394 lines
14 KiB
Python
394 lines
14 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from twisted.mail.smtp import sendmail
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import email.utils
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import email.mime.multipart
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from email.mime.text import MIMEText
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from email.mime.multipart import MIMEMultipart
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from synapse.util.async import concurrently_execute
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from synapse.util.presentable_names import (
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calculate_room_name, name_from_member_event, descriptor_from_member_events
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)
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from synapse.types import UserID
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from synapse.api.errors import StoreError
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import jinja2
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import bleach
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import time
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import urllib
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MESSAGE_FROM_PERSON_IN_ROOM = "You have a message from %(person)s in the %s room"
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MESSAGE_FROM_PERSON = "You have a message from %(person)s"
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MESSAGES_FROM_PERSON = "You have messages from %(person)s"
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MESSAGES_IN_ROOM = "There are some messages for you in the %(room)s room"
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MESSAGES_IN_ROOMS = "Here are some messages you may have missed"
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INVITE_FROM_PERSON_TO_ROOM = "%(person)s has invited you to join the %(room)s room"
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INVITE_FROM_PERSON = "%(person)s has invited you to chat"
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CONTEXT_BEFORE = 1
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# From https://github.com/matrix-org/matrix-react-sdk/blob/master/src/HtmlUtils.js
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ALLOWED_TAGS = [
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'font', # custom to matrix for IRC-style font coloring
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'del', # for markdown
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# deliberately no h1/h2 to stop people shouting.
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'h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol',
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'nl', 'li', 'b', 'i', 'u', 'strong', 'em', 'strike', 'code', 'hr', 'br', 'div',
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'table', 'thead', 'caption', 'tbody', 'tr', 'th', 'td', 'pre'
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]
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ALLOWED_ATTRS = {
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# custom ones first:
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"font": ["color"], # custom to matrix
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"a": ["href", "name", "target"], # remote target: custom to matrix
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# We don't currently allow img itself by default, but this
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# would make sense if we did
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"img": ["src"],
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}
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# When bleach release a version with this option, we can specify schemes
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# ALLOWED_SCHEMES = ["http", "https", "ftp", "mailto"]
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class Mailer(object):
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def __init__(self, hs):
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self.hs = hs
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self.store = self.hs.get_datastore()
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self.state_handler = self.hs.get_state_handler()
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loader = jinja2.FileSystemLoader(self.hs.config.email_template_dir)
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env = jinja2.Environment(loader=loader)
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env.filters["format_ts"] = format_ts_filter
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env.filters["mxc_to_http"] = self.mxc_to_http_filter
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self.notif_template_html = env.get_template(
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self.hs.config.email_notif_template_html
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)
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self.notif_template_text = env.get_template(
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self.hs.config.email_notif_template_text
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)
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@defer.inlineCallbacks
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def send_notification_mail(self, user_id, email_address, push_actions):
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raw_from = email.utils.parseaddr(self.hs.config.email_notif_from)[1]
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raw_to = email.utils.parseaddr(email_address)[1]
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if raw_to == '':
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raise RuntimeError("Invalid 'to' address")
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rooms_in_order = deduped_ordered_list(
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[pa['room_id'] for pa in push_actions]
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)
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notif_events = yield self.store.get_events(
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[pa['event_id'] for pa in push_actions]
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)
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notifs_by_room = {}
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for pa in push_actions:
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notifs_by_room.setdefault(pa["room_id"], []).append(pa)
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# collect the current state for all the rooms in which we have
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# notifications
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state_by_room = {}
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try:
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user_display_name = yield self.store.get_profile_displayname(
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UserID.from_string(user_id).localpart
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)
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except StoreError:
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user_display_name = user_id
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@defer.inlineCallbacks
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def _fetch_room_state(room_id):
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room_state = yield self.state_handler.get_current_state(room_id)
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state_by_room[room_id] = room_state
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# Run at most 3 of these at once: sync does 10 at a time but email
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# notifs are much realtime than sync so we can afford to wait a bit.
