model.js

var Model = (function () {
    function Model(storage) {
        this.storage = storage;
    }
    Model.prototype.create = function (title, callback) {
        title = title || '';
        callback = callback || function () { };
        var newItem = {
            title: title.trim(),
            completed: false
        };
        this.storage.save(newItem, callback);
    };
    ;
    Model.prototype.read = function (query, callback) {
        var queryType = typeof query;
        callback = callback || function () { };
        if (queryType === 'function') {
            callback = query;
            return this.storage.findAll(callback);
        }
        else if (queryType === 'string' || queryType === 'number') {
            query = parseInt(query, 10);
            this.storage.find({ id: query }, callback);
        }
        else {
            this.storage.find(query, callback);
        }
    };
    ;
    Model.prototype.update = function (id, data, callback) {
        this.storage.save(data, callback, id);
    };
    ;
    Model.prototype.remove = function (id, callback) {
        this.storage.remove(id, callback);
    };
    ;
    Model.prototype.removeAll = function (callback) {
        this.storage.drop(callback);
    };
    ;
    Model.prototype.getCount = function (callback) {
        var todos = {
            active: 0,
            completed: 0,
            total: 0
        };
        this.storage.findAll(function (data) {
            data.forEach(function (todo) {
                if (todo.completed) {
                    todos.completed++;
                }
                else {
                    todos.active++;
                }
                todos.total++;
            });
            callback(todos);
        });
    };
    ;
    return Model;
}());