mirror of https://github.com/zulip/zulip.git
447 lines
18 KiB
Python
447 lines
18 KiB
Python
from __future__ import print_function
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from typing import cast, Any, Dict, Iterable, List, Mapping, Optional, Sequence, Tuple, Text
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from confirmation.models import Confirmation
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from django.conf import settings
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from django.template import loader
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from django.utils.timezone import now as timezone_now
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from zerver.decorator import statsd_increment
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from zerver.lib.send_email import send_future_email, display_email, \
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send_email_from_dict, FromAddress
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from zerver.lib.queue import queue_json_publish
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from zerver.models import (
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Recipient,
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ScheduledJob,
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UserMessage,
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Stream,
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get_display_recipient,
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UserProfile,
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get_user_profile_by_email,
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get_user_profile_by_id,
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receives_offline_notifications,
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get_context_for_message,
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Message,
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Realm,
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)
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import datetime
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from email.utils import formataddr
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import re
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import subprocess
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import ujson
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from six.moves import urllib
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from collections import defaultdict
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def unsubscribe_token(user_profile):
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# type: (UserProfile) -> Text
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# Leverage the Django confirmations framework to generate and track unique
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# unsubscription tokens.
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return Confirmation.objects.get_link_for_object(user_profile).split("/")[-1]
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def one_click_unsubscribe_link(user_profile, endpoint):
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# type: (UserProfile, Text) -> Text
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"""
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Generate a unique link that a logged-out user can visit to unsubscribe from
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Zulip e-mails without having to first log in.
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"""
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token = unsubscribe_token(user_profile)
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resource_path = "accounts/unsubscribe/%s/%s" % (endpoint, token)
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return "%s/%s" % (user_profile.realm.uri.rstrip("/"), resource_path)
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def hash_util_encode(string):
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# type: (Text) -> Text
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# Do the same encoding operation as hash_util.encodeHashComponent on the
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# frontend.
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# `safe` has a default value of "/", but we want those encoded, too.
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return urllib.parse.quote(
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string.encode("utf-8"), safe=b"").replace(".", "%2E").replace("%", ".")
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def pm_narrow_url(realm, participants):
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# type: (Realm, List[Text]) -> Text
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participants.sort()
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base_url = u"%s/#narrow/pm-with/" % (realm.uri,)
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return base_url + hash_util_encode(",".join(participants))
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def stream_narrow_url(realm, stream):
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# type: (Realm, Text) -> Text
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base_url = u"%s/#narrow/stream/" % (realm.uri,)
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return base_url + hash_util_encode(stream)
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def topic_narrow_url(realm, stream, topic):
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# type: (Realm, Text, Text) -> Text
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base_url = u"%s/#narrow/stream/" % (realm.uri,)
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return u"%s%s/topic/%s" % (base_url, hash_util_encode(stream),
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hash_util_encode(topic))
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def build_message_list(user_profile, messages):
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# type: (UserProfile, List[Message]) -> List[Dict[str, Any]]
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"""
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Builds the message list object for the missed message email template.
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The messages are collapsed into per-recipient and per-sender blocks, like
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our web interface
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"""
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messages_to_render = [] # type: List[Dict[str, Any]]
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def sender_string(message):
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# type: (Message) -> Text
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if message.recipient.type in (Recipient.STREAM, Recipient.HUDDLE):
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return message.sender.full_name
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else:
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return ''
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def relative_to_full_url(content):
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# type: (Text) -> Text
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# URLs for uploaded content are of the form
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# "/user_uploads/abc.png". Make them full paths.
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#
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# There's a small chance of colliding with non-Zulip URLs containing
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# "/user_uploads/", but we don't have much information about the
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# structure of the URL to leverage.
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content = re.sub(
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r"/user_uploads/(\S*)",
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user_profile.realm.uri + r"/user_uploads/\1", content)
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# Our proxying user-uploaded images seems to break inline images in HTML
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# emails, so scrub the image but leave the link.
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content = re.sub(
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r"<img src=(\S+)/user_uploads/(\S+)>", "", content)
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# URLs for emoji are of the form
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# "static/generated/emoji/images/emoji/snowflake.png".
