diff options
Diffstat (limited to 'synapse/push/mailer.py')
| -rw-r--r-- | synapse/push/mailer.py | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py new file mode 100644 index 0000000000..2fd38a036a --- /dev/null +++ b/synapse/push/mailer.py @@ -0,0 +1,456 @@ +# -*- coding: utf-8 -*- +# Copyright 2016 OpenMarket Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from twisted.internet import defer +from twisted.mail.smtp import sendmail + +import email.utils +import email.mime.multipart +from email.mime.text import MIMEText +from email.mime.multipart import MIMEMultipart + +from synapse.util.async import concurrently_execute +from synapse.util.presentable_names import ( + calculate_room_name, name_from_member_event, descriptor_from_member_events +) +from synapse.types import UserID +from synapse.api.errors import StoreError +from synapse.api.constants import EventTypes +from synapse.visibility import filter_events_for_client + +import jinja2 +import bleach + +import time +import urllib + +import logging +logger = logging.getLogger(__name__) + + +MESSAGE_FROM_PERSON_IN_ROOM = "You have a message on %(app)s from %(person)s " \ + "in the %s room..." +MESSAGE_FROM_PERSON = "You have a message on %(app)s from %(person)s..." +MESSAGES_FROM_PERSON = "You have messages on %(app)s from %(person)s..." +MESSAGES_IN_ROOM = "There are some messages on %(app)s for you in the %(room)s room..." +MESSAGES_IN_ROOMS = "Here are some messages on %(app)s you may have missed..." +INVITE_FROM_PERSON_TO_ROOM = "%(person)s has invited you to join the " \ + "%(room)s room on %(app)s..." +INVITE_FROM_PERSON = "%(person)s has invited you to chat on %(app)s..." + +CONTEXT_BEFORE = 1 +CONTEXT_AFTER = 1 + +# From https://github.com/matrix-org/matrix-react-sdk/blob/master/src/HtmlUtils.js +ALLOWED_TAGS = [ + 'font', # custom to matrix for IRC-style font coloring + 'del', # for markdown + # deliberately no h1/h2 to stop people shouting. + 'h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol', + 'nl', 'li', 'b', 'i', 'u', 'strong', 'em', 'strike', 'code', 'hr', 'br', 'div', + 'table', 'thead', 'caption', 'tbody', 'tr', 'th', 'td', 'pre' +] +ALLOWED_ATTRS = { + # custom ones first: + "font": ["color"], # custom to matrix + "a": ["href", "name", "target"], # remote target: custom to matrix + # We don't currently allow img itself by default, but this + # would make sense if we did + "img": ["src"], +} +# When bleach release a version with this option, we can specify schemes +# ALLOWED_SCHEMES = ["http", "https", "ftp", "mailto"] + + +class Mailer(object): + def __init__(self, hs): + self.hs = hs + self.store = self.hs.get_datastore() + self.state_handler = self.hs.get_state_handler() + loader = jinja2.FileSystemLoader(self.hs.config.email_template_dir) + self.app_name = self.hs.config.email_app_name + env = jinja2.Environment(loader=loader) + env.filters["format_ts"] = format_ts_filter + env.filters["mxc_to_http"] = self.mxc_to_http_filter + self.notif_template_html = env.get_template( + self.hs.config.email_notif_template_html + ) + self.notif_template_text = env.get_template( + self.hs.config.email_notif_template_text + ) + + @defer.inlineCallbacks + def send_notification_mail(self, user_id, email_address, push_actions): + raw_from = email.utils.parseaddr(self.hs.config.email_notif_from)[1] + raw_to = email.utils.parseaddr(email_address)[1] + + if raw_to == '': + raise RuntimeError("Invalid 'to' address") + + rooms_in_order = deduped_ordered_list( + [pa['room_id'] for pa in push_actions] + ) + + notif_events = yield self.store.get_events( + [pa['event_id'] for pa in push_actions] + ) + + notifs_by_room = {} + for pa in push_actions: + notifs_by_room.setdefault(pa["room_id"], []).append(pa) + + # collect the current state for all the rooms in which we have + # notifications + state_by_room = {} + + try: + user_display_name = yield self.store.get_profile_displayname( + UserID.from_string(user_id).localpart + ) + except StoreError: + user_display_name = user_id + + @defer.inlineCallbacks + def _fetch_room_state(room_id): + room_state = yield self.state_handler.get_current_state(room_id) + state_by_room[room_id] = room_state + + # Run at most 3 of these at once: sync does 10 at a time but email + # notifs are much realtime than sync so we can afford to wait a bit. + yield concurrently_execute(_fetch_room_state, rooms_in_order, 3) + + rooms = [] + + for r in rooms_in_order: + roomvars = yield self.get_room_vars( + r, user_id, notifs_by_room[r], notif_events, state_by_room[r] + ) + rooms.append(roomvars) + + summary_text = self.make_summary_text( + notifs_by_room, state_by_room, notif_events, user_id + ) + + template_vars = { + "user_display_name": user_display_name, + "unsubscribe_link": self.make_unsubscribe_link(), + "summary_text": summary_text, + "app_name": self.app_name, + "rooms": rooms, + } + + html_text = self.notif_template_html.render(**template_vars) + html_part = MIMEText(html_text, "html", "utf8") + + plain_text = self.notif_template_text.render(**template_vars) + text_part = MIMEText(plain_text, "plain", "utf8") + + multipart_msg = MIMEMultipart('alternative') + multipart_msg['Subject'] = "[%s] %s" % (self.app_name, summary_text) + multipart_msg['From'] = self.hs.config.email_notif_from + multipart_msg['To'] = email_address + multipart_msg['Date'] = email.utils.formatdate() + multipart_msg['Message-ID'] = email.utils.make_msgid() + multipart_msg.attach(text_part) + multipart_msg.attach(html_part) + + logger.info("Sending email push notification to %s" % email_address) + # logger.debug(html_text) + + yield sendmail( + self.hs.config.email_smtp_host, + raw_from, raw_to, multipart_msg.as_string(), + port=self.hs.config.email_smtp_port + ) + + @defer.inlineCallbacks + def get_room_vars(self, room_id, user_id, notifs, notif_events, room_state): + my_member_event = room_state[("m.room.member", user_id)] + is_invite = my_member_event.content["membership"] == "invite" + + room_vars = { + "title": calculate_room_name(room_state, user_id), + "hash": string_ordinal_total(room_id), # See sender avatar hash + "notifs": [], + "invite": is_invite, + "link": self.make_room_link(room_id), + } + + if not is_invite: + for n in notifs: + notifvars = yield self.get_notif_vars( + n, user_id, notif_events[n['event_id']], room_state + ) + + # merge overlapping notifs together. + # relies on the notifs being in chronological order. + merge = False + if room_vars['notifs'] and 'messages' in room_vars['notifs'][-1]: + prev_messages = room_vars['notifs'][-1]['messages'] + for message in notifvars['messages']: + pm = filter(lambda pm: pm['id'] == message['id'], prev_messages) + if pm: + if not message["is_historical"]: + pm[0]["is_historical"] = False + merge = True + elif merge: + # we're merging, so append any remaining messages + # in this notif to the previous one + prev_messages.append(message) + + if not merge: + room_vars['notifs'].append(notifvars) + + defer.returnValue(room_vars) + + @defer.inlineCallbacks + def get_notif_vars(self, notif, user_id, notif_event, room_state): + results = yield self.store.get_events_around( + notif['room_id'], notif['event_id'], + before_limit=CONTEXT_BEFORE, after_limit=CONTEXT_AFTER + ) + + ret = { + "link": self.make_notif_link(notif), + "ts": notif['received_ts'], + "messages": [], + } + + the_events = yield filter_events_for_client( + self.store, user_id, results["events_before"] + ) + the_events.append(notif_event) + + for event in the_events: + messagevars = self.get_message_vars(notif, event, room_state) + if messagevars is not None: + ret['messages'].append(messagevars) + + defer.returnValue(ret) + + def get_message_vars(self, notif, event, room_state): + if event.type != EventTypes.Message: + return None + + sender_state_event = room_state[("m.room.member", event.sender)] + sender_name = name_from_member_event(sender_state_event) + sender_avatar_url = sender_state_event.content["avatar_url"] + + # 'hash' for deterministically picking default images: use + # sender_hash % the number of default images to choose from + sender_hash = string_ordinal_total(event.sender) + + ret = { + "msgtype": event.content["msgtype"], + "is_historical": event.event_id != notif['event_id'], + "id": event.event_id, + "ts": event.origin_server_ts, + "sender_name": sender_name, + "sender_avatar_url": sender_avatar_url, + "sender_hash": sender_hash, + } + + if event.content["msgtype"] == "m.text": + self.add_text_message_vars(ret, event) + elif event.content["msgtype"] == "m.image": + self.add_image_message_vars(ret, event) + + if "body" in event.content: + ret["body_text_plain"] = event.content["body"] + + return ret + + def add_text_message_vars(self, messagevars, event): + if "format" in event.content: + msgformat = event.content["format"] + else: + msgformat = None + messagevars["format"] = msgformat + + if msgformat == "org.matrix.custom.html": + messagevars["body_text_html"] = safe_markup(event.content["formatted_body"]) + else: + messagevars["body_text_html"] = safe_text(event.content["body"]) + + return