72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
from datetime import datetime
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from sqlalchemy import Table, Column, Integer, String, ForeignKey, DateTime, JSON as JSONType
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from sqlalchemy.orm import relationship
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from orm.base import Base
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import asyncio
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class TopicSubscription(Base):
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__tablename__ = "topic_subscription"
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id = None
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topic = Column(ForeignKey('topic.slug'), primary_key = True)
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user = Column(ForeignKey('user.id'), primary_key = True)
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createdAt: str = Column(DateTime, nullable=False, default = datetime.now, comment="Created at")
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class Topic(Base):
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__tablename__ = 'topic'
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id = None
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slug: str = Column(String, primary_key = True)
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title: str = Column(String, nullable=False, comment="Title")
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body: str = Column(String, nullable=True, comment="Body")
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pic: str = Column(String, nullable=True, comment="Picture")
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children = Column(JSONType, nullable=True, comment="list of children topics")
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community = Column(ForeignKey("community.slug"), nullable=False, comment="Community")
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class TopicStorage:
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topics = {}
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lock = asyncio.Lock()
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@staticmethod
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def init(session):
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self = TopicStorage
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topics = session.query(Topic)
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self.topics = dict([(topic.slug, topic) for topic in topics])
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for topic in self.topics.values():
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self.load_parents(topic)
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@staticmethod
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def load_parents(topic):
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self = TopicStorage
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parents = []
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for parent in self.topics.values():
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if topic.slug in parent.children:
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parents.append(parent.slug)
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topic.parents = parents
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return topic
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@staticmethod
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async def get_topics(slugs):
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self = TopicStorage
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async with self.lock:
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if not slugs:
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return self.topics.values()
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topics = filter(lambda topic: topic.slug in slugs, self.topics.values())
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return list(topics)
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@staticmethod
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async def get_topics_by_community(community):
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self = TopicStorage
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async with self.lock:
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topics = filter(lambda topic: topic.community == community, self.topics.values())
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return list(topics)
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@staticmethod
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async def add_topic(topic):
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self = TopicStorage
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async with self.lock:
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self.topics[topic.slug] = topic
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self.load_parents(topic)
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