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import re
import httpx
from functools import reduce
from typing import List, Iterator, Union
from xml.etree.ElementTree import ElementTree, fromstring, tostring, register_namespace
from flask import Flask, Response, request
app = Flask(__name__)
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]+ -",
}
ATOM = "http://www.w3.org/2005/Atom"
ITUNES = "http://www.itunes.com/dtds/podcast-1.0.dtd"
GOOGLEPLAY = "http://www.google.com/schemas/play-podcasts/1.0"
register_namespace("googleplay", GOOGLEPLAY)
register_namespace("itunes", ITUNES)
register_namespace("atom", ATOM)
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], tag: Union[bool, None] = False) -> str:
tree = ElementTree(fromstring(xml_str))
tree_root = tree.getroot()
for channel in tree_root.findall("./channel"):
if tag:
tag = f' [{",".join(series)}]'.upper()
channel.find("title").text += tag
channel.find("description").text += tag
channel.find("link").text += f"?{tag}"
channel.find(f"{{{ITUNES}}}author").text += tag
channel.find(f"{{{GOOGLEPLAY}}}author").text += tag
channel.find(f"{{{ITUNES}}}subtitle").text += tag
channel.find(f"{{{ITUNES}}}summary").text += tag
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
def load_and_filter(series: str, tag: Union[bool, None] = False) -> str:
series = series or 'nerdcast'
series = series.split(',')
with httpx.Client() as client:
response =client.get(URL)
xml_str = response.content
return filter_xml(xml_str, series, tag)
def load_titles() -> Iterator[str]:
with httpx.Client() as client:
response = client.get(URL)
xml_str = response.content
return filter_titles_xml(xml_str)
@app.route("/", methods=['GET', 'HEAD'])
def root(q: str = '', tag: Union[bool, None] = False):
q = request.args.get("q", "")
tag = request.args.get("tag", False)
return load_and_filter(q, tag), 200, {'Content-Type': 'application/xml'}
@app.route("/titles", methods=['GET'])
def titles():
titles = load_titles()
return "\n".join(titles)
@app.route("/series", methods=['GET'])
def series():
return [i[0] for i in RegexCollection.items()]
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