TinyInvoice/Server/Data/SettingsData.cs

using System.Text.Json;
using System.Text.Json.Serialization;
using Server.Model;

namespace Server.Data
{
    public class SettingsData
    {
        #region Public Properties

        public static SettingsData Instance { get; set; } = new();

        public Address SellerAddress { get; set; } = new();

        public PaymentData PaymentData { get; set; } = new();
        
        public string? Comment { get; set; }

        #endregion


        /// <summary>
        /// Retrieves the file path for the settings JSON file.
        /// </summary>
        /// <returns>The file path of the settings JSON file as a string.</returns>
        private static string GetFilePath()
        {
            var parentDirectory = Directory.GetParent(Directory.GetCurrentDirectory());
            if (parentDirectory == null) return "Settings.json";

            return Path.Combine(parentDirectory.FullName, "Settings.json");
        }
        
        #region Public Method Load

        /// <summary>
        ///     Asynchronously loads the settings from a JSON file and updates the current instance of <see cref="SettingsData" />.
        /// </summary>
        /// <returns>A task that represents the asynchronous load operation.</returns>
        public static async Task LoadAsync()
        {
            
            if (!File.Exists(GetFilePath())) return;
            var jsonString = await File.ReadAllTextAsync(GetFilePath());
            var deserialized = JsonSerializer.Deserialize<SettingsData>(jsonString)!;

            Instance = deserialized;
        }

        #endregion

        #region Public Method SaveAsync

        /// <summary>
        ///     Serializes the current instance of <see cref="SettingsData" /> and saves it to a JSON file asynchronously.
        /// </summary>
        /// <returns>A task that represents the asynchronous save operation.</returns>
        public static async Task SaveAsync()
        {
            var jsonString = JsonSerializer.Serialize(Instance, new JsonSerializerOptions { WriteIndented = true, DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull});
            await File.WriteAllTextAsync(GetFilePath(), jsonString);
        }

        #endregion
    }
}