How to convert data structure to another tree structure

Question

I need your help for create a tree like data structure with given JSON as shown below and required output structure already given below. I am a beginner in programming and I have only a little knowledge in data structure

JSON from API

   [
    "",
    [
        "Test",
        [
            "Test/sample",
            [
                "Test/sample/sample1"
            ]
        ],
        [
            "Test/test3"
        ]
    ],
    [
        "Test1",
        [
            "Test1/test2"
        ]
    ],
    [
        "cat"
    ]
]

Output like below structure

 {
        "key": "Image",
        "label": "Image",
        "icon": 'pi pi-folder',
        "children": []
    },

    {
        "key": "Test",
        "label": "Test",
        "icon": "pi pi-folder",

        "children": [
            {
                "key": "Test/sample",
                "label": "Sample",
                "icon": "pi pi-folder",

                "children": [{
                    "key": "Test/sample/sample1",
                    "label": "Sample1",
                    "icon": 'pi pi-folder',
                    "children": []
                }]
            },
            {
                "key": "Test/test3",
                "label": "test3",
                "icon": "pi pi-folder",
                "children": []
            },
        ]
    },

    {
        "key": "Test1",
        "label": "Test1",
        "icon": "pi pi-folder",
        "children": [{
            "key": "Test1/test2",
            "label": "test2",
            "icon": "pi pi-folder",
            "children": []
        }]
    },

    {
        "key": "cat",
        "label": "cat",
        "icon": "pi pi-folder",
        "children": []
    },

]

Above structure is image file directory and directory name is indicated by label and icon is indicating directory, children show sub directory

Console value of API

Answer 1

It can easily archive with recursive function

 const icon = "pi pi-folder"; var a = [ "", [ "Test", [ "Test/sample", [ "Test/sample/sample1" ] ], [ "Test/test3" ] ], [ "Test1", [ "Test1/test2" ] ], [ "cat" ] ] /** * @param {Array} arr The child array */ function createChildNode(arr) { let key = "Image"; let label = "Image"; let children = []; if (arr.length >= 1) { key = arr[0]; label = key.includes("/")? key.split("/").pop(): key; label = label.charAt(0).toUpperCase() + label.slice(1); for (let index = 1; index < arr.length; index++) { const element = arr[index]; children.push(createChildNode(element)); } } return {key: key, label: label, icon: icon, children: children}; } var b = [] for (let index = 0; index < a.length; index++) { const element = a[index]; b.push(createChildNode(element)); } console.log(b);