Wetterdienst

2026-08-23 20:51:19 +02:00
parent cc973418f3
commit 1b32166ce0
21 changed files with 1186 additions and 3 deletions
@@ -0,0 +1,73 @@
+using System.Net;
+using System.Net.Http.Json;
+using System.Text.Json;
+using LehrerApp.Core.Models;
+
+namespace LehrerApp.Desktop.Services;
+
+public sealed class SchoolWeatherException(string message) : Exception(message);
+
+/// <summary>Client für das serverseitige Schulstandort-/Wetterprofil. Liest URL und Token je
+/// Aufruf, damit ein Login oder Serverwechsel in den Einstellungen sofort berücksichtigt wird.</summary>
+public sealed class SchoolWeatherService(HttpClient http, SyncSettingsService syncSettings)
+{
+    public bool IsAvailable => !string.IsNullOrWhiteSpace(syncSettings.ServerUrl) && syncSettings.IsLoggedIn;
+
+    public async Task<SchoolLocationProfile?> GetLocationAsync(CancellationToken cancellationToken = default)
+    {
+        using var response = await SendAsync(HttpMethod.Get, "/api/school/location", null, cancellationToken);
+        if (response.StatusCode == HttpStatusCode.NotFound) return null;
+        await EnsureSuccessAsync(response);
+        return await response.Content.ReadFromJsonAsync<SchoolLocationProfile>(cancellationToken);
+    }
+
+    public async Task<SchoolLocationProfile> SaveLocationAsync(SchoolLocationRequest location,
+        CancellationToken cancellationToken = default)
+    {
+        using var response = await SendAsync(HttpMethod.Put, "/api/school/location", location, cancellationToken);
+        await EnsureSuccessAsync(response);
+        return await response.Content.ReadFromJsonAsync<SchoolLocationProfile>(cancellationToken)
+            ?? throw new SchoolWeatherException("Der Server hat keine Standortdaten zurückgegeben.");
+    }
+
+    public async Task<WeatherSnapshot?> GetWeatherAsync(CancellationToken cancellationToken = default)
+    {
+        using var response = await SendAsync(HttpMethod.Get, "/api/school/weather", null, cancellationToken);
+        if (response.StatusCode == HttpStatusCode.NotFound) return null;
+        await EnsureSuccessAsync(response);
+        return await response.Content.ReadFromJsonAsync<WeatherSnapshot>(cancellationToken);
+    }
+
+    private async Task<HttpResponseMessage> SendAsync(HttpMethod method, string path, object? body,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(syncSettings.ServerUrl) || !syncSettings.IsLoggedIn)
+            throw new SchoolWeatherException("Bitte zuerst im Reiter „Synchronisation“ am Server anmelden.");
+        using var request = new HttpRequestMessage(method, new Uri(new Uri(syncSettings.ServerUrl), path));
+        var token = syncSettings.GetToken();
+        if (token is not null)
+            request.Headers.Authorization = new("Bearer", token);
+        if (body is not null) request.Content = JsonContent.Create(body);
+        try { return await http.SendAsync(request, cancellationToken); }
+        catch (HttpRequestException)
+        {
+            throw new SchoolWeatherException("Der LehrerApp-Server ist nicht erreichbar.");
+        }
+    }
+
+    private static async Task EnsureSuccessAsync(HttpResponseMessage response)
+    {
+        if (response.IsSuccessStatusCode) return;
+        if (response.StatusCode == HttpStatusCode.Unauthorized)
+            throw new SchoolWeatherException("Die Server-Anmeldung ist abgelaufen. Bitte erneut anmelden.");
+        try
+        {
+            using var document = JsonDocument.Parse(await response.Content.ReadAsStringAsync());
+            if (document.RootElement.TryGetProperty("detail", out var detail) &&
+                !string.IsNullOrWhiteSpace(detail.GetString()))
+                throw new SchoolWeatherException(detail.GetString()!);
+        }
+        catch (JsonException) { }
+        throw new SchoolWeatherException("Der Schulstandort konnte nicht gespeichert werden.");
+    }
+}