hasherezade-bearparser/commander/Commander.h

#pragma once

#include <stdio.h>
#include <iostream>
#include <string>
#include <map>

#include "../parser/bearparser.h"

class Commander;

class CmdException : public CustomException
{
public:
    CmdException(const QString info) : CustomException(info) {}
};

class CmdParams
{
public:
    CmdParams() {}
    virtual ~CmdParams() {}
};

class CmdContext
{
public:
    CmdContext() : endProcessing(false) {}
    virtual ~CmdContext() {}
    void stopProcessing() { endProcessing = true; }
    bool isEndProcessing() { return endProcessing; }

protected:
    bool endProcessing;

friend class Commander;
};

class Command
{
public:
    Command(std::string v_desc = "") : desc(v_desc) {}
    virtual ~Command() {}

    virtual std::string getDescription() { return desc; }

    virtual void execute(CmdParams *params, CmdContext *context_ptr) = 0; // throws exceptions
    virtual CmdParams* fetchParams(std::string stream)// throws exception
    {
        return NULL; 
    } 

protected:
    std::string desc;
};

class QuitCommand : public Command
{
public:
    QuitCommand() : Command("Quit") {}

    virtual void execute(CmdParams *params, CmdContext *context_ptr) { if (context_ptr != NULL) context_ptr->stopProcessing(); }

};

class Commander
{
public:
    Commander(CmdContext *v_context);
    virtual ~Commander() { clearCommands(); }

    void printHelp();
    bool addCommand(std::string name, Command *cmd, bool overwrite = true);

    virtual void parseCommands(); // main loop

protected:
    Command* getCommand(std::string name);
    void clearCommands();

    std::map<std::string, Command*> cmds;
    CmdContext *context;
};