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zulip/zerver/lib/push_notifications.py

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# See https://zulip.readthedocs.io/en/latest/subsystems/notifications.html
import asyncio
import base64
import logging
import re
from dataclasses import dataclass
from functools import lru_cache
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Sequence, Tuple, Union
import gcm
import lxml.html
import orjson
from django.conf import settings
from django.db import IntegrityError, transaction
from django.db.models import F
from django.utils.timezone import now as timezone_now
from django.utils.translation import gettext as _
from django.utils.translation import override as override_language
from zerver.decorator import statsd_increment
from zerver.lib.avatar import absolute_avatar_url
from zerver.lib.exceptions import JsonableError
from zerver.lib.message import access_message, bulk_access_messages_expect_usermessage, huddle_users
from zerver.lib.remote_server import send_json_to_push_bouncer, send_to_push_bouncer
from zerver.lib.timestamp import datetime_to_timestamp
from zerver.lib.user_groups import access_user_group_by_id
from zerver.models import (
ArchivedMessage,
Message,
NotificationTriggers,
PushDeviceToken,
Recipient,
UserMessage,
UserProfile,
get_display_recipient,
get_user_profile_by_id,
receives_offline_push_notifications,
receives_online_push_notifications,
)
if TYPE_CHECKING:
import aioapns
logger = logging.getLogger(__name__)
if settings.ZILENCER_ENABLED:
from zilencer.models import RemotePushDeviceToken
DeviceToken = Union[PushDeviceToken, "RemotePushDeviceToken"]
# We store the token as b64, but apns-client wants hex strings
def b64_to_hex(data: str) -> str:
return base64.b64decode(data).hex()
def hex_to_b64(data: str) -> str:
return base64.b64encode(bytes.fromhex(data)).decode()
#
# Sending to APNs, for iOS
#
@dataclass
class APNsContext:
apns: "aioapns.APNs"
loop: asyncio.AbstractEventLoop
@lru_cache(maxsize=None)
def get_apns_context() -> Optional[APNsContext]:
# We lazily do this import as part of optimizing Zulip's base
# import time.
import aioapns
# aioapns logs at "error" level for every non-successful request,
# which fills the logs; see https://github.com/Fatal1ty/aioapns/issues/15
logging.getLogger("aioapns").setLevel(logging.CRITICAL)
if settings.APNS_CERT_FILE is None:
return None
# NB if called concurrently, this will make excess connections.
# That's a little sloppy, but harmless unless a server gets
# hammered with a ton of these all at once after startup.
loop = asyncio.new_event_loop()
apns = aioapns.APNs(
client_cert=settings.APNS_CERT_FILE,
topic=settings.APNS_TOPIC,
loop=loop,
use_sandbox=settings.APNS_SANDBOX,
)
return APNsContext(apns=apns, loop=loop)
def apns_enabled() -> bool:
return get_apns_context() is not None
def modernize_apns_payload(data: Dict[str, Any]) -> Dict[str, Any]:
"""Take a payload in an unknown Zulip version's format, and return in current format."""
# TODO this isn't super robust as is -- if a buggy remote server
# sends a malformed payload, we are likely to raise an exception.
if "message_ids" in data:
# The format sent by 1.6.0, from the earliest pre-1.6.0
# version with bouncer support up until 613d093d7 pre-1.7.0:
# 'alert': str, # just sender, and text about PM/group-PM/mention
# 'message_ids': List[int], # always just one
return {
"alert": data["alert"],
"badge": 0,
"custom": {
"zulip": {
"message_ids": data["message_ids"],
},
},
}
else:
# Something already compatible with the current format.
# `alert` may be a string, or a dict with `title` and `body`.
# In 1.7.0 and 1.7.1, before 0912b5ba8 pre-1.8.0, the only
# item in `custom.zulip` is `message_ids`.
return data
APNS_MAX_RETRIES = 3
@statsd_increment("apple_push_notification")
def send_apple_push_notification(
user_id: int, devices: Sequence[DeviceToken], payload_data: Dict[str, Any], remote: bool = False
) -> None:
if not devices:
return
# We lazily do the APNS imports as part of optimizing Zulip's base
# import time; since these are only needed in the push
# notification queue worker, it's best to only import them in the
# code that needs them.
import aioapns
import aioapns.exceptions
apns_context = get_apns_context()
if apns_context is None:
logger.debug(
"APNs: Dropping a notification because nothing configured. "
"Set PUSH_NOTIFICATION_BOUNCER_URL (or APNS_CERT_FILE)."
