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"""Get the site emails from URL."""

from __future__ import annotations

__author__ = "Muhammad Umer Farooq"

__license__ = "MIT"

__version__ = "1.0.0"

__maintainer__ = "Muhammad Umer Farooq"

__email__ = "contact@muhammadumerfarooq.me"

__status__ = "Alpha"

import re

from html.parser import HTMLParser

from urllib import parse

import requests

class Parser(HTMLParser):

def __init__(self, domain: str) -> None:

super().__init__()

self.urls: list[str] = []

self.domain = domain

def handle_starttag(self, tag: str, attrs: list[tuple[str, str | None]]) -> None:

"""

This function parse html to take takes url from tags

"""

# Only parse the 'anchor' tag.

if tag == "a":

# Check the list of defined attributes.

for name, value in attrs:

# If href is defined, not empty nor # print it and not already in urls.

if name == "href" and value not in (*self.urls, "", "#"):

url = parse.urljoin(self.domain, value)

self.urls.append(url)

# Get main domain name (example.com)

def get_domain_name(url: str) -> str:

"""

This function get the main domain name

>>> get_domain_name("https://a.b.c.d/e/f?g=h,i=j#k")

'c.d'

>>> get_domain_name("Not a URL!")

"""

return ".".join(get_sub_domain_name(url).split(".")[-2:])

# Get sub domain name (sub.example.com)

def get_sub_domain_name(url: str) -> str:

"""

>>> get_sub_domain_name("https://a.b.c.d/e/f?g=h,i=j#k")

'a.b.c.d'

>>> get_sub_domain_name("Not a URL!")

"""

return parse.urlparse(url).netloc

def emails_from_url(url: str = "https://github.com") -> list[str]:

"""

This function takes url and return all valid urls

"""

# Get the base domain from the url

domain = get_domain_name(url)

# Initialize the parser

parser = Parser(domain)

try:

# Open URL

r = requests.get(url, timeout=10)

# pass the raw HTML to the parser to get links

parser.feed(r.text)

# Get links and loop through

valid_emails = set()

for link in parser.urls:

# open URL.

# read = requests.get(link)

try:

read = requests.get(link, timeout=10)

# Get the valid email.

emails = re.findall("[a-zA-Z0-9]+@" + domain, read.text)

# If not in list then append it.

for email in emails:

valid_emails.add(email)

except ValueError:

pass

except ValueError:

raise SystemExit(1)

# Finally return a sorted list of email addresses with no duplicates.

return sorted(valid_emails)

if __name__ == "__main__":

emails = emails_from_url("https://github.com")

print(f"{len(emails)} emails found:")

print("\n".join(sorted(emails)))

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