mirror of https://github.com/zulip/zulip.git
568 lines
24 KiB
Python
568 lines
24 KiB
Python
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from typing import cast, Any, Dict, Iterable, List, Mapping, Optional, Sequence, Tuple
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from confirmation.models import Confirmation, create_confirmation_link
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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 django.utils.translation import ugettext as _
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from zerver.decorator import statsd_increment
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from zerver.lib.send_email import send_future_email, 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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ScheduledEmail,
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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,
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get_user_profile_by_id,
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receives_offline_email_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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from datetime import timedelta, datetime
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from email.utils import formataddr
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from lxml.cssselect import CSSSelector
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import lxml.html
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import re
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import subprocess
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import ujson
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import urllib
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from collections import defaultdict
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import pytz
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def one_click_unsubscribe_link(user_profile: UserProfile, email_type: str) -> str:
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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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return create_confirmation_link(user_profile, user_profile.realm.host,
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Confirmation.UNSUBSCRIBE,
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url_args = {'email_type': email_type})
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def hash_util_encode(string: str) -> str:
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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 encode_stream(stream_id: int, stream_name: str) -> str:
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# We encode streams for urls as something like 99-Verona.
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stream_name = stream_name.replace(' ', '-')
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return str(stream_id) + '-' + hash_util_encode(stream_name)
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def pm_narrow_url(realm: Realm, participants: List[str]) -> str:
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participants.sort()
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base_url = "%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: Realm, stream: Stream) -> str:
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base_url = "%s/#narrow/stream/" % (realm.uri,)
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return base_url + encode_stream(stream.id, stream.name)
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def topic_narrow_url(realm: Realm, stream: Stream, topic: str) -> str:
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base_url = "%s/#narrow/stream/" % (realm.uri,)
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return "%s%s/topic/%s" % (base_url,
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encode_stream(stream.id, stream.name),
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hash_util_encode(topic))
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def relative_to_full_url(base_url: str, content: str) -> str:
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# Convert relative URLs to absolute URLs.
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fragment = lxml.html.fromstring(content)
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# We handle narrow URLs separately because of two reasons:
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# 1: 'lxml' seems to be having an issue in dealing with URLs that begin
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# `#` due to which it doesn't add a `/` before joining the base_url to
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# the relative URL.
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# 2: We also need to update the title attribute in the narrow links which
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# is not possible with `make_links_absolute()`.
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for link_info in fragment.iterlinks():
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elem, attrib, link, pos = link_info
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match = re.match("/?#narrow/", link)
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if match is not None:
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link = re.sub(r"^/?#narrow/", base_url + "/#narrow/", link)
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elem.set(attrib, link)
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# Only manually linked narrow URLs have title attribute set.
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if elem.get('title') is not None:
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elem.set('title', link)
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# Inline images can't be displayed in the emails as the request
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# from the mail server can't be authenticated because it has no
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# user_profile object linked to it. So we scrub the inline image
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# container.
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inline_image_containers = fragment.find_class("message_inline_image")
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for container in inline_image_containers:
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container.drop_tree()
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# The previous block handles most inline images, but for messages
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# where the entire markdown input was just the URL of an image
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# (i.e. the entire body is a message_inline_image object), the
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# entire message body will be that image element; here, we need a
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# more drastic edit to the content.
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if fragment.get('class') == 'message_inline_image':
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content_template = '<p><a href="%s" target="_blank" title="%s">%s</a></p>'
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image_link = fragment.find('a').get('href')
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image_title = fragment.find('a').get('title')
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new_content = (content_template % (image_link, image_title, image_link))
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fragment = lxml.html.fromstring(new_content)
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fragment.make_links_absolute(base_url)
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content = lxml.html.tostring(fragment).decode("utf-8")
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return content
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def fix_emojis(content: str, base_url: str, emojiset: str) -> str:
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def make_emoji_img_elem(emoji_span_elem: CSSSelector) -> Dict[str, Any]:
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# Convert the emoji spans to img tags.
