修改交易记录问题

history_window_lib.py

@@ -0,0 +1,75 @@
+"""列表/导出用 UTC 时间窗（Gate / Binance 主站共用）。"""
+
+from datetime import datetime, timedelta, timezone
+
+PRESET_UTC_TODAY = "utc_today"
+PRESET_UTC_LAST24H = "utc_last24h"
+PRESET_UTC_LAST7D = "utc_last7d"
+PRESET_CUSTOM = "custom"
+
+
+def utc_now():
+    return datetime.now(timezone.utc)
+
+
+def utc_today_bounds(now=None):
+    now = now or utc_now()
+    start = now.replace(hour=0, minute=0, second=0, microsecond=0)
+    return start, now
+
+
+def resolve_window(query_mapping, default_preset=PRESET_UTC_TODAY):
+    """
+    从 ?win_preset= & from_utc= & to_utc= 解析窗口。
+    返回 dict: preset, start_utc, end_utc, label, start_ms, end_ms
+    """
+    preset = (query_mapping.get("win_preset") or default_preset or PRESET_UTC_TODAY).strip().lower()
+    now = utc_now()
+
+    if preset == PRESET_UTC_LAST24H:
+        start = now - timedelta(hours=24)
+        end = now
+        label = "近24小时(UTC)"
+    elif preset == PRESET_UTC_LAST7D:
+        start = now - timedelta(days=7)
+        end = now
+        label = "近7天(UTC)"
+    elif preset == PRESET_CUSTOM:
+        start = _parse_utc_input(query_mapping.get("from_utc")) or utc_today_bounds(now)[0]
+        end = _parse_utc_input(query_mapping.get("to_utc")) or now
+        if end < start:
+            start, end = end, start
+        label = f"{start.strftime('%Y-%m-%d %H:%M')} ~ {end.strftime('%Y-%m-%d %H:%M')} UTC"
+    else:
+        start, end = utc_today_bounds(now)
+        preset = PRESET_UTC_TODAY
+        label = f"UTC当日 {start.strftime('%Y-%m-%d')}"
+
+    return {
+        "preset": preset,
+        "start_utc": start,
+        "end_utc": end,
+        "label": label,
+        "start_ms": int(start.timestamp() * 1000),
+        "end_ms": int(end.timestamp() * 1000),
+    }
+
+
+def _parse_utc_input(raw):
+    s = (raw or "").strip().replace("T", " ").replace("Z", "").strip()
+    if not s:
+        return None
+    for fmt, n in (("%Y-%m-%d %H:%M:%S", 19), ("%Y-%m-%d %H:%M", 16), ("%Y-%m-%d", 10)):
+        try:
+            dt = datetime.strptime(s[:n], fmt)
+            return dt.replace(tzinfo=timezone.utc)
+        except Exception:
+            continue
+    return None
+
+
+def utc_window_to_bj_sql_strings(start_utc, end_utc, app_tz):
+    """DB 存北京时间字符串时，用于 SQLite 字符串范围比较。"""
+    start_bj = start_utc.astimezone(app_tz).strftime("%Y-%m-%d %H:%M:%S")
+    end_bj = end_utc.astimezone(app_tz).strftime("%Y-%m-%d %H:%M:%S")
+    return start_bj, end_bj