
		// create contact record
		q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `alias`, `notify`, `poll`,
					`name`, `nick`, `photo`, `network`, `rel`, `priority`,
					`writable`, `blocked`, `readonly`, `pending` )
					VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, 0, 0, 0) ",
			intval($uid),
			dbesc(datetime_convert()),
			dbesc("https://twitter.com/".$contact->screen_name),
			dbesc(normalise_link("https://twitter.com/".$contact->screen_name)),
			dbesc($contact->screen_name."@twitter.com"),
			dbesc("twitter::".$contact->id_str),
			dbesc(''),
			dbesc("twitter::".$contact->id_str),
			dbesc($contact->name),
			dbesc($contact->screen_name),
			dbesc($avatar),
			dbesc(NETWORK_TWITTER),
			intval(CONTACT_IS_FRIEND),
			intval(1),
			intval(1)
		);

		$r = q("SELECT * FROM `contact` WHERE `alias` = '%s' AND `uid` = %d LIMIT 1",
			dbesc("twitter::".$contact->id_str),
			intval($uid)
			);

		if(! count($r))
			return(false);

		$contact_id  = $r[0]['id'];

		$g = q("SELECT def_gid FROM user WHERE uid = %d LIMIT 1",
			intval($uid)
		);

		if($g && intval($g[0]['def_gid'])) {
			require_once('include/group.php');
			group_add_member($uid,'',$contact_id,$g[0]['def_gid']);
		}

		require_once("Photo.php");

		$photos = import_profile_photo($avatar,$uid,$contact_id);

		q("UPDATE `contact` SET `photo` = '%s',
					`thumb` = '%s',
					`micro` = '%s',
					`name-date` = '%s',
					`uri-date` = '%s',
					`avatar-date` = '%s'
				WHERE `id` = %d",
			dbesc($photos[0]),
			dbesc($photos[1]),
			dbesc($photos[2]),
			dbesc(datetime_convert()),
			dbesc(datetime_convert()),
			dbesc(datetime_convert()),
			intval($contact_id)
		);

		if (DB_UPDATE_VERSION >= "1177")
			q("UPDATE `contact` SET `location` = '%s',
						`about` = '%s'
					WHERE `id` = %d",
				dbesc($contact->location),
				dbesc($contact->description),
				intval($contact_id)
			);

	} else {
		// update profile photos once every two weeks as we have no notification of when they change.

		//$update_photo = (($r[0]['avatar-date'] < datetime_convert('','','now -2 days')) ? true : false);
		$update_photo = ($r[0]['avatar-date'] < datetime_convert('','','now -12 hours'));

		// check that we have all the photos, this has been known to fail on occasion

		if((! $r[0]['photo']) || (! $r[0]['thumb']) || (! $r[0]['micro']) || ($update_photo)) {

			logger("twitter_fetch_contact: Updating contact ".$contact->screen_name, LOGGER_DEBUG);

			require_once("Photo.php");

			$photos = import_profile_photo($avatar, $uid, $r[0]['id']);

			q("UPDATE `contact` SET `photo` = '%s',
						`thumb` = '%s',
						`micro` = '%s',
						`name-date` = '%s',
						`uri-date` = '%s',
						`avatar-date` = '%s',
						`url` = '%s',
						`nurl` = '%s',
						`addr` = '%s',
						`name` = '%s',
						`nick` = '%s'
					WHERE `id` = %d",
				dbesc($photos[0]),
				dbesc($photos[1]),
				dbesc($photos[2]),
				dbesc(datetime_convert()),
				dbesc(datetime_convert()),
				dbesc(datetime_convert()),
				dbesc("https://twitter.com/".$contact->screen_name),
				dbesc(normalise_link("https://twitter.com/".$contact->screen_name)),
				dbesc($contact->screen_name."@twitter.com"),
				dbesc($contact->name),
				dbesc($contact->screen_name),
				intval($r[0]['id'])
			);

			if (DB_UPDATE_VERSION >= "1177")
				q("UPDATE `contact` SET `location` = '%s',
							`about` = '%s'
						WHERE `id` = %d",
					dbesc($contact->location),
					dbesc($contact->description),
					intval($r[0]['id'])
				);
		}
	}

	return($r[0]["id"]);
}

function twitter_fetchuser($a, $uid, $screen_name = "", $user_id = "") {
	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');

	require_once("addon/twitter/codebird.php");

