commit b8d00d7352a59ab97b0f5905118e6ef7ab2a36ce · edavis.dev/bsky-tools

+1 -1

feed_manager.py

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       feed_manager = FeedManager()

     

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       feed_manager.register(RapidFireFeed)

     

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       # feed_manager.register(PopularFeed)

     

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       feed_manager.register(PopularFeed)

     

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       feed_manager.register(HomeRunsTeamFeed)

     

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       feed_manager.register(NoraZoneInteresting)

     

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       feed_manager.register(SevenDirtyWordsFeed)

+32 -64

feeds/popular.py

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           FEED_URI = 'at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/popular'

     

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           def __init__(self):

     

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

     

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               # use the posts from the most-liked feed for this

     

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

     

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               self.db_cnx.pragma('foreign_keys', True)

     

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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 (uri text, create_ts timestamp, update_ts timestamp, temperature int);

     

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

     

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                   """)

     

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

     

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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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               if record is None:

     

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                   return

     

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

     

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

     

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               self.transaction_begin(self.db_cnx)

     

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               pass

     

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               self.db_cnx.execute("""

     

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               insert into posts (uri, create_ts, update_ts, temperature)

     

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               values (:uri, :ts, :ts, 1)

     

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               on conflict (uri) do update set temperature = temperature + 1, update_ts = :ts

     

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

     

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           def commit_changes(self):

     

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               pass

     

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           def delete_old_posts(self):

     

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               self.db_cnx.execute("""

     

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               delete from posts

     

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

     

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               bindings = []

     

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               sql = """

     

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               select posts.uri, create_ts, likes, lang, unixepoch('now') - create_ts as age_seconds,

     

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               exp( -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 ) ) as decay,

     

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               likes * exp( -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 ) ) as score

     

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               from posts

     

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               left join langs on posts.uri = langs.uri

     

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               where

     

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                   temperature * exp( -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 ) ) < 1.0

     

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                   and create_ts < unixepoch('now', '-15 minutes')

     

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               """)

     

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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.delete_old_posts()

     

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               self.logger.debug('committing changes')

     

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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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               """

     

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               if not '*' in langs:

     

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                   lang_values = list(langs.values())

     

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                   bindings.extend(lang_values)

     

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                   sql += " OR ".join(['lang = ?'] * len(lang_values))

     

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               else:

     

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                   sql += " 1=1 "

     

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               sql += """

     

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               order by score desc

     

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               limit ? offset ?

     

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               """

     

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               bindings.extend([limit, offset])

     

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               return sql, bindings

     

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

     

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               cur = self.db_cnx.execute("""

     

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               select uri from posts

     

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               order by temperature * exp( -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 ) )

     

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               desc limit :limit offset :offset

     

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               """, dict(limit=limit, offset=offset))

     

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               return [uri for (uri,) in cur]

     

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               sql, bindings = self.generate_sql(limit, offset, langs)

     

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               cur = self.db_cnx.execute(sql, bindings)

     

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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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               query = """

     

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               select

     

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                   uri, temperature,

     

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                   unixepoch('now') - create_ts as age_seconds,

     

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                   exp(

     

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                     -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 )

     

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                   ) as decay,

     

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                   temperature * exp(

     

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                     -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 )

     

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                   ) as score

     

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               from posts

     

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               order by score desc

     

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               limit :limit offset :offset

     

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               """

     

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

     

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               sql, bindings = self.generate_sql(limit, offset, langs)

     

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               return apsw.ext.format_query_table(

     

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                   self.db_cnx, query, bindings,

     

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                   self.db_cnx, sql, bindings,

     

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                   string_sanitize=2, text_width=9999, use_unicode=True

     

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               )