snowspeeder
04c4a53594
- web/media_server.py: FastAPI service owning the permanent library (library.json + ./media volume), yt-dlp YouTube Music search, queued download jobs with mp3 transcode (ffmpeg), per-room player desired state, and an HTTPS proxy for external live-stream URLs. - agent/media_mcp.py: Hope tools — search_music, play_song, offer_song_choices, pause/resume/stop/skip/seek, now_playing, list_library, add_stream. - agent/agent.py: media toolset wiring + conversation rule (music playing disables the agent mic; re-engaging pauses music). - web UI: slide-out Music panel (search, suggestions, library, live stream add, play/pause, ±10s, seek, volume) with a reconciling poller and media_state data-channel reports. - token server returns the minted room name; nginx serves /media/files as static (native Range) and proxies /media/api to the media server. - supervisord runs media-server; compose mounts ./media and adds ffmpeg to the image.
620 lines
21 KiB
Python
620 lines
21 KiB
Python
#!/usr/bin/env python3
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"""Media server for the Hope voice assistant.
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A small FastAPI service that owns the permanent music library and player
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coordination:
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- Library: downloaded YouTube Music tracks (mp3, transcoded via yt-dlp +
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ffmpeg) and user-added live audio stream URLs, persisted in library.json.
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- Search: yt-dlp ``ytsearch`` (YouTube Music pages share video ids), used by
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Hope's media MCP toolset and by the web UI search box.
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- Download jobs: one-at-a-time worker thread; progress is parsed from
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yt-dlp stdout and surfaced through GET /media/api/state.
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- Player state: per-room desired state (loaded track, playing/paused/stopped,
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seek hints). The browser is the actual player and reconciles against this;
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it reports real playback state back so Hope's voice tools can answer
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"what's playing".
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Security posture matches the token server: bind 127.0.0.1 only, reachability
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exclusively through the nginx HTTPS proxy (/media/api/). File bytes for
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downloaded tracks are served as nginx static files (/media/files/, native
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HTTP Range support for seeking); this service only proxies external stream
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URLs (mixed-content: an http:// radio URL would be blocked by the browser,
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so it is fetched server-side and re-served over HTTPS).
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"""
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from __future__ import annotations
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import json
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import os
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import re
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import subprocess
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import sys
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import threading
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import time
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import uuid
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from concurrent.futures import ThreadPoolExecutor
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from pathlib import Path
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from typing import Any
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import httpx
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import uvicorn
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from fastapi import FastAPI, HTTPException, Request
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from fastapi.responses import JSONResponse, RedirectResponse, StreamingResponse
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MEDIA_DIR = Path(os.environ.get("MEDIA_DIR", "/data/media"))
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FILES_DIR = MEDIA_DIR / "files"
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THUMBS_DIR = MEDIA_DIR / "thumbs"
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JOBS_DIR = MEDIA_DIR / "jobs"
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LIBRARY_FILE = MEDIA_DIR / "library.json"
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COOKIES_FILE = os.environ.get("YTDLP_COOKIES", "")
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MEDIA_HOST = os.environ.get("MEDIA_SERVER_HOST", "127.0.0.1")
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MEDIA_PORT = int(os.environ.get("MEDIA_SERVER_PORT", "8092"))
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DOWNLOAD_TIMEOUT = int(os.environ.get("MEDIA_DOWNLOAD_TIMEOUT", "600"))
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SEARCH_TIMEOUT = int(os.environ.get("MEDIA_SEARCH_TIMEOUT", "45"))
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app = FastAPI(title="hope-media", docs_url=None, redoc_url=None, openapi_url=None)
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_lock = threading.Lock() # guards library + rooms below
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_library: dict[str, Any] = {"tracks": {}, "version": 1}
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_rooms: dict[str, dict[str, Any]] = {}
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_jobs: dict[str, dict[str, Any]] = {}
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_executor = ThreadPoolExecutor(max_workers=1, thread_name_prefix="media-dl")
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for _d in (FILES_DIR, THUMBS_DIR, JOBS_DIR):
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_d.mkdir(parents=True, exist_ok=True)
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# ── Library store ───────────────────────────────────────────────────────────
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def _load_library() -> None:
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if LIBRARY_FILE.exists():
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try:
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data = json.loads(LIBRARY_FILE.read_text(encoding="utf-8"))
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tracks = data.get("tracks", {})
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if isinstance(tracks, dict):
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_library["tracks"] = tracks
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_library["version"] = int(data.get("version", 1))
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except (json.JSONDecodeError, OSError):
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# Corrupt library: keep the broken file aside, start fresh.
