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PhabricatorCampfireProtocolAdapter.php
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Created
Fri, Feb 28, 00:52

PhabricatorCampfireProtocolAdapter.php
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<?php
final class PhabricatorCampfireProtocolAdapter
extends PhabricatorBaseProtocolAdapter {
private $readBuffers;
private $authtoken;
private $server;
private $readHandles;
private $multiHandle;
private $active;
private $inRooms = array();
public function connect() {
$this->server = idx($this->config, 'server');
$this->authtoken = idx($this->config, 'authtoken');
$ssl = idx($this->config, 'ssl', false);
$rooms = idx($this->config, 'join');
// First, join the room
if (!$rooms) {
throw new Exception("Not configured to join any rooms!");
}
$this->readBuffers = array();
// Set up our long poll in a curl multi request so we can
// continue running while it executes in the background
$this->multiHandle = curl_multi_init();
$this->readHandles = array();
foreach ($rooms as $room_id) {
$this->joinRoom($room_id);
// Set up the curl stream for reading
$url = ($ssl) ? "https://" : "http://";
$url .= "streaming.campfirenow.com/room/{$room_id}/live.json";
$this->readHandle[$url] = curl_init();
curl_setopt($this->readHandle[$url], CURLOPT_URL, $url);
curl_setopt($this->readHandle[$url], CURLOPT_RETURNTRANSFER, true);
curl_setopt($this->readHandle[$url], CURLOPT_FOLLOWLOCATION, 1);
curl_setopt(
$this->readHandle[$url],
CURLOPT_USERPWD,
$this->authtoken.':x');
curl_setopt(
$this->readHandle[$url],
CURLOPT_HTTPHEADER,
array("Content-type: application/json"));
curl_setopt(
$this->readHandle[$url],
CURLOPT_WRITEFUNCTION,
array($this, 'read'));
curl_setopt($this->readHandle[$url], CURLOPT_BUFFERSIZE, 128);
curl_setopt($this->readHandle[$url], CURLOPT_TIMEOUT, 0);
curl_multi_add_handle($this->multiHandle, $this->readHandle[$url]);
// Initialize read buffer
$this->readBuffers[$url] = '';
}
$this->active = null;
$this->blockingMultiExec();
}
// This is our callback for the background curl multi-request.
// Puts the data read in on the readBuffer for processing.
private function read($ch, $data) {
$info = curl_getinfo($ch);
$length = strlen($data);
$this->readBuffers[$info['url']] .= $data;
return $length;
}
private function blockingMultiExec() {
do {
$status = curl_multi_exec($this->multiHandle, $this->active);
} while ($status == CURLM_CALL_MULTI_PERFORM);
// Check for errors
if ($status != CURLM_OK) {
throw new Exception(
"Phabricator Bot had a problem reading from campfire.");
}
}
public function getNextMessages($poll_frequency) {
$messages = array();
if (!$this->active) {
throw new Exception("Phabricator Bot stopped reading from campfire.");
}
// Prod our http request
curl_multi_select($this->multiHandle, $poll_frequency);
$this->blockingMultiExec();
// Process anything waiting on the read buffer
while ($m = $this->processReadBuffer()) {
$messages[] = $m;
}
return $messages;
}
private function processReadBuffer() {
foreach ($this->readBuffers as $url => &$buffer) {
$until = strpos($buffer, "}\r");
if ($until == false) {
continue;
}
$message = substr($buffer, 0, $until + 1);
$buffer = substr($buffer, $until + 2);
$m_obj = json_decode($message, true);
return id(new PhabricatorBotMessage())
->setCommand('MESSAGE')
->setSender($m_obj['user_id'])
->setTarget($m_obj['room_id'])
->setBody($m_obj['body']);
}
// If we're here, there's nothing to process
return false;
}
public function writeMessage(PhabricatorBotMessage $message) {
switch ($message->getCommand()) {
case 'MESSAGE':
$this->speak(
$message->getBody(),
$message->getTarget());
break;
case 'SOUND':
$this->speak(
$message->getBody(),
$message->getTarget(),
'SoundMessage');
break;
case 'PASTE':
$this->speak(
$message->getBody(),
$message->getTarget(),
'PasteMessage');
break;
}
}
private function joinRoom($room_id) {
$this->performPost("/room/{$room_id}/join.json");
$this->inRooms[$room_id] = true;
}
private function leaveRoom($room_id) {
$this->performPost("/room/{$room_id}/leave.json");
unset($this->inRooms[$room_id]);
}
private function speak($message, $room_id, $type='TextMessage') {
$this->performPost(
"/room/{$room_id}/speak.json",
array(
'message' => array(
'type' => $type,
'body' => $message)));
}
private function performPost($endpoint, $data = Null) {
$uri = new PhutilURI($this->server);
$uri->setPath($endpoint);
$payload = json_encode($data);
list($output) = id(new HTTPSFuture($uri))
->setMethod('POST')
->addHeader('Content-Type', 'application/json')
->addHeader('Authorization', $this->getAuthorizationHeader())
->setData($payload)
->resolvex();
$output = trim($output);
if (strlen($output)) {
return json_decode($output, true);
}
return true;
}
public function __destruct() {
foreach ($this->inRooms as $room_id => $ignored) {
$this->leaveRoom($room_id);
}
if ($this->readHandles) {
foreach ($this->readHandles as $read_handle) {
curl_multi_remove_handle($this->multiHandle, $read_handle);
curl_close($read_handle);
}
}
curl_multi_close($this->multiHandle);
}
private function getAuthorizationHeader() {
return 'Basic '.base64_encode($this->authtoken.':x');
}
}

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