467 lines
14 KiB
Python
467 lines
14 KiB
Python
from sqlalchemy import bindparam, distinct, or_, text
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from sqlalchemy.orm import aliased, joinedload
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from sqlalchemy.sql.expression import and_, asc, case, desc, func, nulls_last, select
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from orm.author import Author, AuthorFollower
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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, TopicFollower
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from resolvers.reaction import add_reaction_stat_columns
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from resolvers.topic import get_topics_random
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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.logger import root_logger as logger
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from services.schema import query
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from services.search import search_text
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from services.viewed import ViewedStorage
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def query_shouts():
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return (
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select(Shout)
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.options(joinedload(Shout.authors), joinedload(Shout.topics))
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.where(and_(Shout.published_at.is_not(None), Shout.deleted_at.is_(None)))
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)
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def filter_my(info, session, q):
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user_id = info.context.get("user_id")
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reader_id = info.context.get("author", {}).get("id")
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if user_id and reader_id:
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reader_followed_authors = select(AuthorFollower.author).where(
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AuthorFollower.follower == reader_id
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)
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reader_followed_topics = select(TopicFollower.topic).where(
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TopicFollower.follower == reader_id
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)
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subquery = (
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select(Shout.id)
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.where(Shout.id == ShoutAuthor.shout)
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.where(Shout.id == ShoutTopic.shout)
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.where(
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(ShoutAuthor.author.in_(reader_followed_authors))
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| (ShoutTopic.topic.in_(reader_followed_topics))
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)
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)
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q = q.filter(Shout.id.in_(subquery))
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return q, reader_id
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def apply_filters(q, filters, author_id=None):
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if isinstance(filters, dict):
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if filters.get("reacted"):
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q.join(Reaction, Reaction.created_by == author_id)
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by_featured = filters.get("featured")
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if by_featured:
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q = q.filter(Shout.featured_at.is_not(None))
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by_layouts = filters.get("layouts")
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if by_layouts:
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q = q.filter(Shout.layout.in_(by_layouts))
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by_author = filters.get("author")
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if by_author:
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q = q.filter(Shout.authors.any(slug=by_author))
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by_topic = filters.get("topic")
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if by_topic:
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q = q.filter(Shout.topics.any(slug=by_topic))
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by_after = filters.get("after")
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if by_after:
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ts = int(by_after)
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q = q.filter(Shout.created_at > ts)
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return q
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@query.field("get_shout")
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async def get_shout(_, info, slug: str):
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with local_session() as session:
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q = query_shouts()
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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q = q.filter(Shout.slug == slug)
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q = q.group_by(Shout.id)
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results = session.execute(q).first()
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if results:
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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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likes_stat,
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dislikes_stat,
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last_comment,
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] = results
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shout.stat = {
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"viewed": await ViewedStorage.get_shout(shout.slug),
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": int(likes_stat or 0) - int(dislikes_stat or 0),
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"last_comment": last_comment,
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}
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for author_caption in (
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session.query(ShoutAuthor)
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.join(Shout)
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.where(
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and_(
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Shout.slug == slug,
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Shout.published_at.is_not(None),
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Shout.deleted_at.is_(None),
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)
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)
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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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main_topic = (
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session.query(Topic.slug)
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.join(
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ShoutTopic,
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and_(
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ShoutTopic.topic == Topic.id,
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ShoutTopic.shout == shout.id,
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ShoutTopic.main.is_(True),
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),
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)
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.first()
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)
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if main_topic:
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shout.main_topic = main_topic[0]
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return shout
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@query.field("load_shouts_by")
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async def load_shouts_by(_, _info, options):
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"""
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:param options: {
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filters: {
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layouts: ['audio', 'video', ..],
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reacted: True,
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featured: True, // filter featured-only
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author: 'discours',
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topic: 'culture',
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after: 1234567 // unixtime
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}
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offset: 0
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limit: 50
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order_by: 'created_at' | 'commented' | 'likes_stat'
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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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# base
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q = query_shouts()
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# stats
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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# filters
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filters = options.get("filters", {})
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q = apply_filters(q, filters)
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# group
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q = q.group_by(Shout.id)
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# order
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order_by = Shout.featured_at if filters.get("featured") else Shout.published_at
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order_str = options.get("order_by")
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if order_str in ["likes", "shouts", "followers", "comments", "last_comment"]:
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q = q.order_by(desc(text(f"{order_str}_stat")))
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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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q = q.order_by(nulls_last(query_order_by))
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# limit offset
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offset = options.get("offset", 0)
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limit = options.get("limit", 10)
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q = q.limit(limit).offset(offset)
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shouts = []
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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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likes_stat,
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dislikes_stat,
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last_comment,
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] in session.execute(q).unique():
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main_topic = (
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session.query(Topic.slug)
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.join(
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ShoutTopic,
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and_(
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ShoutTopic.topic == Topic.id,
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ShoutTopic.shout == shout.id,
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ShoutTopic.main.is_(True),
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),
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)
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.first()
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)
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if main_topic:
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shout.main_topic = main_topic[0]
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shout.stat = {
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"viewed": await ViewedStorage.get_shout(shout.slug),
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": int(likes_stat) - int(dislikes_stat),
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"last_comment": last_comment,
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}
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shouts.append(shout)
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return shouts
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@query.field("load_shouts_feed")
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@login_required
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async def load_shouts_feed(_, info, options):
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shouts = []
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with local_session() as session:
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q = query_shouts()
