324 lines
9.8 KiB
Python
324 lines
9.8 KiB
Python
import time
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from typing import List
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from sqlalchemy import and_, desc, distinct, func, select, or_
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from sqlalchemy.orm import aliased
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from orm.author import Author, AuthorFollower, AuthorRating
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from orm.reaction import Reaction, ReactionKind
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from orm.shout import Shout, ShoutAuthor, ShoutTopic
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from orm.topic import Topic
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from resolvers.follower import get_follows_by_user_id
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from services.auth import login_required
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from services.db import local_session
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from services.rediscache import redis
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from services.schema import mutation, query
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from services.viewed import ViewedStorage
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from services.logger import root_logger as logger
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def add_author_stat_columns(q):
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shout_author_aliased = aliased(ShoutAuthor)
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q = q.outerjoin(shout_author_aliased).add_columns(
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func.count(distinct(shout_author_aliased.shout)).label("shouts_stat")
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)
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followers_table = aliased(AuthorFollower)
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q = q.outerjoin(followers_table, followers_table.author == Author.id).add_columns(
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func.count(distinct(followers_table.follower)).label("followers_stat")
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)
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followings_table = aliased(AuthorFollower)
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q = q.outerjoin(
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followings_table, followings_table.follower == Author.id
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).add_columns(func.count(distinct(followers_table.author)).label("followings_stat"))
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q = q.group_by(Author.id)
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return q
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async def get_authors_from_query(q):
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authors = []
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with local_session() as session:
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for [author, shouts_stat, followers_stat, followings_stat] in session.execute(
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q
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):
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author.stat = {
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"shouts": shouts_stat,
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"viewed": await ViewedStorage.get_author(author.slug),
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"followers": followers_stat,
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"followings": followings_stat,
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}
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authors.append(author)
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return authors
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@mutation.field("update_author")
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@login_required
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async def update_author(_, info, profile):
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user_id = info.context["user_id"]
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with local_session() as session:
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author = session.query(Author).where(Author.user == user_id).first()
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Author.update(author, profile)
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session.add(author)
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session.commit()
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return {"error": None, "author": author}
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# TODO: caching query
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@query.field("get_authors_all")
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async def get_authors_all(_, _info):
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authors = []
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with local_session() as session:
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authors = session.query(Author).all()
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return authors
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def count_author_comments_rating(session, author_id) -> int:
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replied_alias = aliased(Reaction)
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replies_likes = (
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session.query(replied_alias)
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.join(Reaction, replied_alias.id == Reaction.reply_to)
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.where(
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and_(
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replied_alias.created_by == author_id,
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replied_alias.kind == ReactionKind.COMMENT.value,
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)
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)
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.filter(replied_alias.kind == ReactionKind.LIKE.value)
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.count()
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) or 0
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replies_dislikes = (
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session.query(replied_alias)
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.join(Reaction, replied_alias.id == Reaction.reply_to)
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.where(
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and_(
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replied_alias.created_by == author_id,
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replied_alias.kind == ReactionKind.COMMENT.value,
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)
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)
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.filter(replied_alias.kind == ReactionKind.DISLIKE.value)
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.count()
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) or 0
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return replies_likes - replies_dislikes
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def count_author_shouts_rating(session, author_id) -> int:
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shouts_likes = (
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session.query(Reaction, Shout)
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.join(Shout, Shout.id == Reaction.shout)
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.filter(
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and_(
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Shout.authors.any(id=author_id),
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Reaction.kind == ReactionKind.LIKE.value,
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)
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)
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.count()
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or 0
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)
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shouts_dislikes = (
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session.query(Reaction, Shout)
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.join(Shout, Shout.id == Reaction.shout)
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.filter(
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and_(
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Shout.authors.any(id=author_id),
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Reaction.kind == ReactionKind.DISLIKE.value,
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)
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)
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.count()
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or 0
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)
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return shouts_likes - shouts_dislikes
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async def load_author_with_stats(q):
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q = add_author_stat_columns(q)
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result = await get_authors_from_query(q)
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if result:
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[author] = result
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with local_session() as session:
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comments_count = (
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session.query(Reaction)
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.filter(
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and_(
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Reaction.created_by == author.id,
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Reaction.kind == ReactionKind.COMMENT.value,
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Reaction.deleted_at.is_(None),
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)
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)
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.count()
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)
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likes_count = (
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session.query(AuthorRating)
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.filter(
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and_(AuthorRating.author == author.id, AuthorRating.plus.is_(True))
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)
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.count()