	$cb = \Codebird\Codebird::getInstance();
	$cb->setConsumerKey($ckey, $csecret);
	$cb->setToken($otoken, $osecret);

	$r = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
		intval($uid));

	if(count($r)) {
		$self = $r[0];
	} else
		return;

	$parameters = array();

	if ($screen_name != "")
		$parameters["screen_name"] = $screen_name;

	if ($user_id != "")
		$parameters["user_id"] = $user_id;

	// Fetching user data
	$user = $cb->users_show($parameters);

	if (!is_object($user))
		return;

	$contact_id = twitter_fetch_contact($uid, $user, true);

	return $contact_id;
}

function twitter_expand_entities($a, $body, $item, $no_tags = false, $picture) {
	require_once("include/oembed.php");
	require_once("include/network.php");

	$tags = "";

	if (isset($item->entities->urls)) {
		$type = "";
		$footerurl = "";
		$footerlink = "";
		$footer = "";

		foreach ($item->entities->urls AS $url) {
			if ($url->url AND $url->expanded_url AND $url->display_url) {

				$expanded_url = original_url($url->expanded_url);

				$oembed_data = oembed_fetch_url($expanded_url);

				// Quickfix: Workaround for URL with "[" and "]" in it
				if (strpos($expanded_url, "[") OR strpos($expanded_url, "]"))
					$expanded_url = $url->url;

				if ($type == "")
					$type = $oembed_data->type;

				if ($oembed_data->type == "video") {
					//$body = str_replace($url->url,
					//		"[video]".$expanded_url."[/video]", $body);
					//$dontincludemedia = true;
					$type = $oembed_data->type;
					$footerurl = $expanded_url;
					$footerlink = "[url=".$expanded_url."]".$expanded_url."[/url]";

					$body = str_replace($url->url, $footerlink, $body);
				//} elseif (($oembed_data->type == "photo") AND isset($oembed_data->url) AND !$dontincludemedia) {
				} elseif (($oembed_data->type == "photo") AND isset($oembed_data->url)) {
					$body = str_replace($url->url,
							"[url=".$expanded_url."][img]".$oembed_data->url."[/img][/url]",
							$body);
					//$dontincludemedia = true;
				} elseif ($oembed_data->type != "link")
					$body = str_replace($url->url,
							"[url=".$expanded_url."]".$expanded_url."[/url]",
							$body);
				else {
					$img_str = fetch_url($expanded_url, true, $redirects, 4);

					$tempfile = tempnam(get_temppath(), "cache");
					file_put_contents($tempfile, $img_str);
					$mime = image_type_to_mime_type(exif_imagetype($tempfile));
					unlink($tempfile);

					if (substr($mime, 0, 6) == "image/") {
						$type = "photo";
						$body = str_replace($url->url, "[img]".$expanded_url."[/img]", $body);
						//$dontincludemedia = true;
					} else {
						$type = $oembed_data->type;
						$footerurl = $expanded_url;
						$footerlink = "[url=".$expanded_url."]".$expanded_url."[/url]";

						$body = str_replace($url->url, $footerlink, $body);
					}
				}
			}
		}

		if ($footerurl != "")
			$footer = add_page_info($footerurl, false, $picture);

		if (($footerlink != "") AND (trim($footer) != "")) {
			$removedlink = trim(str_replace($footerlink, "", $body));

			if (($removedlink == "") OR strstr($body, $removedlink))
				$body = $removedlink;

			$body .= $footer;
		}

		if (($footer == "") AND ($picture != ""))
			$body .= "\n\n[img]".$picture."[/img]\n";

		if ($no_tags)
			return(array("body" => $body, "tags" => ""));

