539 lines
17 KiB
Python
539 lines
17 KiB
Python
from sqlalchemy import bindparam, distinct, or_, text
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from sqlalchemy.orm import aliased, joinedload, selectinload
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from sqlalchemy.sql.expression import and_, asc, case, desc, func, nulls_last, select
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from starlette.exceptions import HTTPException
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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.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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from services.logger import root_logger as logger
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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.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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@login_required
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async def get_shout(_, info, slug=None, shout_id=None):
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with local_session() as session:
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q = select(Shout).options(joinedload(Shout.authors), joinedload(Shout.topics))
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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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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.deleted_at.is_(None)).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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if not shout.published_at:
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user_id = info.context.get('user_id', '')
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if not user_id:
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logger.warn('user is not logged in')
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logger.debug(info)
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raise HTTPException(
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status_code=401, detail='shout is not published yet'
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)
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roles = info.context.get('roles', [])
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logger.debug(f'{user_id} is getting shout which is not published yet')
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logger.debug(f'roles: {roles}')
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author = session.query(Author).filter(Author.user == user_id).first()
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logger.debug(author)
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if not author:
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logger.warn('author is not found')
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raise HTTPException(
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status_code=401, detail='shout is not published yet'
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)
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author_id = author.id if author else None
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if (
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author_id is not None
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and shout.created_by != author_id
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and not any(x == author_id for x in [a.id for a in shout.authors])
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and 'editor' not in roles
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):
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logger.warn('author have no permissions to read this not published shout')
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raise HTTPException(
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status_code=401, detail='shout is not published yet'
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)
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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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}
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for author_caption in (
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session.query(ShoutAuthor).join(Shout).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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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 = (
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select(Shout)
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.options(joinedload(Shout.authors), joinedload(Shout.topics))
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.where(
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and_(
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Shout.deleted_at.is_(None),
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Shout.published_at.is_not(None)
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)
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)
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)
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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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}
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shouts.append(shout)
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return shouts
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@login_required
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@query.field('load_shouts_drafts')
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async def load_shouts_drafts(_, info):
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user_id = info.context.get('user_id')
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shouts = []
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if user_id:
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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_not(None),
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Shout.published_at.is_(None)
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)
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)
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)
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shouts = []
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with local_session() as session:
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reader = session.query(Author).filter(Author.user == user_id).first()
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if isinstance(reader, Author):
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q = q.filter(Shout.created_by == reader.id)
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q = q.group_by(Shout.id)
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for [shout] 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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shouts.append(shout)
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return shouts
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@login_required
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@query.field('load_shouts_feed')
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async def load_shouts_feed(_, info, options):
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user_id = info.context['user_id']
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shouts = []
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with local_session() as session:
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reader = session.query(Author).filter(Author.user == user_id).first()
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if reader:
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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 = (
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select(Shout)
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.options(joinedload(Shout.authors), joinedload(Shout.topics))
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.where(
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and_(
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Shout.published_at.is_not(None),
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Shout.deleted_at.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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aliased_reaction = aliased(Reaction)
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q = add_reaction_stat_columns(q, aliased_reaction)
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filters = options.get('filters', {})
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q = apply_filters(q, filters, reader.id)
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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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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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}
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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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@login_required
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@query.field('load_shouts_unrated')
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async def load_shouts_unrated(_, info, limit: int = 50, offset: int = 0):
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q = (
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select(Shout)
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.options(selectinload(Shout.authors), selectinload(Shout.topics))
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.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')
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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).outerjoin(aliased_reaction).where(Shout.deleted_at.is_(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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(Reaction.kind == str(ReactionKind.LIKE.value), 1),
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(Reaction.kind == str(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')
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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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aliased_reaction = aliased(Reaction)
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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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