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#!/usr/bin/env python3
#
# Send the Daily Bulletin the next morning
# Copyright (C) 2024 Runxi Yu <https://runxiyu.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
# **TODO:** Send MIME rather than JSON
#
from __future__ import annotations
import os
import datetime
import zoneinfo
import argparse
from configparser import ConfigParser
from typing import Optional
import msal # type: ignore
import requests
def acquire_token(app: msal.PublicClientApplication, config: ConfigParser) -> str:
result = app.acquire_token_by_username_password(
config["credentials"]["username"],
config["credentials"]["password"],
scopes=config["credentials"]["scope"].split(" "),
)
if "access_token" in result:
assert isinstance(result["access_token"], str)
return result["access_token"]
raise ValueError("Authentication error in password login")
def sendmail(
token: str,
subject: str,
body: str,
to: list[str],
bcc: list[str],
cc: list[str],
when: Optional[datetime.datetime] = None,
content_type: str = "HTML",
importance: str = "Normal",
) -> None:
data = {
"subject": subject,
"importance": importance,
"body": {"contentType": content_type, "content": body},
"toRecipients": [{"emailAddress": {"address": a}} for a in to],
"ccRecipients": [{"emailAddress": {"address": a}} for a in cc],
"bccRecipients": [{"emailAddress": {"address": a}} for a in bcc],
}
if when is not None:
if when.tzinfo is None:
raise TypeError("Naive datetimes are no longer supported")
utcwhen = when.astimezone(datetime.timezone.utc)
isoval = utcwhen.isoformat(timespec="seconds").replace("+00:00", "Z")
data["singleValueExtendedProperties"] = [{"id": "SystemTime 0x3FEF", "value": isoval}]
response = requests.post(
"https://graph.microsoft.com/v1.0/me/messages",
json=data,
headers={"Authorization": "Bearer " + token},
timeout=20,
).json()
response2 = requests.post(
"https://graph.microsoft.com/v1.0/me/messages/%s/send" % response["id"],
headers={"Authorization": "Bearer " + token},
timeout=20,
)
if response2.status_code != 202:
print(response2.content)
raise ValueError(
"Graph response to messages/%s/send returned something other than 202 Accepted" % response["id"],
response2,
)
# TODO: Handle more errors
def main() -> None:
parser = argparse.ArgumentParser(description="Daily Bulletin Sender")
parser.add_argument(
"--date",
default=None,
help="the date of the bulletin to send, in local time, in YYYY-MM-DD; defaults to tomorrow",
)
parser.add_argument("--config", default="config.ini", help="path to the configuration file")
args = parser.parse_args()
config = ConfigParser()
config.read(args.config)
if args.date:
date = datetime.datetime.strptime(args.date, "%Y-%m-%d").replace(tzinfo=zoneinfo.ZoneInfo(config["general"]["timezone"]))
else:
date = datetime.datetime.now(zoneinfo.ZoneInfo(config["general"]["timezone"])) + datetime.timedelta(days=1)
os.chdir(config["general"]["build_path"])
html_filename = "sjdb-%s.html" % date.strftime("%Y%m%d")
with open(html_filename, "r", encoding="utf-8") as html_fd:
html = html_fd.read()
app = msal.PublicClientApplication(
config["credentials"]["client_id"],
authority=config["credentials"]["authority"],
)
token = acquire_token(app, config)
common = {
"when": date.replace(
hour=int(config["sendmail"]["hour"]),
minute=int(config["sendmail"]["minute"]),
second=0,
microsecond=0,
),
"content_type": "HTML",
"importance": "Normal",
"subject": config["sendmail"]["subject_format"] % date.strftime(config["sendmail"]["subject_date_format"]),
"body": html,
}
sendmail(
token,
to=config["sendmail"]["to_1"].split(" "),
cc=config["sendmail"]["cc_1"].split(" "),
bcc=config["sendmail"]["bcc_1"].split(" "),
**common, # type: ignore
)
sendmail(
token,
to=config["sendmail"]["to_2"].split(" "),
cc=config["sendmail"]["cc_2"].split(" "),
bcc=config["sendmail"]["bcc_2"].split(" "),
**common, # type: ignore
)
if __name__ == "__main__":
main()
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