commit 30dff5584db0231d9723af19b36f01bf3f6ded96 · edavis.dev/bsky-tools

+20 -23
feeds/popular.py
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       import os

     

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       import sys

     

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       import math

     

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       import sqlite3

     

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       import apsw

     

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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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                   self.db_cnx = sqlite3.connect('/dev/shm/feedgens/popular.db')

     

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

     

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               else:

     

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                   self.db_cnx = sqlite3.connect('db/popular.db')

     

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                   db_fname = 'db/popular.db'

     

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               self.db_cnx.create_function('exp', 1, math.exp)

     

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               self.db_cnx = apsw.Connection(db_fname)

     

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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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                   self.db_cnx.executescript(

     

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                       "pragma journal_mode = WAL;"

     

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                       "pragma synchronous = OFF;"

     

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                       "pragma wal_autocheckpoint = 0;"

     

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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.cleanup_checkpoint = 0

     

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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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           def process_commit(self, commit):

     

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               op = commit['op']

     
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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.cleanup_checkpoint += 1

     

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               if self.cleanup_checkpoint % 1000 == 0:

     

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                   sys.stdout.write('popular: running cleanup checkpoint\n')

     

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                   sys.stdout.flush()

     

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           def run_tasks_minute(self):

     

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               sys.stdout.write('popular: running minute tasks\n')

     

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               sys.stdout.flush()

     

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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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               with self.db_cnx:

     

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                   self.db_cnx.execute(

     

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                       "pragma wal_checkpoint(TRUNCATE)"

     

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

     

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

     

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               cur = self.db_cnx.execute((