311 lines
8.5 KiB
C++
311 lines
8.5 KiB
C++
#ifndef SCSTWCLIENT_H
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#define SCSTWCLIENT_H
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#include <QObject>
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#include <QTcpSocket>
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#include <QDataStream>
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#include <QDateTime>
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#include <QTimer>
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#include <QEventLoop>
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#include <QSemaphore>
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#include <QThread>
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#include <QFuture>
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#include <QtConcurrent/QtConcurrent>
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#include <string.h>
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#include <QByteArray>
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#include <ScStw.hpp>
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/**
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* This class is used to connect and talk to the ScStw basestation.
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*
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* @brief The ScStwClient class
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* @author Dorian Zedler
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*/
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class ScStwClient : public QObject
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{
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Q_OBJECT
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public:
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/**
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* The constructor
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*
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* @brief ScStwClient
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*/
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explicit ScStwClient();
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enum State {DISCONNECTED, CONNECTING, INITIALISING, CONNECTED};
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private:
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// values for the socket connection
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QString ip;
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ushort port = 3563;
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int errors;
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const static int ERRORS_UNTIL_DISCONNECT = 4;
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QVariantList connections;
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//---general status values---//
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// some meta data of the base station
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QString firmwareVersion;
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double timeOffset;
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// the current state
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ScStwClient::State state;
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QDateTime *date;
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//to get the current time
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QTcpSocket *socket;
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//socket for communication with the extention
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QTimer *timeoutTimer;
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QString readBuffer;
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int nextConnectionId;
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struct waitingRequest {
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int id;
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QEventLoop * loop;
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QJsonObject reply;
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};
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QList<waitingRequest> waitingRequests;
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signals:
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/**
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* @brief Is emitted, when the connection state changes
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*/
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void stateChanged();
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/**
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* @brief Is emitted, whenever a reply is recieved which does not match any requests
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*
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* @param reply contains the reply
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*/
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void gotUnexpectedMessage(QString message);
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/**
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* @brief Is emitted, when an update signal from the basestation is recieved
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*
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* @param data
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*/
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void gotSignal(ScStw::SignalKey key, QVariant data);
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/**
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* @brief Is emitted, when there is any network error
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* @param error
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*/
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void gotError(QAbstractSocket::SocketError error);
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public slots:
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/**
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* @brief Function to connect to the base station
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*/
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void connectToHost();
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/**
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* @brief Function to disconnect from the basestation
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*/
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void closeConnection();
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/** socket communication handling */
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/**
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* @brief Funtion to send a command to the server (for internal use)
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* @param header the command to send
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* @param data the data to send
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* @param timeout the timeout
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* @param useTerminationKeys wether to use the termination keys defined in
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*
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* @return a variant map containing the Keys "status" and "data"
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*/
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QVariantMap sendCommand(int header, QJsonValue data = "", int timeout = 3000);
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/** updater functions */
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/**
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* @brief Function to set the timestamp of the base station to match the client
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* @see getTimeOffset()
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* @return true or false
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*/
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bool updateTime();
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/**
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* @brief Function to update the firmware of the basestation to the version stored in the client
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* @details will not do anything if the remote firmware is newer or the same as the clients one
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* @see isFirmwareUpToDate()
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* @see getFirmwareVersion()
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* @return true: firmware was updated or is already up-to-date; false: there was an error during the update
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*/
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bool updateFirmware();
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/**
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* @brief Function to check wether the firmware of the base station is up-to-date
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* @see getFirmwareVersion()
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* @see updateFirmware()
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* @return true or false
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*/
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bool isFirmwareUpToDate();
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/** helper functions */
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/**
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* @brief Function to write a setting on the base station
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* @param key the key to write to
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* @param value the value to write to
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* @return the status code returned by the command
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*/
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ScStw::ErrorCode writeRemoteSetting(ScStw::BaseStationSetting key, QString value);
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/**
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* @brief Function to read a setting on the base station
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* @param key the key to read from
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* @return the value of the key or "false" if the key is not found or an error occured
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*/
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QString readRemoteSetting(ScStw::BaseStationSetting key);
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/** Getter fuctions */
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/**
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* @brief Function to get the ip the client will try to connect to.
