Basic push notification system for service alerts

Co-authored-by: Copilot <copilot@github.com>

3 files changed, 31 insertions, 1 deletions

diff --git a/src/Enmarcha.Backend/Data/Models/AlertSelector.cs b/src/Enmarcha.Backend/Data/Models/AlertSelector.cs
index 34b2de3..e2b01f1 100644
--- a/src/Enmarcha.Backend/Data/Models/AlertSelector.cs
+++ b/src/Enmarcha.Backend/Data/Models/AlertSelector.cs
@@ -13,7 +13,8 @@ public class AlertSelector
 
     public static AlertSelector FromStop(string feedId, string stopId) => new() { Raw = $"stop#{feedId}:{stopId}" };
     public static AlertSelector FromRoute(string feedId, string routeId) => new() { Raw = $"route#{feedId}:{routeId}" };
-    public static AlertSelector FromAgency(string feedId) => new() { Raw = $"agency#{feedId}" };
+    /// <param name="agencyGtfsId">Full GTFS agency id in the form <c>feedId:agencyId</c> (e.g. <c>vitrasa:1</c>).</param>
+    public static AlertSelector FromAgency(string agencyGtfsId) => new() { Raw = $"agency#{agencyGtfsId}" };
 
     public override string ToString() => Raw;
 }
diff --git a/src/Enmarcha.Backend/Data/Models/PushSubscription.cs b/src/Enmarcha.Backend/Data/Models/PushSubscription.cs
new file mode 100644
index 0000000..c72c40f
--- /dev/null
+++ b/src/Enmarcha.Backend/Data/Models/PushSubscription.cs
@@ -0,0 +1,20 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Enmarcha.Backend.Data.Models;
+
+[Table("push_subscriptions")]
+public class PushSubscription
+{
+    public Guid Id { get; set; }
+
+    /// <summary>Push endpoint URL provided by the browser's push service.</summary>
+    public string Endpoint { get; set; } = string.Empty;
+
+    /// <summary>P-256 DH public key for payload encryption (base64url).</summary>
+    [Column("p256dh_key")] public string P256DhKey { get; set; } = string.Empty;
+
+    /// <summary>Auth secret for payload encryption (base64url).</summary>
+    [Column("auth_key")] public string AuthKey { get; set; } = string.Empty;
+
+    [Column("created_at")] public DateTime CreatedAt { get; set; }
+}
diff --git a/src/Enmarcha.Backend/Data/Models/ServiceAlert.cs b/src/Enmarcha.Backend/Data/Models/ServiceAlert.cs
index 5f80e3c..39cf3fa 100644
--- a/src/Enmarcha.Backend/Data/Models/ServiceAlert.cs
+++ b/src/Enmarcha.Backend/Data/Models/ServiceAlert.cs
@@ -24,6 +24,15 @@ public class ServiceAlert
     [Column("event_end_date")] public DateTime EventEndDate { get; set; }
     [Column("hidden_date")] public DateTime HiddenDate { get; set; }
 
+    /// <summary>Incremented each time a push notification is sent for this alert.</summary>
+    public int Version { get; set; } = 1;
+
+    /// <summary>Set when a push notification was sent for the PreNotice phase.</summary>
+    [Column("pre_notice_notified_at")] public DateTime? PreNoticeNotifiedAt { get; set; }
+
+    /// <summary>Set when a push notification was sent for the Active phase.</summary>
+    [Column("active_notified_at")] public DateTime? ActiveNotifiedAt { get; set; }
+
     public AlertPhase GetPhase(DateTime? now = null)
     {
         now ??= DateTime.UtcNow;