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try:
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LIBRARY_FILE.replace(LIBRARY_FILE.with_suffix(".json.broken"))
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except OSError:
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pass
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def _save_library() -> None:
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tmp = LIBRARY_FILE.with_suffix(".json.tmp")
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tmp.write_text(json.dumps(_library), encoding="utf-8")
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tmp.replace(LIBRARY_FILE)
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def _bump_version() -> int:
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_library["version"] = int(_library.get("version", 1)) + 1
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return _library["version"]
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def _track_dict(track: dict) -> dict:
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out = dict(track)
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if track["kind"] == "youtube":
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if track.get("status") == "ready":
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out["audio_url"] = f"/media/files/{track['id']}.mp3"
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out["art_url"] = (
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f"/media/thumbs/{track['id']}.jpg"
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if (THUMBS_DIR / f"{track['id']}.jpg").exists()
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else None
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)
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else:
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out["audio_url"] = f"/media/api/stream/{track['id']}"
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return out
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def _get_track(track_id: str) -> dict | None:
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return _library["tracks"].get(track_id)
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def _upsert_track(track: dict) -> None:
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_library["tracks"][track["id"]] = track
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_bump_version()
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_save_library()
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_load_library()
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# ── Player state (per room) ─────────────────────────────────────────────────
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def _room_state(room: str) -> dict:
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return _rooms.setdefault(
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room,
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{"track_id": None, "desired": "stopped", "reported": None,
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"seek_hint": None, "choices": []},
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)
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def _room_snapshot(room: str) -> dict:
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st = _room_state(room)
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track = _get_track(st["track_id"]) if st["track_id"] else None
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pending = [
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{
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"job_id": j["id"],
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"track_id": j["track_id"],
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"stage": j["stage"],
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"progress": j["progress"],
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"error": j.get("error"),
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}
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for j in _jobs.values()
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if j["stage"] in ("queued", "downloading", "transcoding")
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]
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return {
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"room": room,
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"track": _track_dict(track) if track else None,
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"desired": st["desired"],
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"reported": st["reported"],
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"seek_hint": st["seek_hint"],
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"choices": st["choices"],
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"pending": pending,
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"version": _library["version"],
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}
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# ── yt-dlp helpers ──────────────────────────────────────────────────────────
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def _ytdlp_base_args() -> list[str]:
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args = [sys.executable, "-m", "yt_dlp", "--no-playlist", "--no-warnings"]
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if COOKIES_FILE and Path(COOKIES_FILE).exists():
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args += ["--cookies", COOKIES_FILE]
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return args
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_PROGRESS_RE = re.compile(r"\[download\]\s+([\d.]+)%")
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def _run_search(query: str, limit: int) -> list[dict]:
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"""Flat ytsearch lookup — cheap, no download, works anonymously."""
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cmd = _ytdlp_base_args() + [
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"--flat-playlist", "--dump-json",
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f"ytsearch{limit}:{query}",
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]
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try:
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proc = subprocess.run(
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cmd, capture_output=True, text=True, timeout=SEARCH_TIMEOUT, check=False
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)
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except subprocess.TimeoutExpired:
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raise HTTPException(504, "YouTube Music search timed out")
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if proc.returncode != 0 and not proc.stdout.strip():
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detail = (proc.stderr or "").strip().splitlines()[-1:] or ["unknown error"]
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raise HTTPException(502, f"Search failed: {detail[0][:300]}")
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results = []
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for line in proc.stdout.splitlines():
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line = line.strip()
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if not line.startswith("{"):
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continue
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try:
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entry = json.loads(line)
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except json.JSONDecodeError:
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continue
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video_id = entry.get("id")
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if not video_id:
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continue
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existing = _get_track(video_id)
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results.append({
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"video_id": video_id,
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"title": entry.get("title") or video_id,
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"channel": entry.get("uploader") or entry.get("channel") or "",
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"duration": entry.get("duration"),
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"view_count": entry.get("view_count"),
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"in_library": bool(existing),
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"track_id": existing["id"] if existing else None,
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"library_status": existing["status"] if existing else None,
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})
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return results
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def _job_dict(job: dict) -> dict:
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return {k: job.get(k) for k in
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("id", "track_id", "stage", "progress", "error", "started_at")}
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def _persist_job(job: dict) -> None:
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try:
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(JOBS_DIR / f"{job['id']}.json").write_text(
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json.dumps(_job_dict(job)), encoding="utf-8"
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)
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except OSError:
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pass
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def _fail_job(job: dict, track: dict, message: str) -> None:
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job["stage"] = "error"
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job["error"] = message[:500]
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_persist_job(job)
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with _lock:
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track["status"] = "failed"
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track["error"] = message[:500]
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_bump_version()
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_save_library()
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def _download_worker(job: dict, track: dict, video_id: str) -> None:
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"""Runs in the single-worker executor: yt-dlp download + mp3 transcode."""
