commit 782e3eb9f6780bfc12f4aa81db41bea17a70559b · edavis.dev/bsky-tools

+1 -1

feed_manager.py

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                   feed.commit_changes()

     

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       feed_manager = FeedManager()

     

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       # feed_manager.register(PopularFeed)

     

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       feed_manager.register(PopularFeed)

     

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       feed_manager.register(RapidFireFeed)

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feeds/popular.py

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       import logging

     

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       import os

     

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       import apsw

     

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       import apsw.ext

     

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       from . import BaseFeed

     

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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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               db_fname = ''

     

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               if os.path.isdir('/dev/shm/'):

     

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                   os.makedirs('/dev/shm/feedgens/', exist_ok=True)

     

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                   db_fname = '/dev/shm/feedgens/popular.db'

     

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               else:

     

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                   db_fname = 'db/popular.db'

     

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               super().__init__()

     

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               self.db_cnx = apsw.Connection(db_fname)

     

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

     

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

     

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               self.db_cnx.pragma('synchronous', 'OFF')

     

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

     

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               with self.db_cnx:

     
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               if collection != 'app.bsky.feed.like':

     

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                   return

     

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               ts = commit['time']

     

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               record = op['record']

     

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               if record is None:

     

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                   return

     

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               ts = self.safe_timestamp(record['createdAt']).timestamp()

     

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

     

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               with self.db_cnx:

     

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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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               self.transaction_begin(self.db_cnx)

     

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           def run_tasks_minute(self):

     

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               self.logger.debug('running minute tasks')

     

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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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               with self.db_cnx:

     

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                   self.db_cnx.execute(

     

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                       "delete from posts where temperature * exp( -1 * ( ( strftime( '%s', 'now' ) - strftime( '%s', create_ts ) ) / 1800.0 ) ) < 1.0 and strftime( '%s', create_ts ) < strftime( '%s', 'now', '-15 minutes' )"

     

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                   )

     

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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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               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.db_cnx.pragma('wal_checkpoint(TRUNCATE)')

     

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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((

     

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                   "select uri from posts "

     

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                   "order by temperature * exp( "

     

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                   "-1 * ( ( strftime( '%s', 'now' ) - strftime( '%s', 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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               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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           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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               return apsw.ext.format_query_table(

     

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                   self.db_cnx, query, bindings,

     

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                   string_sanitize=2, text_width=9999, use_unicode=True

     

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               )