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* @see setIP()
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* @return the ip
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*/
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QString getIP();
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/**
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* @brief Function to get the current state of the client
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* @return the current state
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*/
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ScStwClient::State getState();
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/**
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* @brief Functio to get the extensions and their state from the base station
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* @return a list with all configured extensions and their state
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*/
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QVariantList getConnections();
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/**
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* @brief Function to get the time offset of the base station relative to the clients time
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* @see updateTime()
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* @return the time offset in milliseconds
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*/
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int getTimeOffset();
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/**
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* @brief Function to get the current firmware version of the base station
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* @see updateFirmware()
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* @see isFirmwareUpToDate()
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* @return Firmware version as string encoded as <major>.<minor>.<patch>
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*/
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QString getFirmwareVersion();
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/** setter functions */
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/**
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* @brief Function to set the ip to connect to
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* @see getIP()
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* @param ipAdress
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*/
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void setIP(QString ipAdress);
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private slots:
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/**
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* @brief called when timeout timer times out
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*/
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void connectionTimeout();
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/**
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* @brief Function that is connected to the QAbstractSocket::error slot and used to handle upcoming errors
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* @param err the error that occurred
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*/
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void handleError(QAbstractSocket::SocketError err);
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/**
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* @brief Function to init a session at the base station
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* @return true or false
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*/
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bool init();
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/**
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* @brief Function to end a session on the base station
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*/
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void deInit();
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/**
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* @brief Funtion to send a command to the server (for internal use)
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* @param header the command to send
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* @param data the data to send
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* @param timeout the timeout
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* @param useTerminationKeys wether to use the termination keys defined in
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* ScStw::SOCKET_MESSAGE_START_KEY and ScStw::SOCKET_MESSAGE_END_KEY
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* @return a variant map containing the Keys "status" and "data"
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*/
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QVariantMap sendCommand(int header, QJsonValue data, int timeout, bool useTerminationKeys);
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/**
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* @brief Function connected to the QAbstractSocket::readyRead signal
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*/
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void handleReadyRead();
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/**
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* @brief Function to process an incoming string and parse the messages contained in it.
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* @param message the message sting to parse
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*/
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void processSocketMessage(QString message);
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/**
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* @brief Function that handles a parsed message
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* @details This fuction looks up the id of the incoming message and tries to find the according waiting request.
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* If it is unable to find an accordin request, the signal ScStwClient::gotUnexpectedMessage(QString message) is called.
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* If the recieved message is a signal, the ScStwClient::handleSignal() function is called.
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* @see gotUnexpectedMessage()
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* @see handleSignal()
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* @param reply the massage that needs to be handles
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*/
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void handleSocketMessage(QString reply);
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/**
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* @brief Function to handle a change of the state of the tcp socket
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* @details it is connected to the QAbstractSocket::stateChanged signal
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* @see stateChanged()
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* @param socketState
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*/
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void handleSocketStateChange(QAbstractSocket::SocketState socketState);
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/**
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* @brief Function to handle a signal from the base station.
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* @details Called by the ScStwClient::handleSocketMessage function
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* @see handleSocketMessage()
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* @param data
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*/
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void handleSignal(QVariantMap data);
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/** Helper Functions */
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/**
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* @brief Function used to set the local cache of the baseStation connections.
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* @details emits ScStwClient::gotSignal() with a ScStw::ExtensionsChanged signal.
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* @see gotSignal()
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* @param connections the list to set the chache to
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*/
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void setConnections(QVariantList connections);
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/**
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* @brief Function to set the local state.
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* @details emits ScStwClient::stateChanged() when the new state does not match the old one.
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* @see stateChanged()
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* @param newState the state to change to
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*/
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void setState(ScStwClient::State newState);
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};
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extern ScStwClient * pGlobalScStwClient;
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#endif // SCSTWCLIENT_H
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