update

backend/api/utils/gold_time.py

@@ -0,0 +1,18 @@
+"""每个半小时刻度提前5分钟采集，返回值标记对应的半小时刻度。"""
+
+import time
+
+HALF_HOUR_SECONDS = 30 * 60
+UPDATE_LEAD_SECONDS = 5 * 60
+
+
+def half_hour_start(timestamp: float | None = None) -> int:
+    if timestamp is None:
+        timestamp = time.time()
+    return int(timestamp) // HALF_HOUR_SECONDS * HALF_HOUR_SECONDS
+
+
+def refresh_slot(timestamp: float | None = None) -> int:
+    if timestamp is None:
+        timestamp = time.time()
+    return half_hour_start(timestamp + UPDATE_LEAD_SECONDS)