S70 To-Do 02

var todo = (function(){
    var tasks = [];
    
    var STATE_P = '진행';
    var STATE_C = '완료';
    
    var addTask = (function(){
        var id = 0;
    
        return function(title){
            tasks.push({id: id++, title: title, state: STATE_P});
            render();
        }
    })();
    
    var removeTask = function(id){
        var isRemoved = false;
        for(var i =0; i< tasks.length; i++){
            if(tasks[i].id === id){
                tasks.splice(i,1);
                isRemoved = true;
                break;
            }
        }
    
        if(!isRemoved) {
            warning('removeTask : invalid id');
        }
        render();
    };
    
    var changeState = function(id, state){
        var ID = false, STATE;
        for(var i = 0; i < tasks.length; i++){
            if(tasks[i].id === id){
                ID = id;
                break;
            }
        }
        if(ID === false) {
            warning('changeState : invalid id - ' + id);
            return;
        }
        if(STATE_P !== state && STATE_C !== state){
            warning('changeState : invalid state - ' + state);
            return;
        }else{
            STATE = state;
        }
    
        for(var i =0; i< tasks.length; i++){
            if(tasks[i].id === ID){
                tasks[i].state = STATE;
                break;
            }
        }
        render();
    };
    
    var warning = console.log;
    
    var render = function(){
        var task;
        console.log('진행');
        for(var i = 0; i < tasks.length; i++){
            task = tasks[i];
            if(task.state === '진행'){
                console.log(task.id+'.', task.title+'('+task.state+')');
            }
        }
    
        console.log('완료');
        for(var i = 0; i < tasks.length; i++){
            task = tasks[i];
            if(task.state === '완료'){
                console.log(task.id+'.', task.title+'('+task.state+')');
            }
        }
    };
    
    return {
	addTask : addTask,
	removeTask: removeTask,
	changeState: changeState
    }
})();