feat: add support for festive weapon variants

on schema update, festive variants are linked. on content injection, if if finds a festive variant, it adds price rows for Festive and Strange Festive.

src/content/schemaService.ts

@@ -38,6 +38,7 @@ export class ItemSchema {
 		slot: ItemSlot,
 		tradable: Boolean,
 		hasAustraliumVariant: Boolean,
+		festiveVariant: number | null
 		canKillstreakify: Boolean
 	};
 }
@@ -70,6 +71,25 @@ export function getTradableStatusByName(schema: ItemSchema, name: string, exclud
 	return true
 }
 
+export function linkFestiveVariants(items: Array<{item_class: string, defindex: number, item_name: string}>, schema: ItemSchema): void {
+	if(!schema) return
+	items.filter(item =>
+			item.item_class != null &&
+			item.item_class.startsWith('tf_weapon') &&
+			item.item_name.startsWith('Festive ')
+	).forEach(festive => {
+			const originalName = festive.item_name.slice(8); // "Festive " is 8 chars
+			const original = items.find(item => item.item_name === originalName && item.defindex > 30 && (item.defindex < 15000 || item.defindex >= 16000));
+
+			if (original) {
+				if(schema[original.defindex]) {
+					schema[original.defindex].festiveVariant = festive.defindex;
+					console.log(`original:${original.defindex},festive:${festive.defindex}`);
+				}
+			}
+	});
+}
+
 export async function wipeSchema(): Promise<void> {
 	await setStorageValue(storage_version, __VERSION__)
 	await setStorageValue(storage_schema, null)
@@ -149,6 +169,8 @@ export async function prepareSchema(): Promise<ItemSchema> {
 				}
 			});
 
+			linkFestiveVariants(responseItems, cacheItems)
+
 			await setStorageValue(storage_schema, (cacheItems));
 			itemSchema = cacheItems
 			await setStorageValue(storage_version, __VERSION__);