)
return
if remote:
assert settings.ZILENCER_ENABLED
DeviceTokenClass = RemotePushDeviceToken
else:
DeviceTokenClass = PushDeviceToken
logger.info("APNs: Sending notification for user %d to %d devices", user_id, len(devices))
payload_data = modernize_apns_payload(payload_data).copy()
message = {**payload_data.pop("custom", {}), "aps": payload_data}
retries_left = APNS_MAX_RETRIES
for device in devices:
# TODO obviously this should be made to actually use the async
request = aioapns.NotificationRequest(
device_token=device.token, message=message, time_to_live=24 * 3600
)
async def attempt_send() -> Optional[str]:
assert apns_context is not None
try:
result = await apns_context.apns.send_notification(request)
return "Success" if result.is_successful else result.description
except aioapns.exceptions.ConnectionClosed as e: # nocoverage
logger.warning(
"APNs: ConnectionClosed sending for user %d to device %s: %s",
user_id,
device.token,
e.__class__.__name__,
)
return None
except aioapns.exceptions.ConnectionError as e: # nocoverage
logger.warning(
"APNs: ConnectionError sending for user %d to device %s: %s",
user_id,
device.token,
e.__class__.__name__,
)
return None
result = apns_context.loop.run_until_complete(attempt_send())
while result is None and retries_left > 0:
retries_left -= 1
result = apns_context.loop.run_until_complete(attempt_send())
if result is None:
result = "HTTP error, retries exhausted"
if result == "Success":
logger.info("APNs: Success sending for user %d to device %s", user_id, device.token)
elif result in ["Unregistered", "BadDeviceToken", "DeviceTokenNotForTopic"]:
logger.info("APNs: Removing invalid/expired token %s (%s)", device.token, result)
# We remove all entries for this token (There
# could be multiple for different Zulip servers).
DeviceTokenClass.objects.filter(token=device.token, kind=DeviceTokenClass.APNS).delete()
else:
logger.warning(
"APNs: Failed to send for user %d to device %s: %s", user_id, device.token, result
)
#
# Sending to GCM, for Android
#
def make_gcm_client() -> gcm.GCM: # nocoverage
# From GCM upstream's doc for migrating to FCM:
#
# FCM supports HTTP and XMPP protocols that are virtually
# identical to the GCM server protocols, so you don't need to
# update your sending logic for the migration.
#
# https://developers.google.com/cloud-messaging/android/android-migrate-fcm
#
# The one thing we're required to change on the server is the URL of
# the endpoint. So we get to keep using the GCM client library we've
# been using (as long as we're happy with it) -- just monkey-patch in
# that one change, because the library's API doesn't anticipate that
# as a customization point.
gcm.gcm.GCM_URL = "https://fcm.googleapis.com/fcm/send"
return gcm.GCM(settings.ANDROID_GCM_API_KEY)
if settings.ANDROID_GCM_API_KEY: # nocoverage
gcm_client = make_gcm_client()
else:
gcm_client = None
def gcm_enabled() -> bool: # nocoverage
return gcm_client is not None
def send_android_push_notification_to_user(
user_profile: UserProfile, data: Dict[str, Any], options: Dict[str, Any]
) -> None:
devices = list(PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM))
send_android_push_notification(devices, data, options)
def parse_gcm_options(options: Dict[str, Any], data: Dict[str, Any]) -> str:
"""
Parse GCM options, supplying defaults, and raising an error if invalid.
