/**
* Returns the short user-friendly hash of the public key.
*
* This is the way the key is also displayed in the Threema app. For example
* there ECHOECHO is shown as `d30f795a904a213578baecc62c8611b5`. However the
* full public key of it is:
* `4a6a1b34dcef15d43cb74de2fd36091be99fbbaf126d099d47d83d919712c72b`
*
* @param $publicKey The public key to format.
*
* @return string 32 hex characters
*/
function KeyGetUserDisplay($publicKey)
{
//force key to be binary
if (ctype_alnum($publicKey)) {
$publicKey = KeyHexToBin($publicKey);
}
//create short hash
$shortHash = substr(hash('sha256', $publicKey), 0, 32);
return $shortHash;
}
/**
* Send a message to a Threema ID.
*
* @param Threema\MsgApi\Connection $connector connector
* @param string $threemaId The id where the message should be send to
* @param string $message The message to send (max 3500 characters)
*
* @throws Exception
* @return int
*/
function SendMessage(Threema\MsgApi\Connection $connector, $threemaId, $message)
{
$e2eHelper = new \Threema\MsgApi\Helpers\E2EHelper(KeyHexToBin(MSGAPI_PRIVATE_KEY), $connector);
$result = $e2eHelper->sendTextMessage($threemaId, $message);
if (true === $result->isSuccess()) {
return $result->getMessageId();
} else {
throw new Exception($result->getErrorMessage());
}
}