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target = FILES_DIR / f"{track['id']}.mp3"
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cmd = _ytdlp_base_args() + [
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"-f", "bestaudio/best",
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"-x", "--audio-format", "mp3", "--audio-quality", "192K",
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"--embed-thumbnail", "--add-metadata",
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"--write-thumbnail", "--convert-thumbnails", "jpg",
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"--newline", "--progress",
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"--print-json",
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"--retries", "3", "--fragment-retries", "3",
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"-P", str(FILES_DIR),
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"-o", f"{track['id']}.%(ext)s",
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f"https://www.youtube.com/watch?v={video_id}",
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]
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job["stage"] = "downloading"
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info: dict = {}
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try:
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proc = subprocess.Popen(
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cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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text=True, errors="replace",
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)
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deadline = time.monotonic() + DOWNLOAD_TIMEOUT
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assert proc.stdout is not None and proc.stderr is not None
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for line in proc.stdout:
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if time.monotonic() > deadline:
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proc.kill()
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raise RuntimeError(f"Download exceeded {DOWNLOAD_TIMEOUT}s")
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line = line.strip()
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m = _PROGRESS_RE.search(line)
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if m:
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job["progress"] = min(85.0, float(m.group(1)) * 0.85)
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_persist_job(job)
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elif line.startswith(("[ExtractAudio]", "[Metadata]", "[EmbedThumbnail]")):
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job["stage"] = "transcoding"
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job["progress"] = max(job["progress"], 86.0)
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_persist_job(job)
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elif line.startswith("{"):
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try:
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info = json.loads(line)
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except json.JSONDecodeError:
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pass
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proc.wait(timeout=30)
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if proc.returncode != 0:
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stderr_tail = (proc.stderr.read() or "").strip().splitlines()
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detail = stderr_tail[-1] if stderr_tail else f"exit code {proc.returncode}"
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raise RuntimeError(detail)
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if not target.exists():
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raise RuntimeError("yt-dlp finished but no mp3 was produced")
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except Exception as exc: # noqa: BLE001 — any failure marks the track failed
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_fail_job(job, track, str(exc))
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return
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thumb_src = FILES_DIR / f"{track['id']}.jpg"
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try:
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if thumb_src.exists():
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thumb_src.replace(THUMBS_DIR / f"{track['id']}.jpg")
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except OSError:
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pass
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job["stage"] = "ready"
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job["progress"] = 100.0
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_persist_job(job)
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with _lock:
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track["status"] = "ready"
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track["error"] = None
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if info:
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if info.get("title"):
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track["title"] = info["title"]
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if info.get("uploader") or info.get("channel"):
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track["channel"] = info.get("uploader") or info.get("channel")
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if info.get("duration"):
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track["duration"] = round(float(info["duration"]))
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_bump_version()
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_save_library()
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def _start_download(track: dict, video_id: str) -> dict:
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job = {
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"id": uuid.uuid4().hex[:12],
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"track_id": track["id"],
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"stage": "queued",
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"progress": 0.0,
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"error": None,
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"started_at": time.time(),
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}
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_jobs[job["id"]] = job
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_persist_job(job)
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_executor.submit(_download_worker, job, track, video_id)
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return job
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# ── API: health, library ────────────────────────────────────────────────────
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@app.get("/media/api/healthz")
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def healthz() -> dict:
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return {"ok": True, "version": _library["version"]}
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@app.get("/media/api/library")
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def get_library() -> dict:
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with _lock:
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tracks = sorted(
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(_track_dict(t) for t in _library["tracks"].values()),
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key=lambda t: t.get("added_at", 0),
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reverse=True,
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)
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return {"tracks": tracks, "version": _library["version"]}
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def _delete_track_files(track: dict) -> None:
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if track["kind"] != "youtube":
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return
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for path in (
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FILES_DIR / f"{track['id']}.mp3",
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FILES_DIR / f"{track['id']}.jpg",
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THUMBS_DIR / f"{track['id']}.jpg",
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):
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try:
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path.unlink(missing_ok=True)
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except OSError:
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pass
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@app.delete("/media/api/tracks/{track_id}")
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def delete_track(track_id: str) -> dict:
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with _lock:
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track = _get_track(track_id)
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if not track:
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raise HTTPException(404, "unknown track")
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del _library["tracks"][track_id]
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_bump_version()
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_save_library()
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for room, st in _rooms.items():
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if st["track_id"] == track_id:
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st["track_id"] = None
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st["desired"] = "stopped"
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_delete_track_files(track)
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return {"ok": True}
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# ── API: search + play + control ────────────────────────────────────────────
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@app.post("/media/api/search")
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async def search(request: Request) -> dict:
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body = await request.json()
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query = str(body.get("query", "")).strip()
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if not query:
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raise HTTPException(400, "query is required")
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limit = max(1, min(int(body.get("limit", 6)), 15))
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return {"query": query, "results": _run_search(query, limit)}
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def _resolve_play_target(body: dict) -> dict:
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"""Find or create the track a play request refers to.
