Edward Betts
6b044b9493
Cache reads now accept an optional ttl (seconds). get_cached checks the file mtime and returns None if the entry is older than the TTL, triggering a fresh fetch. Eurostar prices use a 24-hour TTL; timetable caches remain indefinite (date-scoped keys become irrelevant once the date passes). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
27 lines
760 B
Python
27 lines
760 B
Python
import json
|
|
import os
|
|
import time
|
|
|
|
CACHE_DIR = os.path.join(os.path.dirname(__file__), 'cache')
|
|
|
|
|
|
def _cache_path(key: str) -> str:
|
|
safe_key = key.replace('/', '_').replace(' ', '_')
|
|
return os.path.join(CACHE_DIR, f"{safe_key}.json")
|
|
|
|
|
|
def get_cached(key: str, ttl: int | None = None):
|
|
"""Return cached data, or None if missing or older than ttl seconds."""
|
|
path = _cache_path(key)
|
|
if not os.path.exists(path):
|
|
return None
|
|
if ttl is not None and time.time() - os.path.getmtime(path) > ttl:
|
|
return None
|
|
with open(path) as f:
|
|
return json.load(f)
|
|
|
|
|
|
def set_cached(key: str, data) -> None:
|
|
os.makedirs(CACHE_DIR, exist_ok=True)
|
|
with open(_cache_path(key), 'w') as f:
|
|
json.dump(data, f, indent=2)
|