The options permitted here form part of the Zulip notification
bouncer's API. They are:
`priority`: Passed through to GCM; see upstream doc linked below.
Zulip servers should always set this; when unset, we guess a value
based on the behavior of old server versions.
Including unrecognized options is an error.
For details on options' semantics, see this GCM upstream doc:
https://firebase.google.com/docs/cloud-messaging/http-server-ref
Returns `priority`.
"""
priority = options.pop("priority", None)
if priority is None:
# An older server. Identify if this seems to be an actual notification.
if data.get("event") == "message":
priority = "high"
else: # `'event': 'remove'`, presumably
priority = "normal"
if priority not in ("normal", "high"):
raise JsonableError(
_(
"Invalid GCM option to bouncer: priority {!r}",
).format(priority)
)
if options:
# We're strict about the API; there is no use case for a newer Zulip
# server talking to an older bouncer, so we only need to provide
# one-way compatibility.
raise JsonableError(
_(
"Invalid GCM options to bouncer: {}",
).format(orjson.dumps(options).decode())
)
return priority # when this grows a second option, can make it a tuple
@statsd_increment("android_push_notification")
def send_android_push_notification(
devices: Sequence[DeviceToken],
data: Dict[str, Any],
options: Dict[str, Any],
remote: bool = False,
) -> None:
"""
Send a GCM message to the given devices.
See https://firebase.google.com/docs/cloud-messaging/http-server-ref
for the GCM upstream API which this talks to.
data: The JSON object (decoded) to send as the 'data' parameter of
the GCM message.
options: Additional options to control the GCM message sent.
For details, see `parse_gcm_options`.
"""
if not devices:
return
if not gcm_client:
logger.debug(
"Skipping sending a GCM push notification since "
"PUSH_NOTIFICATION_BOUNCER_URL and ANDROID_GCM_API_KEY are both unset"
)
return
reg_ids = [device.token for device in devices]
priority = parse_gcm_options(options, data)
try:
# See https://firebase.google.com/docs/cloud-messaging/http-server-ref .
# Two kwargs `retries` and `session` get eaten by `json_request`;
# the rest pass through to the GCM server.
res = gcm_client.json_request(
registration_ids=reg_ids, priority=priority, data=data, retries=10
)
except OSError:
logger.warning("Error while pushing to GCM", exc_info=True)
return
if res and "success" in res:
for reg_id, msg_id in res["success"].items():
logger.info("GCM: Sent %s as %s", reg_id, msg_id)
if remote:
assert settings.ZILENCER_ENABLED
DeviceTokenClass = RemotePushDeviceToken
else:
DeviceTokenClass = PushDeviceToken
# res.canonical will contain results when there are duplicate registrations for the same
# device. The "canonical" registration is the latest registration made by the device.
# Ref: https://developer.android.com/google/gcm/adv.html#canonical
if "canonical" in res:
for reg_id, new_reg_id in res["canonical"].items():
if reg_id == new_reg_id:
# I'm not sure if this should happen. In any case, not really actionable.
logger.warning("GCM: Got canonical ref but it already matches our ID %s!", reg_id)
elif not DeviceTokenClass.objects.filter(
token=new_reg_id, kind=DeviceTokenClass.GCM
).count():
# This case shouldn't happen; any time we get a canonical ref it should have been
# previously registered in our system.
#
# That said, recovery is easy: just update the current PDT object to use the new ID.
logger.warning(
"GCM: Got canonical ref %s replacing %s but new ID not registered! Updating.",
new_reg_id,
reg_id,
)
DeviceTokenClass.objects.filter(token=reg_id, kind=DeviceTokenClass.GCM).update(
token=new_reg_id
)
else:
# Since we know the new ID is registered in our system we can just drop the old one.
logger.info("GCM: Got canonical ref %s, dropping %s", new_reg_id, reg_id)
DeviceTokenClass.objects.filter(token=reg_id, kind=DeviceTokenClass.GCM).delete()
if "errors" in res:
for error, reg_ids in res["errors"].items():
if error in ["NotRegistered", "InvalidRegistration"]:
for reg_id in reg_ids:
logger.info("GCM: Removing %s", reg_id)