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yield concurrently_execute(_fetch_room_state, rooms_in_order, 3)
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rooms = []
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for r in rooms_in_order:
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roomvars = yield self.get_room_vars(
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r, user_id, notifs_by_room[r], notif_events, state_by_room[r]
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)
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rooms.append(roomvars)
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summary_text = self.make_summary_text(
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notifs_by_room, state_by_room, notif_events, user_id
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)
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template_vars = {
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"user_display_name": user_display_name,
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"unsubscribe_link": self.make_unsubscribe_link(),
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"summary_text": summary_text,
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"rooms": rooms,
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}
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html_text = self.notif_template_html.render(**template_vars)
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html_part = MIMEText(html_text, "html", "utf8")
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plain_text = self.notif_template_text.render(**template_vars)
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text_part = MIMEText(plain_text, "plain", "utf8")
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multipart_msg = MIMEMultipart('alternative')
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multipart_msg['Subject'] = "New Matrix Notifications"
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multipart_msg['From'] = self.hs.config.email_notif_from
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multipart_msg['To'] = email_address
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multipart_msg.attach(text_part)
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multipart_msg.attach(html_part)
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yield sendmail(
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self.hs.config.email_smtp_host,
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raw_from, raw_to, multipart_msg.as_string(),
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port=self.hs.config.email_smtp_port
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)
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@defer.inlineCallbacks
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def get_room_vars(self, room_id, user_id, notifs, notif_events, room_state):
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my_member_event = room_state[("m.room.member", user_id)]
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is_invite = my_member_event.content["membership"] == "invite"
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room_vars = {
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"title": calculate_room_name(room_state, user_id),
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"hash": string_ordinal_total(room_id), # See sender avatar hash
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"notifs": [],
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"invite": is_invite,
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"link": self.make_room_link(room_id),
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}
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if not is_invite:
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for n in notifs:
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notifvars = yield self.get_notif_vars(
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n, user_id, notif_events[n['event_id']], room_state
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)
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room_vars['notifs'].append(notifvars)
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defer.returnValue(room_vars)
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@defer.inlineCallbacks
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def get_notif_vars(self, notif, user_id, notif_event, room_state):
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results = yield self.store.get_events_around(
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notif['room_id'], notif['event_id'],
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before_limit=CONTEXT_BEFORE, after_limit=0
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)
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ret = {
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"link": self.make_notif_link(notif),
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"ts": notif['received_ts'],
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"messages": [],
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}
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handler = self.hs.get_handlers().message_handler
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the_events = yield handler.filter_events_for_client(
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user_id, results["events_before"]
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)
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the_events.append(notif_event)
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for event in the_events:
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messagevars = self.get_message_vars(notif, event, room_state)
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if messagevars is not None:
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ret['messages'].append(messagevars)
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defer.returnValue(ret)
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def get_message_vars(self, notif, event, room_state):
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if event.type != "m.room.message":
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return None
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sender_state_event = room_state[("m.room.member", event.sender)]
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sender_name = name_from_member_event(sender_state_event)
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sender_avatar_url = sender_state_event.content["avatar_url"]
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# 'hash' for deterministically picking default images: use
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# sender_hash % the number of default images to choose from
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sender_hash = string_ordinal_total(event.sender)
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ret = {
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"msgtype": event.content["msgtype"],
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"is_historical": event.event_id != notif['event_id'],
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"ts": event.origin_server_ts,
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"sender_name": sender_name,
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"sender_avatar_url": sender_avatar_url,
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"sender_hash": sender_hash,
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}
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if event.content["msgtype"] == "m.text":
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self.add_text_message_vars(ret, event)
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elif event.content["msgtype"] == "m.image":
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self.add_image_message_vars(ret, event)
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if "body" in event.content:
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ret["body_text_plain"] = event.content["body"]
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return ret
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def add_text_message_vars(self, messagevars, event):
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if "format" in event.content:
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msgformat = event.content["format"]
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else:
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msgformat = None
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messagevars["format"] = msgformat
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if msgformat == "org.matrix.custom.html":
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messagevars["body_text_html"] = safe_markup(event.content["formatted_body"])
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else:
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messagevars["body_text_html"] = safe_text(event.content["body"])
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return messagevars
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def add_image_message_vars(self, messagevars, event):
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messagevars["image_url"] = event.content["url"]
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return messagevars
