Replace sparkbooth upload with photobooth uploader

PhotoboothUploader/Services/PhotoboothConnectClient.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using PhotoboothUploader.Models;
+
+namespace PhotoboothUploader.Services;
+
+public sealed class PhotoboothConnectClient
+{
+    private const int MaxRetries = 2;
+    private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(10);
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions = new()
+    {
+        PropertyNameCaseInsensitive = true,
+    };
+
+    public PhotoboothConnectClient(string baseUrl, string userAgent)
+    {
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(baseUrl),
+            Timeout = DefaultTimeout,
+        };
+
+        _httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd(userAgent);
+    }
+
+    public async Task<PhotoboothConnectResponse> RedeemAsync(string code, CancellationToken cancellationToken = default)
+    {
+        var request = new { code };
+
+        for (var attempt = 0; attempt <= MaxRetries; attempt++)
+        {
+            try
+            {
+                using var response = await _httpClient.PostAsJsonAsync("/api/v1/photobooth/connect", request, cancellationToken);
+                var payload = await ReadPayloadAsync(response, cancellationToken);
+
+                if (response.IsSuccessStatusCode)
+                {
+                    return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+                }
+
+                if (response.StatusCode is HttpStatusCode.UnprocessableEntity or HttpStatusCode.Conflict or HttpStatusCode.Unauthorized)
+                {
+                    return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+                }
+
+                if (attempt < MaxRetries && IsTransientStatus(response.StatusCode))
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+            }
+            catch (TaskCanceledException) when (!cancellationToken.IsCancellationRequested)
+            {
+                if (attempt < MaxRetries)
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return Fail("Zeitüberschreitung bei der Verbindung.");
+            }
+            catch (HttpRequestException)
+            {
+                if (attempt < MaxRetries)
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return Fail("Netzwerkfehler. Bitte Verbindung prüfen.");
+            }
+            catch (JsonException)
+            {
+                return Fail("Serverantwort konnte nicht gelesen werden.");
+            }
+        }
+
+        return Fail("Verbindung fehlgeschlagen.");
+    }
+
+    private async Task<PhotoboothConnectResponse?> ReadPayloadAsync(HttpResponseMessage response, CancellationToken cancellationToken)
+    {
+        if (response.Content.Headers.ContentLength == 0)
+        {
+            return null;
+        }
+
+        return await response.Content.ReadFromJsonAsync<PhotoboothConnectResponse>(_jsonOptions, cancellationToken);
+    }
+
+    private static bool IsTransientStatus(HttpStatusCode statusCode)
+    {
+        return statusCode is HttpStatusCode.RequestTimeout or HttpStatusCode.TooManyRequests
+            or HttpStatusCode.BadGateway or HttpStatusCode.ServiceUnavailable or HttpStatusCode.GatewayTimeout
+            or HttpStatusCode.InternalServerError;
+    }
+
+    private static TimeSpan GetRetryDelay(int attempt)
+    {
+        return TimeSpan.FromMilliseconds(500 * (attempt + 1));
+    }
+
+    private static PhotoboothConnectResponse Fail(string message)
+    {
+        return new PhotoboothConnectResponse
+        {
+            Message = message,
+        };
+    }
+}