Speeding up visible location call

microservices/InventoryApi/Services/InventoryStore.cs

@@ -88,6 +88,32 @@ public class InventoryStore
             .ThenBy(i => i.ItemKey)
             .ToListAsync();
 
+    public async Task<Dictionary<string, List<InventoryItem>>> GetByOwnersAsync(string ownerType, IEnumerable<string> ownerIds)
+    {
+        var normalizedOwnerType = NormalizeOwnerType(ownerType);
+        if (normalizedOwnerType is null)
+            return [];
+
+        var ids = ownerIds
+            .Where(id => !string.IsNullOrWhiteSpace(id))
+            .Select(id => id.Trim())
+            .Distinct(StringComparer.Ordinal)
+            .ToList();
+        if (ids.Count == 0)
+            return [];
+
+        var items = await _items.Find(i => i.OwnerType == normalizedOwnerType && ids.Contains(i.OwnerId))
+            .SortBy(i => i.OwnerId)
+            .ThenBy(i => i.EquippedSlot)
+            .ThenBy(i => i.Slot)
+            .ThenBy(i => i.ItemKey)
+            .ToListAsync();
+
+        return items
+            .GroupBy(item => item.OwnerId, StringComparer.Ordinal)
+            .ToDictionary(group => group.Key, group => group.ToList(), StringComparer.Ordinal);
+    }
+
     public Task<List<ItemDefinition>> ListItemDefinitionsAsync() =>
         _definitions.Find(Builders<ItemDefinition>.Filter.Empty).SortBy(d => d.ItemKey).ToListAsync();