		$tags_arr = array();

		foreach ($item->entities->hashtags AS $hashtag) {
			$url = "#[url=".$a->get_baseurl()."/search?tag=".rawurlencode($hashtag->text)."]".$hashtag->text."[/url]";
			$tags_arr["#".$hashtag->text] = $url;
			$body = str_replace("#".$hashtag->text, $url, $body);
		}

		foreach ($item->entities->user_mentions AS $mention) {
			$url = "@[url=https://twitter.com/".rawurlencode($mention->screen_name)."]".$mention->screen_name."[/url]";
			$tags_arr["@".$mention->screen_name] = $url;
			$body = str_replace("@".$mention->screen_name, $url, $body);
		}

		// it seems as if the entities aren't always covering all mentions. So the rest will be checked here
		$tags = get_tags($body);

		if(count($tags)) {
			foreach($tags as $tag) {
				if (strstr(trim($tag), " "))
					continue;

				if(strpos($tag,'#') === 0) {
					if(strpos($tag,'[url='))
						continue;

					// don't link tags that are already embedded in links

					if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
						continue;
					if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
						continue;

					$basetag = str_replace('_',' ',substr($tag,1));
					$url = '#[url='.$a->get_baseurl().'/search?tag='.rawurlencode($basetag).']'.$basetag.'[/url]';
					$body = str_replace($tag,$url,$body);
					$tags_arr["#".$basetag] = $url;
					continue;
				} elseif(strpos($tag,'@') === 0) {
					if(strpos($tag,'[url='))
						continue;

					$basetag = substr($tag,1);
					$url = '@[url=https://twitter.com/'.rawurlencode($basetag).']'.$basetag.'[/url]';
					$body = str_replace($tag,$url,$body);
					$tags_arr["@".$basetag] = $url;
				}
			}
		}


		$tags = implode($tags_arr, ",");

	}
	return(array("body" => $body, "tags" => $tags));
}

function twitter_createpost($a, $uid, $post, $self, $create_user, $only_existing_contact) {

	$has_picture = false;

	$postarray = array();
	$postarray['network'] = NETWORK_TWITTER;
	$postarray['gravity'] = 0;
	$postarray['uid'] = $uid;
	$postarray['wall'] = 0;
	$postarray['uri'] = "twitter::".$post->id_str;

	$r = q("SELECT * FROM `item` WHERE `extid` = '%s' AND `uid` = %d LIMIT 1",
			dbesc($postarray['uri']),
			intval($uid)
		);

	if (count($r))
		return(array());

	$contactid = 0;

	if ($post->in_reply_to_status_id_str != "") {

		$parent = "twitter::".$post->in_reply_to_status_id_str;

		$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
				dbesc($parent),
				intval($uid)
			);
		if (count($r)) {
			$postarray['thr-parent'] = $r[0]["uri"];
			$postarray['parent-uri'] = $r[0]["parent-uri"];
			$postarray['parent'] = $r[0]["parent"];
			$postarray['object-type'] = ACTIVITY_OBJ_COMMENT;
		} else {
			$r = q("SELECT * FROM `item` WHERE `extid` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($parent),
					intval($uid)
				);
			if (count($r)) {
				$postarray['thr-parent'] = $r[0]['uri'];
				$postarray['parent-uri'] = $r[0]['parent-uri'];
				$postarray['parent'] = $r[0]['parent'];
				$postarray['object-type'] = ACTIVITY_OBJ_COMMENT;
			} else {
				$postarray['thr-parent'] = $postarray['uri'];
				$postarray['parent-uri'] = $postarray['uri'];
				$postarray['object-type'] = ACTIVITY_OBJ_NOTE;
			}
		}

		// Is it me?
		$own_id = get_pconfig($uid, 'twitter', 'own_id');

		if ($post->user->id_str == $own_id) {
			$r = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
				intval($uid));

			if(count($r)) {
				$contactid = $r[0]["id"];

				$postarray['owner-name'] =  $r[0]["name"];
				$postarray['owner-link'] = $r[0]["url"];
				$postarray['owner-avatar'] =  $r[0]["photo"];
			} else
				return(array());
		}
		// Don't create accounts of people who just comment something
		$create_user = false;
	} else {
		$postarray['parent-uri'] = $postarray['uri'];
		$postarray['object-type'] = ACTIVITY_OBJ_NOTE;
	}

	if ($contactid == 0) {
		$contactid = twitter_fetch_contact($uid, $post->user, $create_user);

