Basic push notification system for service alerts

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

1 files changed, 40 insertions, 0 deletions

diff --git a/src/Enmarcha.Backend/Controllers/AlertsController.cs b/src/Enmarcha.Backend/Controllers/AlertsController.cs
new file mode 100644
index 0000000..4860399
--- /dev/null
+++ b/src/Enmarcha.Backend/Controllers/AlertsController.cs
@@ -0,0 +1,40 @@
+using Enmarcha.Backend.Data;
+using Enmarcha.Backend.Data.Models;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace Enmarcha.Backend.Controllers;
+
+[Route("api/alerts")]
+[ApiController]
+public class AlertsController(AppDbContext db) : ControllerBase
+{
+    /// <summary>
+    /// Returns all service alerts that are currently published and not yet hidden.
+    /// Includes PreNotice, Active, and Finished phases.
+    /// </summary>
+    [HttpGet]
+    public async Task<IActionResult> GetAlerts()
+    {
+        var now = DateTime.UtcNow;
+        var alerts = await db.ServiceAlerts
+            .Where(a => a.PublishDate <= now && a.HiddenDate > now)
+            .OrderByDescending(a => a.EventStartDate)
+            .ToListAsync();
+
+        return Ok(alerts.Select(a => new
+        {
+            id = a.Id,
+            version = a.Version,
+            phase = a.GetPhase(now).ToString(),
+            cause = a.Cause.ToString(),
+            effect = a.Effect.ToString(),
+            header = (Dictionary<string, string>)a.Header,
+            description = (Dictionary<string, string>)a.Description,
+            selectors = a.Selectors.Select(s => s.Raw).ToList(),
+            infoUrls = a.InfoUrls,
+            eventStartDate = a.EventStartDate,
+            eventEndDate = a.EventEndDate,
+        }));
+    }
+}