Recognize imported furniture by normalized classname and local IDs

src/lib/furni/local-presence.test.ts

@@ -0,0 +1,55 @@
+import { describe, expect, it } from "vitest";
+import { indexLocalFurniture, localFurnitureStatus } from "./local-presence";
+
+const index = indexLocalFurniture([
+	{ id: 2000037258, itemName: "recycler_kintsugib" },
+]);
+describe("local furniture recognition", () => {
+	it("recognizes casing differences and uses the allocated catalog ID", () => {
+		expect(
+			localFurnitureStatus(
+				"recycler_kintsugiB",
+				index,
+				new Set(["recycler_kintsugib"]),
+				new Set([2000037258]),
+			),
+		).toEqual({
+			alreadyImported: true,
+			localId: 2000037258,
+			hasFurnidata: true,
+			hasCatalogEntry: true,
+		});
+	});
+	it("does not confuse the base furniture with its named variant", () => {
+		expect(
+			localFurnitureStatus(
+				"recycler_kintsugi",
+				index,
+				new Set(),
+				new Set([16940]),
+			).alreadyImported,
+		).toBe(false);
+	});
+	it("does not identify a source-ID collision as a matching catalog offer", () => {
+		expect(
+			localFurnitureStatus(
+				"recycler_kintsugiB",
+				index,
+				new Set(),
+				new Set([16940]),
+			).hasCatalogEntry,
+		).toBe(false);
+	});
+	it("retains separate color variants and duplicate SQL records", () => {
+		const rows = indexLocalFurniture([
+			{ id: 1, itemName: "chair*0" },
+			{ id: 2, itemName: "CHAIR*0" },
+			{ id: 3, itemName: "chair*1" },
+		]);
+		expect(rows.get("chair*0")).toHaveLength(2);
+		expect(rows.get("chair*1")).toHaveLength(1);
+		expect(
+			localFurnitureStatus("chair*0", rows, new Set(), new Set()).localId,
+		).toBeUndefined();
+	});
+});

src/lib/furni/local-presence.ts

@@ -0,0 +1,29 @@
+import { normalizeClassname } from "./classname";
+
+export function indexLocalFurniture<T extends { id: number; itemName: string }>(
+	rows: T[],
+) {
+	const index = new Map<string, T[]>();
+	for (const row of rows) {
+		const key = normalizeClassname(row.itemName);
+		const matches = index.get(key) ?? [];
+		matches.push(row);
+		index.set(key, matches);
+	}
+	return index;
+}
+export function localFurnitureStatus(
+	classname: string,
+	local: Map<string, Array<{ id: number; itemName: string }>>,
+	furnidata: Set<string>,
+	catalogIds: Set<number>,
+) {
+	const key = normalizeClassname(classname);
+	const rows = local.get(key) ?? [];
+	return {
+		alreadyImported: rows.length > 0,
+		localId: rows.length === 1 ? rows[0].id : undefined,
+		hasFurnidata: furnidata.has(key),
+		hasCatalogEntry: rows.some((row) => catalogIds.has(row.id)),
+	};
+}