adminfront/devfront 세션 만료 관리 슬라이딩 갱신 로직 추가

devfront/src/lib/sessionSliding.ts

@@ -0,0 +1,45 @@
+export const SESSION_RENEW_THRESHOLD_MS = 5 * 60 * 1000;
+export const SESSION_RENEW_THROTTLE_MS = 30 * 1000;
+
+type SlidingSessionRenewDecisionParams = {
+  expiresAtSec?: number | null;
+  nowMs: number;
+  isEnabled: boolean;
+  isAuthenticated: boolean;
+  isLoading: boolean;
+  isRenewInFlight: boolean;
+  lastAttemptAtMs: number;
+  thresholdMs?: number;
+  throttleMs?: number;
+};
+
+export function shouldAttemptSlidingSessionRenew({
+  expiresAtSec,
+  nowMs,
+  isEnabled,
+  isAuthenticated,
+  isLoading,
+  isRenewInFlight,
+  lastAttemptAtMs,
+  thresholdMs = SESSION_RENEW_THRESHOLD_MS,
+  throttleMs = SESSION_RENEW_THROTTLE_MS,
+}: SlidingSessionRenewDecisionParams) {
+  if (!isEnabled || !isAuthenticated || isLoading || isRenewInFlight) {
+    return false;
+  }
+
+  if (typeof expiresAtSec !== "number") {
+    return false;
+  }
+
+  const remainingMs = expiresAtSec * 1000 - nowMs;
+  if (remainingMs <= 0 || remainingMs > thresholdMs) {
+    return false;
+  }
+
+  if (nowMs - lastAttemptAtMs < throttleMs) {
+    return false;
+  }
+
+  return true;
+}