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from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
import requests
import re
import os
from typing import List, Dict, Optional
from datetime import datetime, timedelta
from auth import get_current_user
router = APIRouter()
# Cache en memoria
m3u_cache = {
"data": None,
"timestamp": None,
"ttl": 3600 # 1 hora
}
class Channel(BaseModel):
id: str
name: str
url: str
logo: Optional[str] = None
category: str
group: Optional[str] = None
class ChannelCategory(BaseModel):
name: str
count: int
class ChannelResponse(BaseModel):
channels: List[Channel]
categories: List[ChannelCategory]
def parse_m3u_content(content: str) -> List[Channel]:
"""Parsea el contenido M3U y extrae los canales"""
channels = []
lines = content.strip().split('\n')
i = 0
while i < len(lines):
line = lines[i].strip()
if line.startswith('#EXTINF:'):
# Extraer información del canal
info_line = line
# Buscar la URL en la siguiente línea
url_line = ""
if i + 1 < len(lines):
url_line = lines[i + 1].strip()
if url_line and not url_line.startswith('#'):
channel = parse_extinf_line(info_line, url_line)
if channel:
channels.append(channel)
i += 2
else:
i += 1
else:
i += 1
return channels
def parse_extinf_line(extinf_line: str, url: str) -> Optional[Channel]:
"""Parsea una línea EXTINF y extrae la información del canal"""
try:
# Extraer nombre del canal (después de la última coma)
name_match = extinf_line.split(',')[-1].strip()
if not name_match:
return None
name = name_match
# Extraer logo
logo_match = re.search(r'tvg-logo="([^"]*)"', extinf_line)
logo = logo_match.group(1) if logo_match else None
# Extraer categoría/grupo
group_match = re.search(r'group-title="([^"]*)"', extinf_line)
category = group_match.group(1) if group_match else "General"
# Generar ID único
channel_id = f"{hash(name + url) % 1000000:06d}"
return Channel(
id=channel_id,
name=name,
url=url,
logo=logo,
category=category,
group=category
)
except Exception as e:
print(f"Error parsing channel: {e}")
return None
def get_cached_channels() -> Optional[List[Channel]]:
"""Obtiene los canales del caché si están vigentes"""
if not m3u_cache["data"] or not m3u_cache["timestamp"]:
return None
# Verificar TTL
if datetime.now() - m3u_cache["timestamp"] > timedelta(seconds=m3u_cache["ttl"]):
return None
return m3u_cache["data"]
def cache_channels(channels: List[Channel]):
"""Guarda los canales en caché"""
m3u_cache["data"] = channels
m3u_cache["timestamp"] = datetime.now()
async def fetch_m3u_playlist() -> List[Channel]:
"""Descarga y parsea la playlist M3U"""
m3u_url = os.getenv("MAIN_M3U_URL")
if not m3u_url:
raise HTTPException(status_code=500, detail="URL de playlist no configurada")
try:
response = requests.get(m3u_url, timeout=30)
response.raise_for_status()
channels = parse_m3u_content(response.text)
cache_channels(channels)
return channels
except requests.RequestException as e:
raise HTTPException(status_code=500, detail=f"Error descargando playlist: {str(e)}")
@router.get("/channels", response_model=ChannelResponse)
async def get_channels(current_user: str = Depends(get_current_user)):
"""Obtiene la lista de canales disponibles"""
# Intentar obtener del caché primero
cached_channels = get_cached_channels()
if cached_channels:
channels = cached_channels
else:
# Descargar y parsear
channels = await fetch_m3u_playlist()
# Agrupar por categorías
categories_dict = {}
for channel in channels:
category = channel.category
if category not in categories_dict:
categories_dict[category] = 0
categories_dict[category] += 1
categories = [
ChannelCategory(name=name, count=count)
for name, count in sorted(categories_dict.items())
]
return ChannelResponse(channels=channels, categories=categories)
@router.get("/playlist.m3u")
async def get_playlist_m3u(current_user: str = Depends(get_current_user)):
"""Devuelve la playlist M3U con URLs reescritas para usar el proxy"""
channels = get_cached_channels()
if not channels:
channels = await fetch_m3u_playlist()
# Generar contenido M3U con URLs proxy
base_url = os.getenv("BASE_URL", "http://localhost:8000")
m3u_content = "#EXTM3U\n"
for channel in channels:
proxy_url = f"{base_url}/api/proxy?url={requests.utils.quote(channel.url, safe='')}"
extinf_line = f'#EXTINF:-1'
if channel.logo:
extinf_line += f' tvg-logo="{channel.logo}"'
if channel.category:
extinf_line += f' group-title="{channel.category}"'
extinf_line += f',{channel.name}\n'
m3u_content += extinf_line
m3u_content += f"{proxy_url}\n"
return PlainTextResponse(
content=m3u_content,
media_type="application/vnd.apple.mpegurl",
headers={"Content-Disposition": "attachment; filename=playlist.m3u"}
) |