PlanTempusApp/Core/Configurations/ConfigurationManager/JsonConfigurationSection.cs

using Newtonsoft.Json.Linq;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Primitives;

namespace Configuration.Core
{
    public class JsonConfigurationSection : IConfigurationSection
    {
        private readonly JObject _data;
        private readonly string _path;
        private readonly string _normalizedPath;

        public JsonConfigurationSection(JObject data, string path)
        {
            _data = data ?? throw new ArgumentNullException(nameof(data));
            _path = path ?? throw new ArgumentNullException(nameof(path));
            _normalizedPath = NormalizePath(_path);
        }

        public string this[string key]
        {
            get
            {
                if (string.IsNullOrEmpty(key))
                    throw new ArgumentNullException(nameof(key));

                var token = _data.SelectToken($"{_normalizedPath}.{NormalizePath(key)}");
                return token?.ToString();
            }
            set => throw new NotImplementedException("Setting values is not supported.");
        }

        public string Key => _path.Split(':').Last();
        public string Path => _path;

        public string Value
        {
            get
            {
                var token = _data.SelectToken(_normalizedPath);
                return token?.ToString();
            }
            set => throw new NotImplementedException("Setting values is not supported.");
        }

        public IConfigurationSection GetSection(string key)
        {
            if (string.IsNullOrEmpty(key))
                throw new ArgumentNullException(nameof(key));

            return new JsonConfigurationSection(_data, string.IsNullOrEmpty(_path) ? key : $"{_path}:{key}");
        }

        public JToken GetToken() => _data.SelectToken(_normalizedPath);

        public IEnumerable<IConfigurationSection> GetChildren()
        {
            var token = _data.SelectToken(_normalizedPath);
            if (token is JObject obj)
            {
                return obj.Properties()
                    .Select(p => new JsonConfigurationSection(_data, string.IsNullOrEmpty(_path) ? p.Name : $"{_path}:{p.Name}"));
            }
            return Enumerable.Empty<IConfigurationSection>();
        }

        public T Get<T>() where T : class
        {
            var token = _data.SelectToken(_normalizedPath);
            return token?.ToObject<T>();
        }

        public IChangeToken GetReloadToken() => new ConfigurationReloadToken();

        private static string NormalizePath(string path)
        {
            return path?.Replace(":", ".", StringComparison.Ordinal) ?? string.Empty;
        }
    }
}