128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
"""列表/导出用 UTC 时间窗（Gate / Binance 主站共用）。"""
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from datetime import datetime, timedelta, timezone
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PRESET_UTC_TODAY = "utc_today"
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PRESET_UTC_LAST24H = "utc_last24h"
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PRESET_UTC_LAST7D = "utc_last7d"
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PRESET_CUSTOM = "custom"
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def utc_now():
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return datetime.now(timezone.utc)
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def utc_today_bounds(now=None):
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now = now or utc_now()
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start = now.replace(hour=0, minute=0, second=0, microsecond=0)
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return start, now
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def resolve_window(query_mapping, default_preset=PRESET_UTC_TODAY):
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"""
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从 ?win_preset= & from_utc= & to_utc= 解析窗口。
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返回 dict: preset, start_utc, end_utc, label, start_ms, end_ms
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"""
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preset = (query_mapping.get("win_preset") or default_preset or PRESET_UTC_TODAY).strip().lower()
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now = utc_now()
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if preset == PRESET_UTC_LAST24H:
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start = now - timedelta(hours=24)
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end = now
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label = "近24小时(UTC)"
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elif preset == PRESET_UTC_LAST7D:
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start = now - timedelta(days=7)
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end = now
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label = "近7天(UTC)"
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elif preset == PRESET_CUSTOM:
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start = _parse_utc_input(query_mapping.get("from_utc")) or utc_today_bounds(now)[0]
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end = _parse_utc_input(query_mapping.get("to_utc")) or now
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if end < start:
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start, end = end, start
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label = f"{start.strftime('%Y-%m-%d %H:%M')} ~ {end.strftime('%Y-%m-%d %H:%M')} UTC"
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else:
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start, end = utc_today_bounds(now)
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preset = PRESET_UTC_TODAY
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label = f"UTC当日 {start.strftime('%Y-%m-%d')}"
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return {
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"preset": preset,
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"start_utc": start,
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"end_utc": end,
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"label": label,
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"start_ms": int(start.timestamp() * 1000),
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"end_ms": int(end.timestamp() * 1000),
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}
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def _parse_utc_input(raw):
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s = (raw or "").strip().replace("T", " ").replace("Z", "").strip()
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if not s:
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return None
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for fmt, n in (("%Y-%m-%d %H:%M:%S", 19), ("%Y-%m-%d %H:%M", 16), ("%Y-%m-%d", 10)):
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try:
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dt = datetime.strptime(s[:n], fmt)
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return dt.replace(tzinfo=timezone.utc)
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except Exception:
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continue
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return None
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def utc_window_to_bj_sql_strings(start_utc, end_utc, app_tz):
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"""DB 存北京时间字符串时，用于 SQLite 字符串范围比较。"""
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start_bj = start_utc.astimezone(app_tz).strftime("%Y-%m-%d %H:%M:%S")
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end_bj = end_utc.astimezone(app_tz).strftime("%Y-%m-%d %H:%M:%S")
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return start_bj, end_bj
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SESSION_KEY_LIST_WIN = "list_win_filter"
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def query_mapping_from_session(session_store):
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"""从 Flask session 恢复 win_preset / from_utc / to_utc。"""
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if not session_store:
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return {}
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block = session_store.get(SESSION_KEY_LIST_WIN)
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if not isinstance(block, dict):
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return {}
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preset = (block.get("preset") or "").strip()
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if not preset:
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return {}
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return {
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"win_preset": preset,
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"from_utc": (block.get("from_utc") or "").strip(),
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"to_utc": (block.get("to_utc") or "").strip(),
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}
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def resolve_list_window(query_mapping, session_store=None, default_preset=PRESET_UTC_TODAY):
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"""
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URL 带 win_preset 时解析并写入 session；无参数时用 session 中上次「应用」的预设。
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"""
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qm = query_mapping or {}
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preset_in_q = (qm.get("win_preset") or "").strip()
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if preset_in_q:
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win = resolve_window(qm, default_preset=default_preset)
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if session_store is not None:
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session_store[SESSION_KEY_LIST_WIN] = {
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"preset": win["preset"],
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"from_utc": (qm.get("from_utc") or "").strip(),
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"to_utc": (qm.get("to_utc") or "").strip(),
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}
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return win
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stored = query_mapping_from_session(session_store)
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if stored.get("win_preset"):
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return resolve_window(stored, default_preset=default_preset)
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return resolve_window(qm, default_preset=default_preset)
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def list_window_redirect_query(session_store):
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"""复盘/表单 POST 后重定向时附带列表筛选 query。"""
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from urllib.parse import urlencode
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stored = query_mapping_from_session(session_store)
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if not stored.get("win_preset"):
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return ""
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params = {k: v for k, v in stored.items() if v}
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return urlencode(params)
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