#!/usr/bin/python

from defusedxml.ElementTree import fromstring
import urllib.request
import datetime
import os

os.chdir("/srv/http/dukun.de/xox/ZanderZeichen/")

# rss-xml URL
url = "https://www1.wdr.de/mediathek/audio/zeitzeichen/zeitzeichen-podcast-100.podcast"

def findZander(today):
    """
    """
    # find metadata
    for n, item in enumerate(today):
        if item.tag.find("title") >= 0:
            title = today[n].text
        if item.tag.find("author") >= 0:
            author = today[n].text
        if item.tag.find("enclosure") >= 0:
            podcasturl = today[n].attrib["url"]

    # check for Zander
    if author.find("Zander") >= 0:
        print(f"ZanderAlert: {title}\nDownload-URL: {podcasturl}")
        return {"url": podcasturl, "title": title, "full_item": today}
    return None

# read rss feed
with urllib.request.urlopen(url) as response:
    assert response.status == 200, f"Webrequest fehlgeschlagen, stimmt die URL noch?"
    feed = fromstring(response.read())[0]

# read entries in rss feed until first entry (today)
for i in feed:
    if i.tag == "item":
        metadata = findZander(i)
        break

# download episode download and regenerate zanderzeichen feed
if metadata is not None:
    day, month, year = datetime.datetime.now().strftime("%d.%m.%Y").split(".")
    title = metadata["title"]
    for i in (",", "(", ")"):   # get rid of unwanted characters in title
        title = title.replace(i, "")
    refdate = title.split(" ")[-1].replace(".", "") # generate reference date
    title = " ".join(title.split(" ")[:-1]) # strip reference date

    # destination file name
    destination = f"files/wdrzeitzeichen_{year}-{month}-{day}_{title}_{refdate}_wdr5.mp3"
    # actual download of file
    urllib.request.urlretrieve(metadata["url"], destination)

    # regenerate zanderzeichen feed
    import genfeed