commit c439886a64d7fd304622f4c70c66732fe9c3baa7 · edavis.dev/bsky-tools

feed_manager.py

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       from feeds.norazone_interesting import NoraZoneInteresting

     

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       from feeds.sevendirtywords import SevenDirtyWordsFeed

     

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       from feeds.ratio import RatioFeed

     

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       from feeds.mostliked import MostLikedFeed

     

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       class FeedManager:

     

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           def __init__(self):

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feeds/mostliked.py

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       import logging

     

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       import apsw

     

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       import apsw.ext

     

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       from . import BaseFeed

     

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       class MostLikedFeed(BaseFeed):

     

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           FEED_URI = 'at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/most-liked'

     

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           SERVE_FEED_QUERY = """

     

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           select uri, create_ts, unixepoch('now', '-24 hours'), create_ts - unixepoch('now', '-24 hours'), likes

     

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           from posts

     

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           where create_ts >= unixepoch('now', '-24 hours')

     

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           order by likes desc, uri asc

     

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           limit :limit offset :offset

     

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           """

     

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           DELETE_OLD_POSTS_QUERY = """

     

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           delete from posts

     

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           where create_ts < unixepoch('now', '-24 hours')

     

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           """

     

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           def __init__(self):

     

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               self.db_cnx = apsw.Connection('db/mostliked.db')

     

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               self.db_cnx.pragma('journal_mode', 'WAL')

     

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               self.db_cnx.pragma('wal_autocheckpoint', '0')

     

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               with self.db_cnx:

     

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                   self.db_cnx.execute("""

     

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                   create table if not exists posts (

     

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                     uri text, create_ts timestamp, likes int

     

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                   );

     

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                   create unique index if not exists uri_idx on posts(uri);

     

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                   create index if not exists create_ts_idx on posts(create_ts);

     

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                   """)

     

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               self.logger = logging.getLogger('feeds.mostliked')

     

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           def process_commit(self, commit):

     

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               if commit['opType'] != 'c':

     

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                   return

     

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               if commit['collection'] != 'app.bsky.feed.like':

     

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                   return

     

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               record = commit.get('record')

     

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               ts = self.safe_timestamp(record.get('createdAt')).timestamp()

     

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               try:

     

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                   uri = record['subject']['uri']

     

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               except KeyError:

     

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                   return

     

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               self.transaction_begin(self.db_cnx)

     

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               self.db_cnx.execute("""

     

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               insert into posts (uri, create_ts, likes)

     

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               values (:uri, :ts, 1)

     

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               on conflict(uri)

     

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               do update set

     

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                 likes = likes + 1

     

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               """, dict(uri=uri, ts=ts))

     

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           def delete_old_posts(self):

     

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               self.db_cnx.execute(self.DELETE_OLD_POSTS_QUERY)

     

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               self.logger.debug('deleted {} old posts'.format(self.db_cnx.changes()))

     

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           def commit_changes(self):

     

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               self.logger.debug('committing changes')

     

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               self.delete_old_posts()

     

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               self.transaction_commit(self.db_cnx)

     

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               self.wal_checkpoint(self.db_cnx, 'RESTART')

     

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           def serve_feed(self, limit, offset, langs):

     

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               cur = self.db_cnx.execute(self.SERVE_FEED_QUERY, dict(limit=limit, offset=offset))

     

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               return [row[0] for row in cur]

     

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           def serve_feed_debug(self, limit, offset, langs):

     

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               bindings = dict(limit=limit, offset=offset)

     

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               return apsw.ext.format_query_table(

     

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                   self.db_cnx, self.SERVE_FEED_QUERY, bindings,

     

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                   string_sanitize=2, text_width=9999, use_unicode=True

     

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               )