1 files changed, 19 insertions, 0 deletions
diff --git a/src/Enmarcha.Backend/Data/Models/AlertSelector.cs b/src/Enmarcha.Backend/Data/Models/AlertSelector.cs
new file mode 100644
index 0000000..34b2de3
--- /dev/null
+++ b/src/Enmarcha.Backend/Data/Models/AlertSelector.cs
@@ -0,0 +1,19 @@
+namespace Enmarcha.Backend.Data.Models;
+
+/// <summary>
+/// Defines the scope of an alert (e.g., "stop#vitrasa:1400", "route#xunta:123").
+/// This follows a URI-like pattern for easy parsing and matching.
+/// </summary>
+public class AlertSelector
+{
+    public string Raw { get; set; } = string.Empty;
+
+    public string Type => Raw.Split('#').FirstOrDefault() ?? string.Empty;
+    public string Id => Raw.Split('#').ElementAtOrDefault(1) ?? string.Empty;
+
+    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}" };
+
+    public override string ToString() => Raw;
+}