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# Copyright 2017 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import email
def get_ids_from_message(msg):
return set(_yield_ids(msg))
def _yield_ids(msg):
header_names = ('Message-Id', 'In-Reply-To', 'References')
for header_name in header_names:
for msg_id in _yield_ids_from_header(msg, header_name):
yield msg_id
def _yield_ids_from_header(msg, header_name):
values = msg.get_all(header_name)
if values:
for _, msg_id in email.utils.getaddresses(values):
yield msg_id
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