devplacepy/devplacepy/routers/feed.py

import logging
from fastapi import APIRouter, Request
from fastapi.responses import HTMLResponse
from devplacepy.database import get_table, get_daily_topic, get_users_by_uids, get_comment_counts_by_post_uids, get_site_stats, get_top_authors
from devplacepy.attachments import get_attachments_batch
from devplacepy.content import enrich_items
from devplacepy.templating import templates
from devplacepy.utils import get_current_user
from devplacepy.seo import list_page_seo

logger = logging.getLogger(__name__)
router = APIRouter()

PAGE_SIZE = 25


def get_feed_posts(user, tab: str = "all", topic: str = None, before: str = None):
    posts_table = get_table("posts")
    order = ["-stars", "-created_at"] if tab == "trending" else ["-created_at"]

    if tab == "following":
        if not user:
            return [], None
        follows = get_table("follows")
        following = [f["following_uid"] for f in follows.find(follower_uid=user["uid"])]
        if not following:
            return [], None
        clauses = [posts_table.table.columns.user_uid.in_(following)]
        if before:
            clauses.append(posts_table.table.columns.created_at < before)
        posts = list(posts_table.find(*clauses, order_by=order, _limit=PAGE_SIZE + 1))
    else:
        filters = {}
        if topic:
            filters["topic"] = topic
        if before:
            filters["created_at"] = {"<": before}
        posts = list(posts_table.find(**filters, order_by=order, _limit=PAGE_SIZE + 1))

    has_more = len(posts) > PAGE_SIZE
    posts = posts[:PAGE_SIZE]

    next_cursor = posts[-1]["created_at"] if has_more and posts else None

    if not posts:
        return [], next_cursor

    authors = get_users_by_uids([p["user_uid"] for p in posts])
    counts = get_comment_counts_by_post_uids([p["uid"] for p in posts])

    result = enrich_items(posts, "post", authors, {"comment_count": counts}, user=user)
    return result, next_cursor


@router.get("", response_class=HTMLResponse)
async def feed_page(request: Request, tab: str = "all", topic: str = None, before: str = None):
    user = get_current_user(request)
    posts, next_cursor = get_feed_posts(user, tab, topic, before)
    stats = get_site_stats()
    top_authors = get_top_authors(5)
    daily_topic = get_daily_topic()

    post_uids_list = [item["post"]["uid"] for item in posts]
    attachments_map = get_attachments_batch("post", post_uids_list)
    for item in posts:
        item["attachments"] = attachments_map.get(item["post"]["uid"], [])

    seo_ctx = list_page_seo(
        request,
        title="Feed",
        description="Discover the latest developer discussions, projects, and community activity on DevPlace.",
        breadcrumbs=[{"name": "Home", "url": "/feed"}, {"name": "Feed", "url": "/feed"}],
    )
    return templates.TemplateResponse(request, "feed.html", {
        **seo_ctx,
        "request": request,
        "user": user,
        "posts": posts,
        "current_tab": tab,
        "current_topic": topic,
        "total_members": stats["total_members"],
        "posts_today": stats["posts_today"],
        "total_projects": stats["total_projects"],
        "total_gists": stats["total_gists"],
        "top_authors": top_authors,
        "daily_topic": daily_topic,
        "next_cursor": next_cursor,
    })