108 lines
4.3 KiB
Python
108 lines
4.3 KiB
Python
import asyncio
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import json
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from typing import List
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from sqlalchemy import select
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from orm.author import Author
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from orm.topic import Topic
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from services.db import local_session
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from services.encoders import CustomJSONEncoder
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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": [{"id": 1, "name": "Дискурс", "slug": "discours", "pic": ""}],
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}
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# Кэширование данных темы
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async def cache_topic(topic: dict):
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payload = json.dumps(topic, cls=CustomJSONEncoder)
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# Одновременное кэширование по id и slug для быстрого доступа
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await asyncio.gather(
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redis.set(f"topic:id:{topic['id']}", payload), redis.set(f"topic:slug:{topic['slug']}", payload)
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)
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# Кэширование данных автора
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async def cache_author(author: dict):
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payload = json.dumps(author, cls=CustomJSONEncoder)
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# Кэширование данных автора по user и id
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await asyncio.gather(
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redis.set(f"author:user:{author['user'].strip()}", str(author["id"])),
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redis.set(f"author:id:{author['id']}", payload),
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)
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# Кэширование данных о подписках
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async def cache_follows(follower_id: int, entity_type: str, entity_id: int, is_insert=True):
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key = f"author:follows-{entity_type}s:{follower_id}"
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follows_str = await redis.get(key)
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follows = json.loads(follows_str) if follows_str else []
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if is_insert:
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if entity_id not in follows:
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follows.append(entity_id)
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else:
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follows = [eid for eid in follows if eid != entity_id]
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await redis.set(key, json.dumps(follows, cls=CustomJSONEncoder))
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update_follower_stat(follower_id, entity_type, len(follows))
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# Обновление статистики подписчика
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async def update_follower_stat(follower_id, entity_type, count):
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follower_key = f"author:id:{follower_id}"
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follower_str = await redis.get(follower_key)
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follower = json.loads(follower_str) if follower_str else None
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if follower:
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follower["stat"] = {f"{entity_type}s": count}
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await cache_author(follower)
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# Получение автора из кэша
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async def get_cached_author(author_id: int):
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author_key = f"author:id:{author_id}"
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result = await redis.get(author_key)
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if result:
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return json.loads(result)
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# Загрузка из базы данных, если не найдено в кэше
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with local_session() as session:
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author = session.execute(select(Author).where(Author.id == author_id)).scalar_one_or_none()
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if author:
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await cache_author(author.dict())
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return author.dict()
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return None
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# Получение темы по slug из кэша
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async def get_cached_topic_by_slug(slug: str):
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topic_key = f"topic:slug:{slug}"
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result = await redis.get(topic_key)
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if result:
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return json.loads(result)
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# Загрузка из базы данных, если не найдено в кэше
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with local_session() as session:
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topic = session.execute(select(Topic).where(Topic.slug == slug)).scalar_one_or_none()
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if topic:
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await cache_topic(topic.dict())
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return topic.dict()
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return None
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# Получение списка авторов по ID из кэша
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async def get_cached_authors_by_ids(author_ids: List[int]) -> List[dict]:
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# Одновременное получение данных всех авторов
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keys = [f"author:id:{author_id}" for author_id in author_ids]
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results = await asyncio.gather(*(redis.get(key) for key in keys))
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authors = [json.loads(result) if result else None for result in results]
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# Загрузка отсутствующих авторов из базы данных и кэширование
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missing_indices = [index for index, author in enumerate(authors) if author is None]
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if missing_indices:
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missing_ids = [author_ids[index] for index in missing_indices]
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with local_session() as session:
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query = select(Author).where(Author.id.in_(missing_ids))
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missing_authors = session.execute(query).scalars().all()
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await asyncio.gather(*(cache_author(author.dict()) for author in missing_authors))
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authors = [author.dict() for author in missing_authors]
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return authors
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