Merge remote-tracking branch 'rd/master'

reddit/__init__.py

@@ -0,0 +1,278 @@
+#!/usr/bin/env python3
+from typing import List, Dict, Union, Iterable, Iterator, NamedTuple, Any, Sequence
+import json
+from functools import lru_cache
+from collections import OrderedDict
+from pathlib import Path
+import pytz
+import re
+from datetime import datetime
+import logging
+from multiprocessing import Pool
+
+from kython import kompress, cproperty, make_dict, numbers
+from kython.klogging import setup_logzero
+
+# TODO hmm. apparently decompressing takes quite a bit of time...
+
+BPATH = Path("/L/backups/reddit")
+
+
+def get_logger():
+    return logging.getLogger('reddit-provider')
+
+def reddit(suffix: str) -> str:
+    return 'https://reddit.com' + suffix
+
+
+def _get_backups(all_=True) -> Sequence[Path]:
+    bfiles = tuple(sorted(BPATH.glob('reddit-*.json.xz'))) # TODO switch to that new compression format?
+    if all_:
+        return bfiles
+    else:
+        return bfiles[-1:]
+
+Sid = str
+
+class Save(NamedTuple):
+    created: datetime
+    backup_dt: datetime
+    title: str
+    sid: Sid
+    json: Any = None
+    # TODO ugh. not sure how to support this in cachew... could try serializing dicts of simple types automatically.. but json can't be properly typed
+    # TODO why would json be none?
+
+    def __hash__(self):
+        return hash(self.sid)
+
+    @cproperty
+    def save_dt(self) -> datetime:
+        # TODO not exactly precise... but whatever I guess
+        return self.backup_dt
+
+    @cproperty
+    def url(self) -> str:
+        # pylint: disable=unsubscriptable-object
+        pl = self.json['permalink']
+        return reddit(pl)
+
+    @cproperty
+    def text(self) -> str:
+        bb = self.json.get('body', None)
+        st = self.json.get('selftext', None)
+        if bb is not None and st is not None:
+            raise RuntimeError(f'wtf, both body and selftext are not None: {bb}; {st}')
+        return bb or st
+
+    @cproperty
+    def subreddit(self) -> str:
+        assert self.json is not None
+        # pylint: disable=unsubscriptable-object
+        return self.json['subreddit']['display_name']
+
+
+# class Misc(NamedTuple):
+#     pass
+
+# EventKind = Union[Save, Misc]
+
+EventKind = Save
+
+class Event(NamedTuple):
+    dt: datetime
+    text: str
+    kind: EventKind
+    eid: str
+    title: str
+    url: str
+
+    @property
+    def cmp_key(self):
+        return (self.dt, (1 if 'unfavorited' in self.text else 0))
+
+
+# TODO kython?
+def get_some(d, *keys):
+    # TODO only one should be non None??
+    for k in keys:
+        v = d.get(k, None)
+        if v is not None:
+            return v
+    else:
+        return None
+
+
+Url = str
+
+def _get_bdate(bfile: Path) -> datetime:
+    RE = re.compile(r'reddit-(\d{14})')
+    match = RE.search(bfile.stem)
+    assert match is not None
+    bdt = pytz.utc.localize(datetime.strptime(match.group(1), "%Y%m%d%H%M%S"))
+    return bdt
+
+
+def _get_state(bfile: Path) -> Dict[Sid, Save]:
+    logger = get_logger()
+    logger.debug('handling %s', bfile)
+
+    bdt = _get_bdate(bfile)
+
+    saves: List[Save] = []
+    with kompress.open(bfile) as fo:
+        jj = json.load(fo)
+
+    saved = jj['saved']
+    for s in saved:
+        created = pytz.utc.localize(datetime.utcfromtimestamp(s['created_utc']))
+        # TODO need permalink
+        # url = get_some(s, 'link_permalink', 'url') # this was original url...
+        title = get_some(s, 'link_title', 'title')
+        save = Save(
+            created=created,
+            backup_dt=bdt,
+            title=title,
+            sid=s['id'],
+            json=s,
+        )
+        saves.append(save)
+
+    return make_dict(
+        sorted(saves, key=lambda p: p.created),
+        key=lambda s: s.sid,
+    )
+    return OrderedDict()
+
+# from cachew import cachew
+# TODO hmm. how to combine cachew and lru_cache?....