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content = re.sub(
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r"/static/generated/emoji/images/emoji/",
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user_profile.realm.uri + r"/static/generated/emoji/images/emoji/",
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content)
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return content
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def fix_plaintext_image_urls(content):
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# type: (Text) -> Text
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# Replace image URLs in plaintext content of the form
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# [image name](image url)
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# with a simple hyperlink.
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return re.sub(r"\[(\S*)\]\((\S*)\)", r"\2", content)
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def fix_emoji_sizes(html):
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# type: (Text) -> Text
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return html.replace(' class="emoji"', ' height="20px"')
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def build_message_payload(message):
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# type: (Message) -> Dict[str, Text]
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plain = message.content
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plain = fix_plaintext_image_urls(plain)
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plain = relative_to_full_url(plain)
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assert message.rendered_content is not None
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html = message.rendered_content
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html = relative_to_full_url(html)
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html = fix_emoji_sizes(html)
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return {'plain': plain, 'html': html}
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def build_sender_payload(message):
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# type: (Message) -> Dict[str, Any]
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sender = sender_string(message)
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return {'sender': sender,
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'content': [build_message_payload(message)]}
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def message_header(user_profile, message):
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# type: (UserProfile, Message) -> Dict[str, Any]
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disp_recipient = get_display_recipient(message.recipient)
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if message.recipient.type == Recipient.PERSONAL:
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header = u"You and %s" % (message.sender.full_name,)
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html_link = pm_narrow_url(user_profile.realm, [message.sender.email])
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header_html = u"<a style='color: #ffffff;' href='%s'>%s</a>" % (html_link, header)
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elif message.recipient.type == Recipient.HUDDLE:
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assert not isinstance(disp_recipient, Text)
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other_recipients = [r['full_name'] for r in disp_recipient
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if r['email'] != user_profile.email]
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header = u"You and %s" % (", ".join(other_recipients),)
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html_link = pm_narrow_url(user_profile.realm, [r["email"] for r in disp_recipient
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if r["email"] != user_profile.email])
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header_html = u"<a style='color: #ffffff;' href='%s'>%s</a>" % (html_link, header)
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else:
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assert isinstance(disp_recipient, Text)
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header = u"%s > %s" % (disp_recipient, message.topic_name())
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stream_link = stream_narrow_url(user_profile.realm, disp_recipient)
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topic_link = topic_narrow_url(user_profile.realm, disp_recipient, message.subject)
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header_html = u"<a href='%s'>%s</a> > <a href='%s'>%s</a>" % (
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stream_link, disp_recipient, topic_link, message.subject)
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return {"plain": header,
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"html": header_html,
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"stream_message": message.recipient.type_name() == "stream"}
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# # Collapse message list to
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# [
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# {
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# "header": {
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# "plain":"header",
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# "html":"htmlheader"
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# }
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# "senders":[
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# {
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# "sender":"sender_name",
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# "content":[
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# {
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# "plain":"content",
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# "html":"htmlcontent"
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# }
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# {
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# "plain":"content",
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# "html":"htmlcontent"
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# }
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# ]
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# }
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# ]
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# },
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# ]
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messages.sort(key=lambda message: message.pub_date)
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for message in messages:
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header = message_header(user_profile, message)
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# If we want to collapse into the previous recipient block
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if len(messages_to_render) > 0 and messages_to_render[-1]['header'] == header:
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sender = sender_string(message)
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sender_block = messages_to_render[-1]['senders']
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# Same message sender, collapse again
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if sender_block[-1]['sender'] == sender:
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sender_block[-1]['content'].append(build_message_payload(message))
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else:
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# Start a new sender block
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sender_block.append(build_sender_payload(message))
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else:
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# New recipient and sender block
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recipient_block = {'header': header,
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'senders': [build_sender_payload(message)]}
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messages_to_render.append(recipient_block)
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return messages_to_render
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@statsd_increment("missed_message_reminders")
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def do_send_missedmessage_events_reply_in_zulip(user_profile, missed_messages, message_count):
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# type: (UserProfile, List[Message], int) -> None
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"""
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Send a reminder email to a user if she's missed some PMs by being offline.
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The email will have its reply to address set to a limited used email
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address that will send a zulip message to the correct recipient. This
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allows the user to respond to missed PMs, huddles, and @-mentions directly
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from the email.