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classes = emoji_span_elem.get('class')
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match = re.search(r'emoji-(?P<emoji_code>\S+)', classes)
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# re.search is capable of returning None,
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# but since the parent function should only be called with a valid css element
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# we assert that it does not.
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assert match is not None
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emoji_code = match.group('emoji_code')
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emoji_name = emoji_span_elem.get('title')
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alt_code = emoji_span_elem.text
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image_url = base_url + '/static/generated/emoji/images-%(emojiset)s-64/%(emoji_code)s.png' % {
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'emojiset': emojiset,
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'emoji_code': emoji_code
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}
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img_elem = lxml.html.fromstring(
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'<img alt="%(alt_code)s" src="%(image_url)s" title="%(title)s">' % {
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'alt_code': alt_code,
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'image_url': image_url,
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'title': emoji_name,
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})
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img_elem.set('style', 'height: 20px;')
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img_elem.tail = emoji_span_elem.tail
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return img_elem
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fragment = lxml.html.fromstring(content)
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for elem in fragment.cssselect('span.emoji'):
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parent = elem.getparent()
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img_elem = make_emoji_img_elem(elem)
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parent.replace(elem, img_elem)
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for realm_emoji in fragment.cssselect('.emoji'):
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del realm_emoji.attrib['class']
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realm_emoji.set('style', 'height: 20px;')
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content = lxml.html.tostring(fragment).decode('utf-8')
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return content
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def build_message_list(user_profile: UserProfile, messages: 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: Message) -> str:
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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 fix_plaintext_image_urls(content: str) -> str:
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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 build_message_payload(message: Message) -> Dict[str, str]:
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plain = message.content
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plain = fix_plaintext_image_urls(plain)
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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. We can't use `relative_to_full_url()`
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# function here because it uses a stricter regex which will not work for
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# plain text.
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plain = re.sub(
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r"/user_uploads/(\S*)",
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user_profile.realm.uri + r"/user_uploads/\1", 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(user_profile.realm.uri, html)
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html = fix_emojis(html, user_profile.realm.uri, user_profile.emojiset)
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return {'plain': plain, 'html': html}
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def build_sender_payload(message: 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: UserProfile, message: Message) -> Dict[str, Any]:
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if message.recipient.type == Recipient.PERSONAL:
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header = "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 = "<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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disp_recipient = get_display_recipient(message.recipient)
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assert not isinstance(disp_recipient, str)
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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 = "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 = "<a style='color: #ffffff;' href='%s'>%s</a>" % (html_link, header)
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else:
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stream = Stream.objects.only('id', 'name').get(id=message.recipient.type_id)
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header = "%s > %s" % (stream.name, message.topic_name())
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stream_link = stream_narrow_url(user_profile.realm, stream)
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topic_link = topic_narrow_url(user_profile.realm, stream, message.subject)
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header_html = "<a href='%s'>%s</a> > <a href='%s'>%s</a>" % (
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stream_link, stream.name, 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: UserProfile,
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missed_messages: List[Dict[str, Any]],
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message_count: 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 dictionaries to Message objects and other data
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for a group of messages that share a recipient (and topic)
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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['message'].recipient_id, msg['message'].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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'message_count': message_count,
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'unsubscribe_link': unsubscribe_link,
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'realm_name_in_notifications': user_profile.realm_name_in_notifications,
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'show_message_content': user_profile.message_content_in_email_notifications,
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})
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triggers = list(message['trigger'] for message in missed_messages)
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unique_triggers = set(triggers)
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context.update({
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'mention': 'mentioned' in unique_triggers,
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'mention_count': triggers.count('mentioned'),
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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]['message'])
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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['message'].sender for m in missed_messages))
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if (missed_messages[0]['message'].recipient.type == Recipient.HUDDLE):
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display_recipient = get_display_recipient(missed_messages[0]['message'].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, str)
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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 = "%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 = "%s, %s, and %s" % (
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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 = "%s, and %s others" % (
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', '.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]['message'].recipient.type == Recipient.PERSONAL):
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context.update({'private_message': True})
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elif context['mention']:
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# Keep only the senders who actually mentioned the user
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senders = list(set(m['message'].sender for m in missed_messages
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if m['trigger'] == 'mentioned'))
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# TODO: When we add wildcard mentions that send emails, we
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# should make sure the right logic applies here.