# We remove all entries for this token (There
# could be multiple for different Zulip servers).
DeviceTokenClass.objects.filter(
token=reg_id, kind=DeviceTokenClass.GCM
).delete()
else:
for reg_id in reg_ids:
logger.warning("GCM: Delivery to %s failed: %s", reg_id, error)
# python-gcm handles retrying of the unsent messages.
# Ref: https://github.com/geeknam/python-gcm/blob/master/gcm/gcm.py#L497
#
# Sending to a bouncer
#
def uses_notification_bouncer() -> bool:
return settings.PUSH_NOTIFICATION_BOUNCER_URL is not None
def send_notifications_to_bouncer(
user_profile_id: int,
apns_payload: Dict[str, Any],
gcm_payload: Dict[str, Any],
gcm_options: Dict[str, Any],
) -> None:
post_data = {
"user_id": user_profile_id,
"apns_payload": apns_payload,
"gcm_payload": gcm_payload,
"gcm_options": gcm_options,
}
# Calls zilencer.views.remote_server_notify_push
send_json_to_push_bouncer("POST", "push/notify", post_data)
#
# Managing device tokens
#
def num_push_devices_for_user(user_profile: UserProfile, kind: Optional[int] = None) -> int:
if kind is None:
return PushDeviceToken.objects.filter(user=user_profile).count()
else:
return PushDeviceToken.objects.filter(user=user_profile, kind=kind).count()
def add_push_device_token(
user_profile: UserProfile, token_str: str, kind: int, ios_app_id: Optional[str] = None
) -> PushDeviceToken:
logger.info(
"Registering push device: %d %r %d %r", user_profile.id, token_str, kind, ios_app_id
)
# Regardless of whether we're using the push notifications
# bouncer, we want to store a PushDeviceToken record locally.
# These can be used to discern whether the user has any mobile
# devices configured, and is also where we will store encryption
# keys for mobile push notifications.
try:
with transaction.atomic():
token = PushDeviceToken.objects.create(
user_id=user_profile.id,
kind=kind,
token=token_str,
ios_app_id=ios_app_id,
# last_updated is to be renamed to date_created.
last_updated=timezone_now(),
)
except IntegrityError:
token = PushDeviceToken.objects.get(
user_id=user_profile.id,
kind=kind,
token=token_str,
)
# If we're sending things to the push notification bouncer
# register this user with them here
if uses_notification_bouncer():
post_data = {
"server_uuid": settings.ZULIP_ORG_ID,
"user_id": user_profile.id,
"token": token_str,
"token_kind": kind,
}
if kind == PushDeviceToken.APNS:
post_data["ios_app_id"] = ios_app_id
logger.info("Sending new push device to bouncer: %r", post_data)
# Calls zilencer.views.register_remote_push_device
send_to_push_bouncer("POST", "push/register", post_data)
return token
def remove_push_device_token(user_profile: UserProfile, token_str: str, kind: int) -> None:
try:
token = PushDeviceToken.objects.get(token=token_str, kind=kind, user=user_profile)
token.delete()
except PushDeviceToken.DoesNotExist:
# If we are using bouncer, don't raise the exception. It will
# be raised by the code below eventually. This is important
# during the transition period after upgrading to a version
# that stores local PushDeviceToken objects even when using
# the push notifications bouncer.
if not uses_notification_bouncer():
raise JsonableError(_("Token does not exist"))
# If we're sending things to the push notification bouncer
# unregister this user with them here
if uses_notification_bouncer():
# TODO: Make this a remove item
post_data = {
"server_uuid": settings.ZULIP_ORG_ID,
"user_id": user_profile.id,
"token": token_str,
"token_kind": kind,
}
# Calls zilencer.views.unregister_remote_push_device
send_to_push_bouncer("POST", "push/unregister", post_data)
def clear_push_device_tokens(user_profile_id: int) -> None:
# Deletes all of a user's PushDeviceTokens.
if uses_notification_bouncer():
post_data = {
"server_uuid": settings.ZULIP_ORG_ID,
"user_id": user_profile_id,
}
send_to_push_bouncer("POST", "push/unregister/all", post_data)
return
PushDeviceToken.objects.filter(user_id=user_profile_id).delete()
#
# Push notifications in general
#
def push_notifications_enabled() -> bool:
"""True just if this server has configured a way to send push notifications."""
if (
uses_notification_bouncer()
and settings.ZULIP_ORG_KEY is not None
and settings.ZULIP_ORG_ID is not None
): # nocoverage
# We have the needed configuration to send push notifications through
# the bouncer. Better yet would be to confirm that this config actually
# works -- e.g., that we have ever successfully sent to the bouncer --
# but this is a good start.
return True
if settings.DEVELOPMENT and (apns_enabled() or gcm_enabled()): # nocoverage
# Since much of the notifications logic is platform-specific, the mobile
# developers often work on just one platform at a time, so we should
# only require one to be configured.
return True
elif apns_enabled() and gcm_enabled(): # nocoverage
# We have the needed configuration to send through APNs and GCM directly
# (i.e., we are the bouncer, presumably.) Again, assume it actually works.
return True
return False
def initialize_push_notifications() -> None:
if not push_notifications_enabled():
if settings.DEVELOPMENT and not settings.TEST_SUITE: # nocoverage
# Avoid unnecessary spam on development environment startup
return
logger.warning(
"Mobile push notifications are not configured.\n "
"See https://zulip.readthedocs.io/en/latest/"
"production/mobile-push-notifications.html"
)
def get_gcm_alert(message: Message, mentioned_user_group_name: Optional[str] = None) -> str:
"""
Determine what alert string to display based on the missed messages.
"""
sender_str = message.sender.full_name
display_recipient = get_display_recipient(message.recipient)
if (
message.recipient.type == Recipient.HUDDLE
and message.trigger == NotificationTriggers.PRIVATE_MESSAGE
):
return f"New private group message from {sender_str}"
elif (
message.recipient.type == Recipient.PERSONAL
and message.trigger == NotificationTriggers.PRIVATE_MESSAGE
):
return f"New private message from {sender_str}"
elif message.is_stream_message() and message.trigger == NotificationTriggers.MENTION:
if mentioned_user_group_name is None:
return f"{sender_str} mentioned you in #{display_recipient}"
else:
return f"{sender_str} mentioned @{mentioned_user_group_name} in #{display_recipient}"
elif message.is_stream_message() and message.trigger == NotificationTriggers.WILDCARD_MENTION:
return f"{sender_str} mentioned everyone in #{display_recipient}"
else:
assert message.is_stream_message() and message.trigger == NotificationTriggers.STREAM_PUSH
return f"New stream message from {sender_str} in #{display_recipient}"
def get_mobile_push_content(rendered_content: str) -> str:
def get_text(elem: lxml.html.HtmlElement) -> str:
# Convert default emojis to their Unicode equivalent.
classes = elem.get("class", "")
if "emoji" in classes:
match = re.search(r"emoji-(?P<emoji_code>\S+)", classes)
if match:
emoji_code = match.group("emoji_code")
char_repr = ""
for codepoint in emoji_code.split("-"):
char_repr += chr(int(codepoint, 16))
