Appolo Class

Simple and powerful class system for node js

Installation

npm install appolo-class --save

Usage

creating simple class

var Rectangle = Class.define({
    area: function () {
        return 25;
    }
});

 var rectangle = new Rectangle();

creating class with constractor

var Rectangle = Class.define({
    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },

    area: function () {
        return this.width * this.height;
    }
});

var rectangle = new Rectangle(5, 5);

console.log(rectangle.area()) // 25

Inheritance

var Rectangle = Class.define({

    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },
    area: function () {
        return this.width * this.height;
    }
});

var Square = Class.define({

    $config: {
        extends: Rectangle
    },
    
    constructor: function (side) {
        this.callParent(this, side, side);
    }
});

var square = new Square(6);

console.log(square.area()) // 36

you can also use Class.define fucntion

var Rectangle = Class.define({

    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },
    area: function () {
        return this.width * this.height;
    }
});

var Square = Rectangle.define({

    constructor: function (side) {
        this.callParent(side, side);
    }
});

var square = new Square(6);

console.log(square.area()) // 36

Call Parent

use this.callParent function to call the parent method

var Rectangle = Class.define({

    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },

    area: function () {
        return this.width * this.height;
    }
});

var Square = Rectangle.define({

    constructor: function (side) {
        this.callParent(side, side);
    }
});

var Cube = Square.define({

    constructor: function (side) {
        this.callParent(side);

        this.side = side;
    },

    area: function () {
        return 6 * this.callParent()
    },

    volume: function () {
        return Math.pow(this.side,3);
    }
});

var cube = new Cube(5);

console.log(cube.area()) //150;
console.log(cube.volume()) //125;

Statics

var Rectangle = Class.define({
    $config: {
        statics: {
            MIN_SIDE: 1,
            MAX_SIDE: 150
        }
    },

    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },

    area: function () {
        return this.width * this.height;
    }
});


console.log(Rectangle.MIN_SIDE) //1;

var rectangle = new Rectangle(5, 5);
console.log(rectangle.MIN_SIDE.should.equal(1)) //1;

Mixin

used to add protoype functions from other classes

var Events = Class.define({
    bind: function (event, fn) {
        return true;
    },
    unbind: function (event, fn) {
        return true;
    }
});

var Rectangle = Class.define({
    $config: {
        mixins: [Events]
    },

    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },

    area: function () {
        return this.width * this.height;
    }
});

var rectangle = new Rectangle(5, 5);
rectangle.bind('test',function(){})
rectangle.unbind('test',function(){})

Namespace

create class on the global scope

Class.define('Test.Position.Base', {

    constructor: function (symbol, amount, side) {

        this.symbol = symbol;
        this.amount = amount;
        this.side = side;
    }
});

Position.define('Test.Position.Long', {

    constructor: function (symbol, amount) {
        this.callParent( symbol, amount, 2);
    }
});

Position.define("Test.Position.Short", {

    constructor: function (symbol, amount) {

        this.callParent(symbol, amount, 2);
    }
});

var short = new Test.Position.Short();
var long = new Test.Position.Long();

Contractor Name

you can define the class name

var Position = Class.define({

    constructor: function (symbol, amount, side) {

        this.symbol = symbol;
        this.amount = amount;
        this.side = side;

    }
});

var Long = Position.define({
    $config: {
        name: "long"
    },

    constructor: function (symbol, amount) {
        this.callParent( symbol, amount, 2);
    }
});

var Short = Position.define({
    $config: {
        name: "short"
    },
    constructor: function (symbol, amount) {

        this.callParent(symbol, amount, 2);
    }
});


var short = new Short();
var long = new Long();

consloe.log(short.constructor.name) // short
console.log(long.constructor.name) //long;

Members (Properties)

define properties with getter and setter functions. if a property in defined to be a member and a getter or setter is not implemented then erro will be trown

var Rectangle = Class.define({
    $config: {
        members: ['area','name']
    },
    
    constructor: function (width, height) {
        this.height = height;
        this.width = width;
    },

    getArea: function () {
        return this.width * this.height;
    },
    getName:function(){
        return this._name;
    },
     setName:function(value){
        this._name = value;
    }
});

var rectangle = new Rectangle(5, 5);
console.log(rectangle.area) //25;

rectangle.area = 10 // error not implemented

Plugins

you can your custom plugins to the class system by adding callback function the function will be called with 3 arguments

• config - config object of the class
• klass - class referance
• parent - parent class referance

Class.addPlugin(function(config,klass,parent){
    //do something
});

Tests

    grunt test

License

The appolo class library is released under the MIT license. So feel free to modify and distribute it as you wish.