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elif ('stream_email_notify' in unique_triggers):
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context.update({'stream_email_notify': True})
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else:
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raise AssertionError("Invalid messages!")
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# If message content is disabled, then flush all information we pass to email.
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if not user_profile.message_content_in_email_notifications:
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context.update({
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'reply_to_zulip': False,
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'messages': [],
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'sender_str': "",
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'realm_str': user_profile.realm.name,
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'huddle_display_name': "",
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})
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else:
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context.update({
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'messages': build_message_list(user_profile, list(m['message'] for m in missed_messages)),
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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 = "Zulip missed messages" # type: str
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from_address = FromAddress.NOREPLY
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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_user_id': user_profile.id,
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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("email_senders", email_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: int,
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missed_email_events: Iterable[Dict[str, Any]]) -> None:
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message_ids = {event.get('message_id'): event.get('trigger') 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_email_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, str], List[Message]]
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for msg in messages:
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if msg.recipient.type == Recipient.PERSONAL:
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# For PM's group using (recipient, sender).
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messages_by_recipient_subject[(msg.recipient_id, msg.sender_id)].append(msg)
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else:
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messages_by_recipient_subject[(msg.recipient_id, msg.topic_name())].append(msg)
|
|
|
|
message_count_by_recipient_subject = {
|
|
recipient_subject: len(msgs)
|
|
for recipient_subject, msgs in messages_by_recipient_subject.items()
|
|
}
|
|
|
|
for msg_list in messages_by_recipient_subject.values():
|
|
msg = min(msg_list, key=lambda msg: msg.pub_date)
|
|
if msg.is_stream_message():
|
|
msg_list.extend(get_context_for_message(msg))
|
|
|
|
# Sort emails by least recently-active discussion.
|
|
recipient_subjects = [] # type: List[Tuple[Tuple[int, str], int]]
|
|
for recipient_subject, msg_list in messages_by_recipient_subject.items():
|
|
max_message_id = max(msg_list, key=lambda msg: msg.id).id
|
|
recipient_subjects.append((recipient_subject, max_message_id))
|
|
|
|
recipient_subjects = sorted(recipient_subjects, key=lambda x: x[1])
|
|
|
|
# Send an email per recipient subject pair
|
|
for recipient_subject, ignored_max_id in recipient_subjects:
|
|
unique_messages = {}
|
|
for m in messages_by_recipient_subject[recipient_subject]:
|
|
unique_messages[m.id] = dict(
|
|
message=m,
|
|
trigger=message_ids.get(m.id)
|
|
)
|
|
do_send_missedmessage_events_reply_in_zulip(
|
|
user_profile,
|
|
list(unique_messages.values()),
|
|
message_count_by_recipient_subject[recipient_subject],
|
|
)
|
|
|
|
def clear_scheduled_invitation_emails(email: str) -> None:
|
|
"""Unlike most scheduled emails, invitation emails don't have an
|
|
existing user object to key off of, so we filter by address here."""