return char_repr
# Handles realm emojis, avatars etc.
if elem.tag == "img":
return elem.get("alt", "")
if elem.tag == "blockquote":
return "" # To avoid empty line before quote text
return elem.text or ""
def format_as_quote(quote_text: str) -> str:
return "".join(
f"> {line}\n" for line in quote_text.splitlines() if line # Remove empty lines
)
def render_olist(ol: lxml.html.HtmlElement) -> str:
items = []
counter = int(ol.get("start")) if ol.get("start") else 1
nested_levels = len(list(ol.iterancestors("ol")))
indent = ("\n" + " " * nested_levels) if nested_levels else ""
for li in ol:
items.append(indent + str(counter) + ". " + process(li).strip())
counter += 1
return "\n".join(items)
def render_spoiler(elem: lxml.html.HtmlElement) -> str:
header = elem.find_class("spoiler-header")[0]
text = process(header).strip()
if len(text) == 0:
return "(…)\n"
return f"{text} (…)\n"
def process(elem: lxml.html.HtmlElement) -> str:
plain_text = ""
if elem.tag == "ol":
plain_text = render_olist(elem)
elif "spoiler-block" in elem.get("class", ""):
plain_text += render_spoiler(elem)
else:
plain_text = get_text(elem)
sub_text = ""
for child in elem:
sub_text += process(child)
if elem.tag == "blockquote":
sub_text = format_as_quote(sub_text)
plain_text += sub_text
plain_text += elem.tail or ""
return plain_text
if settings.PUSH_NOTIFICATION_REDACT_CONTENT:
return (
"*"
+ _(
"This organization has disabled including message content in mobile push notifications"
)
+ "*"
)
elem = lxml.html.fromstring(rendered_content)
plain_text = process(elem)
return plain_text
def truncate_content(content: str) -> Tuple[str, bool]:
# We use Unicode character 'HORIZONTAL ELLIPSIS' (U+2026) instead
# of three dots as this saves two extra characters for textual
# content. This function will need to be updated to handle Unicode
# combining characters and tags when we start supporting themself.
if len(content) <= 200:
return content, False
return content[:200] + "…", True
def get_base_payload(user_profile: UserProfile) -> Dict[str, Any]:
"""Common fields for all notification payloads."""
data: Dict[str, Any] = {}
# These will let the app support logging into multiple realms and servers.
data["server"] = settings.EXTERNAL_HOST
data["realm_id"] = user_profile.realm.id
data["realm_uri"] = user_profile.realm.uri
data["user_id"] = user_profile.id
return data
def get_message_payload(
user_profile: UserProfile,
message: Message,
mentioned_user_group_id: Optional[int] = None,
mentioned_user_group_name: Optional[str] = None,
) -> Dict[str, Any]:
"""Common fields for `message` payloads, for all platforms."""
data = get_base_payload(user_profile)
# `sender_id` is preferred, but some existing versions use `sender_email`.
data["sender_id"] = message.sender.id
data["sender_email"] = message.sender.email
if mentioned_user_group_id is not None:
assert mentioned_user_group_name is not None
data["mentioned_user_group_id"] = mentioned_user_group_id
data["mentioned_user_group_name"] = mentioned_user_group_name
if message.recipient.type == Recipient.STREAM:
data["recipient_type"] = "stream"
data["stream"] = get_display_recipient(message.recipient)
data["topic"] = message.topic_name()
elif message.recipient.type == Recipient.HUDDLE:
data["recipient_type"] = "private"
data["pm_users"] = huddle_users(message.recipient.id)
else: # Recipient.PERSONAL
data["recipient_type"] = "private"
return data
def get_apns_alert_title(message: Message) -> str:
"""
On an iOS notification, this is the first bolded line.
"""
if message.recipient.type == Recipient.HUDDLE:
recipients = get_display_recipient(message.recipient)
assert isinstance(recipients, list)
return ", ".join(sorted(r["full_name"] for r in recipients))
elif message.is_stream_message():
return f"#{get_display_recipient(message.recipient)} > {message.topic_name()}"
# For personal PMs, we just show the sender name.
return message.sender.full_name
def get_apns_alert_subtitle(
user_profile: UserProfile, message: Message, mentioned_user_group_name: Optional[str] = None
) -> str:
"""
On an iOS notification, this is the second bolded line.
