LehrerApp/LehrerApp.Core/Services/SchoolCalendarSettingsService.cs

using System.Text.Json;
using LehrerApp.Core.Models;

namespace LehrerApp.Core.Services;

internal class SchoolCalendarConfig
{
    public GermanState State { get; set; } = GermanState.NW;
}

/// <summary>Welches Bundesland für die Feiertagsberechnung (4.3.5) gilt.</summary>
public class SchoolCalendarSettingsService
{
    private readonly string _configPath;
    private SchoolCalendarConfig _config;

    public GermanState State => _config.State;

    public SchoolCalendarSettingsService(string appDataPath)
    {
        _configPath = Path.Combine(appDataPath, "schoolcalendar.json");
        _config = Load();
    }

    public void SetState(GermanState state)
    {
        _config.State = state;
        File.WriteAllText(_configPath, JsonSerializer.Serialize(_config));
    }

    private SchoolCalendarConfig Load()
    {
        try
        {
            if (File.Exists(_configPath))
                return JsonSerializer.Deserialize<SchoolCalendarConfig>(File.ReadAllText(_configPath))
                       ?? new SchoolCalendarConfig();
        }
        catch { /* beschädigte Konfiguration -> Standardwert */ }
        return new SchoolCalendarConfig();
    }
}