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import re
from functools import reduce
from typing import List, Iterator
from xml.etree.ElementTree import ElementTree, fromstring, tostring, register_namespace
import httpx
from fastapi import FastAPI
from starlette.responses import Response, PlainTextResponse
app = FastAPI()
URL = "https://jovemnerd.com.br/feed-nerdcast/"
RegexCollection = {
"nerdcast": "NerdCast [0-9]+[a-c]* -",
"empreendedor": "Empreendedor [0-9]+ -",
"mamicas": "Caneca de Mamicas [0-9]+ -",
"english": "Speak English [0-9]+ -",
"nerdcash": "NerdCash [0-9]+ -",
"bunker": "Lá do Bunker [0-9]+ -",
"tech": "NerdTech [0-9]+ -",
"genera": "Generacast [0-9]+ -",
}
register_namespace("googleplay", "http://www.google.com/schemas/play-podcasts/1.0")
register_namespace("itunes", "http://www.itunes.com/dtds/podcast-1.0.dtd")
register_namespace("atom", "http://www.w3.org/2005/Atom")
class XMLResponse(Response):
media_type = "application/xml"
def match(title: str, series: List[str]) -> bool:
def _match(s):
return re.match(RegexCollection[s], title) is not None
return reduce(lambda x, y: x or _match(y), series, False)
def filter_xml(xml_str: str, series: List[str]) -> str:
tree = ElementTree(fromstring(xml_str))
tree_root = tree.getroot()
for channel in tree_root.findall("./channel"):
for item in channel.findall("item"):
title = item.find("title").text
if not match(title, series):
channel.remove(item)
return tostring(tree_root, encoding='utf8', method='xml')
def filter_titles_xml(xml_str) -> Iterator[str]:
tree = ElementTree(fromstring(xml_str))
tree_root = tree.getroot()
for item in tree_root.findall("./channel/item"):
yield item.find("title").text
async def load_and_filter(series: str) -> str:
series = series or 'nerdcast'
series = series.split(',')
async with httpx.AsyncClient() as client:
response = await client.get(URL)
xml_str = response.content
return filter_xml(xml_str, series)
async def load_titles() -> Iterator[str]:
async with httpx.AsyncClient() as client:
response = await client.get(URL)
xml_str = response.content
return filter_titles_xml(xml_str)
@app.head("/")
@app.get("/", response_class=XMLResponse)
async def root(q: str = ''):
return await load_and_filter(q)
@app.get("/titles", response_class=PlainTextResponse)
async def titles():
titles = await load_titles()
return "\n".join(titles)
@app.get("/series")
async def titles():
return [i[0] for i in RegexCollection.items()]
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