73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
from typing import Optional
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from idna.core import IDNAError, encode
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from .exceptions import AddressFormatError
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class EmailAddress(object):
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"""
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Internally used class to hold an email address.
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This class featuers splitting the email address into user and domain
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part as well as converting internationalized domain name into the
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ASCII-compatible encoding (ACE) according to the IDNA standard.
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"""
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def __init__(self, address: str):
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self._address = address
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# Split email address into user and domain part.
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try:
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self._user, self._domain = self._address.rsplit('@', 1)
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except ValueError:
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raise AddressFormatError
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# Convert internationalized domain name into the ACE encoding
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if self.domain_literal_ip:
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self._ace_domain = self._domain
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else:
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try:
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self._ace_domain = encode(self._domain).decode('ascii')
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except IDNAError:
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raise AddressFormatError
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@property
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def user(self) -> str:
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"""
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The username part of the email address, that is the part before
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the "@" sign.
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"""
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return self._user
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@property
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def domain(self) -> str:
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"""
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The domain part of the email address, that is the part after the
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"@" sign.
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"""
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return self._domain
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@property
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def domain_literal_ip(self) -> Optional[str]:
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"""
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If the domain part of the email address is a literal IP address
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enclosed in brackets, that IP address (without the brakcets) is
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returned. Otherwise, `None` is returned.
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"""
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if self._domain.startswith('[') and self._domain.endswith(']'):
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return self._domain[1:-1]
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@property
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def ace(self) -> str:
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'The ASCII-compatible encoding for the email address.'
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return '@'.join((self._user, self._ace_domain))
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@property
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def ace_domain(self) -> str:
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"""
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The ASCII-compatible encoding for the domain part of the email
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address.
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"""
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return self._ace_domain
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