support PWA notification.

2026-06-29 22:20:15 -07:00
parent 45d910b554
commit b9210f2501
32 changed files with 1054 additions and 12 deletions
@@ -0,0 +1,40 @@
+using System.Net;
+using WebPush;
+
+namespace ROLAC.API.Services.Notifications;
+
+/// <summary>
+/// Sends one encrypted Web Push message via the WebPush library, signing with the VAPID keys from
+/// the notification settings. Translates a "subscription gone" (404/410) response into
+/// <see cref="WebPushSendResult.IsExpired"/> so the caller prunes the dead subscription.
+/// </summary>
+public sealed class WebPushSender : IWebPushSender
+{
+    private readonly INotificationSettingsService _settings;
+    private readonly WebPushClient _client = new();
+
+    public WebPushSender(INotificationSettingsService settings) => _settings = settings;
+
+    public async Task<WebPushSendResult> SendAsync(
+        WebPushTarget target, string payloadJson, CancellationToken ct = default)
+    {
+        var options = _settings.GetWebPush();
+        if (string.IsNullOrWhiteSpace(options.PublicKey) || string.IsNullOrWhiteSpace(options.PrivateKey))
+            return new WebPushSendResult(Success: false, IsExpired: false, Error: "Web Push is not configured (missing VAPID keys).");
+
+        var subject = string.IsNullOrWhiteSpace(options.Subject) ? "mailto:admin@rolac.local" : options.Subject;
+        var vapid = new VapidDetails(subject, options.PublicKey, options.PrivateKey);
+        var subscription = new PushSubscription(target.Endpoint, target.P256dh, target.Auth);
+
+        try
+        {
+            await _client.SendNotificationAsync(subscription, payloadJson, vapid, ct);
+            return new WebPushSendResult(Success: true, IsExpired: false, Error: null);
+        }
+        catch (WebPushException ex)
+        {
+            var expired = ex.StatusCode is HttpStatusCode.NotFound or HttpStatusCode.Gone;
+            return new WebPushSendResult(Success: false, IsExpired: expired, Error: ex.Message);
+        }
+    }
+}