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 //
 // C++ Interface: cMacroManager, cMacro, cFunction
 //
 /*
 Copyright 2005-2011 Tomas Mecir <kmuddy@kmuddy.com>
 
 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 of 
 the License, or (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef CMACROMANAGER_H
 #define CMACROMANAGER_H
 
 #include <cactionbase.h>
 
 #include <cvalue.h>
 #include <list>
 #include <kmuddy_export.h>
 
 class cActionManager;
 class cFunction;
 class cMacro;
 class cVariableList;
 class cCmdQueue;
 class cCmdQueueEntry;
 struct cMacroManagerPrivate;
 
 /**
 This is the macro manager. It manages and calls macros and functions.
 It follows the Singleton pattern.
 
 @author Tomas Mecir
 */
 class KMUDDY_EXPORT cMacroManager : public cActionBase
 {
 public:
   /** return an instance */
   static cMacroManager *self ();
   /** destructor */
   ~cMacroManager () override;
 
   void addMacro (const QString &name, cMacro *macro);
   void removeMacro (const QString &name);
   /** return the macro with this name */
   cMacro *macro (const QString &name);
   /** Call a given macro with given parameters. May optionally accept a session number, and
   a pointer to the current command stack. */
   bool callMacro (const QString &name, const QString &par, int sess = -1, cCmdQueue *queue = nullptr);
   void addFunction (const QString &name, cFunction *function);
   void removeFunction (const QString &name);
   /** Call a given function with given parameters. May optionally accept a session number, and
   a pointer to the current command stack. */
   cValue callFunction (const QString &name, std::list<cValue> &params, int sess = -1,
       cCmdQueue *queue = nullptr);
   bool functionExists (const QString &name);
 private:
   /** constructor */
   cMacroManager ();
   static cMacroManager *_self;
 
   cMacroManagerPrivate *d;  
 };
 
 /** The cMacro class represents one macro. */
 class KMUDDY_EXPORT cMacro {
  public:
   cMacro (const QString &name);
   virtual ~cMacro ();
   virtual void eval (const QString &params, int sess = -1, cCmdQueue *queue = nullptr) = 0;
   virtual bool preprocess (cCmdQueue *, cCmdQueueEntry *) { return true; };
  protected:
   QString n;
   // just some convenience aliases ...
   cActionManager *am;
   cVariableList *varList (int sess);
   QString expandVariables (const QString &str, int sess, cCmdQueue *queue);
 };
 
 /** The cFunction class represents one function. */
 class KMUDDY_EXPORT cFunction {
  public:
   cFunction (const QString &name);
   virtual ~cFunction ();
   virtual cValue eval (std::list<cValue> &params, int sess = -1, cCmdQueue *queue = nullptr) = 0;
  protected:
   QString n;
   // just some convenience aliases ...
   cActionManager *am;
   cVariableList *varList (int sess);
 };
 
 #endif