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Accepts video_id (YouTube), track_id (existing library entry) or a raw
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url+name (live stream). Returns the library track dict.
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"""
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video_id = str(body.get("video_id") or "").strip()
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track_id = str(body.get("track_id") or "").strip()
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url = str(body.get("url") or "").strip()
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if video_id:
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existing = _get_track(video_id)
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if existing:
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return existing
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track = {
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"id": video_id,
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"kind": "youtube",
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"video_id": video_id,
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"title": str(body.get("title") or video_id),
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"channel": str(body.get("channel") or ""),
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"duration": body.get("duration"),
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"status": "downloading",
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"error": None,
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"added_at": time.time(),
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}
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_upsert_track(track)
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_start_download(track, video_id)
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return track
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if track_id:
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track = _get_track(track_id)
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if not track:
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raise HTTPException(404, "unknown track")
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return track
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if url:
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if not re.match(r"^https?://", url):
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raise HTTPException(400, "url must be http(s)")
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track_id = "s" + uuid.uuid4().hex[:10]
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track = {
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"id": track_id,
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"kind": "stream",
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"video_id": None,
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"title": str(body.get("name") or url),
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"channel": str(body.get("channel") or ""),
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"duration": None,
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"status": "ready",
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"error": None,
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"url": url,
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"added_at": time.time(),
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}
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_upsert_track(track)
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return track
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raise HTTPException(400, "one of video_id, track_id or url is required")
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@app.post("/media/api/play")
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async def play(request: Request) -> dict:
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body = await request.json()
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room = str(body.get("room") or "default")
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track = _resolve_play_target(body)
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with _lock:
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st = _room_state(room)
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st["track_id"] = track["id"]
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# start_paused carries a track into a new scope without starting it —
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# the UI uses this when a conversation begins (talking pauses music).
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st["desired"] = "paused" if body.get("start_paused") else "playing"
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st["choices"] = [] # a pick resolves any open suggestion list
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st["seek_hint"] = None
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snapshot = _room_snapshot(room)
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return {"ok": True, **snapshot}
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@app.post("/media/api/control")
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async def control(request: Request) -> dict:
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body = await request.json()
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room = str(body.get("room") or "default")
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action = str(body.get("action") or "")
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with _lock:
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st = _room_state(room)
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if action == "pause":
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st["desired"] = "paused"
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elif action == "resume":
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if not st["track_id"]:
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raise HTTPException(409, "nothing loaded")
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st["desired"] = "playing"
|
|
elif action == "stop":
|
|
st["desired"] = "stopped"
|
|
elif action == "seek":
|
|
st["seek_hint"] = {
|
|
"position": max(0.0, float(body.get("position", 0))),
|
|
"ts": time.time(),
|
|
}
|
|
elif action == "skip":
|
|
current = st["track_id"]
|
|
candidates = sorted(
|
|
(
|
|
t for t in _library["tracks"].values()
|
|
if t.get("status") == "ready" and t["id"] != current
|
|
),
|
|
key=lambda t: t.get("added_at", 0),
|
|
reverse=True,
|
|
)
|
|
if candidates:
|
|
st["track_id"] = candidates[0]["id"]
|
|
st["desired"] = "playing"
|
|
st["seek_hint"] = None
|
|
else:
|
|
st["desired"] = "stopped"
|
|
else:
|
|
raise HTTPException(400, f"unknown action: {action}")
|
|
snapshot = _room_snapshot(room)
|
|
return {"ok": True, **snapshot}
|
|
|
|
|
|
@app.post("/media/api/choices")
|
|
async def choices(request: Request) -> dict:
|
|
"""Publish Hope's song suggestions so the UI can render clickable picks."""
