How to convert form input fields to nested json structure using jquery

Question

I would like to convert the below input fields into nested json file structure as per below in my html page, I've tried in a couple of ways, but unable to get. Here I am getting these inputs through angularjs ng-repeat. Please help me that how can i implement. Thanks in advance.

<form id="text" method="post" action="" enctype="multipart/form-data">
    <input type="hidden" value="/images/Image1.nii" name="imageurl">
    <input type="hidden" value="3d0"  name="3d" >
    <input type="hidden" value="sliceX0" name="sliceX"> 
    <input type="hidden" value="sliceY0" name="sliceY">
    <input type="hidden" value="sliceZ0" name="sliceZ">

    <input type="hidden" value="/images/Image2.nii" name="imageurl">
    <input type="hidden" value="3d1"  name="3d1" >
    <input type="hidden" value="sliceX1" name="sliceX"> 
    <input type="hidden" value="sliceY1" name="sliceY">
    <input type="hidden" value="sliceZ1" name="sliceZ">

</form>

As I am getting it in a normal json structure:

[{"name":"imageurl","value":"/images/Image1.nii"},{"name":"3d","value":"3d0"},{"name":"sliceX","value":"sliceX0"},{"name":"sliceY","value":"sliceY0"},{"name":"sliceZ","value":"sliceZ0"},{"name":"imageurl","value":"/images/Image2.nii"},{"name":"3d","value":"3d1"},{"name":"sliceX","value":"sliceX1"},{"name":"sliceY","value":"sliceY1"},{"name":"sliceZ","value":"sliceZ1"}]

but I need like below:

 [
        {"name":"imageurl","value":"/images/Image1.nii", parts: [
            {"name":"3d","value":"3d0"},
            {"name":"sliceX","value":"sliceX0"},
            {"name":"sliceY","value":"sliceY0"},    
            {"name":"sliceZ","value":"sliceZ0"},
        ]},

        {"name":"imageurl","value":"/images/Image2.nii", parts: [
            {"name":"3d","value":"3d1"},
            {"name":"sliceX","value":"sliceX1"},
            {"name":"sliceY","value":"sliceY1"},
            {"name":"sliceZ","value":"sliceZ1"}
        ]}
    ]

How to convert form input fields to nested json structure using jquery

Answer 1

You should use a helper library like lodash to do such data manipulation.

Here is a conversion which I did with lodash:

// split the data into chunks of 5 elements each
var chunks = _.chunk(data, 5);

// for every chunk create the desired object with the parts
var desired = _.map(chunks, function(c) {
  var image = c[0];
  image.parts = _.rest(c);
  return image;
});

console.log(desired);

Here is a working Plunker

Answer 2

You should wrap each image group in its own container. But if you must keep your current structure:

var el = document.querySelectorAll('#text [type="hidden"]');

var arr = [];

var obj = {};

var push = false;

for(var i = 0; i < el.length; i ++){

    if(el[i].value.indexOf('images') > -1){
        if(push){
            arr.push(obj);
            obj = {};
         };
        obj.name = 'imageurl';
        obj.value = el[i].value;
        push = true;
    }

    obj.parts = obj.parts || [];

    obj.parts.push({
        name: el[i].name,
        value: el[i].value
    });
}