"""
if message.trigger == NotificationTriggers.MENTION:
if mentioned_user_group_name is not None:
return _("{full_name} mentioned @{user_group_name}:").format(
full_name=message.sender.full_name, user_group_name=mentioned_user_group_name
)
else:
return _("{full_name} mentioned you:").format(full_name=message.sender.full_name)
elif message.trigger == NotificationTriggers.WILDCARD_MENTION:
return _("{full_name} mentioned everyone:").format(full_name=message.sender.full_name)
elif message.recipient.type == Recipient.PERSONAL:
return ""
# For group PMs, or regular messages to a stream, just use a colon to indicate this is the sender.
return message.sender.full_name + ":"
def get_apns_badge_count(
user_profile: UserProfile, read_messages_ids: Optional[Sequence[int]] = []
) -> int:
# NOTE: We have temporarily set get_apns_badge_count to always
# return 0 until we can debug a likely mobile app side issue with
# handling notifications while the app is open.
return 0
def get_apns_badge_count_future(
user_profile: UserProfile, read_messages_ids: Optional[Sequence[int]] = []
) -> int:
# Future implementation of get_apns_badge_count; unused but
# we expect to use this once we resolve client-side bugs.
return (
UserMessage.objects.filter(user_profile=user_profile)
.extra(where=[UserMessage.where_active_push_notification()])
.exclude(
# If we've just marked some messages as read, they're still
# marked as having active notifications; we'll clear that flag
# only after we've sent that update to the devices. So we need
# to exclude them explicitly from the count.
message_id__in=read_messages_ids
)
.count()
)
def get_message_payload_apns(
user_profile: UserProfile,
message: Message,
mentioned_user_group_id: Optional[int] = None,
mentioned_user_group_name: Optional[str] = None,
) -> Dict[str, Any]:
"""A `message` payload for iOS, via APNs."""
zulip_data = get_message_payload(
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
)
zulip_data.update(
message_ids=[message.id],
)
assert message.rendered_content is not None
with override_language(user_profile.default_language):
content, _ = truncate_content(get_mobile_push_content(message.rendered_content))
apns_data = {
"alert": {
"title": get_apns_alert_title(message),
"subtitle": get_apns_alert_subtitle(
user_profile, message, mentioned_user_group_name
),
"body": content,
},
"sound": "default",
"badge": get_apns_badge_count(user_profile),
"custom": {"zulip": zulip_data},
}
return apns_data
def get_message_payload_gcm(
user_profile: UserProfile,
message: Message,
mentioned_user_group_id: Optional[int] = None,
mentioned_user_group_name: Optional[str] = None,
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
"""A `message` payload + options, for Android via GCM/FCM."""
data = get_message_payload(
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
)
assert message.rendered_content is not None
with override_language(user_profile.default_language):
content, truncated = truncate_content(get_mobile_push_content(message.rendered_content))
data.update(
event="message",
alert=get_gcm_alert(message, mentioned_user_group_name),
zulip_message_id=message.id, # message_id is reserved for CCS
time=datetime_to_timestamp(message.date_sent),
content=content,
content_truncated=truncated,
sender_full_name=message.sender.full_name,
sender_avatar_url=absolute_avatar_url(message.sender),
)
gcm_options = {"priority": "high"}
return data, gcm_options
def get_remove_payload_gcm(
user_profile: UserProfile,
message_ids: List[int],
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
"""A `remove` payload + options, for Android via GCM/FCM."""
gcm_payload = get_base_payload(user_profile)
gcm_payload.update(
event="remove",
zulip_message_ids=",".join(str(id) for id in message_ids),
# Older clients (all clients older than 2019-02-13) look only at
# `zulip_message_id` and ignore `zulip_message_ids`. Do our best.
zulip_message_id=message_ids[0],
)
gcm_options = {"priority": "normal"}
return gcm_payload, gcm_options
def get_remove_payload_apns(user_profile: UserProfile, message_ids: List[int]) -> Dict[str, Any]:
zulip_data = get_base_payload(user_profile)
zulip_data.update(
event="remove",
zulip_message_ids=",".join(str(id) for id in message_ids),
)
apns_data = {
"badge": get_apns_badge_count(user_profile, message_ids),
"custom": {"zulip": zulip_data},
}
return apns_data
def handle_remove_push_notification(user_profile_id: int, message_ids: List[int]) -> None:
"""This should be called when a message that previously had a
mobile push notification executed is read. This triggers a push to the
mobile app, when the message is read on the server, to remove the
message from the notification.
