This commit is contained in:
258
resolvers/reader.py
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258
resolvers/reader.py
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from datetime import datetime, timedelta, timezone
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from aiohttp.web_exceptions import HTTPException
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from sqlalchemy.orm import joinedload, aliased
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from sqlalchemy.sql.expression import desc, asc, select, func, case, and_, nulls_last
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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 orm.topic import TopicFollower
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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.author import AuthorFollower
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def add_stat_columns(q):
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aliased_reaction = aliased(Reaction)
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q = q.outerjoin(aliased_reaction).add_columns(
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func.sum(aliased_reaction.id).label("reacted_stat"),
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func.sum(
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case((aliased_reaction.kind == ReactionKind.COMMENT, 1), else_=0)
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).label("commented_stat"),
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func.sum(
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case(
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# do not count comments' reactions
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(aliased_reaction.replyTo.is_not(None), 0),
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(aliased_reaction.kind == ReactionKind.AGREE, 1),
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(aliased_reaction.kind == ReactionKind.DISAGREE, -1),
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(aliased_reaction.kind == ReactionKind.PROOF, 1),
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(aliased_reaction.kind == ReactionKind.DISPROOF, -1),
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(aliased_reaction.kind == ReactionKind.ACCEPT, 1),
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(aliased_reaction.kind == ReactionKind.REJECT, -1),
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(aliased_reaction.kind == ReactionKind.LIKE, 1),
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(aliased_reaction.kind == ReactionKind.DISLIKE, -1),
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else_=0,
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)
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).label("rating_stat"),
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func.max(
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case(
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(aliased_reaction.kind != ReactionKind.COMMENT, None),
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else_=aliased_reaction.createdAt,
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)
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).label("last_comment"),
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)
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return q
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def apply_filters(q, filters, author_id=None):
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if filters.get("reacted") and author_id:
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q.join(Reaction, Reaction.createdBy == author_id)
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v = filters.get("visibility")
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if v == "public":
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q = q.filter(Shout.visibility == filters.get("visibility"))
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if v == "community":
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q = q.filter(Shout.visibility.in_(["public", "community"]))
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if filters.get("layout"):
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q = q.filter(Shout.layout == filters.get("layout"))
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if filters.get("author"):
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q = q.filter(Shout.authors.any(slug=filters.get("author")))
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if filters.get("topic"):
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q = q.filter(Shout.topics.any(slug=filters.get("topic")))
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if filters.get("title"):
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q = q.filter(Shout.title.ilike(f'%{filters.get("title")}%'))
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if filters.get("body"):
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q = q.filter(Shout.body.ilike(f'%{filters.get("body")}%s'))
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if filters.get("days"):
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before = datetime.now(tz=timezone.utc) - timedelta(
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days=int(filters.get("days")) or 30
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)
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q = q.filter(Shout.createdAt > before)
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return q
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async def load_shout(_, _info, slug=None, shout_id=None):
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with local_session() as session:
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q = select(Shout).options(
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joinedload(Shout.authors),
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joinedload(Shout.topics),
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)
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q = add_stat_columns(q)
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if slug is not None:
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q = q.filter(Shout.slug == slug)
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if shout_id is not None:
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q = q.filter(Shout.id == shout_id)
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q = q.filter(Shout.deletedAt.is_(None)).group_by(Shout.id)
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try:
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[
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shout,
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reacted_stat,
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commented_stat,
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rating_stat,
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_last_comment,
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] = session.execute(q).first()
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shout.stat = {
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"viewed": shout.views,
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": rating_stat,
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}
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for author_caption in (
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session.query(ShoutAuthor).join(Shout).where(Shout.slug == slug)
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):
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for author in shout.authors:
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if author.id == author_caption.author:
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author.caption = author_caption.caption
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return shout
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except Exception:
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raise HTTPException(status_code=404, detail="Slug was not found: %s" % slug)
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async def load_shouts_by(_, info, options):
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"""
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:param _:
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:param info:GraphQLInfo
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:param options: {
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filters: {
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layout: 'audio',
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visibility: "public",
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author: 'discours',
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topic: 'culture',
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title: 'something',
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body: 'something else',
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days: 30
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}
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offset: 0
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limit: 50
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order_by: 'createdAt' | 'commented' | 'reacted' | 'rating'
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order_by_desc: true
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}
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:return: Shout[]
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"""
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q = (
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select(Shout)
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.options(
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joinedload(Shout.authors),
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joinedload(Shout.topics),
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)
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.where(Shout.deletedAt.is_(None))
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)
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q = add_stat_columns(q)
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author_id = info.context["author_id"]
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q = apply_filters(q, options.get("filters", {}), author_id)
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order_by = options.get("order_by", Shout.publishedAt)
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query_order_by = (
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desc(order_by) if options.get("order_by_desc", True) else asc(order_by)
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)
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offset = options.get("offset", 0)
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limit = options.get("limit", 10)
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q = (
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q.group_by(Shout.id)
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.order_by(nulls_last(query_order_by))
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.limit(limit)
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.offset(offset)
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)
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shouts = []
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shouts_map = {}
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with local_session() as session:
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for [
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shout,
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reacted_stat,
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commented_stat,
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rating_stat,
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_last_comment,
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] in session.execute(q).unique():
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shouts.append(shout)
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shout.stat = {
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"viewed": shout.views,
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": rating_stat,
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}
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shouts_map[shout.id] = shout
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return shouts
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@login_required
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async def get_my_feed(_, info, options):
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author_id = info.context["author_id"]
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with local_session() as session:
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subquery = (
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select(Shout.id)
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.join(ShoutAuthor)
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.join(AuthorFollower, AuthorFollower.follower._is(author_id))
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.join(ShoutTopic)
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.join(TopicFollower, TopicFollower.follower._is(author_id))
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)
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q = (
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select(Shout)
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.options(
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joinedload(Shout.authors),
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joinedload(Shout.topics),
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)
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.where(
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and_(
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Shout.publishedAt.is_not(None),
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Shout.deletedAt.is_(None),
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Shout.id.in_(subquery),
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)
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)
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)
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q = add_stat_columns(q)
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q = apply_filters(q, options.get("filters", {}), author_id)
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order_by = options.get("order_by", Shout.publishedAt)
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query_order_by = (
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desc(order_by) if options.get("order_by_desc", True) else asc(order_by)
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)
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offset = options.get("offset", 0)
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limit = options.get("limit", 10)
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q = (
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q.group_by(Shout.id)
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.order_by(nulls_last(query_order_by))
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.limit(limit)
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.offset(offset)
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)
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shouts = []
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shouts_map = {}
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for [
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shout,
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reacted_stat,
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commented_stat,
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rating_stat,
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_last_comment,
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] in session.execute(q).unique():
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shouts.append(shout)
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shout.stat = {
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"viewed": shout.views,
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": rating_stat,
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}
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shouts_map[shout.id] = shout
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# FIXME: shouts_map does not go anywhere?
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return shouts
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