source: trunk/FACT++/src/RemoteControl.h@ 10329

#ifndef FACT_RemoteControl
#define FACT_RemoteControl

// **************************************************************************
/** @class StateClient

@brief A simple Dim client diriving from MessageDimRX subscribing to the STATE service

This is a simple dim client which subscribes to the MESSAGE and STATE
service of a server. It stores the last state and its time as well as
the last message sent.

**/
// **************************************************************************
#include "MessageDim.h"
#include "Time.h"

class StateClient : public MessageDimRX
{
private:
    Time fStateTime;           /// Combine into one MTime (together with value)
    int  fState;               /// -2 not initialized, -1 not connected, 0>= state of client

    std::string fStateMsg;     /// The message received with the last state change

    DimStampedInfo fInfoState; /// The dim service subscription

protected:
    void infoHandler();

public:
    StateClient(const std::string &name, MessageImp &imp);

    bool        IsConnected() const { return fState>=0; }
    int         GetState() const    { return fState;    }
    std::string GetMsg() const      { return fStateMsg; }
};

// **************************************************************************
/** @class RemoteControlImp

@brief This implements the basic functions of a remote control via dim

Through a ServiceList object this object subscribes to all available
SERVICE_LISTs  in the dim network. This allows to keep an up-to-date
list of all servers and services. Its ProcessCommand member function
allows to emit commands according to the services found in the network.
Its infoHandler() is called as an update notifier from the ClientList
object.

**/
// **************************************************************************
#include "ServiceList.h"
#include "DimErrorRedirecter.h"

using namespace std;

class RemoteControlImp : public MessageImp, public DimErrorRedirecter, public DimInfoHandler
{
private:
    std::ostream &lout;          /// Output stream for local synchrounous output

protected:
    typedef std::map<const std::string, StateClient*> ClientList;

    ServiceList fCommandList;    /// An up-to-date list of all available commands
    ServiceList fServiceList;    /// An up-to-date list of all available services
    ClientList  fClientList;     /// A list with all MESSAGE services to which we subscribed

    std::string fCurrentServer;  /// The server to which we currently cd'ed

    void infoHandler();

protected:
    // Redirect asynchronous output to the output window
    RemoteControlImp(std::ostream &out, std::ostream &in) :
        MessageImp(out),
        DimErrorRedirecter(static_cast<MessageImp&>(*this)),
        lout(in), fCommandList("CMD", out), fServiceList("", out)
    {
        fCommandList.SetHandler(this);
        fServiceList.SetHandler(this);
    }
    bool ProcessCommand(const std::string &str);
};

// **************************************************************************
/** @class RemoteControl

@brief Implements a remote control based on a Readline class for the dim network

This template implements all functions which overwrite any function from the
Readline class. Since several derivatives of the Readline class implement
different kind of Readline access, this class can be derived by any of them
due to its template argument. However, the normal case will be
deriving it from either Console or Shell.

@tparam T
   The base class for RemoteControl. Either Readlien or a class
    deriving from it. This is usually either Console or Shell.

**/
// **************************************************************************
#include "WindowLog.h"
#include "ReadlineColor.h"

template <class T>
class RemoteControl : public T, public RemoteControlImp
{
private:
    std::ostream &lout; /// Output stream for local synchrounous output

    // This funtion defines which generator should be called.
    // If it returns 0 the standard reaqdline generator are called.
    // Otherwise set the right generator with rl_completion_matches.
    char **Completion(const char *text, int start, int)
    {
        // Get the whole buffer before the tab-position
        const string s = string(T::GetBuffer(), 0, start);
        const string l = T::TrimSpaces(s.c_str());
        if (l.empty())
        {
            if (fCurrentServer.empty())
                return T::Complete(fCommandList.GetServerList(), text);
            else
                return T::Complete(fCommandList.GetServiceList(fCurrentServer), text);
        }
        return T::Complete(fCommandList.GetServiceList(l), text);
    }

    void infoHandler()
    {
        RemoteControlImp::infoHandler();
        if (!fCurrentServer.empty() && !fCommandList.HasServer(fCurrentServer))
        {
            fCurrentServer = "";
            T::UpdatePrompt();
        }
    }

public:
    // Redirect asynchronous output to the output window
    RemoteControl(const char *name) : T(name),
        RemoteControlImp(T::GetStreamOut(), T::GetStreamIn()),
        lout(T::GetStreamIn())
    {
    }


    bool PrintGeneralHelp()
    {
        T::PrintGeneralHelp();
        lout << " " << kUnderline << "Specific commands:" << endl;
        lout << kBold << "   s,servers    " << kReset << "List all servers which are connected." << endl;
        lout << kBold << "   svc,services " << kReset << "List all services in the network." << endl;
        lout << endl;
        return true;
    }

    bool PrintCommands()
    {
        lout << endl << kBold << "List of commands:" << endl;
        fCommandList.PrintDescription(lout);
        return true;
    }

    // returns whether a command should be put into the history
    bool Process(const std::string &str)
    {
        if (ReadlineColor::Process(lout, str))
            return true;

        if (T::Process(str))
            return true;

        if (str=="servers" || str=="s")
        {
            fCommandList.PrintServerList(lout);
            return true;
        }

        if (str=="services" || str=="svc")
        {
            fServiceList.PrintDescription(lout);
            return true;
        }

        return ProcessCommand(str);
    }
};



// **************************************************************************
/** @class RemoteConsole

@brief Derives the RemoteControl from Control and adds a proper prompt

This is basically a RemoteControl, which derives through the template
argument from the Console class. It enhances the functionality of
the remote control with a proper updated prompt.

 */
// **************************************************************************
#include "Console.h"

class RemoteConsole : public RemoteControl<Console>
{
public:
    RemoteConsole(const char *name, bool continous=false) :
        RemoteControl<Console>(name)
    {
        SetContinous(continous);
    }
    string GetUpdatePrompt() const;
};

// **************************************************************************
/** @class RemoteShell

@brief Derives the RemoteControl from Shell and adds colored prompt

This is basically a RemoteControl, which derives through the template
argument from the Shell class. It enhances the functionality of
the local control with a proper updated prompt.

 */
// **************************************************************************
#include "Shell.h"

class RemoteShell : public RemoteControl<Shell>
{
public:
    RemoteShell(const char *name, bool = false) :
        RemoteControl<Shell>(name)
    {
    }
    string GetUpdatePrompt() const;
};

#endif