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Add RatioFeed
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feed_manager.py
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feed_manager.py
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from feeds.homeruns import HomeRunsTeamFeed
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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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class FeedManager:
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def __init__(self):
···
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feed_manager.register(HomeRunsTeamFeed)
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feed_manager.register(NoraZoneInteresting)
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feed_manager.register(SevenDirtyWordsFeed)
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feed_manager.register(RatioFeed)
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feeds/ratio.py
+144
feeds/ratio.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 RatioFeed(BaseFeed):
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FEED_URI = 'at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/ratio'
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SERVE_FEED_QUERY = """
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with served as (
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select
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uri,
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create_ts,
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( unixepoch('now') - create_ts ) as age_seconds,
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replies,
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quoteposts,
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likes,
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reposts,
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( replies + quoteposts ) / ( likes + reposts ) as ratio,
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exp( -1 * ( ( unixepoch('now') - create_ts ) / ( 3600.0 * 16 ) ) ) as decay
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from posts
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)
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select
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*,
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( ratio * decay ) as score
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from served
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where replies > 15 and ratio > 2.5
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order by score desc
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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
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create_ts < unixepoch('now', '-5 days')
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"""
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def __init__(self):
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self.db_cnx = apsw.Connection('db/ratio.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,
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replies float, likes float, reposts float, quoteposts float
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);
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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.ratio')
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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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subject_uri = None
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is_reply = False
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is_quotepost = False
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if commit['collection'] in {'app.bsky.feed.like', 'app.bsky.feed.repost'}:
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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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subject_uri = record['subject']['uri']
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except KeyError:
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return
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elif commit['collection'] == 'app.bsky.feed.post':
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record = commit.get('record')
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ts = self.safe_timestamp(record.get('createdAt')).timestamp()
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if record.get('reply') is not None:
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is_reply = True
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try:
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subject_uri = record['reply']['parent']['uri']
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except KeyError:
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return
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# only count non-OP replies
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if subject_uri.startswith('at://' + commit['did']):
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return
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elif record.get('embed') is not None:
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is_quotepost = True
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t = record['embed']['$type']
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if t == 'app.bsky.embed.record':
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try:
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subject_uri = record['embed']['record']['uri']
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except KeyError:
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return
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elif t == 'app.bsky.embed.recordWithMedia':
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try:
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subject_uri = record['embed']['record']['record']['uri']
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except KeyError:
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return
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if subject_uri is None:
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return
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params = {
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'uri': subject_uri,
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'ts': ts,
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'is_reply': int(is_reply),
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'is_like': int(commit['collection'] == 'app.bsky.feed.like'),
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'is_repost': int(commit['collection'] == 'app.bsky.feed.repost'),
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'is_quotepost': int(is_quotepost),
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}
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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, replies, likes, reposts, quoteposts)
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values (:uri, :ts,
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case when :is_reply then 1 else 0 end,
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case when :is_like then 1 else 0 end,
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case when :is_repost then 1 else 0 end,
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case when :is_quotepost then 1 else 0 end)
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on conflict(uri)
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do update set
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replies = replies + case when :is_reply then 1 else 0 end,
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likes = likes + case when :is_like then 1 else 0 end,
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reposts = reposts + case when :is_repost then 1 else 0 end,
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quoteposts = quoteposts + case when :is_quotepost then 1 else 0 end
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""", params)
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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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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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)