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#include "uploadmanager.h"
#include "unpacker.h"
#include "packer.h"
#include "stm32crc.h"
static const int CHUNK_SIZE = 2000;
using std::function;
UploadManager::UploadManager(WatchConnector *watch, QObject *parent) :
QObject(parent), watch(watch), _lastUploadId(0), _state(StateNotStarted)
{
watch->setEndpointHandler(WatchConnector::watchPUTBYTES,
[this](const QByteArray &msg) {
if (_pending.empty()) {
logger()->warn() << "putbytes message, but queue is empty!";
return false;
}
handleMessage(msg);
return true;
});
}
uint UploadManager::upload(WatchConnector::UploadType type, int index, QIODevice *device, int size,
function<void()> successCallback, function<void(int)> errorCallback)
{
PendingUpload upload;
upload.id = ++_lastUploadId;
upload.type = type;
upload.index = index;
upload.device = device;
if (size < 0) {
upload.remaining = device->size();
} else {
upload.remaining = size;
}
upload.successCallback = successCallback;
upload.errorCallback = errorCallback;
if (upload.remaining <= 0) {
logger()->warn() << "upload is empty";
if (errorCallback) {
errorCallback(-1);
return -1;
}
}
_pending.enqueue(upload);
if (_pending.size() == 1) {
startNextUpload();
}
return upload.id;
}
void UploadManager::cancel(uint id, int code)
{
if (_pending.empty()) {
logger()->warn() << "cannot cancel, empty queue";
return;
}
if (id == _pending.head().id) {
PendingUpload upload = _pending.dequeue();
logger()->debug() << "aborting current upload" << id << "(code:" << code << ")";
if (_state != StateNotStarted && _state != StateWaitForToken && _state != StateComplete) {
QByteArray msg;
Packer p(&msg);
p.write<quint8>(WatchConnector::putbytesABORT);
p.write<quint32>(_token);
logger()->debug() << "sending abort for upload" << id;
watch->sendMessage(WatchConnector::watchPUTBYTES, msg);
}
_state = StateNotStarted;
_token = 0;
if (upload.errorCallback) {
upload.errorCallback(code);
}
if (!_pending.empty()) {
startNextUpload();
}
} else {
for (int i = 1; i < _pending.size(); ++i) {
if (_pending[i].id == id) {
logger()->debug() << "cancelling upload" << id << "(code:" << code << ")";
if (_pending[i].errorCallback) {
_pending[i].errorCallback(code);
}
_pending.removeAt(i);
return;
}
}
logger()->warn() << "cannot cancel, id" << id << "not found";
}
}
void UploadManager::startNextUpload()
{
Q_ASSERT(!_pending.empty());
Q_ASSERT(_state == StateNotStarted);
PendingUpload &upload = _pending.head();
QByteArray msg;
Packer p(&msg);
p.write<quint8>(WatchConnector::putbytesINIT);
p.write<quint32>(upload.remaining);
p.write<quint8>(upload.type);
p.write<quint8>(upload.index);
_state = StateWaitForToken;
watch->sendMessage(WatchConnector::watchPUTBYTES, msg);
}
void UploadManager::handleMessage(const QByteArray &msg)
{
Q_ASSERT(!_pending.empty());
PendingUpload &upload = _pending.head();
Unpacker u(msg);
int status = u.read<quint8>();
if (u.bad() || status != 1) {
logger()->warn() << "upload" << upload.id << "got error code=" << status;
cancel(upload.id, status);
return;
}
quint32 recv_token = u.read<quint32>();
if (u.bad()) {
logger()->warn() << "upload" << upload.id << ": could not read the token";
cancel(upload.id, -1);
return;
}
if (_state != StateNotStarted && _state != StateWaitForToken && _state != StateComplete) {
if (recv_token != _token) {
logger()->warn() << "upload" << upload.id << ": invalid token";
cancel(upload.id, -1);
return;
}
}
switch (_state) {
case StateNotStarted:
logger()->warn() << "got packet when upload is not started";
break;
case StateWaitForToken:
logger()->debug() << "token received";
_token = recv_token;
_state = StateInProgress;
/* fallthrough */
case StateInProgress:
logger()->debug() << "moving to the next chunk";
if (upload.remaining > 0) {
if (!uploadNextChunk(upload)) {
cancel(upload.id, -1);
return;
}
} else {
logger()->debug() << "no additional chunks, commit";
_state = StateCommit;
if (!commit(upload)) {
cancel(upload.id, -1);
return;
}
}
break;
case StateCommit:
logger()->debug() << "commited succesfully";
_state = StateComplete;
if (!complete(upload)) {
cancel(upload.id, -1);
return;
}
break;
case StateComplete:
logger()->debug() << "upload" << upload.id << "succesful, invoking callback";
if (upload.successCallback) {
upload.successCallback();
}
_pending.dequeue();
_token = 0;
_state = StateNotStarted;
if (!_pending.empty()) {
startNextUpload();
}
break;
default:
logger()->warn() << "received message in wrong state";
break;
}
}
bool UploadManager::uploadNextChunk(PendingUpload &upload)
{
QByteArray chunk = upload.device->read(qMin<int>(upload.remaining, CHUNK_SIZE));
if (upload.remaining < CHUNK_SIZE && chunk.size() < upload.remaining) {
// Short read!
logger()->warn() << "short read during upload" << upload.id;
return false;
}
Q_ASSERT(!chunk.isEmpty());
Q_ASSERT(_state = StateInProgress);
QByteArray msg;
Packer p(&msg);
p.write<quint8>(WatchConnector::putbytesSEND);
p.write<quint32>(_token);
p.write<quint32>(chunk.size());
msg.append(chunk);
logger()->debug() << "sending a chunk of" << chunk.size() << "bytes";
watch->sendMessage(WatchConnector::watchPUTBYTES, msg);
upload.remaining -= chunk.size();
upload.crc.addData(chunk);
logger()->debug() << "remaining" << upload.remaining << "bytes";
return true;
}
bool UploadManager::commit(PendingUpload &upload)
{
Q_ASSERT(_state == StateCommit);
Q_ASSERT(upload.remaining == 0);
QByteArray msg;
Packer p(&msg);
p.write<quint8>(WatchConnector::putbytesCOMMIT);
p.write<quint32>(_token);
p.write<quint32>(upload.crc.result());
logger()->debug() << "commiting upload" << upload.id
<< "with crc" << qPrintable(QString("0x%1").arg(upload.crc.result(), 0, 16));
watch->sendMessage(WatchConnector::watchPUTBYTES, msg);
return true;
}
bool UploadManager::complete(PendingUpload &upload)
{
Q_ASSERT(_state == StateComplete);
QByteArray msg;
Packer p(&msg);
p.write<quint8>(WatchConnector::putbytesCOMPLETE);
p.write<quint32>(_token);
logger()->debug() << "completing upload" << upload.id;
watch->sendMessage(WatchConnector::watchPUTBYTES, msg);
return true;
}
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