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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# filters
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filters = options.get("filters", {})
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if filters:
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q, reader_id = filter_my(info, session, q)
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q = apply_filters(q, filters, reader_id)
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# sort order
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order_by = options.get(
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"order_by",
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Shout.featured_at if filters.get("featured") else Shout.published_at,
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)
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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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# pagination
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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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# print(q.compile(compile_kwargs={"literal_binds": True}))
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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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likes_stat,
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dislikes_stat,
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last_comment,
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] in session.execute(q).unique():
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main_topic = (
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session.query(Topic.slug)
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.join(
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ShoutTopic,
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and_(
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ShoutTopic.topic == Topic.id,
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ShoutTopic.shout == shout.id,
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ShoutTopic.main.is_(True),
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),
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)
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.first()
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)
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if main_topic:
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shout.main_topic = main_topic[0]
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shout.stat = {
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"viewed": await ViewedStorage.get_shout(shout.slug),
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": likes_stat - dislikes_stat,
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"last_comment": last_comment,
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}
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shouts.append(shout)
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return shouts
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@query.field("load_shouts_search")
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async def load_shouts_search(_, _info, text, limit=50, offset=0):
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if isinstance(text, str) and len(text) > 2:
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results = await search_text(text, limit, offset)
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logger.debug(results)
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return results
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return []
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@query.field("load_shouts_unrated")
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@login_required
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async def load_shouts_unrated(_, info, limit: int = 50, offset: int = 0):
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q = query_shouts()
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q = (
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q.outerjoin(
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Reaction,
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and_(
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Reaction.shout == Shout.id,
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Reaction.replyTo.is_(None),
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Reaction.kind.in_(
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[ReactionKind.LIKE.value, ReactionKind.DISLIKE.value]
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),
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),
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)
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.outerjoin(Author, Author.user == bindparam("user_id"))
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.where(
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and_(
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Shout.deleted_at.is_(None),
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Shout.layout.is_not(None),
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or_(Author.id.is_(None), Reaction.created_by != Author.id),
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)
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)
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)
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# 3 or fewer votes is 0, 1, 2 or 3 votes (null, reaction id1, reaction id2, reaction id3)
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q = q.having(func.count(distinct(Reaction.id)) <= 4)
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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q = q.group_by(Shout.id).order_by(func.random()).limit(limit).offset(offset)
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user_id = info.context.get("user_id") if isinstance(info.context, dict) else None
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if user_id:
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with local_session() as session:
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author = session.query(Author).filter(Author.user == user_id).first()
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if author:
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return await get_shouts_from_query(q, author.id)
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else:
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return await get_shouts_from_query(q)
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async def get_shouts_from_query(q, author_id=None):
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shouts = []
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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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likes_stat,
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dislikes_stat,
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last_comment,
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] in session.execute(q, {"author_id": author_id}).unique():
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shouts.append(shout)
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shout.stat = {
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"viewed": await ViewedStorage.get_shout(shout_slug=shout.slug),
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"reacted": reacted_stat,
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"commented": commented_stat,
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"rating": int(likes_stat or 0) - int(dislikes_stat or 0),
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"last_comment": last_comment,
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}
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return shouts
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@query.field("load_shouts_random_top")
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async def load_shouts_random_top(_, _info, options):
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"""
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:param _
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:param _info: GraphQLInfoContext
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:param options: {
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filters: {
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layouts: ['music']
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after: 13245678
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}
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random_limit: 100
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limit: 50
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offset: 0
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}
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:return: Shout[]
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"""
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aliased_reaction = aliased(Reaction)
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subquery = (
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select(Shout.id)
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.outerjoin(aliased_reaction)
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.where(and_(Shout.deleted_at.is_(None), Shout.layout.is_not(None)))
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)
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subquery = apply_filters(subquery, options.get("filters", {}))
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subquery = subquery.group_by(Shout.id).order_by(
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desc(
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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.reply_to.is_not(None), 0),
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(aliased_reaction.kind == ReactionKind.LIKE.value, 1),
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(aliased_reaction.kind == ReactionKind.DISLIKE.value, -1),
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else_=0,
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)
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)
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)
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)
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random_limit = options.get("random_limit", 100)
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if random_limit:
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subquery = subquery.limit(random_limit)
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q = (
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select(Shout)
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.options(joinedload(Shout.authors), joinedload(Shout.topics))
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.where(Shout.id.in_(subquery))
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)
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q = add_reaction_stat_columns(q, aliased_reaction)
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limit = options.get("limit", 10)
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q = q.group_by(Shout.id).order_by(func.random()).limit(limit)
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shouts = await get_shouts_from_query(q)
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return shouts
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@query.field("load_shouts_random_topic")
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async def load_shouts_random_topic(_, info, limit: int = 10):
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[topic] = get_topics_random(None, None, 1)
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if topic:
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shouts = fetch_shouts_by_topic(topic, limit)
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if shouts:
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return {"topic": topic, "shouts": shouts}
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return {
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"error": "failed to get random topic after few retries",
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"shouts": [],
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"topic": {},
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}
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def fetch_shouts_by_topic(topic, limit):
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q = (
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select(Shout)
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.options(joinedload(Shout.authors), joinedload(Shout.topics))
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.filter(
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and_(
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Shout.deleted_at.is_(None),
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Shout.featured_at.is_not(None),
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Shout.topics.any(slug=topic.slug),
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)
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)
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)
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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q = q.group_by(Shout.id).order_by(desc(Shout.created_at)).limit(limit)
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shouts = get_shouts_from_query(q)
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return shouts
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