sync from local backup

currency/cache.py

@@ -0,0 +1,28 @@
+import json
+import hashlib
+from django.core.cache import caches
+
+_cache = caches['default']
+
+CACHE_TIMEOUT = 900
+
+
+def _make_cache_key(prefix, *args, **kwargs):
+    raw = json.dumps({'args': args, 'kwargs': kwargs}, sort_keys=True, default=str)
+    suffix = hashlib.md5(raw.encode('utf-8')).hexdigest()
+    return f'currency_{prefix}_{suffix}'
+
+
+def get_cached_data(prefix, *args, **kwargs):
+    cache_key = _make_cache_key(prefix, *args, **kwargs)
+    return _cache.get(cache_key)
+
+
+def set_cached_data(prefix, data, *args, timeout=CACHE_TIMEOUT, **kwargs):
+    cache_key = _make_cache_key(prefix, *args, **kwargs)
+    _cache.set(cache_key, data, timeout=timeout)
+
+
+def delete_cached_data(prefix, *args, **kwargs):
+    cache_key = _make_cache_key(prefix, *args, **kwargs)
+    _cache.delete(cache_key)