using System;

using System.Text.Json.Nodes;

using System.Linq;

​

// Example usage:

public class Program

{

    public static void Main()

    {

        // Example 2: An object with a non-empty string.

        var json = JsonObject.Parse(

            """

            {

                "1": "",

                "2": null,

                "3": "not null",

                "4": [],

                "5": true,

                "6": false,

                "7": {},

                "8": {

                    "not empty": "not empty"

                }

            }

            """

                ).AsObject();

        foreach(var item in json)

        Console.WriteLine($"item {item.Key}: IsEmpty:  " + JsonHelper.IsEmpty(item.Value) + "; Is Not Empty: " + !JsonHelper.IsEmpty(item.Value));

    }

}

​

public class JsonHelper

{

    /// <summary>

    /// Checks whether a JsonObject is empty.

    /// An object is empty if it is null or if every property is empty.

    /// </summary>

    /// <param name="jsonObject">The JsonObject to check.</param>

    /// <returns>True if the JsonObject is empty; otherwise, false.</returns>

    public static bool IsEmpty(JsonNode node) =>

        node switch

        {

            null => true,

            // If it's a JsonValue and a string, check if the string is null or empty.

            JsonValue value when value.TryGetValue<string>(out var s) => string.IsNullOrEmpty(s),

            // Arrays are empty if they have no elements.

            JsonArray array => array.Count == 0,

            // Objects are empty if every property value is empty.

            JsonObject obj => obj.All(kvp => IsEmpty(kvp.Value)),

            // For any other node type, assume it is not empty.

            _ => false

        };

​

}

​

​

​