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)
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dislikes_count = (
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session.query(AuthorRating)
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.filter(
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and_(
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AuthorRating.author == author.id, AuthorRating.plus.is_not(True)
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)
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)
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.count()
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)
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author.stat["rating"] = likes_count - dislikes_count
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author.stat["rating_shouts"] = count_author_shouts_rating(
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session, author.id
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)
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author.stat["rating_comments"] = count_author_comments_rating(
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session, author.id
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)
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author.stat["commented"] = comments_count
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return author
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@query.field("get_author")
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async def get_author(_, _info, slug="", author_id=None):
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q = None
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if slug or author_id:
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if bool(slug):
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q = select(Author).where(Author.slug == slug)
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if author_id:
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q = select(Author).where(Author.id == author_id)
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return await load_author_with_stats(q)
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async def get_author_by_user_id(user_id: str):
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redis_key = f"user:{user_id}:author"
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res = await redis.execute("HGET", redis_key)
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if res:
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return res
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logger.info(f"getting author id for {user_id}")
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q = select(Author).filter(Author.user == user_id)
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author = await load_author_with_stats(q)
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await redis.execute("HSET", redis_key, author.dict())
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return author
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@query.field("get_author_id")
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async def get_author_id(_, _info, user: str):
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return get_author_by_user_id(user)
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@query.field("load_authors_by")
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async def load_authors_by(_, _info, by, limit, offset):
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q = select(Author)
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q = add_author_stat_columns(q)
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if by.get("slug"):
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q = q.filter(Author.slug.ilike(f"%{by['slug']}%"))
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elif by.get("name"):
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q = q.filter(Author.name.ilike(f"%{by['name']}%"))
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elif by.get("topic"):
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q = (
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q.join(ShoutAuthor)
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.join(ShoutTopic)
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.join(Topic)
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.where(Topic.slug == by["topic"])
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)
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if by.get("last_seen"): # in unix time
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before = int(time.time()) - by["last_seen"]
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q = q.filter(Author.last_seen > before)
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elif by.get("created_at"): # in unix time
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before = int(time.time()) - by["created_at"]
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q = q.filter(Author.created_at > before)
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order = by.get("order")
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if order == "followers" or order == "shouts":
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q = q.order_by(desc(f"{order}_stat"))
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q = q.limit(limit).offset(offset)
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authors = await get_authors_from_query(q)
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return authors
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@query.field("get_author_follows")
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async def get_author_follows(
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_, _info, slug="", user=None, author_id=None
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) -> List[Author]:
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user_id = user
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if author_id or slug:
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with local_session() as session:
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author = (
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session.query(Author)
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.where(or_(Author.id == author_id, Author.slug == slug))
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.first()
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)
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user_id = author.user
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if user_id:
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follows = await get_follows_by_user_id(user)
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return follows
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else:
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raise ValueError("Author not found")
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@query.field("get_author_followers")
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async def get_author_followers(_, _info, slug) -> List[Author]:
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q = select(Author)
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q = add_author_stat_columns(q)
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aliased_author = aliased(Author)
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q = (
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q.join(AuthorFollower, AuthorFollower.follower == Author.id)
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.join(aliased_author, aliased_author.id == AuthorFollower.author)
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.where(aliased_author.slug == slug)
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)
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return await get_authors_from_query(q)
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@mutation.field("rate_author")
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@login_required
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async def rate_author(_, info, rated_slug, value):
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user_id = info.context["user_id"]
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with local_session() as session:
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rated_author = session.query(Author).filter(Author.slug == rated_slug).first()
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rater = session.query(Author).filter(Author.slug == user_id).first()
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if rater and rated_author:
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rating: AuthorRating = (
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session.query(AuthorRating)
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.filter(
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and_(
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AuthorRating.rater == rater.id,
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AuthorRating.author == rated_author.id,
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)
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)
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.first()
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)
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if rating:
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rating.plus = value > 0
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session.add(rating)
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session.commit()
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return {}
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else:
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try:
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rating = AuthorRating(
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rater=rater.id, author=rated_author.id, plus=value > 0
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)
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session.add(rating)
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session.commit()
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except Exception as err:
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return {"error": err}
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return {}
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async def create_author(user_id: str, slug: str, name: str = ""):
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with local_session() as session:
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new_author = Author(user=user_id, slug=slug, name=name)
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session.add(new_author)
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session.commit()
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logger.info(f"author created by webhook {new_author.dict()}")
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