126 lines
4.0 KiB
Python
126 lines
4.0 KiB
Python
import asyncio
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from sqlalchemy import select, event
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import json
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from orm.author import Author, AuthorFollower
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from orm.topic import Topic, TopicFollower
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from resolvers.stat import get_authors_with_stat, get_topics_with_stat
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from services.rediscache import redis
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DEFAULT_FOLLOWS = {
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'topics': [],
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'authors': [],
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'communities': [{'slug': 'discours', 'name': 'Дискурс', 'id': 1, 'pic': ''}],
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}
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async def update_author(author: Author, ttl=25 * 60 * 60):
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payload = json.dumps(author.dict())
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redis_key = f'user:{author.user}:author'
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await redis.execute('SETEX', redis_key, ttl, payload)
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redis_key = f'author:{author.id}:author'
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await redis.execute('SETEX', redis_key, ttl, payload)
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@event.listens_for(Author, 'after_insert')
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@event.listens_for(Author, 'after_update')
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def after_author_update(mapper, connection, author: Author):
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asyncio.create_task(update_author(author))
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@event.listens_for(TopicFollower, 'after_insert')
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def after_topic_follower_insert(mapper, connection, target: TopicFollower):
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asyncio.create_task(
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handle_topic_follower_change(connection, target.topic, target.follower, True)
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)
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@event.listens_for(TopicFollower, 'after_delete')
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def after_topic_follower_delete(mapper, connection, target: TopicFollower):
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asyncio.create_task(
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handle_topic_follower_change(connection, target.topic, target.follower, False)
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)
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@event.listens_for(AuthorFollower, 'after_insert')
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def after_author_follower_insert(mapper, connection, target: AuthorFollower):
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asyncio.create_task(
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handle_author_follower_change(connection, target.author, target.follower, True)
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)
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@event.listens_for(AuthorFollower, 'after_delete')
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def after_author_follower_delete(mapper, connection, target: AuthorFollower):
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asyncio.create_task(
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handle_author_follower_change(connection, target.author, target.follower, False)
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)
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async def update_follows_for_user(
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connection, user_id, entity_type, entity: dict, is_insert
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):
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redis_key = f'user:{user_id}:follows'
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follows_str = await redis.get(redis_key)
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if follows_str:
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follows = json.loads(follows_str)
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else:
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follows = DEFAULT_FOLLOWS
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if is_insert:
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follows[f'{entity_type}s'].append(entity)
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else:
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# Remove the entity from follows
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follows[f'{entity_type}s'] = [
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e for e in follows[f'{entity_type}s'] if e['id'] != entity['id']
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]
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await redis.execute('SET', redis_key, json.dumps(follows))
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async def handle_author_follower_change(connection, author_id: int, follower_id: int, is_insert: bool):
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q = select(Author).filter(Author.id == author_id)
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authors = get_authors_with_stat(q)
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author = authors[0]
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async with connection.begin() as conn:
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follower = await conn.execute(
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select(Author).filter(Author.id == follower_id)
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).first()
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if follower and author:
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await update_follows_for_user(
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conn,
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follower.user,
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'author',
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{
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'id': author.id,
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'name': author.name,
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'slug': author.slug,
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'pic': author.pic,
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'bio': author.bio,
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'stat': author.stat,
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},
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is_insert,
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)
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async def handle_topic_follower_change(connection, topic_id: int, follower_id: int, is_insert: bool):
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q = select(Topic).filter(Topic.id == topic_id)
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topics = get_topics_with_stat(q)
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topic = topics[0]
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async with connection.begin() as conn:
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follower = conn.execute(select(Author).filter(Author.id == follower_id)).first()
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if follower and topic:
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await update_follows_for_user(
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conn,
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follower.user,
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'topic',
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{
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'id': topic.id,
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'title': topic.title,
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'slug': topic.slug,
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'body': topic.body,
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'stat': topic.stat,
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},
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is_insert,
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)
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