source: orxonox.OLD/trunk/src/lib/shell/shell_command.cc @ 5166

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_

#include "shell_command.h"

#include "list.h"
#include "debug.h"
#include "class_list.h"

#include "key_names.h"
#include <stdarg.h>
#include <stdio.h>

using namespace std;

/**
 * constructs and registers a new Command
 * @param commandName the name of the Command
 * @param className the name of the class to apply this command to
 * @param paramCount the count of parameters this command takes
 * @return self
 */
ShellCommandBase::ShellCommandBase(const char* commandName, const char* className, unsigned int paramCount, ...)
{
  this->setClassID(CL_SHELL_COMMAND, "ShellCommand");
  this->setName(commandName);
  this->description = NULL;

//  this->classID = classID;
  this->className = className; //ClassList::IDToString(classID);

  // handling parameters, and storing them:
  if (paramCount > FUNCTOR_MAX_ARGUMENTS)
    paramCount = FUNCTOR_MAX_ARGUMENTS;
  this->paramCount = paramCount;
  this->parameters = new unsigned int[paramCount];

  va_list parameterList;
  va_start(parameterList, paramCount);

  for (unsigned int i = 0; i < paramCount; i++)
  {
    this->parameters[i] = va_arg(parameterList, int);

    switch (this->parameters[i])
    {
      case ParameterBool:
        this->defaultBools[i] = va_arg(parameterList, int);
        break;
      case ParameterChar:
        this->defaultStrings[i] = new char[2];
        sprintf(this->defaultStrings[0], "%c",  va_arg(parameterList, int));
        break;
      case ParameterString:
        this->defaultStrings[i] = va_arg(parameterList, char*);
        break;
      case ParameterInt:
        this->defaultInts[i] = va_arg(parameterList, int);
        break;
      case ParameterUInt:
        this->defaultInts[i] = va_arg(parameterList, unsigned int);
        break;
      case ParameterFloat:
        this->defaultFloats[i] = va_arg(parameterList, double);
        break;
      case ParameterLong:
        this->defaultInts[i] = va_arg(parameterList, long);
        break;
      default:
        break;
    }
  }

  // adding this ShellCommand to the list of known Commands
  ShellCommandBase::commandList->add(this);
}

/**
 * deconstructs a ShellCommand
 * @return
 */
ShellCommandBase::~ShellCommandBase()
{
  delete[] this->parameters;
}

/**
 * unregisters all Commands that exist
 */
void ShellCommandBase::unregisterAllCommands()
{
  tIterator<ShellCommandBase>* iterator = ShellCommandBase::commandList->getIterator();
  ShellCommandBase* elem = iterator->firstElement();
  while(elem != NULL)
  {
    delete elem;

    elem = iterator->nextElement();
  }
  delete iterator;

  delete ShellCommandBase::commandList;
  ShellCommandBase::commandList = NULL;
}

/**
 * unregister an existing commandName
 * @param className the name of the Class the command belongs to.
 * @param commandName the name of the command itself
 *
 * @todo implement
 */
void ShellCommandBase::unregisterCommand(const char* commandName, const char* className)
{
  PRINTF(1)("IMPLEMENT THIS\n");
}

tList<ShellCommandBase>* ShellCommandBase::commandList = NULL;


/**
 * checks if a command has already been registered.
 * @param commandName the name of the Command
 * @param className the name of the Class the command should apply to.
 * @param paramCount how many arguments the Command takes
 * @returns true, if the command is registered/false otherwise
 *
 * This is used internally, to see, if we have multiple command subscriptions.
 * This is checked in the registerCommand-function.
 */
bool ShellCommandBase::isRegistered(const char* commandName, const char* className, unsigned int paramCount, ...)
{
  va_list parameterList;
  va_start(parameterList, paramCount);

  if (ShellCommandBase::commandList == NULL)
  {
    ShellCommandBase::commandList = new tList<ShellCommandBase>;
    ShellCommand<ShellCommandBase>::registerCommand("debug", "ShellCommand", &ShellCommandBase::debugDyn);
    return false;
  }

  tIterator<ShellCommandBase>* iterator = ShellCommandBase::commandList->getIterator();
  ShellCommandBase* elem = iterator->firstElement();
  while(elem != NULL)
  {
    if (!strcmp(className, elem->className) && !strcmp(commandName, elem->getName()))
    {
      PRINTF(2)("Command already registered\n");
      delete iterator;
      return true;
    }
    elem = iterator->nextElement();
  }
  delete iterator;
  return false;
}


