Tracking character movement

microservices/LocationsApi/Controllers/LocationsController.cs

@@ -11,10 +11,12 @@ namespace LocationsApi.Controllers;
 public class LocationsController : ControllerBase
 {
     private readonly LocationStore _locations;
+    private readonly IConfiguration _cfg;
 
-    public LocationsController(LocationStore locations)
+    public LocationsController(LocationStore locations, IConfiguration cfg)
     {
         _locations = locations;
+        _cfg = cfg;
     }
 
     [HttpPost]
@@ -31,6 +33,7 @@ public class LocationsController : ControllerBase
         {
             Name = req.Name.Trim(),
             Coord = req.Coord,
+            CharacterIds = new List<string>(),
             CreatedUtc = DateTime.UtcNow
         };
 
@@ -85,4 +88,28 @@ public class LocationsController : ControllerBase
 
         return Ok("Updated");
     }
+
+    [HttpPost("presence")]
+    [AllowAnonymous]
+    public async Task<IActionResult> UpdatePresence([FromBody] UpdateLocationPresenceRequest req)
+    {
+        var internalKey = _cfg["Internal:Key"];
+        if (!string.IsNullOrWhiteSpace(internalKey))
+        {
+            if (!Request.Headers.TryGetValue("X-Internal-Key", out var provided) || provided != internalKey)
+                return Unauthorized();
+        }
+
+        if (string.IsNullOrWhiteSpace(req.CharacterId))
+            return BadRequest("CharacterId required");
+
+        if (req.Coord is null)
+            return BadRequest("Coord required");
+
+        var updated = await _locations.UpdatePresenceAsync(req.CharacterId.Trim(), req.Coord);
+        if (!updated)
+            return NotFound("Location not found");
+
+        return Ok("Updated");
+    }
 }