		$postarray['owner-name'] = $post->user->name;
		$postarray['owner-link'] = "https://twitter.com/".$post->user->screen_name;
		$postarray['owner-avatar'] = $post->user->profile_image_url_https;
	}

	if(($contactid == 0) AND !$only_existing_contact)
		$contactid = $self['id'];
	elseif ($contactid <= 0)
		return(array());

	$postarray['contact-id'] = $contactid;

	$postarray['verb'] = ACTIVITY_POST;
	$postarray['author-name'] = $postarray['owner-name'];
	$postarray['author-link'] = $postarray['owner-link'];
	$postarray['author-avatar'] = $postarray['owner-avatar'];
	$postarray['plink'] = "https://twitter.com/".$post->user->screen_name."/status/".$post->id_str;
	$postarray['app'] = strip_tags($post->source);

	if ($post->user->protected) {
		$postarray['private'] = 1;
		$postarray['allow_cid'] = '<' . $self['id'] . '>';
	}

	$postarray['body'] = $post->text;

	$picture = "";

	// media
	if (is_array($post->entities->media)) {
		foreach($post->entities->media AS $media) {
			switch($media->type) {
				case 'photo':
					//$postarray['body'] = str_replace($media->url, "\n\n[img]".$media->media_url_https."[/img]\n", $postarray['body']);
					//$has_picture = true;
					$postarray['body'] = str_replace($media->url, "", $postarray['body']);
					$postarray['object-type'] = ACTIVITY_OBJ_IMAGE;
					$picture = $media->media_url_https;
					break;
				default:
					$postarray['body'] .= print_r($media, true);
			}
		}
	}

	$converted = twitter_expand_entities($a, $postarray['body'], $post, false, $picture);
	$postarray['body'] = $converted["body"];
	$postarray['tag'] = $converted["tags"];

	$postarray['created'] = datetime_convert('UTC','UTC',$post->created_at);
	$postarray['edited'] = datetime_convert('UTC','UTC',$post->created_at);

	if (is_string($post->place->name))
		$postarray["location"] = $post->place->name;

	if (is_string($post->place->full_name))
		$postarray["location"] = $post->place->full_name;

	if (is_array($post->geo->coordinates))
		$postarray["coord"] = $post->geo->coordinates[0]." ".$post->geo->coordinates[1];

	if (is_array($post->coordinates->coordinates))
		$postarray["coord"] = $post->coordinates->coordinates[1]." ".$post->coordinates->coordinates[0];

	if (is_object($post->retweeted_status)) {

		$postarray['body'] = $post->retweeted_status->text;

		$picture = "";

		// media
		if (is_array($post->retweeted_status->entities->media)) {
			foreach($post->retweeted_status->entities->media AS $media) {
				switch($media->type) {
					case 'photo':
						//$postarray['body'] = str_replace($media->url, "\n\n[img]".$media->media_url_https."[/img]\n", $postarray['body']);
						//$has_picture = true;
						$postarray['body'] = str_replace($media->url, "", $postarray['body']);
						$postarray['object-type'] = ACTIVITY_OBJ_IMAGE;
						$picture = $media->media_url_https;
						break;
					default:
						$postarray['body'] .= print_r($media, true);
				}
			}
		}

		$converted = twitter_expand_entities($a, $postarray['body'], $post->retweeted_status, false, $picture);
		$postarray['body'] = $converted["body"];
		$postarray['tag'] = $converted["tags"];

		twitter_fetch_contact($uid, $post->retweeted_status->user, false);