/**
 * executes commands
 * @param executionString the string containing the following input
 * ClassName [ObjectName] functionName [parameter1[,parameter2[,...]]]
 * @return true on success, false otherwise.
 */
bool ShellCommandBase::execute(const char* executionString)
{
  if (ShellCommandBase::commandList == NULL)
    return false;

  tIterator<ShellCommandBase>* iterator = ShellCommandBase::commandList->getIterator();
  ShellCommandBase* elem = iterator->firstElement();
  while(elem != NULL)
  {
    printf("%s::%s\n", elem->className, elem->getName());
    if (!strncasecmp (executionString, elem->className, strlen(elem->className)) &&
         (*(executionString+strlen(elem->className)) == ' ' ||
          *(executionString+strlen(elem->className)) == ':' ))
    {
      const char* commandBegin = executionString + strlen(elem->className);

      PRINTF(4)("Class %s matches\n", elem->className);
      BaseObject* objectPointer = NULL;
      if (ClassList::StringToID(elem->className) & CL_MASK_SINGLETON == CL_MASK_SINGLETON)
      {
        while(*commandBegin == ' ')
          commandBegin++;
        if (strncmp (commandBegin, elem->getName(), strlen(elem->getName())) ||
            *(commandBegin + strlen(elem->getName())) != ' ' &&
            *(commandBegin + strlen(elem->getName())) != '\0')
        {
          elem = iterator->nextElement();
          continue;
        }
        PRINTF(4)("Command %s matches\n", elem->getName());
        // getting singleton-reference
        tList<BaseObject>* list =  ClassList::getList(elem->className);
        if (list != NULL)
          objectPointer = list->firstElement();
      }
      else
      {
        // checking for the Object
        while(*commandBegin == ' ')
          commandBegin++;
        tList<BaseObject>* list = ClassList::getList(elem->className);
        if (list == NULL)
          break;
        tIterator<BaseObject>* iterBO = list->getIterator();
        BaseObject* enumBO = iterBO->firstElement();
        while(enumBO != NULL)
        {
          if(!strncmp(commandBegin, enumBO->getName(), strlen(enumBO->getName())))
          {
            PRINTF(4)("Object %s matches\n", enumBO->getName());
            objectPointer = enumBO;
            break;
          }
          enumBO = iterBO->nextElement();
        }
        delete iterBO;

        // break on no object Found. We cannot operate on Classes, but on Objects
        if (objectPointer == NULL)
          break;
        commandBegin = commandBegin + strlen(objectPointer->getName());
        while(*commandBegin == ' ')
          commandBegin++;
        // checking for the requested function.
        if (strncmp (commandBegin, elem->getName(), strlen(elem->getName())))
        {
          elem = iterator->nextElement();
          continue;
        }
        PRINTF(4)("Function '%s' found\n", commandBegin);
      }
      const char* paramBegin = strchr(commandBegin, ' ');
      if (paramBegin == NULL)
        paramBegin = commandBegin + strlen(elem->getName());
      while (*paramBegin == ' ')
        paramBegin++;

      PRINTF(3)("Parameters to Pass: %s\n", paramBegin);
      if (objectPointer != NULL && paramBegin != NULL)
      {
        elem->executeCommand(objectPointer, paramBegin);
        delete iterator;
        return true;
      }
    }
    elem = iterator->nextElement();
  }
  delete iterator;
  return true;
}

/**
 * lets a command be described
 * @param description the description of the Given command
 */
ShellCommandBase* ShellCommandBase::describe(const char* description)
{
  if (this == NULL)
    return NULL;
 else
 {
   this->description = description;
   return this;
 }
}

/**
 * see ShellCommandBase::debug()
 */
void ShellCommandBase::debugDyn()
{
  this->debug();
}

/**
 * prints out nice information about the Shells Commands
 */
void ShellCommandBase::debug()
{
  if (ShellCommandBase::commandList == NULL)
  {
    PRINT(0)("No Command registered so far\n");
    return;
  }

  tIterator<ShellCommandBase>* iterator = ShellCommandBase::commandList->getIterator();
  ShellCommandBase* elem = iterator->firstElement();
  while(elem != NULL)
  {
    PRINT(0)("Class:'%s':command:'%s':params:%d: ", elem->className, elem->getName(), elem->paramCount);
    for (unsigned int i = 0; i< elem->paramCount; i++)
      printf("%s ", ShellCommandBase::paramToString(elem->parameters[i]));
    if (elem->description != NULL)
      printf("- %s", elem->description);
    printf("\n");

    elem = iterator->nextElement();
  }
  delete iterator;
}

/**
 * converts a Parameter to a String
 * @param parameter the Parameter we have.
 * @returns the Name of the Parameter at Hand
 */
const char* ShellCommandBase::paramToString(long parameter)
{
  switch (parameter)
  {
    case ParameterBool:
      return "BOOL";
      break;
    case ParameterChar:
      return "CHAR";
      break;
    case ParameterString:
      return "STRING";
      break;
    case ParameterInt:
      return "INT";
      break;
    case ParameterUInt:
      return "UINT";
      break;
    case ParameterFloat:
      return "FLOAT";
      break;
    case ParameterLong:
      return "LONG";
      break;
    default:
      return "NULL";
      break;
  }
}