SystemVariables.cs

namespace Money_CLI;

#pragma warning disable CS8602

using System;
using System.Text.Json;
using System.Text.Json.Serialization;
using Money_CLI.Controllers;
using Serilog;

public static class SystemVariables
{
    /// <summary>
    /// The path to the executable's directory.
    /// </summary>
    private static string _AppDomain => AppDomain.CurrentDomain.BaseDirectory;

    /// <summary>
    /// The full path to the System Variables file.
    /// </summary>
    private static string SystemVariablesFileName => @$"{_AppDomain}SystemVariables.json";

    /// <summary>
    /// The string containing System Variables in JSON format.
    /// </summary>
    private static string SystemVariablesString => File.ReadAllText(SystemVariablesFileName);

    /// <summary>
    /// The System Variables as Dictionary object.
    /// </summary>
    private static Dictionary<string, string>? SystemVariablesJSON => JsonSerializer.Deserialize<Dictionary<string, string>>(SystemVariablesString);

    /// <summary>
    /// Handles the path for the folder used to export data.
    /// </summary>
    public static string ExportFolder {
        get {
            try {
                return SystemVariablesJSON["EXPORT_FOLDER"];
            } catch (Exception) {
                return string.Empty;
            }
        }

        set {
            try {
                Dictionary<string, string>? _data = SystemVariablesJSON;

                _data["EXPORT_FOLDER"] = GenericController.EnsureDirectory(value);

                string json = JsonSerializer.Serialize(_data);
                File.WriteAllText(SystemVariablesFileName, json);

                Log.Information("Export folder has successfully been set.");
            } catch (Exception) {
                Log.Error("Could not set export folder.");
            }
        }
    }

    /// <summary>
    /// Handles the path for the folder used to host the database.
    /// </summary>
    public static string DatabaseFolder {
        get {
            try {
                return SystemVariablesJSON["DATABASE_FOLDER"];
            } catch (Exception) {
                return string.Empty;
            }
        }

        set {
            try {
                Dictionary<string, string>? _data = SystemVariablesJSON;

                string oldValue = _data["DATABASE_FOLDER"];

                _data["DATABASE_FOLDER"] = GenericController.EnsureDirectory(value);

                string json = JsonSerializer.Serialize(_data);
                File.WriteAllText(SystemVariablesFileName, json);

                Log.Information("Database folder has successfully been set.");
            } catch (Exception) {
                Log.Error("Could not set database folder.");
            }
        }
    }

    /// <summary>
    /// Handles the currency that is returned on export.
    /// </summary>
    public static string Currency {
        get {
            try {
                return SystemVariablesJSON["CURRENCY"];
            } catch (Exception) {
                return string.Empty;
            }
        }

        set {
            try {
                Dictionary<string, string>? _data = SystemVariablesJSON;

                string oldValue = _data["CURRENCY"];

                _data["CURRENCY"] = value;

                string json = JsonSerializer.Serialize(_data);
                File.WriteAllText(SystemVariablesFileName, json);

                Log.Information("Currency has successfully been set.");
            } catch (Exception) {
                Log.Error("Could not set currency.");
            }
        }
    }

    /// <summary>
    /// Ensures that the file for the system variables exists.
    /// </summary>
    public static bool EnsureCreated() {
        if (File.Exists(SystemVariablesFileName))
            return true;

        try {
            File.Create(SystemVariablesFileName).Close();

            Dictionary<string, string> _data = new Dictionary<string, string>();
            _data.Add("EXPORT_FOLDER", _AppDomain);
            _data.Add("DATABASE_FOLDER", _AppDomain);
            _data.Add("CURRENCY", "en-US");

            string json = JsonSerializer.Serialize(_data);
            File.WriteAllText(SystemVariablesFileName, json);

            Log.Information("System variables file has successfully been created.");

            return true;
        } catch (Exception) {
            Log.Error("Could not create system variables file.");

            return false;
        }
    }
}