Wetterdienst

2026-08-23 20:51:19 +02:00
parent cc973418f3
commit 1b32166ce0
21 changed files with 1186 additions and 3 deletions
@@ -0,0 +1,83 @@
+using LehrerApp.Core.Models;
+using LiteDB;
+
+namespace LehrerApp.Api;
+
+/// <summary>Unverschlüsselte Serverdaten, die der Server zur Abfrage standortbezogener öffentlicher
+/// Wetterdaten benötigt. Bewusst getrennt vom clientseitig verschlüsselten EventStore.</summary>
+public sealed class SchoolWeatherStore : IDisposable
+{
+    private readonly LiteDatabase _db;
+
+    public SchoolWeatherStore(string dataPath)
+    {
+        Directory.CreateDirectory(dataPath);
+        _db = new LiteDatabase(Path.Combine(dataPath, "school-weather.db"));
+    }
+
+    private ILiteCollection<LocationEntry> Locations
+    {
+        get
+        {
+            var col = _db.GetCollection<LocationEntry>("locations");
+            col.EnsureIndex(x => x.UserId, unique: true);
+            return col;
+        }
+    }
+
+    private ILiteCollection<WeatherEntry> Weather
+    {
+        get
+        {
+            var col = _db.GetCollection<WeatherEntry>("weather");
+            col.EnsureIndex(x => x.UserId, unique: true);
+            return col;
+        }
+    }
+
+    public SchoolLocationProfile? GetLocation(string userId) =>
+        Locations.FindOne(x => x.UserId == userId)?.Profile;
+
+    public void SaveLocation(string userId, SchoolLocationProfile profile)
+    {
+        var existing = Locations.FindOne(x => x.UserId == userId);
+        Locations.Upsert(new LocationEntry
+        {
+            Id = existing?.Id ?? ObjectId.NewObjectId(),
+            UserId = userId,
+            Profile = profile,
+        });
+        // Ein geänderter Standort darf niemals den Wetterstand des alten Orts liefern.
+        Weather.DeleteMany(x => x.UserId == userId);
+    }
+
+    public WeatherSnapshot? GetWeather(string userId) =>
+        Weather.FindOne(x => x.UserId == userId)?.Snapshot;
+
+    public void SaveWeather(string userId, WeatherSnapshot snapshot)
+    {
+        var existing = Weather.FindOne(x => x.UserId == userId);
+        Weather.Upsert(new WeatherEntry
+        {
+            Id = existing?.Id ?? ObjectId.NewObjectId(),
+            UserId = userId,
+            Snapshot = snapshot,
+        });
+    }
+
+    public void Dispose() => _db.Dispose();
+
+    private sealed class LocationEntry
+    {
+        public ObjectId Id { get; set; } = ObjectId.NewObjectId();
+        public string UserId { get; set; } = "";
+        public SchoolLocationProfile Profile { get; set; } = new();
+    }
+
+    private sealed class WeatherEntry
+    {
+        public ObjectId Id { get; set; } = ObjectId.NewObjectId();
+        public string UserId { get; set; } = "";
+        public WeatherSnapshot Snapshot { get; set; } = new();
+    }
+}