Add provisions for generic item filters

SabreTools.Filter/FilterParser.cs

@@ -45,6 +45,8 @@ namespace SabreTools.Filter
                 "set" => ParseMachineFilterId(fieldName!),
 
                 // DatItem
+                "datitem" => ParseDatItemFilterId(fieldName!),
+                "item" => ParseDatItemFilterId(fieldName!),
                 _ => ParseDatItemFilterId(itemName, fieldName!),
             };
         }
@@ -87,6 +89,23 @@ namespace SabreTools.Filter
             return (MetadataFile.MachineKey, constantMatch);
         }
 
+        /// <summary>
+        /// Parse and validate item fields
+        /// </summary>
+        private static (string?, string?) ParseDatItemFilterId(string fieldName)
+        {
+            // Get all item types
+            var itemTypes = TypeHelper.GetDatItemTypeNames();
+
+            // If we get any matches
+            string? match = itemTypes.FirstOrDefault(t => t != null && ParseDatItemFilterId(t, fieldName) != (null, null));
+            if (match != null)
+                return ("item", ParseDatItemFilterId(match, fieldName).Item2);
+
+            // Nothing was found
+            return (null, null);
+        }
+
         /// <summary>
         /// Parse and validate item fields
         /// </summary>

SabreTools.Filter/FilterRunner.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using SabreTools.Models.Metadata;
 
 namespace SabreTools.Filter
@@ -57,7 +58,7 @@ namespace SabreTools.Filter
             foreach (var filter in this.Filters)
             {
                 // If the filter isn't for this object type, skip
-                if (filter.Key[0] != itemName)
+                if (filter.Key[0] != itemName || (filter.Key[0] == "item" && TypeHelper.GetDatItemTypeNames().Contains(itemName)))
                     continue;
 
                 // If we don't get a match, it's a failure

SabreTools.Filter/TypeHelper.cs

@@ -37,6 +37,18 @@ namespace SabreTools.Filter
 #endif
         }
 
+        /// <summary>
+        /// Attempt to get all DatItem types
+        /// </summary>
+        public static string?[] GetDatItemTypeNames()
+        {
+            return AppDomain.CurrentDomain.GetAssemblies()
+                .SelectMany(a => a.GetTypes())
+                .Where(t => typeof(DatItem).IsAssignableFrom(t) && t.IsClass)
+                .Select(GetXmlRootAttributeElementName)
+                .ToArray();
+        }
+
         /// <summary>
         /// Attempt to get the DatItem type from the name
         /// </summary>