update topics logix

resolvers/topics.py

@@ -0,0 +1,45 @@
+from orm import Topic, TopicSubscription
+from orm.base import local_session
+from resolvers.base import mutation, query, subscription
+from auth.authenticate import login_required
+import asyncio
+
+@query.field("topicsBySlugs")
+async def topics_by_slugs(_, info, slugs):
+	topics = []
+	with local_session() as session:
+		topics = session.query(Topic).filter(Topic.slug in slugs)
+	return topics
+
+@query.field("topicsByCommunity")
+async def topics_by_community(_, info, community):
+	topics = []
+	with local_session() as session:
+		topics = session.query(Topic).filter(Topic.community == community)
+	return topics
+
+@query.field("topicsByAuthor")
+async def topics_by_author(_, info, author):
+	topics = []
+	with local_session() as session:
+		topics = session.query(Topic).filter(Topic.community == community)
+		return topics
+
+@mutation.field("topicSubscribe")
+@login_required
+async def topic_subscribe(_, info, slug):
+	auth = info.context["request"].auth
+	user_id = auth.user_id
+	sub = TopicSubscription.create({ user: user_id, topic: slug })
+	return {} # type Result
+
+@mutation.field("topicUnsubscribe")
+@login_required
+async def topic_unsubscribe(_, info, slug):
+	auth = info.context["request"].auth
+	user_id = auth.user_id
+	sub = session.query(TopicSubscription).filter(TopicSubscription.user == user_id and TopicSubscription.topic == slug).first()
+	with local_session() as session:
+		session.delete(sub)
+		return {} # type Result
+	return { "error": "session error" }