var Class = require('../utils/Class'); 
var ImageCollection = new Class({ 
initialize: function ImageCollection(name, firstgid, width, height, margin, spacing, properties){ 
if (width === undefined || width <= 0) { 
width = 32; 
} 
if (height === undefined || height <= 0) { 
height = 32; 
} 
if (margin === undefined) { 
margin = 0; 
} 
if (spacing === undefined) { 
spacing = 0; 
} 
this.name = name; 
this.firstgid = firstgid | 0; 
this.imageWidth = width | 0; 
this.imageHeight = height | 0; 
this.imageMargin = margin | 0; 
this.imageSpacing = spacing | 0; 
this.properties = properties || { 
}
; 
this.images = [] ; 
this.total = 0; 
} 
,
containsImageIndex: function (imageIndex){ 
return (imageIndex >= this.firstgid && imageIndex < (this.firstgid + this.total)); 
} 
,
addImage: function (gid, image){ 
this.images.push({ 
gid: gid,
image: image}
); 
this.total++ ; 
return this; 
} 
}
); 
module.exports = ImageCollection;