전체적인 리팩토링

app/api/kis/indices/route.ts

@@ -0,0 +1,64 @@
+/**
+ * @file app/api/kis/indices/route.ts
+ * @description 국내 KOSPI/KOSDAQ 지수 조회 API
+ *
+ * @description [주요 책임]
+ * - 로그인 및 KIS API 설정 여부 확인
+ * - `getDomesticDashboardIndices` 함수를 호출하여 지수 데이터를 조회
+ * - 조회된 데이터를 클라이언트에 JSON 형식으로 반환
+ */
+import { NextResponse } from "next/server";
+import { hasKisConfig } from "@/lib/kis/config";
+import { getDomesticDashboardIndices } from "@/lib/kis/dashboard";
+import { hasKisApiSession } from "@/app/api/kis/_session";
+import {
+  createKisApiErrorResponse,
+  KIS_API_ERROR_CODE,
+  toKisApiErrorMessage,
+} from "@/app/api/kis/_response";
+import { readKisCredentialsFromHeaders } from "@/app/api/kis/domestic/_shared";
+
+export async function GET(request: Request) {
+  const hasSession = await hasKisApiSession();
+  if (!hasSession) {
+    return createKisApiErrorResponse({
+      status: 401,
+      code: KIS_API_ERROR_CODE.AUTH_REQUIRED,
+      message: "로그인이 필요합니다.",
+    });
+  }
+
+  const credentials = readKisCredentialsFromHeaders(request.headers);
+
+  if (!hasKisConfig(credentials)) {
+    return createKisApiErrorResponse({
+      status: 400,
+      code: KIS_API_ERROR_CODE.CREDENTIAL_REQUIRED,
+      message: "KIS API 키 설정이 필요합니다.",
+    });
+  }
+
+  try {
+    const indices = await getDomesticDashboardIndices(credentials);
+    return NextResponse.json(
+      {
+        indices,
+        fetchedAt: new Date().toISOString(),
+      },
+      {
+        headers: {
+          "cache-control": "no-store",
+        },
+      },
+    );
+  } catch (error) {
+    return createKisApiErrorResponse({
+      status: 500,
+      code: KIS_API_ERROR_CODE.UPSTREAM_FAILURE,
+      message: toKisApiErrorMessage(
+        error,
+        "지수 조회 중 오류가 발생했습니다.",
+      ),
+    });
+  }
+}