From 32f81b3c0e7be3da35d5813e5409fa3b65dc220e Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@controlyourself.ca>
Date: Sat, 24 Jan 2009 18:38:12 +0100
Subject: [PATCH] Initial support for ping service

It makes sense to use the weblogs.com ping service to alert people to
changes on the site. So, we do. Includes an extra ping queue handler.
---
 lib/common.php               |  2 +
 lib/ping.php                 | 79 ++++++++++++++++++++++++++++++++++++
 lib/util.php                 |  2 +-
 scripts/pingqueuehandler.php | 64 +++++++++++++++++++++++++++++
 4 files changed, 146 insertions(+), 1 deletion(-)
 create mode 100644 lib/ping.php
 create mode 100644 scripts/pingqueuehandler.php

diff --git a/lib/common.php b/lib/common.php
index a2f9b9bfe7..cc82f8bd73 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -128,6 +128,8 @@ $config =
         array('enabled' => false,
               'server' => 'localhost',
               'port' => 11211),
+ 		'ping' =>
+        array('notify' => array()),
         'inboxes' =>
         array('enabled' => true), # on by default for new sites
         );
diff --git a/lib/ping.php b/lib/ping.php
new file mode 100644
index 0000000000..32c0b9806a
--- /dev/null
+++ b/lib/ping.php
@@ -0,0 +1,79 @@
+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+if (!defined('LACONICA')) { exit(1); }
+
+function ping_broadcast_notice($notice) {
+	if (!$notice->is_local) {
+		return;
+	}
+	
+	# Array of servers, URL => type
+	$notify = common_config('ping', 'notify');
+	$profile = $notice->getProfile();
+	$tags = ping_notice_tags($notice);
+	
+	foreach ($notify as $notify_url => $type) {
+		switch ($type) {
+		 case 'xmlrpc':
+		 case 'extended':
+			$req = xmlrpc_encode_request('weblogUpdates.ping',
+										 array($profile->nickname, # site name
+											   common_local_url('showstream', 
+																array('nickname' => $profile->nickname)),
+											   common_local_url('shownotice',
+																array('notice' => $notice->id)),
+											   common_local_url('userrss', 
+																array('nickname' => $profile->nickname)),
+											   $tags));
+			
+			# We re-use this tool's fetcher, since it's pretty good
+	
+			$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
+
+			if (!$fetcher) {
+				common_log(LOG_WARNING, 'Failed to initialize Yadis fetcher.', __FILE__);
+				return false;
+			}
+	
+			$result = $fetcher->post($notify_url,
+									 $req);
+											   
+		 case 'get':
+		 case 'post':			
+		 default:
+			common_log(LOG_WARNING, 'Unknown notify type for ' . $notify_url . ': ' . $type);
+										   }
+	}
+}
+		
+function ping_notice_tags($notice) {
+	$tag = new Notice_tag();
+	$tag->notice_id = $notice->id;
+	$tags = array();
+	if ($tag->find()) {
+		while ($tag->fetch()) {
+			$tags[] = $tag->tag;
+		}
+		$tag->free();
+		unset($tag);
+		return implode('|', $tags);
+	}
+	return NULL;
+}
\ No newline at end of file
diff --git a/lib/util.php b/lib/util.php
index b5b194519e..419e21e828 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -1124,7 +1124,7 @@ function common_twitter_broadcast($notice, $flink)
 
 function common_enqueue_notice($notice)
 {
-    foreach (array('jabber', 'omb', 'sms', 'public') as $transport) {
+    foreach (array('jabber', 'omb', 'sms', 'public', 'ping') as $transport) {
         $qi = new Queue_item();
         $qi->notice_id = $notice->id;
         $qi->transport = $transport;
diff --git a/scripts/pingqueuehandler.php b/scripts/pingqueuehandler.php
new file mode 100644
index 0000000000..55a266e4a4
--- /dev/null
+++ b/scripts/pingqueuehandler.php
@@ -0,0 +1,64 @@
+#!/usr/bin/env php
+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+# Abort if called from a web server
+if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
+	print "This script must be run from the command line\n";
+	exit();
+}
+
+define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
+define('LACONICA', true);
+
+require_once(INSTALLDIR . '/lib/common.php');
+require_once(INSTALLDIR . '/lib/ping.php');
+require_once(INSTALLDIR . '/lib/queuehandler.php');
+
+set_error_handler('common_error_handler');
+
+class PingQueueHandler extends QueueHandler {
+	
+	function transport() {
+		return 'ping';
+	}
+
+	function start() {
+		$this->log(LOG_INFO, "INITIALIZE");
+		return true;
+	}
+
+	function handle_notice($notice) {
+		return ping_broadcast_notice($notice);
+	}
+	
+	function finish() {
+	}
+}
+
+ini_set("max_execution_time", "0");
+ini_set("max_input_time", "0");
+set_time_limit(0);
+mb_internal_encoding('UTF-8');
+
+$id = ($argc > 1) ? $argv[1] : NULL;
+
+$handler = new PingQueueHandler($id);
+
+$handler->runOnce();