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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
 *            task.h
 *
 *  Fri Feb 24 08:16:29 CET 2012
 *  Copyright 2012 Bent Bisballe Nyeng
 *  deva@aasimon.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.
 */
#ifndef __MUNIA_TASK_H__
#define __MUNIA_TASK_H__

#include <list>
#include <string>
#include <stdio.h>
#include <assert.h>
//#include <queue>

/*
Task:
  id
  subtasks
//  tags
  title
  description
//  primary_assignment
//  secondary_assignment


Protocol:

Server -> client:
 update [id] [title] [description];
 move [id] [x] [y];
 add [id] [title] [description] [x] [y];
 del [id]

Client -> server:
 update [id] [title] [description];
 move [id] [x] [y];
 add [title] [description] [x] [y];
 del [id]

title and description are " encapsulated utf-8 string with " escaped with a backslash.
x and y are integers as strings
id are an integer as a string
 */

/*
typedef struct {
  int x, y;
  int id;
  std::string title;
  std::string desc;
} task_t;
*/
/*
protocol:
  add_task title description parent_id
  del_task id
  update_task id title description
  move_task id parent
  copy_task id parent
*/

typedef struct {
  int id;
  int parent_id;
  std::string title;
  std::string desc;
} task_t;


//typedef std::list<task_t> TaskList;

class CompareByParentid {
public:
  bool operator()(const task_t &a, const task_t &b) const {
    return a.parent_id < b.parent_id;
  }
};




class TaskList : public std::list<task_t>{
public:
  TaskList() {}
  ~TaskList(){}

  void insert(task_t t) {
    printf("inserting task %d with parent %d\n", t.id, t.parent_id);
    
    if(t.parent_id == -1) {
      std::list<task_t>::push_front(t);
      return;
    }
    
    std::list<task_t>::iterator it;
    for(it = begin(); it != end(); ++it) {
      printf("\tcomparing %d and %d\n", t.parent_id, it->id);
      if(t.parent_id == it->id) {
        break;
      }
    }
    assert(it != end());

    std::list<task_t>::insert(++it, t);
    
//    std::list<task_t>::push_back(t);
//    std::list<task_t>::sort(CompareByParentid());
    
  }
  
  void move(task_t t) {
    std::list<task_t>::iterator it;
    for(it = begin(); it != end(); it++) {
      if(t.id == it->id) {
        break;
      }
    }
    assert(it != end());
    //    if(it != end()) {
      std::list<task_t>::erase(it);
      //    }
    insert(t);
  }

  void push_back(task_t t) {
    insert(t);
  }

private:
    std::list<task_t> list;
};


extern TaskList tasklist;

//typedef std::priority_queue<task_t, std::vector<task_t>, CompareByParentid> TaskList;

task_t create_task(std::string title, std::string desc, 
                   /*int x, int y*/ int parent_id);

TaskList load_tasklist_from_file(std::string file);
bool save_tasklist_to_file(TaskList t, std::string file);

#endif/*__MUNIA_TASK_H__*/