이름 검색 로직 개선 및 뒤로가기로 검색 페이지로 돌아온 경우에 필터 및 검색 결과가 유지되도록 개선

src/lib/server/db/file.ts

@@ -553,7 +553,7 @@ export const searchFiles = async (
       : await baseQuery.execute();
   return files.map((file) => ({
     id: file.id,
-    parentId: file.parent_id ?? "root",
+    parentId: file.parent_id ?? ("root" as const),
     userId: file.user_id,
     path: file.path,
     mekVersion: file.master_encryption_key_version,

src/lib/utils/index.ts

@@ -1,4 +1,5 @@
 export * from "./concurrency";
 export * from "./format";
 export * from "./gotoStateful";
+export * from "./search";
 export * from "./sort";

src/lib/utils/search.ts

@@ -0,0 +1,28 @@
+import { disassemble, getChoseong } from "es-hangul";
+
+const normalize = (s: string) => {
+  return s.normalize("NFC").toLowerCase().replace(/\s/g, "");
+};
+
+const extractHangul = (s: string) => {
+  return s.replace(/[^가-힣ㄱ-ㅎㅏ-ㅣ]/g, "");
+};
+
+const hangulSearch = (original: string, query: string) => {
+  original = extractHangul(original);
+  query = extractHangul(query);
+  if (!original || !query) return false;
+
+  return (
+    disassemble(original).includes(disassemble(query)) ||
+    getChoseong(original).includes(getChoseong(query))
+  );
+};
+
+export const searchString = (original: string, query: string) => {
+  original = normalize(original);
+  query = normalize(query);
+  if (!original || !query) return false;
+
+  return original.includes(query) || hangulSearch(original, query);
+};