+# @cachew('/L/data/.cache/reddit-events.cache')
+
+@lru_cache(1)
+def _get_events(backups: Sequence[Path], parallel: bool) -> List[Event]:
+    logger = get_logger()
+
+    events: List[Event] = []
+    prev_saves: Dict[Sid, Save] = {}
+    # TODO suppress first batch??
+    # TODO for initial batch, treat event time as creation time
+
+    states: Iterable[Dict[Sid, Save]]
+    if parallel:
+        with Pool() as p:
+            states = p.map(_get_state, backups)
+    else:
+        # also make it lazy...
+        states = map(_get_state, backups)
+
+    for i, bfile, saves in zip(numbers(), backups, states):
+        bdt = _get_bdate(bfile)
+
+        first = i == 0
+
+        for key in set(prev_saves.keys()).symmetric_difference(set(saves.keys())):
+            ps = prev_saves.get(key, None)
+            if ps is not None:
+                # TODO use backup date, that is more precise...
+                # eh. I guess just take max and it will always be correct?
+                assert not first
+                events.append(Event(
+                    dt=bdt, # TODO average wit ps.save_dt? 
+                    text=f"unfavorited",
+                    kind=ps,
+                    eid=f'unf-{ps.sid}',
+                    url=ps.url,
+                    title=ps.title,
+                ))
+            else: # in saves
+                s = saves[key]
+                events.append(Event(
+                    dt=s.created if first else s.save_dt,
+                    text=f"favorited{' [initial]' if first else ''}",
+                    kind=s,
+                    eid=f'fav-{s.sid}',
+                    url=s.url,
+                    title=s.title,
+                ))
+        prev_saves = saves
+
+    # TODO a bit awkward, favorited should compare lower than unfavorited?
+    return list(sorted(events, key=lambda e: e.cmp_key))
+
+def get_events(*args, all_=True, parallel=True):
+    backups = _get_backups(all_=all_)
+    assert len(backups) > 0
+    return _get_events(backups=backups, parallel=parallel)
+
+def get_saves(**kwargs) -> List[Save]:
+    logger = get_logger()
+
+    events = get_events(**kwargs)
+    saves: Dict[Sid, Save] = OrderedDict()
+    for e in events:
+        if e.text.startswith('favorited'):
+            ss = e.kind
+            assert isinstance(ss, Save)
+            if ss.sid in saves:
+                # apparently we can get duplicates if we saved/unsaved multiple times...
+                logger.warning(f'ignoring duplicate save %s, title %s, url %s', ss.sid, ss.title, ss.url)
+            else:
+                saves[ss.sid] = ss
+    assert len(saves) > 0
+
+    return list(saves.values())
+
+
+def test():
+    get_events(all_=False)
+    get_saves(all_=False)
+
+
+def test_unfav():
+    events = get_events(all_=True)
+    url = 'https://reddit.com/r/QuantifiedSelf/comments/acxy1v/personal_dashboard/'
+    uevents = [e for e in events if e.url == url]
+    assert len(uevents) == 2
+    ff = uevents[0]
+    assert ff.text == 'favorited'
+    uf = uevents[1]
+    assert uf.text == 'unfavorited'
+
+
+def test_get_all_saves():
+    saves = get_saves(all_=True)
+    # just check that they are unique..
+    make_dict(saves, key=lambda s: s.sid)
+
+
+def test_disappearing():
+    # eh. so for instance, 'metro line colors' is missing from reddit-20190402005024.json for no reason
+    # but I guess it was just a short glitch... so whatever
+    saves = get_events(all_=True)
+    favs = [s.kind for s in saves if s.text == 'favorited']
+    [deal_with_it] = [f for f in favs if f.title == '"Deal with it!"']
+    assert deal_with_it.backup_dt == datetime(2019, 4, 1, 23, 10, 25, tzinfo=pytz.utc)
+
+
+def test_unfavorite():
+    events = get_events(all_=True)
+    unfavs = [s for s in events if s.text == 'unfavorited']
+    [xxx] = [u for u in unfavs if u.eid == 'unf-19ifop']
+    assert xxx.dt == datetime(2019, 1, 28, 8, 10, 20, tzinfo=pytz.utc)
+
+
+def main():
+    setup_logzero(get_logger(), level=logging.DEBUG)
+    # TODO eh. not sure why but parallel on seems to mess glumov up and cause OOM...
+    events = get_events(parallel=False)
+    print(len(events))
+    for e in events:
+        print(e.text, e.url)
+    # for e in get_
+    # 509 with urls..
+    # for e in get_events():
+    #     print(e)
+
+
+if __name__ == '__main__':
+    main()