|
|
body = await request.json()
|
|
room = str(body.get("room") or "default")
|
|
raw = body.get("choices") or []
|
|
cleaned = []
|
|
for c in raw[:5]:
|
|
if not isinstance(c, dict) or not c.get("video_id"):
|
|
continue
|
|
cleaned.append({
|
|
"video_id": str(c["video_id"]),
|
|
"title": str(c.get("title") or c["video_id"]),
|
|
"channel": str(c.get("channel") or ""),
|
|
"duration": c.get("duration"),
|
|
})
|
|
with _lock:
|
|
_room_state(room)["choices"] = cleaned
|
|
return {"ok": True, "choices": cleaned}
|
|
|
|
|
|
@app.get("/media/api/state")
|
|
def state(room: str = "default") -> dict:
|
|
with _lock:
|
|
return _room_snapshot(room)
|
|
|
|
|
|
@app.post("/media/api/report")
|
|
async def report(request: Request) -> dict:
|
|
"""The browser reports real playback state (source of truth for the player)."""
|
|
body = await request.json()
|
|
room = str(body.get("room") or "default")
|
|
with _lock:
|
|
st = _room_state(room)
|
|
st["reported"] = {
|
|
"track_id": body.get("track_id"),
|
|
"state": str(body.get("state") or "stopped"),
|
|
"position": float(body.get("position") or 0.0),
|
|
"duration": body.get("duration"),
|
|
"ts": time.time(),
|
|
}
|
|
return {"ok": True}
|
|
|
|
|
|
@app.post("/media/api/streams")
|
|
async def add_stream(request: Request) -> dict:
|
|
body = await request.json()
|
|
track = _resolve_play_target({"url": body.get("url"), "name": body.get("name")})
|
|
return {"ok": True, "track": _track_dict(track)}
|
|
|
|
|
|
# ── API: stream proxy (external http(s) audio over same-origin HTTPS) ───────
|
|
|
|
_HOP_HEADERS = ("content-type", "content-range", "accept-ranges", "content-length")
|
|
|
|
|
|
@app.get("/media/api/stream/{track_id}")
|
|
async def stream_proxy(track_id: str, request: Request):
|
|
with _lock:
|
|
track = _get_track(track_id)
|
|
if not track:
|
|
raise HTTPException(404, "unknown track")
|
|
if track["kind"] == "youtube":
|
|
# Downloaded tracks are nginx static files (native Range support).
|
|
if track.get("status") == "ready":
|
|
return RedirectResponse(f"/media/files/{track_id}.mp3")
|
|
raise HTTPException(409, f"track is {track.get('status')}, not ready")
|
|
|
|
range_header = request.headers.get("range")
|
|
headers = {"Range": range_header} if range_header else {"Range": "bytes=0-"}
|
|
client = httpx.AsyncClient(timeout=httpx.Timeout(30, read=600), follow_redirects=True)
|
|
try:
|
|
upstream = await client.send(client.build_request("GET", track["url"], headers=headers), stream=True)
|
|
except httpx.HTTPError as exc:
|
|
await client.aclose()
|
|
raise HTTPException(502, f"upstream stream failed: {exc}")
|
|
|
|
if upstream.status_code >= 400:
|
|
await upstream.aclose()
|
|
await client.aclose()
|
|
raise HTTPException(502, f"upstream returned {upstream.status_code}")
|
|
|
|
out_headers = {
|
|
name: value
|
|
for name, value in upstream.headers.items()
|
|
if name.lower() in _HOP_HEADERS
|
|
}
|
|
media_type = upstream.headers.get("content-type", "audio/mpeg")
|
|
|
|
async def relay():
|
|
try:
|
|
async for chunk in upstream.aiter_bytes(64 * 1024):
|
|
yield chunk
|
|
finally:
|
|
await upstream.aclose()
|
|
await client.aclose()
|
|
|
|
return StreamingResponse(
|
|
relay(),
|
|
status_code=upstream.status_code,
|
|
media_type=media_type,
|
|
headers=out_headers,
|
|
)
|
|
|
|
|
|
@app.exception_handler(HTTPException)
|
|
async def http_error(_request: Request, exc: HTTPException):
|
|
return JSONResponse({"error": exc.detail}, status_code=exc.status_code)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
uvicorn.run(app, host=MEDIA_HOST, port=MEDIA_PORT, log_level="info")
|