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def make_summary_text(self, notifs_by_room, state_by_room, notif_events, user_id):
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if len(notifs_by_room) == 1:
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# Only one room has new stuff
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room_id = notifs_by_room.keys()[0]
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# If the room has some kind of name, use it, but we don't
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# want the generated-from-names one here otherwise we'll
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# end up with, "new message from Bob in the Bob room"
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room_name = calculate_room_name(
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state_by_room[room_id], user_id, fallback_to_members=False
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)
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my_member_event = state_by_room[room_id][("m.room.member", user_id)]
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if my_member_event.content["membership"] == "invite":
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inviter_member_event = state_by_room[room_id][
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("m.room.member", my_member_event.sender)
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]
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inviter_name = name_from_member_event(inviter_member_event)
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if room_name is None:
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return INVITE_FROM_PERSON % {"person": inviter_name}
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else:
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return INVITE_FROM_PERSON_TO_ROOM % {
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"person": inviter_name, "room": room_name
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}
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sender_name = None
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if len(notifs_by_room[room_id]) == 1:
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# There is just the one notification, so give some detail
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event = notif_events[notifs_by_room[room_id][0]["event_id"]]
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if ("m.room.member", event.sender) in state_by_room[room_id]:
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state_event = state_by_room[room_id][("m.room.member", event.sender)]
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sender_name = name_from_member_event(state_event)
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if sender_name is not None and room_name is not None:
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return MESSAGE_FROM_PERSON_IN_ROOM % {
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"person": sender_name, "room": room_name
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}
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elif sender_name is not None:
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return MESSAGE_FROM_PERSON % {
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"person": sender_name
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}
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else:
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# There's more than one notification for this room, so just
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# say there are several
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if room_name is not None:
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return MESSAGES_IN_ROOM % {
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"room": room_name
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}
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else:
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# If the room doesn't have a name, say who the messages
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# are from explicitly to avoid, "messages in the Bob room"
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sender_ids = list(set([
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notif_events[n['event_id']].sender
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for n in notifs_by_room[room_id]
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]))
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return MESSAGES_FROM_PERSON % {
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"person": descriptor_from_member_events([
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state_by_room[room_id][("m.room.member", s)]
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for s in sender_ids
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])
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}
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else:
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# Stuff's happened in multiple different rooms
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return MESSAGES_IN_ROOMS
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def make_room_link(self, room_id):
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return "https://matrix.to/%s" % (room_id,)
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def make_notif_link(self, notif):
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return "https://matrix.to/%s/%s" % (
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notif['room_id'], notif['event_id']
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)
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def make_unsubscribe_link(self):
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return "https://vector.im/#/settings" # XXX: matrix.to
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def mxc_to_http_filter(self, value, width, height, resize_method="crop"):
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if value[0:6] != "mxc://":
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return ""
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serverAndMediaId = value[6:]
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params = {
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"width": width,
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"height": height,
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"method": resize_method,
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}
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return "%s_matrix/media/v1/thumbnail/%s?%s" % (
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self.hs.config.public_baseurl,
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serverAndMediaId,
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urllib.urlencode(params)
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)
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def safe_markup(raw_html):
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return jinja2.Markup(bleach.linkify(bleach.clean(
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raw_html, tags=ALLOWED_TAGS, attributes=ALLOWED_ATTRS,
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# bleach master has this, but it isn't released yet
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# protocols=ALLOWED_SCHEMES,
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strip=True
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)))
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def safe_text(raw_text):
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"""
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Process text: treat it as HTML but escape any tags (ie. just escape the
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HTML) then linkify it.
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"""
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return jinja2.Markup(bleach.linkify(bleach.clean(
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raw_text, tags=[], attributes={},
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strip=False
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)))
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def deduped_ordered_list(l):
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seen = set()
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ret = []
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for item in l:
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if item not in seen:
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seen.add(item)
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ret.append(item)
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return ret
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def string_ordinal_total(s):
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tot = 0
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for c in s:
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tot += ord(c)
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return tot
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def format_ts_filter(value, format):
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return time.strftime(format, time.localtime(value / 1000))
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