Speeding up visible location call

microservices/InventoryApi/Controllers/InventoryController.cs

@@ -17,6 +17,37 @@ public class InventoryController : ControllerBase
         _inventory = inventory;
     }
 
+    [HttpPost("internal/by-owner/{ownerType}")]
+    public async Task<IActionResult> GetByOwnersInternal(string ownerType, [FromBody] InternalOwnerInventoryBatchRequest req)
+    {
+        var configuredKey = (HttpContext.RequestServices.GetRequiredService<IConfiguration>()["InternalApi:Key"]
+            ?? HttpContext.RequestServices.GetRequiredService<IConfiguration>()["Jwt:Key"]
+            ?? string.Empty).Trim();
+        var requestKey = (Request.Headers["X-Internal-Api-Key"].FirstOrDefault() ?? string.Empty).Trim();
+        if (string.IsNullOrWhiteSpace(configuredKey) || !string.Equals(configuredKey, requestKey, StringComparison.Ordinal))
+            return Unauthorized();
+
+        var normalizedOwnerType = ownerType.Trim().ToLowerInvariant();
+        if (normalizedOwnerType is not ("character" or "location"))
+            return BadRequest("Unsupported ownerType");
+
+        var groupedItems = await _inventory.GetByOwnersAsync(normalizedOwnerType, req.OwnerIds);
+        var ownerIds = req.OwnerIds
+            .Where(id => !string.IsNullOrWhiteSpace(id))
+            .Select(id => id.Trim())
+            .Distinct(StringComparer.Ordinal)
+            .ToList();
+
+        var response = ownerIds.Select(ownerId => new OwnerInventorySummaryResponse
+        {
+            OwnerType = normalizedOwnerType,
+            OwnerId = ownerId,
+            Items = groupedItems.GetValueOrDefault(ownerId, []).Select(InventoryItemResponse.FromModel).ToList()
+        }).ToList();
+
+        return Ok(response);
+    }
+
     [HttpGet("item-definitions")]
     [Authorize(Roles = "USER,SUPER")]
     public async Task<IActionResult> ListItemDefinitions()