myYouTube/backend/app/api/feed.py
vrubelroman fe16c08daa Implement Phase 6: MeTube download integration
- MeTubeClient encapsulates all MeTube HTTP/Socket.IO calls (verified against
  the real MeTube source: /add returns no job id, GET /history gives a queue
  snapshot for reconciliation, filenames arrive already relative, percent is
  a 0-100 float)
- download_jobs table + service: request/dedup active downloads, apply live
  Socket.IO events (added/updated/completed/canceled/cleared) matched by
  canonical YouTube URL, safe relative-path -> public media URL construction
- Reconciliation on startup against MeTube's live queue/done state (section 19):
  non-terminal jobs recovered where possible, else marked "unknown"; already
  completed jobs are left untouched
- POST/GET /api/videos/{id}/download(-status), recheck-local; feed/video
  detail now report real local availability instead of a stub
- Frontend: download button with live status polling (queued/downloading %/
  postprocessing/completed/failed+retry), local <video> playback with
  YouTube fallback on playback error
- health.py now delegates to MeTubeClient (single place for MeTube calls)

26 new backend tests (63 total). Verified live: Socket.IO connects
successfully to the real MeTube instance on deploy.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-16 18:56:17 +00:00

91 lines
3.2 KiB
Python

import base64
from datetime import datetime, timezone
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy import select
from sqlalchemy.orm import Session
from app.core.auth_dependency import require_session
from app.db import get_db
from app.models.channel import Channel
from app.models.channel_category import channel_categories
from app.models.video import Video
from app.services.download_jobs import latest_jobs_map
from app.services.video_presentation import channel_categories_map, serialize_video
router = APIRouter(dependencies=[Depends(require_session)])
DEFAULT_LIMIT = 30
MAX_LIMIT = 100
def _encode_cursor(published_at: datetime, video_id: int) -> str:
raw = f"{published_at.isoformat()}|{video_id}"
return base64.urlsafe_b64encode(raw.encode()).decode()
def _decode_cursor(cursor: str) -> tuple[datetime, int]:
try:
raw = base64.urlsafe_b64decode(cursor.encode()).decode()
published_at_raw, video_id_raw = raw.rsplit("|", 1)
published_at = datetime.fromisoformat(published_at_raw)
if published_at.tzinfo is None:
published_at = published_at.replace(tzinfo=timezone.utc)
return published_at, int(video_id_raw)
except Exception:
raise HTTPException(status_code=400, detail="Invalid cursor")
@router.get("/feed")
def get_feed(
category_id: int | None = None,
uncategorized: bool = False,
channel_id: int | None = None,
limit: int = Query(DEFAULT_LIMIT, ge=1, le=MAX_LIMIT),
cursor: str | None = None,
db: Session = Depends(get_db),
) -> dict:
query = db.query(Video)
if channel_id is not None:
query = query.filter(Video.channel_id == channel_id)
elif uncategorized:
categorized_channel_ids = select(channel_categories.c.channel_id)
query = query.filter(~Video.channel_id.in_(categorized_channel_ids))
elif category_id is not None:
channel_ids_in_category = select(channel_categories.c.channel_id).where(
channel_categories.c.category_id == category_id
)
query = query.filter(Video.channel_id.in_(channel_ids_in_category))
if cursor:
cursor_published_at, cursor_id = _decode_cursor(cursor)
query = query.filter(
(Video.published_at < cursor_published_at)
| ((Video.published_at == cursor_published_at) & (Video.id < cursor_id))
)
query = query.order_by(Video.published_at.desc(), Video.id.desc())
rows = query.limit(limit + 1).all()
next_cursor = None
if len(rows) > limit:
last_kept = rows[limit - 1]
next_cursor = _encode_cursor(last_kept.published_at, last_kept.id)
rows = rows[:limit]
channel_ids = list({v.channel_id for v in rows})
channels = {c.id: c for c in db.query(Channel).filter(Channel.id.in_(channel_ids)).all()}
categories_map = channel_categories_map(db, channel_ids)
jobs_map = latest_jobs_map(db, [v.id for v in rows])
items = []
for video in rows:
channel = channels.get(video.channel_id)
if channel is None:
continue
items.append(
serialize_video(video, channel, categories_map.get(channel.id, []), jobs_map.get(video.id))
)
return {"items": items, "next_cursor": next_cursor}