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client.cpp
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client.cpp
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#include "client.h"
#include "room.h"
#include "hall.h"
Client::Client(QObject *parent)
: QObject(parent), socket_(nullptr), room_(nullptr) {
connect(this, &Client::join, this, &Client::enterRoom, Qt::QueuedConnection);
connect(this, &Client::leave, this, &Client::leaveRoom, Qt::QueuedConnection);
}
Client::~Client() {
qDebug() << "Client destroyed";
}
void Client::enterRoom(Room *room) {
moveToThread(room->thread());
room_ = room;
if (room != nullptr) {
qDebug() << "Client" << socketDescriptor_ << "joined room" << room->name();
}
room->welcome(this);
}
void Client::leaveRoom(Room *room) {
room_ = nullptr;
moveToThread(Hall::Get()->thread());
QString msg("You left the room: ");
msg.append(room->name());
emit send(QStringList(msg));
if (room != nullptr) {
qDebug() << "Client" << socketDescriptor_ << "left room" << room->name();
}
}
void Client::establishConnection(qintptr socketDescriptor) {
TcpHandleCreator *creator = new TcpHandleCreator(socketDescriptor);
connect(creator, &TcpHandleCreator::socketReady, this, &Client::socketReady);
connect(creator, &TcpHandleCreator::socketFailed, this, &Client::connectionFailed);
creator->execute();
}
void Client::socketReady(TcpHandle *socket) {
socket_ = socket;
socketDescriptor_ = socket->socketDescriptor();
connect(socket_, &TcpHandle::receive, this, &Client::readyRead);
connect(socket_, &TcpHandle::disconnected, this, &Client::disconnectedFromClient);
qDebug() << "Client" << socketDescriptor_ << "connected";
buffer_.clear();
connect(this, &Client::send, &Client::transmit);
connect(this, &Client::registerProtocol, this, &Client::protocolRegistration, Qt::QueuedConnection);
connect(this, &Client::closeConnection, &Client::disconnectedFromServer);
emit connected();
}
#define ASSERT_SOCKET_VALID \
if (socket_ == nullptr) { \
qDebug() << "Invalid state in client" << socketDescriptor_ << __LINE__; \
return; \
}
void Client::disconnectedFromClient() {
qDebug() << "Client" << socketDescriptor_ << "disconnected";
socketDescriptor_ = -1;
if (room_ != nullptr) {
emit room_->leave(this);
}
emit Hall::Get()->leave(this);
ASSERT_SOCKET_VALID
socket_->deleteLater();
socket_ = nullptr;
}
void Client::disconnectedFromServer() {
ASSERT_SOCKET_VALID
socket_->shutdown();
}
inline void TrimRight(QString &str) {
while (str.size() > 0 && str.at(str.size() - 1).isSpace()) {
str.chop(1);
}
}
void Client::readyRead(QByteArray data) {
buffer_.append(data);
int from = 0, to = -1;
while (from < buffer_.size() &&
(to = buffer_.indexOf('\n', from)) > -1) {
pendingMessages_.emplace_back(buffer_.mid(from, to - from));
TrimRight(pendingMessages_.back());
from = to + 1;
}
buffer_ = buffer_.right(buffer_.size() - from);
processPendingMessages();
}
void Client::processPendingMessages() {
while (!pendingMessages_.empty()) {
const QString &msg = pendingMessages_.front();
if (!protocols_.empty()) {
QStringList response;
if (protocols_.top()->execute(msg, &response)) {
protocols_.pop();
}
if (!response.isEmpty()) transmit(response);
} else {
qDebug() << "ignore message" << msg;
}
pendingMessages_.pop_front();
}
}
void Client::transmit(QStringList msg) {
ASSERT_SOCKET_VALID
for (int i = 0; i < msg.size(); ++i) {
emit socket_->send(msg.at(i));
}
}
void Client::protocolRegistration(Protocol *protocol) {
ASSERT_SOCKET_VALID
protocols_.emplace(protocol);
if (protocol->intro() != nullptr) {
emit socket_->send(*protocol->intro());
}
}