169 lines
4.6 KiB
Python
169 lines
4.6 KiB
Python
from sqlalchemy import and_, select, distinct, func
|
|
from sqlalchemy.orm import aliased
|
|
|
|
from services.auth import login_required
|
|
from services.db import local_session
|
|
from services.schema import mutation, query
|
|
from orm.shout import ShoutTopic, ShoutAuthor
|
|
from orm.topic import Topic, TopicFollower
|
|
from orm.author import Author
|
|
|
|
|
|
async def followed_topics(follower_id):
|
|
q = select(Author)
|
|
q = add_topic_stat_columns(q)
|
|
q = q.join(TopicFollower, TopicFollower.author == Author.id).where(TopicFollower.follower == follower_id)
|
|
# Pass the query to the get_authors_from_query function and return the results
|
|
return get_topics_from_query(q)
|
|
|
|
|
|
def add_topic_stat_columns(q):
|
|
aliased_shout_author = aliased(ShoutAuthor)
|
|
aliased_topic_follower = aliased(TopicFollower)
|
|
|
|
q = (
|
|
q.outerjoin(ShoutTopic, Topic.id == ShoutTopic.topic)
|
|
.add_columns(func.count(distinct(ShoutTopic.shout)).label("shouts_stat"))
|
|
.outerjoin(aliased_shout_author, ShoutTopic.shout == aliased_shout_author.shout)
|
|
.add_columns(func.count(distinct(aliased_shout_author.user)).label("authors_stat"))
|
|
.outerjoin(aliased_topic_follower)
|
|
.add_columns(func.count(distinct(aliased_topic_follower.follower)).label("followers_stat"))
|
|
)
|
|
|
|
q = q.group_by(Topic.id)
|
|
|
|
return q
|
|
|
|
|
|
def add_stat(topic, stat_columns):
|
|
[shouts_stat, authors_stat, followers_stat] = stat_columns
|
|
topic.stat = {
|
|
"shouts": shouts_stat,
|
|
"authors": authors_stat,
|
|
"followers": followers_stat,
|
|
}
|
|
|
|
return topic
|
|
|
|
|
|
def get_topics_from_query(q):
|
|
topics = []
|
|
with local_session() as session:
|
|
for [topic, *stat_columns] in session.execute(q):
|
|
topic = add_stat(topic, stat_columns)
|
|
topics.append(topic)
|
|
|
|
return topics
|
|
|
|
|
|
def topics_followed_by(author_id):
|
|
q = select(Topic)
|
|
q = add_topic_stat_columns(q)
|
|
q = q.join(TopicFollower).where(TopicFollower.follower == author_id)
|
|
|
|
return get_topics_from_query(q)
|
|
|
|
|
|
@query.field("topicsAll")
|
|
async def topics_all(_, _info):
|
|
q = select(Topic)
|
|
q = add_topic_stat_columns(q)
|
|
|
|
return get_topics_from_query(q)
|
|
|
|
|
|
@query.field("topicsByCommunity")
|
|
async def topics_by_community(_, info, community):
|
|
q = select(Topic).where(Topic.community == community)
|
|
q = add_topic_stat_columns(q)
|
|
|
|
return get_topics_from_query(q)
|
|
|
|
|
|
@query.field("topicsByAuthor")
|
|
async def topics_by_author(_, _info, author_id):
|
|
q = select(Topic)
|
|
q = add_topic_stat_columns(q)
|
|
q = q.join(Author).where(Author.id == author_id)
|
|
|
|
return get_topics_from_query(q)
|
|
|
|
|
|
@query.field("getTopic")
|
|
async def get_topic(_, _info, slug):
|
|
q = select(Topic).where(Topic.slug == slug)
|
|
q = add_topic_stat_columns(q)
|
|
|
|
topics = get_topics_from_query(q)
|
|
return topics[0]
|
|
|
|
|
|
@mutation.field("createTopic")
|
|
@login_required
|
|
async def create_topic(_, _info, inp):
|
|
with local_session() as session:
|
|
# TODO: check user permissions to create topic for exact community
|
|
new_topic = Topic(**inp)
|
|
session.add(new_topic)
|
|
session.commit()
|
|
|
|
return {"topic": new_topic}
|
|
|
|
|
|
@login_required
|
|
async def update_topic(_, _info, inp):
|
|
slug = inp["slug"]
|
|
with local_session() as session:
|
|
topic = session.query(Topic).filter(Topic.slug == slug).first()
|
|
if not topic:
|
|
return {"error": "topic not found"}
|
|
else:
|
|
Topic.update(topic, inp)
|
|
session.add(topic)
|
|
session.commit()
|
|
|
|
return {"topic": topic}
|
|
|
|
|
|
def topic_follow(follower_id, slug):
|
|
try:
|
|
with local_session() as session:
|
|
topic = session.query(Topic).where(Topic.slug == slug).one()
|
|
_following = TopicFollower(topic=topic.id, follower=follower_id)
|
|
return True
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
def topic_unfollow(user_id, slug):
|
|
try:
|
|
with local_session() as session:
|
|
sub = (
|
|
session.query(TopicFollower)
|
|
.join(Topic)
|
|
.filter(and_(TopicFollower.follower == user_id, Topic.slug == slug))
|
|
.first()
|
|
)
|
|
if sub:
|
|
session.delete(sub)
|
|
session.commit()
|
|
return True
|
|
except Exception:
|
|
pass
|
|
return False
|
|
|
|
|
|
async def topics_random(_, info, amount=12):
|
|
q = select(Topic)
|
|
q = q.join(ShoutTopic)
|
|
q = q.group_by(Topic.id)
|
|
q = q.having(func.count(distinct(ShoutTopic.shout)) > 2)
|
|
q = q.order_by(func.random()).limit(amount)
|
|
|
|
topics = []
|
|
with local_session() as session:
|
|
for [topic] in session.execute(q):
|
|
topics.append(topic)
|
|
|
|
return topics
|