		// Deactivated at the moment, since there are problems with answers to retweets
		if (false AND !intval(get_config('system','wall-to-wall_share'))) {
			$postarray['body'] = "[share author='".$post->retweeted_status->user->name.
				"' profile='https://twitter.com/".$post->retweeted_status->user->screen_name.
				"' avatar='".$post->retweeted_status->user->profile_image_url_https.
				"' posted='".datetime_convert('UTC','UTC',$post->retweeted_status->created_at).
				"' link='https://twitter.com/".$post->retweeted_status->user->screen_name."/status/".$post->retweeted_status->id_str."']".
				$postarray['body'];
			$postarray['body'] .= "[/share]";
		} else {
			// Let retweets look like wall-to-wall posts
			$postarray['author-name'] = $post->retweeted_status->user->name;
			$postarray['author-link'] = "https://twitter.com/".$post->retweeted_status->user->screen_name;
			$postarray['author-avatar'] = $post->retweeted_status->user->profile_image_url_https;
			//if (($post->retweeted_status->user->screen_name != "") AND ($post->retweeted_status->id_str != "")) {
			//	$postarray['plink'] = "https://twitter.com/".$post->retweeted_status->user->screen_name."/status/".$post->retweeted_status->id_str;
			//	$postarray['uri'] = "twitter::".$post->retweeted_status->id_str;
			//}
		}

	}
	return($postarray);
}

function twitter_checknotification($a, $uid, $own_id, $top_item, $postarray) {

	// this whole function doesn't seem to work. Needs complete check

	$user = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` LIMIT 1",
			intval($uid)
		);

	if(!count($user))
		return;

	// Is it me?
	if (link_compare($user[0]["url"], $postarray['author-link']))
		return;

	$own_user = q("SELECT * FROM `contact` WHERE `uid` = %d AND `alias` = '%s' LIMIT 1",
			intval($uid),
			dbesc("twitter::".$own_id)
		);

	if(!count($own_user))
		return;

	// Is it me from twitter?
	if (link_compare($own_user[0]["url"], $postarray['author-link']))
		return;

	$myconv = q("SELECT `author-link`, `author-avatar`, `parent` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 AND `deleted` = 0",
			dbesc($postarray['parent-uri']),
			intval($uid)
			);

	if(count($myconv)) {

		foreach($myconv as $conv) {
			// now if we find a match, it means we're in this conversation

			if(!link_compare($conv['author-link'],$user[0]["url"]) AND !link_compare($conv['author-link'],$own_user[0]["url"]))
				continue;

			require_once('include/enotify.php');

			$conv_parent = $conv['parent'];

			notification(array(
				'type'         => NOTIFY_COMMENT,
				'notify_flags' => $user[0]['notify-flags'],
				'language'     => $user[0]['language'],
				'to_name'      => $user[0]['username'],
				'to_email'     => $user[0]['email'],
				'uid'          => $user[0]['uid'],
				'item'         => $postarray,
				'link'         => $a->get_baseurl().'/display/'.urlencode(get_item_guid($top_item)),
				'source_name'  => $postarray['author-name'],
				'source_link'  => $postarray['author-link'],
				'source_photo' => $postarray['author-avatar'],
				'verb'         => ACTIVITY_POST,
				'otype'        => 'item',
				'parent'       => $conv_parent,
			));

			// only send one notification
			break;
		}
	}
}

function twitter_fetchparentposts($a, $uid, $post, $connection, $self, $own_id) {
	logger("twitter_fetchparentposts: Fetching for user ".$uid." and post ".$post->id_str, LOGGER_DEBUG);

	$posts = array();

	while ($post->in_reply_to_status_id_str != "") {
		$parameters = array("trim_user" => false, "id" => $post->in_reply_to_status_id_str);

		$post = $connection->get('statuses/show', $parameters);

		if (!count($post)) {
			logger("twitter_fetchparentposts: Can't fetch post ".$parameters->id, LOGGER_DEBUG);
			break;
		}

		$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
				dbesc("twitter::".$post->id_str),
				intval($uid)
			);

		if (count($r))
			break;
		
		$posts[] = $post;
	}

	logger("twitter_fetchparentposts: Fetching ".count($posts)." parents", LOGGER_DEBUG);

	$posts = array_reverse($posts);

	if (count($posts)) {
		foreach ($posts as $post) {
			$postarray = twitter_createpost($a, $uid, $post, $self, false, false);

			if (trim($postarray['body']) == "")
				continue;

			$item = item_store($postarray);
			$postarray["id"] = $item;

			logger('twitter_fetchparentpost: User '.$self["nick"].' posted parent timeline item '.$item);

			if ($item != 0)
				twitter_checknotification($a, $uid, $own_id, $item, $postarray);
		}
	}
}

function twitter_fetchhometimeline($a, $uid) {
	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');
	$create_user = get_pconfig($uid, 'twitter', 'create_user');
	$mirror_posts = get_pconfig($uid, 'twitter', 'mirror_posts');

	logger("twitter_fetchhometimeline: Fetching for user ".$uid, LOGGER_DEBUG);