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`user_profile` is the user to send the reminder to
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`missed_messages` is a list of Message objects to remind about they should
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all have the same recipient and subject
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"""
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from zerver.context_processors import common_context
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# Disabled missedmessage emails internally
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if not user_profile.enable_offline_email_notifications:
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return
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recipients = set((msg.recipient_id, msg.subject) for msg in missed_messages)
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if len(recipients) != 1:
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raise ValueError(
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'All missed_messages must have the same recipient and subject %r' %
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recipients
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)
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unsubscribe_link = one_click_unsubscribe_link(user_profile, "missed_messages")
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context = common_context(user_profile)
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context.update({
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'name': user_profile.full_name,
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'messages': build_message_list(user_profile, missed_messages),
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'message_count': message_count,
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'mention': missed_messages[0].recipient.type == Recipient.STREAM,
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'unsubscribe_link': unsubscribe_link,
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})
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# If this setting (email mirroring integration) is enabled, only then
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# can users reply to email to send message to Zulip. Thus, one must
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# ensure to display warning in the template.
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if settings.EMAIL_GATEWAY_PATTERN:
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context.update({
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'reply_warning': False,
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'reply_to_zulip': True,
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})
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else:
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context.update({
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'reply_warning': True,
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'reply_to_zulip': False,
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})
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from zerver.lib.email_mirror import create_missed_message_address
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reply_to_address = create_missed_message_address(user_profile, missed_messages[0])
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if reply_to_address == FromAddress.NOREPLY:
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reply_to_name = None
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else:
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reply_to_name = "Zulip"
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senders = list(set(m.sender for m in missed_messages))
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if (missed_messages[0].recipient.type == Recipient.HUDDLE):
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display_recipient = get_display_recipient(missed_messages[0].recipient)
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# Make sure that this is a list of strings, not a string.
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assert not isinstance(display_recipient, Text)
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other_recipients = [r['full_name'] for r in display_recipient
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if r['id'] != user_profile.id]
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context.update({'group_pm': True})
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if len(other_recipients) == 2:
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huddle_display_name = u"%s" % (" and ".join(other_recipients))
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context.update({'huddle_display_name': huddle_display_name})
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elif len(other_recipients) == 3:
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huddle_display_name = u"%s, %s, and %s" % (other_recipients[0], other_recipients[1], other_recipients[2])
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context.update({'huddle_display_name': huddle_display_name})
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else:
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huddle_display_name = u"%s, and %s others" % (', '.join(other_recipients[:2]), len(other_recipients) - 2)
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context.update({'huddle_display_name': huddle_display_name})
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elif (missed_messages[0].recipient.type == Recipient.PERSONAL):
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context.update({'private_message': True})
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else:
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# Keep only the senders who actually mentioned the user
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#
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# TODO: When we add wildcard mentions that send emails, add
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# them to the filter here.
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senders = list(set(m.sender for m in missed_messages if
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UserMessage.objects.filter(message=m, user_profile=user_profile,
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flags=UserMessage.flags.mentioned).exists()))
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context.update({'at_mention': True})
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context.update({
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'sender_str': ", ".join(sender.full_name for sender in senders),
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'realm_str': user_profile.realm.name,
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})
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from_name, from_address = None, None
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if len(senders) == 1 and settings.SEND_MISSED_MESSAGE_EMAILS_AS_USER:
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# If this setting is enabled, you can reply to the Zulip
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# missed message emails directly back to the original sender.
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# However, one must ensure the Zulip server is in the SPF
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# record for the domain, or there will be spam/deliverability
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# problems.
