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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
 *            messagehandler.cc
 *
 *  Mon Mar 26 15:35:24 CEST 2012
 *  Copyright 2012 Jonas Suhr Christensen
 *  jsc@umbraculum.org
 ****************************************************************************/

/*
 *  This file is part of Munia.
 *
 *  Munia 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.
 *
 *  Munia 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 Munia; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "messagehandler.h"
#include "debug.h"

// Defines global task_manager object
#include "taskmanager.h"

#include "messageparser.h"

MessageList handle_msg(MessageList msgList, clientid_t wsi) {

  MessageList outmsgs;

  MessageList::iterator it;
  for(it = msgList.begin();
      it != msgList.end();
      it++) {
    message_t &m = *it;
    
    switch(m.cmd) {
    case cmd::create: 
      {
        INFO(messagehandler, "Handling create command\n");
        try {
          taskid_t id;
          m.nodes = task_manager.createTask(m.create.parentid, &id);
          m.create.id = id;
          outmsgs.push_back(m);
        }
        catch (std::exception& e) {
          DEBUG(messagehandler, "Error creating task\n");
        }
      }
      break;

    case cmd::remove: 
      {
        INFO(messagehandler, "Handling remove command\n");
        try {
          TaskIdList ids = task_manager.subTasks(m.remove.id);
          TaskIdList::reverse_iterator id = ids.rbegin();
          while(id != ids.rend()) {
            task_t task = task_manager.task(*id);

            message_t m = create_msg_remove(task);
            m.nodes = task_manager.removeTask(task.id);
          
            outmsgs.push_back(m);
            id++;
            printf("!!!\n");
          }
        }
        catch (std::exception& e) {
          DEBUG(messagehandler, "Error remove task\n");
        }
      }
      break;

    case cmd::move: 
      {
        INFO(messagehandler, "Handling move command\n");
        try {
          task_t removetask = task_manager.task(m.move.id);
          TaskIdListPair tilpair = task_manager.moveTask(m.move.id, m.move.parentid);
          task_t createtask = task_manager.task(m.move.id);

          /*
          TaskIdList commonAncestors;
          TaskIdList removeAncestors;
          TaskIdList createAncestors;
          
          // find command ancestors and fill ancestors for remove command
          for(TaskIdList::iterator it_remove = tilpair.first.begin();
              it_remove != tilpair.first.end(); it_remove++) {
            taskid_t removeid = *it;
            bool common = false;
            for(TaskIdList::iterator it_create = tilpair.second.begin();
                it_create = != tilpair.second.end(); it_create++) {
              taskid_t createid = *id;
              if(removeid == createid) {
                commandAncestors.push_back(removeid);
                common = true;
              }
            }
            if(!common) {
              removeAncestors.push_back(removeid);
            }
          }

          // fill ancestors for create command
          for(TaskIdList::iterator it_create = tilpair.second.begin();
              it_create = != tilpair.second.end(); it_create++) {
            taskid_t createid = *id;
            if(removeid == createid) {
              commandAncestors.push_back(removeid);
              common = true;
            }
          }
          */

          message_t removemsg = create_msg_remove(removetask);
          removemsg.nodes = tilpair.first;
          message_t createmsg = create_msg_create(createtask);
          createmsg.nodes = tilpair.second;

          outmsgs.push_back(removemsg);
          outmsgs.push_back(createmsg);
        }
        catch (std::exception& e) {
          DEBUG(messagehandler, "Error moving task\n");
        }
      }
      break;

    case cmd::observe:
      {
        connection_handler.observe(wsi, m.observe.id);
        outmsgs.push_back(m);
      }
      break;

    case cmd::unobserve:
      connection_handler.unobserve(wsi, m.observe.id);
      outmsgs.push_back(m);
      break;

    case cmd::update: 
      {
        INFO(messagehandler, "Handling update command\n");
        try {
          task_t t;
          t.title = m.update.title;
          t.id = m.update.id;
          m.nodes = task_manager.updateTask(m.update.id, t);
          outmsgs.push_back(m);
        }
        catch (std::exception& e) {
          DEBUG(messagehandler, "Error updating task\n");
        }
      }
      break;
    default:
      WARN(messagehandler, "!!! Unknown command\n");
      break;
    }
    task_manager.tree.toStdOut();
    printf("%d affected nodes registered\n", m.nodes.size());
  }
  
  return outmsgs;
}

#ifdef TEST_MSGHANDLER
//Additional dependency files
//deps:
//Required cflags (autoconf vars may be used)
//cflags:
//Required link options (autoconf vars may be used)
//libs:
#include "test.h"

TEST_BEGIN;

// TODO: Put some testcode here (see test.h for usable macros).
TEST_TRUE(false, "No tests yet!");

TEST_END;

#endif/*TEST_MSGHANDLER*/