/**
* Encrypt a file (and thumbnail if given), upload the blob and send it to the given threemaId
*
* @param string $threemaId
* @param string $filePath
* @param null|string $thumbnailPath
* @throws \Threema\Core\Exception
* @return \Threema\MsgApi\Commands\Results\SendE2EResult
*/
public final function sendFileMessage($threemaId, $filePath, $thumbnailPath = null)
{
//analyse the file
$fileAnalyzeResult = FileAnalysisTool::analyse($filePath);
if (null === $fileAnalyzeResult) {
throw new Exception('could not analyze the file');
}
//fetch the public key
$receiverPublicKey = $this->fetchPublicKeyAndCheckCapability($threemaId, function (CapabilityResult $capabilityResult) {
return true === $capabilityResult->canFile();
});
//encrypt the main file
$encryptionResult = $this->cryptTool->encryptFile(file_get_contents($filePath));
$uploadResult = $this->connection->uploadFile($encryptionResult->getData());
if ($uploadResult === null || !$uploadResult->isSuccess()) {
throw new Exception('could not upload the file (' . $uploadResult->getErrorCode() . ' ' . $uploadResult->getErrorMessage() . ') ' . $uploadResult->getRawResponse());
}
$thumbnailUploadResult = null;
//encrypt the thumbnail file (if exists)
if (strlen($thumbnailPath) > 0 && true === file_exists($thumbnailPath)) {
//encrypt the main file
$thumbnailEncryptionResult = $this->cryptTool->encryptFileThumbnail(file_get_contents($thumbnailPath), $encryptionResult->getKey());
$thumbnailUploadResult = $this->connection->uploadFile($thumbnailEncryptionResult->getData());
if ($thumbnailUploadResult === null || !$thumbnailUploadResult->isSuccess()) {
throw new Exception('could not upload the thumbnail file (' . $thumbnailUploadResult->getErrorCode() . ' ' . $thumbnailUploadResult->getErrorMessage() . ') ' . $thumbnailUploadResult->getRawResponse());
}
}
$nonce = $this->cryptTool->randomNonce();
//create a file message box
$fileMessage = $this->cryptTool->encryptFileMessage($uploadResult, $encryptionResult, $thumbnailUploadResult, $fileAnalyzeResult, $this->privateKey, $receiverPublicKey, $nonce);
return $this->connection->sendE2E($threemaId, $nonce, $fileMessage);
}