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sender = senders[0]
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from_name, from_address = (sender.full_name, sender.email)
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context.update({
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'reply_warning': False,
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'reply_to_zulip': False,
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})
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email_dict = {
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'template_prefix': 'zerver/emails/missed_message',
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'to_email': display_email(user_profile),
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'from_name': from_name,
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'from_address': from_address,
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'reply_to_email': formataddr((reply_to_name, reply_to_address)),
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'context': context}
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queue_json_publish("missedmessage_email_senders", email_dict, send_email_from_dict)
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user_profile.last_reminder = timezone_now()
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user_profile.save(update_fields=['last_reminder'])
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def handle_missedmessage_emails(user_profile_id, missed_email_events):
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# type: (int, Iterable[Dict[str, Any]]) -> None
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message_ids = [event.get('message_id') for event in missed_email_events]
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user_profile = get_user_profile_by_id(user_profile_id)
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if not receives_offline_notifications(user_profile):
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return
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messages = Message.objects.filter(usermessage__user_profile_id=user_profile,
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id__in=message_ids,
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usermessage__flags=~UserMessage.flags.read)
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# Cancel missed-message emails for deleted messages
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messages = [um for um in messages if um.content != "(deleted)"]
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if not messages:
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return
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messages_by_recipient_subject = defaultdict(list) # type: Dict[Tuple[int, Text], List[Message]]
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for msg in messages:
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messages_by_recipient_subject[(msg.recipient_id, msg.topic_name())].append(msg)
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message_count_by_recipient_subject = {
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recipient_subject: len(msgs)
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for recipient_subject, msgs in messages_by_recipient_subject.items()
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}
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for msg_list in messages_by_recipient_subject.values():
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msg = min(msg_list, key=lambda msg: msg.pub_date)
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if msg.recipient.type == Recipient.STREAM:
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msg_list.extend(get_context_for_message(msg))
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# Send an email per recipient subject pair
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for recipient_subject, msg_list in messages_by_recipient_subject.items():
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unique_messages = {m.id: m for m in msg_list}
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do_send_missedmessage_events_reply_in_zulip(
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user_profile,
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list(unique_messages.values()),
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message_count_by_recipient_subject[recipient_subject],
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)
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def clear_followup_emails_queue(email):
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# type: (Text) -> None
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"""
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Clear out queued emails that would otherwise be sent to a specific email address.
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"""
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items = ScheduledJob.objects.filter(type=ScheduledJob.EMAIL, filter_string__iexact = email)
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items.delete()
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def log_digest_event(msg):
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# type: (Text) -> None
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import logging
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logging.basicConfig(filename=settings.DIGEST_LOG_PATH, level=logging.INFO)
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logging.info(msg)
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def enqueue_welcome_emails(email, name):
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# type: (Text, Text) -> None
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from zerver.context_processors import common_context
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if settings.WELCOME_EMAIL_SENDER is not None:
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# line break to avoid triggering lint rule
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from_name = settings.WELCOME_EMAIL_SENDER['name']
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from_address = settings.WELCOME_EMAIL_SENDER['email']
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else:
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from_name = None
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from_address = FromAddress.SUPPORT
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user_profile = get_user_profile_by_email(email)
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unsubscribe_link = one_click_unsubscribe_link(user_profile, "welcome")
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context = common_context(user_profile)
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context.update({
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'unsubscribe_link': unsubscribe_link
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})
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send_future_email(
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"zerver/emails/followup_day1", '%s <%s>' % (name, email), from_name=from_name,
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from_address=from_address, context=context, delay=datetime.timedelta(hours=1))
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send_future_email(
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"zerver/emails/followup_day2", '%s <%s>' % (name, email), from_name=from_name,
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from_address=from_address, context=context, delay=datetime.timedelta(days=1))
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def convert_html_to_markdown(html):
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# type: (Text) -> Text
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# On Linux, the tool installs as html2markdown, and there's a command called
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# html2text that does something totally different. On OSX, the tool installs
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# as html2text.
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commands = ["html2markdown", "html2text"]
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for command in commands:
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try:
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# A body width of 0 means do not try to wrap the text for us.
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p = subprocess.Popen(
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[command, "--body-width=0"], stdout=subprocess.PIPE,
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stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
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break
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except OSError:
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continue
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markdown = p.communicate(input=html.encode('utf-8'))[0].decode('utf-8').strip()
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# We want images to get linked and inline previewed, but html2text will turn
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# them into links of the form ``, which is
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# ugly. Run a regex over the resulting description, turning links of the
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# form `` into
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# `[image.png](http://foo.com/image.png)`.
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return re.sub(u"!\\[\\]\\((\\S*)/(\\S*)\\?(\\S*)\\)",
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u"[\\2](\\1/\\2)", markdown)
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