public function isEnabled(Context $context)
{
$all = all([$this->first->isEnabled($context), $this->second->isEnabled($context)]);
return pipe($all, function ($res) {
return (bool) ($res[0] ^ $res[1]);
});
}
private function send(string $message, callable $transform = null)
{
$promisor = new Deferred();
$this->connection->send($message);
$this->promisors[] = $promisor;
return $transform ? pipe($promisor->promise(), $transform) : $promisor->promise();
}
public function send(string $payload)
{
return pipe($this->connect(), function () use($payload) {
$this->outputBuffer .= $payload;
$this->outputBufferLength += strlen($payload);
if ($this->writeWatcher !== null) {
enable($this->writeWatcher);
}
});
}
private function getResourceUri(string $resource) : Promise
{
if (substr($resource, 0, 8) === "https://") {
return new Success($resource);
}
if (!$this->dictionary) {
return pipe(resolve($this->fetchDictionary()), function () use($resource) {
return $this->getResourceUri($resource);
});
}
if (isset($this->dictionary[$resource])) {
return new Success($this->dictionary[$resource]);
}
return new Failure(new AcmeException("Unknown resource: " . $resource));
}
public function update(string $key, int $user, int $change) : Promise
{
$promisor = new Deferred();
$this->redis->hIncrBy($key, $user, $change)->when(function ($error, $result) use($key, $user, $promisor) {
if ($error) {
$promisor->fail($error);
} else {
if ($result) {
$promisor->succeed($result);
} else {
$promisor->succeed(pipe($this->redis->hDel($key, $user), function () use($result) {
return $result;
}));
}
}
});
return $promisor->promise();
}
public function get(int $id)
{
return pipe($this->mysql->prepare("SELECT `token` FROM `auth_token` WHERE `user_id` = ?", [$id]), function (ResultSet $stmt) {
return $stmt->fetchObject();
});
}
/**
* Tries to acquire a lock.
*
* If acquiring a lock fails, it uses a blocking connection waiting for the current
* client holding the lock to free it. If the other client crashes or doesn't free the lock, the returned
* promise will fail, because once having entered the blocking mode, it doesn't try to aquire a lock until
* another client frees the current lock. It can't react to key expires. You can call this method once again
* if you absolutely need it, but usually, it should only be required if another client misbehaves or crashes,
* which is clearly a bug then.
*
* @param string $id specific lock ID (every lock has its own ID).
* @param string $token unique token (only has to be unique within other locking attempts with the same lock ID).
* @return Promise promise fails if lock couldn't be acquired, otherwise resolves to true.
*/
public function lock($id, $token) : Promise
{
return pipe($this->std->eval(self::LOCK, ["lock:{$id}", "queue:{$id}"], [$token, $this->ttl]), function ($result) use($id, $token) {
if ($result) {
return true;
} else {
return pipe($this->std->expire("queue:{$id}", $this->timeout * 2, true), function () use($id, $token) {
$connection = $this->getReadyConnection();
$promise = $connection->brPoplPush("queue:{$id}", "lock:{$id}", $this->timeout);
$promise->when(function () use($connection) {
$hash = spl_object_hash($connection);
$key = $this->busyConnectionMap[$hash] ?? null;
unset($this->busyConnections[$key]);
unset($this->busyConnectionMap[$hash]);
$this->readyConnections[] = [time(), $connection];
});
return pipe($promise, function ($result) use($id, $token) {
if ($result === null) {
return new Failure(new LockException());
}
return $this->std->eval(self::TOKEN, ["lock:{$id}"], [$token, $this->ttl]);
});
});
}
});
}
public function get(int $id) : Promise
{
return pipe($this->mysql->prepare("SELECT room_id, token FROM hook WHERE hook_id = ?", [$id]), function (ResultSet $stmt) {
return $stmt->fetchObject();
});
}
/**
* Destroys the session
* @return \Amp\Promise resolving after success
*/
public function destroy() : Promise
{
if ($this->state !== self::LOCKED) {
if ($this->state === self::PENDING) {
throw new LockException("Session is not yet locked, wait until the Promise returned by Session::open() is resolved");
} else {
throw new LockException("Session is not locked, can't write");
}
}
$this->data = [];
$this->state = self::UNLOCKED;
if ($this->id) {
$promise = $this->driver->save($this->id, [], $this->ttl == -1 ? $this->maxlife : $this->ttl + 1);
$this->setId(false);
return pipe($promise, function () {
return $this;
});
} else {
return new Success($this);
}
}
/**
* @param string[] $args
* @param callable $transform
* @return Promise
*/
protected function send(array $args, callable $transform = null)
{
$promisor = new Deferred();
$this->connection->send($args);
$this->promisors[] = $promisor;
return $transform ? pipe($promisor->promise(), $transform) : $promisor->promise();
}
/**
* @param array $strings
* @return Promise
*/
public function send(array $strings)
{
foreach ($strings as $string) {
if (!is_scalar($string)) {
throw new \InvalidArgumentException("All elements must be of type string or scalar and convertible to a string.");
}
}
return pipe($this->connect(), function () use($strings) {
$payload = "";
foreach ($strings as $string) {
$payload .= "\$" . strlen($string) . "\r\n{$string}\r\n";
}
$payload = "*" . count($strings) . "\r\n{$payload}";
$this->outputBuffer .= $payload;
$this->outputBufferLength += strlen($payload);
if ($this->writeWatcher !== null) {
enable($this->writeWatcher);
}
});
}
