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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Send emails according to a CSV input with fields and templating support.
#
# Copyright (C) 2022 Silvio Rhatto <rhatto@riseup.net>
#
# 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 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/>.
# Dependencies
import argparse
import csv
import sys, os, subprocess
class MinimailerCSV:
"""Send emails according to a CSV input with fields and templating support"""
def __init__(self, args):
self.args = args
self.data = []
if os.path.exists(args.template_file[0]):
with open(args.template_file[0], 'r') as template_file:
self.template = template_file.read()
else:
raise FileNotFoundError('No such file ' + template_file)
if os.path.exists(args.csv_file[0]):
with open(args.csv_file[0], newline='') as csv_file:
self.csv = csv.DictReader(csv_file,
delimiter=args.delimiter,
quotechar=args.quotechar,
)
for row in self.csv:
self.data.append(row)
else:
raise FileNotFoundError('No such file ' + csv_file)
def send(self):
for item in self.data:
print('sending message to {}'.format(item[self.args.recipient_field_address]))
message = self.template.format(**item)
with subprocess.Popen('{sendmail} {recipient}'.format(
message=message,
sendmail=self.args.sendmail_command,
recipient=item[self.args.recipient_field_address],
), text=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, shell=True) as proc:
proc.stdin.write(message)
proc.stdin.close()
if __name__ == "__main__":
"""Process from CLI"""
epilog = """Examples:
minimailer-csv message.tmpl data.csv --sendmail-command 'msmtp -a default'
minimailer-csv message.tmpl data.csv --recipient-field-address 'contact'
"""
description = 'Send emails according to a CSV input with fields and templating support'
parser = argparse.ArgumentParser(
description=description,
epilog=epilog,
formatter_class=argparse.RawDescriptionHelpFormatter,
)
parser.add_argument('template_file', nargs=1, help='Message template filename')
parser.add_argument('csv_file', nargs=1, help='CSV filename. It\'s required that the first line in the CSV contain the field names.')
#parser.add_argument('mstmp_account_name', nargs='?', help='MSTMP account name')
# Defaults
sendmail_command_default = '/usr/bin/msmtp -a default'
recipiend_field_address_default = 'email'
delimiter_default = ','
quotechar_default = '"'
parser.add_argument(
'--sendmail-command',
help='Sendmail command invocation. Defaults to ' + sendmail_command_default
)
parser.add_argument(
'--recipient-field-address',
help='Email address field in the CSV file. Defaults to ' + recipiend_field_address_default
)
parser.add_argument(
'--delimiter',
help='CSV field delimiter. Defaults to' + delimiter_default,
)
parser.add_argument(
'--quotechar',
help='CSV quotechar. Defaults to' + quotechar_default,
)
# Set defaults
#parser.set_defaults(msmtp_account_name='default')
parser.set_defaults(sendmail_command=sendmail_command_default)
parser.set_defaults(recipiend_field_address=recipiend_field_address_default)
parser.set_defaults(delimiter=delimiter_default)
parser.set_defaults(quotechar=quotechar_default)
args = parser.parse_args()
# Dispatch
try:
mailer = MinimailerCSV(args)
mailer.send()
except (FileNotFoundError, KeyboardInterrupt, subprocess.SubprocessError) as e:
print(e)
exit(1)
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