more minor tweaks, benefit from get_files

my/lastfm/__init__.py

@@ -2,27 +2,31 @@
 Last.fm scrobbles
 '''
 
-from .. import init
 
-from functools import lru_cache
-from typing import NamedTuple, Dict, Any
+from ..common import get_files, mcachew, Json
+
 from datetime import datetime
-from pathlib import Path
 import json
+from pathlib import Path
+from typing import NamedTuple, Any, Sequence, Iterable
 
 import pytz
 
 from my.config import lastfm as config
 
-# TODO Json type?
 # TODO memoised properties?
 # TODO lazy mode and eager mode?
 # lazy is a bit nicer in terms of more flexibility and less processing?
 # eager is a bit more explicit for error handling
 
-class Scrobble(NamedTuple):
-    raw: Dict[str, Any]
+def inputs() -> Sequence[Path]:
+    return get_files(config.export_path)
 
+
+class Scrobble(NamedTuple):
+    raw: Json
+
+    # TODO mm, no timezone? hopefuly it's UTC
     @property
     def dt(self) -> datetime:
         ts = int(self.raw['date'])
@@ -45,22 +49,10 @@ class Scrobble(NamedTuple):
     # TODO could also be nice to make generic? maybe even depending on eagerness
 
 
-# TODO memoise...?
-# TODO watch out, if we keep the app running it might expire
-def _iter_scrobbles():
-    # TODO use get_files
-    last = max(Path(config.export_path).glob('*.json'))
-    # TODO mm, no timezone? hopefuly it's UTC
+@mcachew(hashf=lambda: inputs())
+def scrobbles() -> Iterable[Scrobble]:
+    last = max(inputs())
     j = json.loads(last.read_text())
 
     for raw in j:
         yield Scrobble(raw=raw)
-
-
-@lru_cache(1)
-def get_scrobbles():
-    return list(sorted(_iter_scrobbles(), key=lambda s: s.dt))
-
-
-def test():
-    assert len(get_scrobbles()) > 1000

my/lastfm/fill_influxdb.py

@@ -1,11 +1,11 @@
 #!/usr/bin/env python3
 # pip install influxdb
 from influxdb import InfluxDBClient # type: ignore
-from my.lastfm import get_scrobbles
+from my.lastfm import scrobbles
 
 
-def main():
-    scrobbles = get_scrobbles()
+def main() -> None:
+    scrobbles = scrobbles()
     client = InfluxDBClient()
     # TODO client.create_database('lastfm')