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# This file is released under the GNU GPL, version 3 or a later revision.
# For further details see the COPYING file
import email.policy
from email.utils import getaddresses, parseaddr
from enum import Enum, auto
import logging
from . import headers as HDR
from ..helper import formataddr
from ..settings.const import settings
ACT_REPLY = 'reply'
ACT_BOUNCE = 'bounce'
ACT_FWD = 'forward'
def determine_account(headers, action = ACT_REPLY):
"""
Determine the local account to use for acting on a message with the given
headers.
:param headers: headers of the email to inspect
:type headers: `db.message._MessageHeaders`
:param action: intended use case: one of the ACT_* constants
:type action: str
:returns: 2-tuple of (from address, account)
"""
# get accounts
my_accounts = settings.get_accounts()
assert my_accounts, 'no accounts set!'
# extract list of addresses to check for my address
# X-Envelope-To and Envelope-To are used to store the recipient address
# if not included in other fields
# Process the headers in order of importance: if a mail was sent with
# account X, with account Y in e.g. CC or delivered-to, make sure that
# account X is the one selected and not account Y.
for candidate_header in settings.get("reply_account_header_priority"):
candidate_addresses = getaddresses(headers.get_all(candidate_header))
logging.debug('candidate addresses: %s', candidate_addresses)
# pick the most important account that has an address in candidates
# and use that account's realname and the address found here
for account in my_accounts:
for seen_name, seen_address in candidate_addresses:
if account.matches_address(seen_address):
if settings.get(action + '_force_realname'):
realname = account.realname
else:
realname = seen_name
if settings.get(action + '_force_address'):
address = str(account.address)
else:
address = seen_address
logging.debug('using realname: "%s"', realname)
logging.debug('using address: %s', address)
from_value = formataddr((realname, address))
return from_value, account
# revert to default account if nothing found
account = my_accounts[0]
realname = account.realname
address = account.address
logging.debug('using realname: "%s"', realname)
logging.debug('using address: %s', address)
from_value = formataddr((realname, str(address)))
return from_value, account
class ReplyMode(Enum):
AUTHOR = auto()
GROUP = auto()
LIST = auto()
def _ensure_unique_address(recipients):
"""
clean up a list of name,address pairs so that
no address appears multiple times.
"""
res = dict()
for name, address in getaddresses(recipients):
res[address] = name
logging.debug(res)
urecipients = [formataddr((n, a)) for a, n in res.items()]
return sorted(urecipients)
def _clear_my_address(my_account, value):
"""return recipient header without the addresses in my_account
:param my_account: my account
:type my_account: :class:`Account`
:param value: a list of recipient or sender strings (with or without
real names as taken from email headers)
:type value: list(str)
:returns: a new, potentially shortend list
:rtype: list(str)
"""
new_value = []
for name, address in getaddresses(value):
if not my_account.matches_address(address):
new_value.append(formataddr((name, address)))
return new_value
def determine_recipients(message, account, mode):
# set To
sender = (message.headers.get(HDR.REPLY_TO) or
message.headers.get(HDR.FROM) or '')
sender_address = parseaddr(sender)[1]
cc = []
# check if reply is to self sent message
if account.matches_address(sender_address):
recipients = message.headers.get_all(HDR.TO)
emsg = 'Replying to own message, set recipients to: %s' \
% recipients
logging.debug(emsg)
else:
recipients = [sender]
if mode == ReplyMode.GROUP:
# make sure that our own address is not included
# if the message was self-sent, then our address is not included
MFT = message.headers.get_all(HDR.MAIL_FOLLOWUP_TO)
followupto = _clear_my_address(account, MFT)
if followupto and settings.get('honor_followup_to'):
logging.debug('honor followup to: %s', ', '.join(followupto))
recipients = followupto
# since Mail-Followup-To was set, ignore the Cc header
else:
if sender != message.headers.get(HDR.FROM):
recipients.append(message.headers.get(HDR.FROM))
# append To addresses if not replying to self sent message
if not account.matches_address(sender_address):
cleared = _clear_my_address(account,
message.headers.get_all(HDR.TO))
recipients.extend(cleared)
# copy cc for group-replies
if HDR.CC in message.headers:
cc = _clear_my_address(account, message.headers.get_all(HDR.CC))
to = ', '.join(_ensure_unique_address(recipients))
cc = ', '.join(cc)
logging.debug('reply to: %s', to)
if mode == ReplyMode.LIST:
# To choose the target of the reply --list
# Reply-To is standart reply target RFC 2822:, RFC 1036: 2.2.1
# X-BeenThere is needed by sourceforge ML also winehq
# X-Mailing-List is also standart and is used by git-send-mail
to = (message.headers.get(HDR.REPLY_TO) or
message.headers.get(HDR.X_BEEN_THERE) or
message.headers.get(HDR.X_MAILING_LIST))
# Some mail server (gmail) will not resend you own mail, so you
# have to deal with the one in sent
if to is None:
to = message.headers[HDR.TO]
logging.debug('mail list reply to: %s', to)
return to, cc
def subject(message):
subject = message.headers.get(HDR.SUBJECT) or ''
reply_subject_hook = settings.get_hook('reply_subject')
if reply_subject_hook:
subject = reply_subject_hook(subject)
else:
rsp = settings.get('reply_subject_prefix')
if not subject.lower().startswith(('re:', rsp.lower())):
subject = rsp + subject
return subject
def body_text(message, ui):
name, address = message.get_author()
timestamp = message.date
qf = settings.get_hook('reply_prefix')
if qf:
mail = email.message_from_bytes(message.as_bytes(),
policy = email.policy.SMTP)
quotestring = qf(name, address, timestamp,
message=mail, ui=ui, dbm=ui.dbman)
else:
quotestring = 'Quoting %s (%s)\n' % (name or address, timestamp)
mailcontent = quotestring
quotehook = settings.get_hook('text_quote')
if quotehook:
mailcontent += quotehook(message.get_body_text())
else:
quote_prefix = settings.get('quote_prefix')
for line in message.get_body_text().splitlines():
mailcontent += quote_prefix + line + '\n'
return mailcontent
def references(message):
old_references = message.headers.get(HDR.REFERENCES)
references = []
if old_references:
references = old_references.split()
# limit to 16 references, including the one we add
del references[1:-14]
references.append('<%s>' % message.id)
return ' '.join(references)
def mail_followup_to(recipients):
if not settings.get('followup_to'):
return None
lists = settings.get('mailinglists')
# check if any recipient address matches a known mailing list
if any(addr in lists for n, addr in getaddresses(recipients)):
followupto = ', '.join(recipients)
logging.debug('mail followup to: %s', followupto)
return followupto
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