76 lines
2.7 KiB
C#
76 lines
2.7 KiB
C#
using System.Collections.Concurrent;
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using Microsoft.Extensions.Options;
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namespace LehrerApp.Api;
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public sealed record WebUntisConnectRequest(
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string School,
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string? Host,
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string Username,
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string Password);
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public sealed record WebUntisConnectionStatus(bool Connected, string? School, string? Username);
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/// <summary>
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/// Hält persönliche WebUntis-Verbindungen ausschließlich im Arbeitsspeicher des Servers.
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/// Passwörter werden weder protokolliert noch serverseitig persistiert. Der enthaltene Client
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/// verwaltet die eigentliche WebUntis-Session und meldet sie nach Inaktivität wieder ab.
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/// </summary>
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public sealed class WebUntisConnectionStore(IHttpClientFactory httpClientFactory) : IAsyncDisposable
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{
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private sealed record Entry(WebUntisClient Client, string School, string Username);
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private readonly ConcurrentDictionary<string, Entry> _connections = new();
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public WebUntisClient? GetClient(string userId) =>
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_connections.TryGetValue(userId, out var entry) ? entry.Client : null;
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public WebUntisConnectionStatus GetStatus(string userId) =>
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_connections.TryGetValue(userId, out var entry)
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? new(true, entry.School, entry.Username)
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: new(false, null, null);
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public async Task<WebUntisConnectionStatus> ConnectAsync(string userId, WebUntisConnectRequest request,
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CancellationToken cancellationToken)
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{
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var options = new WebUntisOptions
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{
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School = request.School,
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Host = request.Host ?? "",
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Username = request.Username,
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Password = request.Password,
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Client = "LehrerApp",
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SessionIdleTimeoutMinutes = 10,
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};
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var client = new WebUntisClient(httpClientFactory.CreateClient("webuntis"), Options.Create(options));
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try
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{
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// Authentifiziert wirklich gegen WebUntis; ungültige Daten werden nicht gespeichert.
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await client.GetSchoolYearsAsync(cancellationToken);
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}
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catch
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{
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await client.DisposeAsync();
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throw;
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}
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var entry = new Entry(client, request.School.Trim(), request.Username.Trim());
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if (_connections.TryGetValue(userId, out var previous))
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await previous.Client.DisposeAsync();
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_connections[userId] = entry;
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return new(true, entry.School, entry.Username);
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}
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public async Task DisconnectAsync(string userId)
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{
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if (_connections.TryRemove(userId, out var entry)) await entry.Client.DisposeAsync();
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}
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public async ValueTask DisposeAsync()
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{
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var entries = _connections.Values.ToList();
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_connections.Clear();
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foreach (var entry in entries) await entry.Client.DisposeAsync();
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}
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}
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