var PHT = {};

PHT.validate = function(inputObj, callback) {
    var max_pixel = 10 * 1024 * 1024;
    var min_pixel = 144 * 144;
    var obj = inputObj.get(0);
    if (obj.files[0]) {
        if (obj.files[0].size > max_pixel) {
            inputObj.val('');
            callback.onError({'error': 'Sorry! Photo is over 10MB. Please upload another photo.'});
        } else if (obj.files[0].size < min_pixel) {
            inputObj.val('');
            callback.onError({'error': 'The photo you submitted is too small. Please submit a photo larger than 144x144 pixels.'});
        } else {
            callback.onSuccess();
        }
    } else {
        inputObj.val('');
        callback.onError({'error': 'You do not choose any photo.'});
    }
};

PHT.preview = function(inputObj, imgConObj, callback) {
    var url;
    var obj = inputObj.get(0);
    var fileName = inputObj.val();
    var extStart = fileName.lastIndexOf(".");
    var ext = fileName.substring(extStart, fileName.length).toUpperCase();

    if(ext != ".GIF" && ext != ".JPG" && ext != ".JPEG" && ext != ".PNG" && ext != ".BMP" && ext!=".TIFF"){
        this.cancel(inputObj, imgConObj);
        return false;
    }
    if (navigator.userAgent.indexOf("MSIE")>=1) { // IE
        url = obj.value;
    } else {
        url = window.URL.createObjectURL(obj.files.item(0));
    }
    imgConObj.find('img').attr('src', url );
    imgConObj.show();
    if ( typeof callback === 'function' ) {
        callback();
    }

    return true;
};

PHT.cancel = function(inputObj, imgConObj, callback) {
    var newInputObj = inputObj.clone(true);
    newInputObj.val('');
    newInputObj.insertAfter(inputObj);
    inputObj.remove();
    imgConObj.hide();
    if ( typeof callback === 'function' ) {
        callback();
    }
};