92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
from datetime import datetime
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from sqlalchemy import select, func, desc as sa_desc, asc as sa_asc, literal
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from sqlalchemy.ext.asyncio import AsyncSession
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from backend.models.author import Author
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from backend.models.post import Post
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from backend.models.comment import Comment
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async def list_authors(
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db: AsyncSession,
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subreddit_id: int | None = None,
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sort_by: str = "total_comments",
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sort_order: str = "desc",
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since: datetime | None = None,
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until: datetime | None = None,
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page: int = 1,
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per_page: int = 25,
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) -> tuple[list[dict], int]:
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# Always compute counts from actual data
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post_count = select(func.count(Post.id)).where(Post.author_id == Author.id)
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comment_count = select(func.count(Comment.id)).where(Comment.author_id == Author.id)
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if subreddit_id:
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post_count = post_count.where(Post.subreddit_id == subreddit_id)
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comment_count = comment_count.join(Post).where(Post.subreddit_id == subreddit_id)
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if since:
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post_count = post_count.where(Post.created_utc >= since)
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comment_count = comment_count.where(Comment.created_utc >= since)
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if until:
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post_count = post_count.where(Post.created_utc <= until)
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comment_count = comment_count.where(Comment.created_utc <= until)
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post_sub = post_count.correlate(Author).scalar_subquery().label("total_posts")
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comment_sub = comment_count.correlate(Author).scalar_subquery().label("total_comments")
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base = select(Author, post_sub, comment_sub)
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# Only show authors with activity
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having_activity = base.having(
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(post_sub > 0) | (comment_sub > 0)
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).group_by(Author.id)
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# Count total active authors
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count_stmt = select(func.count()).select_from(having_activity.subquery())
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total = (await db.execute(count_stmt)).scalar() or 0
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# Sort by computed counts
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if sort_by == "total_posts":
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sort_col = post_sub
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else:
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sort_col = comment_sub
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order_fn = sa_desc if sort_order == "desc" else sa_asc
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query = base.order_by(order_fn(sort_col)).offset((page - 1) * per_page).limit(per_page)
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result = await db.execute(query)
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authors = []
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for row in result.all():
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author = row[0]
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data = {c.name: getattr(author, c.name) for c in author.__table__.columns}
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data["total_posts"] = row[1] or 0
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data["total_comments"] = row[2] or 0
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authors.append(data)
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return authors, total
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async def get_author(db: AsyncSession, author_id: int) -> dict | None:
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post_count = (
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select(func.count(Post.id))
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.where(Post.author_id == author_id)
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.scalar_subquery()
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)
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comment_count = (
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select(func.count(Comment.id))
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.where(Comment.author_id == author_id)
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.scalar_subquery()
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)
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result = await db.execute(
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select(Author, post_count.label("total_posts"), comment_count.label("total_comments"))
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.where(Author.id == author_id)
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)
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row = result.first()
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if not row:
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return None
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author = row[0]
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data = {c.name: getattr(author, c.name) for c in author.__table__.columns}
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data["total_posts"] = row[1] or 0
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data["total_comments"] = row[2] or 0
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return data
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