"""
user_profile = get_user_profile_by_id(user_profile_id)
message_ids = bulk_access_messages_expect_usermessage(user_profile_id, message_ids)
gcm_payload, gcm_options = get_remove_payload_gcm(user_profile, message_ids)
apns_payload = get_remove_payload_apns(user_profile, message_ids)
if uses_notification_bouncer():
send_notifications_to_bouncer(user_profile_id, apns_payload, gcm_payload, gcm_options)
else:
android_devices = list(
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM)
)
apple_devices = list(
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.APNS)
)
if android_devices:
send_android_push_notification(android_devices, gcm_payload, gcm_options)
if apple_devices:
send_apple_push_notification(user_profile_id, apple_devices, apns_payload)
UserMessage.objects.filter(
user_profile_id=user_profile_id,
message_id__in=message_ids,
).update(flags=F("flags").bitand(~UserMessage.flags.active_mobile_push_notification))
@statsd_increment("push_notifications")
def handle_push_notification(user_profile_id: int, missed_message: Dict[str, Any]) -> None:
"""
missed_message is the event received by the
zerver.worker.queue_processors.PushNotificationWorker.consume function.
"""
if not push_notifications_enabled():
return
user_profile = get_user_profile_by_id(user_profile_id)
if not (
receives_offline_push_notifications(user_profile)
or receives_online_push_notifications(user_profile)
):
return
try:
(message, user_message) = access_message(user_profile, missed_message["message_id"])
except JsonableError:
if ArchivedMessage.objects.filter(id=missed_message["message_id"]).exists():
# If the cause is a race with the message being deleted,
# that's normal and we have no need to log an error.
return
logging.info(
"Unexpected message access failure handling push notifications: %s %s",
user_profile.id,
missed_message["message_id"],
)
return
if user_message is not None:
# If the user has read the message already, don't push-notify.
if user_message.flags.read or user_message.flags.active_mobile_push_notification:
return
# Otherwise, we mark the message as having an active mobile
# push notification, so that we can send revocation messages
# later.
user_message.flags.active_mobile_push_notification = True
user_message.save(update_fields=["flags"])
else:
# Users should only be getting push notifications into this
# queue for messages they haven't received if they're
# long-term idle; anything else is likely a bug.
if not user_profile.long_term_idle:
logger.error(
"Could not find UserMessage with message_id %s and user_id %s",
missed_message["message_id"],
user_profile_id,
exc_info=True,
)
return
message.trigger = missed_message["trigger"]
mentioned_user_group_name = None
mentioned_user_group_id = missed_message.get("mentioned_user_group_id")
if mentioned_user_group_id is not None:
user_group = access_user_group_by_id(mentioned_user_group_id, user_profile)
mentioned_user_group_name = user_group.name
apns_payload = get_message_payload_apns(
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
)
gcm_payload, gcm_options = get_message_payload_gcm(
user_profile, message, mentioned_user_group_id, mentioned_user_group_name
)
logger.info("Sending push notifications to mobile clients for user %s", user_profile_id)
if uses_notification_bouncer():
send_notifications_to_bouncer(user_profile_id, apns_payload, gcm_payload, gcm_options)
return
android_devices = list(
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.GCM)
)
apple_devices = list(
PushDeviceToken.objects.filter(user=user_profile, kind=PushDeviceToken.APNS)
)
send_apple_push_notification(user_profile.id, apple_devices, apns_payload)
send_android_push_notification(android_devices, gcm_payload, gcm_options)
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