Update lastfm order/tests/docs

doc/MODULES.org

@@ -32,6 +32,7 @@ modules = [
     ('reddit' , 'my.reddit'              ),
     ('twint'  , 'my.twitter.twint'       ),
     ('twitter', 'my.twitter.archive'     ),
+    ('lastfm' , 'my.lastfm'              ),
 ]
 
 def indent(s, spaces=4):
@@ -105,4 +106,15 @@ for cls, p in modules:
     class twitter:
         export_path: Paths # path[s]/glob to the twitter archive takeout
     #+end_src
+- [[file:../my/lastfm][my.lastfm]]
+
+    Last.fm scrobbles
+
+    #+begin_src python
+    class lastfm:
+        """
+        Uses [[https://github.com/karlicoss/lastfm-backup][lastfm-backup]] outputs
+        """
+        export_path: Paths
+    #+end_src
 :end:

my/lastfm/__init__.py

@@ -2,8 +2,21 @@
 Last.fm scrobbles
 '''
 
+from ..core.common import Paths
+from dataclasses import dataclass
+from my.config import lastfm as user_config
+
+@dataclass
+class lastfm(user_config):
+    """
+    Uses [[https://github.com/karlicoss/lastfm-backup][lastfm-backup]] outputs
+    """
+    export_path: Paths
+
+
+from ..core.cfg import make_config
+config = make_config(lastfm)
 
-from ..common import get_files, mcachew, Json
 
 from datetime import datetime
 import json
@@ -12,16 +25,17 @@ from typing import NamedTuple, Any, Sequence, Iterable
 
 import pytz
 
-from my.config import lastfm as config
+from ..core.common import mcachew, Json, get_files
+
+def inputs() -> Sequence[Path]:
+    return get_files(config.export_path)
+
 
 # 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
 
-def inputs() -> Sequence[Path]:
-    return get_files(config.export_path)
-
 
 class Scrobble(NamedTuple):
     raw: Json
@@ -54,5 +68,5 @@ def scrobbles() -> Iterable[Scrobble]:
     last = max(inputs())
     j = json.loads(last.read_text())
 
-    for raw in j:
+    for raw in reversed(j):
         yield Scrobble(raw=raw)

tests/lastfm.py

@@ -1,3 +1,7 @@
+from my.core.cachew import disable_cachew
+# TODO need something nicer and integrated inside cachew..
+disable_cachew()  # meh
+
 from more_itertools import ilen
 
 from my.lastfm import scrobbles
@@ -5,3 +9,9 @@ from my.lastfm import scrobbles
 
 def test():
     assert ilen(scrobbles()) > 1000
+
+
+def test_datetime_ascending():
+    from more_itertools import pairwise
+    for a, b in pairwise(scrobbles()):
+        assert a.dt <= b.dt