|
|
items = ScheduledEmail.objects.filter(address__iexact=email,
|
|
type=ScheduledEmail.INVITATION_REMINDER)
|
|
items.delete()
|
|
|
|
def clear_scheduled_emails(user_id: int, email_type: Optional[int]=None) -> None:
|
|
items = ScheduledEmail.objects.filter(user_id=user_id)
|
|
if email_type is not None:
|
|
items = items.filter(type=email_type)
|
|
items.delete()
|
|
|
|
def log_digest_event(msg: str) -> None:
|
|
import logging
|
|
logging.basicConfig(filename=settings.DIGEST_LOG_PATH, level=logging.INFO)
|
|
logging.info(msg)
|
|
|
|
def followup_day2_email_delay(user: UserProfile) -> timedelta:
|
|
days_to_delay = 2
|
|
user_tz = user.timezone
|
|
if user_tz == '':
|
|
user_tz = 'UTC'
|
|
signup_day = user.date_joined.astimezone(pytz.timezone(user_tz)).isoweekday()
|
|
if signup_day == 5:
|
|
# If the day is Friday then delay should be till Monday
|
|
days_to_delay = 3
|
|
elif signup_day == 4:
|
|
# If the day is Thursday then delay should be till Friday
|
|
days_to_delay = 1
|
|
|
|
# The delay should be 1 hour before the above calculated delay as
|
|
# our goal is to maximize the chance that this email is near the top
|
|
# of the user's inbox when the user sits down to deal with their inbox,
|
|
# or comes in while they are dealing with their inbox.
|
|
return timedelta(days=days_to_delay, hours=-1)
|
|
|
|
def enqueue_welcome_emails(user: UserProfile) -> None:
|
|
from zerver.context_processors import common_context
|
|
if settings.WELCOME_EMAIL_SENDER is not None:
|
|
# line break to avoid triggering lint rule
|
|
from_name = settings.WELCOME_EMAIL_SENDER['name']
|
|
from_address = settings.WELCOME_EMAIL_SENDER['email']
|
|
else:
|
|
from_name = None
|
|
from_address = FromAddress.SUPPORT
|
|
|
|
unsubscribe_link = one_click_unsubscribe_link(user, "welcome")
|
|
context = common_context(user)
|
|
context.update({
|
|
'unsubscribe_link': unsubscribe_link,
|
|
'keyboard_shortcuts_link': user.realm.uri + '/help/keyboard-shortcuts',
|
|
})
|
|
if user.is_realm_admin:
|
|
context['user_role_group'] = _('admins')
|
|
context['getting_started_link'] = (user.realm.uri +
|
|
'/help/getting-your-organization-started-with-zulip')
|
|
else:
|
|
context['user_role_group'] = _('members')
|
|
context['getting_started_link'] = user.realm.uri + '/help/getting-started-with-zulip'
|
|
|
|
send_future_email(
|
|
"zerver/emails/followup_day1", user.realm, to_user_id=user.id, from_name=from_name,
|
|
from_address=from_address, context=context)
|
|
send_future_email(
|
|
"zerver/emails/followup_day2", user.realm, to_user_id=user.id, from_name=from_name,
|
|
from_address=from_address, context=context, delay=followup_day2_email_delay(user))
|
|
|
|
def convert_html_to_markdown(html: str) -> str:
|
|
# On Linux, the tool installs as html2markdown, and there's a command called
|
|
# html2text that does something totally different. On OSX, the tool installs
|
|
# as html2text.
|
|
commands = ["html2markdown", "html2text"]
|
|
|
|
for command in commands:
|
|
try:
|
|
# A body width of 0 means do not try to wrap the text for us.
|
|
p = subprocess.Popen(
|
|
[command, "--body-width=0"], stdout=subprocess.PIPE,
|
|
stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
|
|
break
|
|
except OSError:
|
|
continue
|
|
|
|
markdown = p.communicate(input=html.encode('utf-8'))[0].decode('utf-8').strip()
|
|
# We want images to get linked and inline previewed, but html2text will turn
|
|
# them into links of the form ``, which is
|
|
# ugly. Run a regex over the resulting description, turning links of the
|
|
# form `` into
|
|
# `[image.png](http://foo.com/image.png)`.
|
|
return re.sub("!\\[\\]\\((\\S*)/(\\S*)\\?(\\S*)\\)",
|
|
"[\\2](\\1/\\2)", markdown)
|