	$application_name  = get_config('twitter', 'application_name');

	if ($application_name == "")
		$application_name = $a->get_hostname();

	require_once('library/twitteroauth.php');
	require_once('include/items.php');

	$connection = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);

	$own_contact = twitter_fetch_own_contact($a, $uid);

	$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
		intval($own_contact),
		intval($uid));

	if(count($r)) {
		$own_id = $r[0]["nick"];
	} else {
		logger("twitter_fetchhometimeline: Own twitter contact not found for user ".$uid, LOGGER_DEBUG);
		return;
	}

	$r = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
		intval($uid));

	if(count($r)) {
		$self = $r[0];
	} else {
		logger("twitter_fetchhometimeline: Own contact not found for user ".$uid, LOGGER_DEBUG);
		return;
	}

	$u = q("SELECT * FROM user WHERE uid = %d LIMIT 1",
		intval($uid));
	if(!count($u)) {
		logger("twitter_fetchhometimeline: Own user not found for user ".$uid, LOGGER_DEBUG);
		return;
	}

	$parameters = array("exclude_replies" => false, "trim_user" => false, "contributor_details" => true, "include_rts" => true);
	//$parameters["count"] = 200;


	// Fetching timeline
	$lastid  = get_pconfig($uid, 'twitter', 'lasthometimelineid');

	$first_time = ($lastid == "");

	if ($lastid <> "")
		$parameters["since_id"] = $lastid;

	$items = $connection->get('statuses/home_timeline', $parameters);

	if (!is_array($items)) {
		logger("twitter_fetchhometimeline: Error fetching home timeline: ".print_r($items, true), LOGGER_DEBUG);
		return;
	}

	$posts = array_reverse($items);

	logger("twitter_fetchhometimeline: Fetching timeline for user ".$uid." ".sizeof($posts)." items", LOGGER_DEBUG);

	if (count($posts)) {
		foreach ($posts as $post) {
			if ($post->id_str > $lastid)
				$lastid = $post->id_str;

			if ($first_time)
				continue;

			if (stristr($post->source, $application_name) && $post->user->screen_name == $own_id) {
				logger("twitter_fetchhometimeline: Skip previously sended post", LOGGER_DEBUG);
				continue;
			}

			if ($mirror_posts && $post->user->screen_name == $own_id && $post->in_reply_to_status_id_str == "") {
				logger("twitter_fetchhometimeline: Skip post that will be mirrored", LOGGER_DEBUG);
				continue;
			}

			if ($post->in_reply_to_status_id_str != "")
				twitter_fetchparentposts($a, $uid, $post, $connection, $self, $own_id);

			$postarray = twitter_createpost($a, $uid, $post, $self, $create_user, true);

			if (trim($postarray['body']) == "")
				continue;

			$item = item_store($postarray);
			$postarray["id"] = $item;

			logger('twitter_fetchhometimeline: User '.$self["nick"].' posted home timeline item '.$item);

			if ($item != 0)
				twitter_checknotification($a, $uid, $own_id, $item, $postarray);

		}
	}
	set_pconfig($uid, 'twitter', 'lasthometimelineid', $lastid);

	// Fetching mentions
	$lastid  = get_pconfig($uid, 'twitter', 'lastmentionid');

	$first_time = ($lastid == "");

	if ($lastid <> "")
		$parameters["since_id"] = $lastid;

	$items = $connection->get('statuses/mentions_timeline', $parameters);

	if (!is_array($items)) {
		logger("twitter_fetchhometimeline: Error fetching mentions: ".print_r($items, true), LOGGER_DEBUG);
		return;
	}

	$posts = array_reverse($items);

	logger("twitter_fetchhometimeline: Fetching mentions for user ".$uid." ".sizeof($posts)." items", LOGGER_DEBUG);

	if (count($posts)) {
		foreach ($posts as $post) {
			if ($post->id_str > $lastid)
				$lastid = $post->id_str;

			if ($first_time)
				continue;

			if ($post->in_reply_to_status_id_str != "")
				twitter_fetchparentposts($a, $uid, $post, $connection, $self, $own_id);