messagevars + + def add_image_message_vars(self, messagevars, event): + messagevars["image_url"] = event.content["url"] + + return messagevars + + def make_summary_text(self, notifs_by_room, state_by_room, notif_events, user_id): + if len(notifs_by_room) == 1: + # Only one room has new stuff + room_id = notifs_by_room.keys()[0] + + # If the room has some kind of name, use it, but we don't + # want the generated-from-names one here otherwise we'll + # end up with, "new message from Bob in the Bob room" + room_name = calculate_room_name( + state_by_room[room_id], user_id, fallback_to_members=False + ) + + my_member_event = state_by_room[room_id][("m.room.member", user_id)] + if my_member_event.content["membership"] == "invite": + inviter_member_event = state_by_room[room_id][ + ("m.room.member", my_member_event.sender) + ] + inviter_name = name_from_member_event(inviter_member_event) + + if room_name is None: + return INVITE_FROM_PERSON % { + "person": inviter_name, + "app": self.app_name + } + else: + return INVITE_FROM_PERSON_TO_ROOM % { + "person": inviter_name, + "room": room_name, + "app": self.app_name, + } + + sender_name = None + if len(notifs_by_room[room_id]) == 1: + # There is just the one notification, so give some detail + event = notif_events[notifs_by_room[room_id][0]["event_id"]] + if ("m.room.member", event.sender) in state_by_room[room_id]: + state_event = state_by_room[room_id][("m.room.member", event.sender)] + sender_name = name_from_member_event(state_event) + + if sender_name is not None and room_name is not None: + return MESSAGE_FROM_PERSON_IN_ROOM % { + "person": sender_name, + "room": room_name, + "app": self.app_name, + } + elif sender_name is not None: + return MESSAGE_FROM_PERSON % { + "person": sender_name, + "app": self.app_name, + } + else: + # There's more than one notification for this room, so just + # say there are several + if room_name is not None: + return MESSAGES_IN_ROOM % { + "room": room_name, + "app": self.app_name, + } + else: + # If the room doesn't have a name, say who the messages + # are from explicitly to avoid, "messages in the Bob room" + sender_ids = list(set([ + notif_events[n['event_id']].sender + for n in notifs_by_room[room_id] + ])) + + return MESSAGES_FROM_PERSON % { + "person": descriptor_from_member_events([ + state_by_room[room_id][("m.room.member", s)] + for s in sender_ids + ]), + "app": self.app_name, + } + else: + # Stuff's happened in multiple different rooms + return MESSAGES_IN_ROOMS % { + "app": self.app_name, + } + + def make_room_link(self, room_id): + # need /beta for Universal Links to work on iOS + if self.app_name == "Vector": + return "https://vector.im/beta/#/room/%s" % (room_id,) + else: + return "https://matrix.to/#/%s" % (room_id,) + + def make_notif_link(self, notif): + # need /beta for Universal Links to work on iOS + if self.app_name == "Vector": + return "https://vector.im/beta/#/room/%s/%s" % ( + notif['room_id'], notif['event_id'] + ) + else: + return "https://matrix.to/#/%s/%s" % ( + notif['room_id'], notif['event_id'] + ) + + def make_unsubscribe_link(self): + # XXX: matrix.to + return "https://vector.im/#/settings" + + def mxc_to_http_filter(self, value, width, height, resize_method="crop"): + if value[0:6] != "mxc://": + return "" + + serverAndMediaId = value[6:] + fragment = None + if '#' in serverAndMediaId: + (serverAndMediaId, fragment) = serverAndMediaId.split('#', 1) + fragment = "#" + fragment + + params = { + "width": width, + "height": height, + "method": resize_method, + } + return "%s_matrix/media/v1/thumbnail/%s?%s%s" % ( + self.hs.config.public_baseurl, + serverAndMediaId, + urllib.urlencode(params), + fragment or "", + ) + + +def safe_markup(raw_html): + return jinja2.Markup(bleach.linkify(bleach.clean( + raw_html, tags=ALLOWED_TAGS, attributes=ALLOWED_ATTRS, + # bleach master has this, but it isn't released yet + # protocols=ALLOWED_SCHEMES, + strip=True + ))) + + +def safe_text(raw_text): + """ + Process text: treat it as HTML but escape any tags (ie. just escape the + HTML) then linkify it. + """ + return jinja2.Markup(bleach.linkify(bleach.clean( + raw_text, tags=[], attributes={}, + strip=False + ))) + + +def deduped_ordered_list(l): + seen = set() + ret = [] + for item in l: + if item not in seen: + seen.add(item) + ret.append(item) + return ret + + +def string_ordinal_total(s): + tot = 0 + for c in s: + tot += ord(c) + return tot + + +def format_ts_filter(value, format): + return time.strftime(format, time.localtime(value / 1000)) |