			$postarray = twitter_createpost($a, $uid, $post, $self, false, false);

			if (trim($postarray['body']) == "")
				continue;

			$item = item_store($postarray);
			$postarray["id"] = $item;

			if (!isset($postarray["parent"]) OR ($postarray["parent"] == 0))
				$postarray["parent"] = $item;

			logger('twitter_fetchhometimeline: User '.$self["nick"].' posted mention timeline item '.$item);

			if ($item == 0) {
				$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($postarray['uri']),
					intval($uid)
				);
				if (count($r)) {
					$item = $r[0]['id'];
					$parent_id = $r[0]['parent'];
				}
			} else
				$parent_id = $postarray['parent'];

			if ($item != 0) {
				require_once('include/enotify.php');
				notification(array(
					'type'         => NOTIFY_TAGSELF,
					'notify_flags' => $u[0]['notify-flags'],
					'language'     => $u[0]['language'],
					'to_name'      => $u[0]['username'],
					'to_email'     => $u[0]['email'],
					'uid'          => $u[0]['uid'],
					'item'         => $postarray,
					'link'         => $a->get_baseurl().'/display/'.urlencode(get_item_guid($item)),
					'source_name'  => $postarray['author-name'],
					'source_link'  => $postarray['author-link'],
					'source_photo' => $postarray['author-avatar'],
					'verb'         => ACTIVITY_TAG,
					'otype'        => 'item',
					'parent'       => $parent_id
				));
			}
		}
	}

	set_pconfig($uid, 'twitter', 'lastmentionid', $lastid);
}

function twitter_fetch_own_contact($a, $uid) {
	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');

	$own_id = get_pconfig($uid, 'twitter', 'own_id');

	$contact_id = 0;

	if ($own_id == "") {
		require_once('library/twitteroauth.php');

		$connection = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);

		// Fetching user data
		$user = $connection->get('account/verify_credentials');

		set_pconfig($uid, 'twitter', 'own_id', $user->id_str);

		$contact_id = twitter_fetch_contact($uid, $user, true);

	} else {
		$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `alias` = '%s' LIMIT 1",
			intval($uid), dbesc("twitter::".$own_id));
		if(count($r))
			$contact_id = $r[0]["id"];
		else
			del_pconfig($uid, 'twitter', 'own_id');

	}

	return($contact_id);
}

function twitter_is_retweet($a, $uid, $body) {
	$body = trim($body);

	// Skip if it isn't a pure repeated messages
	// Does it start with a share?
	if (strpos($body, "[share") > 0)
		return(false);

	// Does it end with a share?
	if (strlen($body) > (strrpos($body, "[/share]") + 8))
		return(false);

	$attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
	// Skip if there is no shared message in there
	if ($body == $attributes)
		return(false);

	$link = "";
	preg_match("/link='(.*?)'/ism", $attributes, $matches);
	if ($matches[1] != "")
		$link = $matches[1];

	preg_match('/link="(.*?)"/ism', $attributes, $matches);
	if ($matches[1] != "")
		$link = $matches[1];

	$id = preg_replace("=https?://twitter.com/(.*)/status/(.*)=ism", "$2", $link);
	if ($id == $link)
		return(false);

	logger('twitter_is_retweet: Retweeting id '.$id.' for user '.$uid, LOGGER_DEBUG);

	$ckey    = get_config('twitter', 'consumerkey');
	$csecret = get_config('twitter', 'consumersecret');
	$otoken  = get_pconfig($uid, 'twitter', 'oauthtoken');
	$osecret = get_pconfig($uid, 'twitter', 'oauthsecret');

	require_once('library/twitteroauth.php');
	$connection = new TwitterOAuth($ckey,$csecret,$otoken,$osecret);

	$result = $connection->post('statuses/retweet/'.$id);

	logger('twitter_is_retweet: result '.print_r($result, true), LOGGER_DEBUG);

	return(!isset($result->errors));
}
?>
