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zulip/zerver/models.py

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from __future__ import absolute_import
from typing import Any, Dict, List, Set, Tuple, TypeVar, \
Union, Optional, Sequence, AbstractSet
from typing.re import Match
from zerver.lib.str_utils import NonBinaryStr
from django.db import models
from django.db.models.query import QuerySet
from django.db.models import Manager
from django.conf import settings
from django.contrib.auth.models import AbstractBaseUser, UserManager, \
PermissionsMixin
from django.dispatch import receiver
from zerver.lib.cache import cache_with_key, flush_user_profile, flush_realm, \
user_profile_by_id_cache_key, user_profile_by_email_cache_key, \
generic_bulk_cached_fetch, cache_set, flush_stream, \
display_recipient_cache_key, cache_delete, \
get_stream_cache_key, active_user_dicts_in_realm_cache_key, \
active_bot_dicts_in_realm_cache_key, active_user_dict_fields, \
active_bot_dict_fields, flush_message
from zerver.lib.utils import make_safe_digest, generate_random_token
from zerver.lib.str_utils import ModelReprMixin
from django.db import transaction
from zerver.lib.camo import get_camo_url
from django.utils import timezone
from django.contrib.sessions.models import Session
from zerver.lib.timestamp import datetime_to_timestamp
from django.db.models.signals import pre_save, post_save, post_delete
from django.core.validators import MinLengthValidator, RegexValidator
from django.utils.translation import ugettext_lazy as _
from bitfield import BitField
from bitfield.types import BitHandler
from collections import defaultdict
from datetime import timedelta
import pylibmc
import re
import logging
from six import text_type
import time
import datetime
MAX_SUBJECT_LENGTH = 60
MAX_MESSAGE_LENGTH = 10000
MAX_LANGUAGE_ID_LENGTH = 50 # type: int
STREAM_NAMES = TypeVar('STREAM_NAMES', Sequence[text_type], AbstractSet[text_type])
# Doing 1000 remote cache requests to get_display_recipient is quite slow,
# so add a local cache as well as the remote cache cache.
per_request_display_recipient_cache = {} # type: Dict[int, List[Dict[str, Any]]]
def get_display_recipient_by_id(recipient_id, recipient_type, recipient_type_id):
# type: (int, int, int) -> Union[text_type, List[Dict[str, Any]]]
if recipient_id not in per_request_display_recipient_cache:
result = get_display_recipient_remote_cache(recipient_id, recipient_type, recipient_type_id)
per_request_display_recipient_cache[recipient_id] = result
return per_request_display_recipient_cache[recipient_id]
def get_display_recipient(recipient):
# type: (Recipient) -> Union[text_type, List[Dict[str, Any]]]
return get_display_recipient_by_id(
recipient.id,
recipient.type,
recipient.type_id
)
def flush_per_request_caches():
# type: () -> None
global per_request_display_recipient_cache
per_request_display_recipient_cache = {}
global per_request_realm_filters_cache
per_request_realm_filters_cache = {}
@cache_with_key(lambda *args: display_recipient_cache_key(args[0]),
timeout=3600*24*7)
def get_display_recipient_remote_cache(recipient_id, recipient_type, recipient_type_id):
# type: (int, int, int) -> Union[text_type, List[Dict[str, Any]]]
"""
returns: an appropriate object describing the recipient. For a
stream this will be the stream name as a string. For a huddle or
personal, it will be an array of dicts about each recipient.
"""
if recipient_type == Recipient.STREAM:
stream = Stream.objects.get(id=recipient_type_id)
return stream.name
# We don't really care what the ordering is, just that it's deterministic.
user_profile_list = (UserProfile.objects.filter(subscription__recipient_id=recipient_id)
.select_related()
.order_by('email'))
return [{'email': user_profile.email,
'domain': user_profile.realm.domain,
'full_name': user_profile.full_name,
'short_name': user_profile.short_name,
'id': user_profile.id,
'is_mirror_dummy': user_profile.is_mirror_dummy,} for user_profile in user_profile_list]
def completely_open(domain):
# type: (text_type) -> bool
# This domain is completely open to everyone on the internet to
# join. E-mail addresses do not need to match the domain and
# an invite from an existing user is not required.
realm = get_realm(domain)
if not realm:
return False
return not realm.invite_required and not realm.restricted_to_domain
def get_unique_open_realm():
# type: () -> Optional[Realm]
"""We only return a realm if there is a unique non-system-only realm
and it is completely open."""
realms = Realm.objects.filter(deactivated=False)
# On production installations, the (usually "zulip.com") system
# realm is an empty realm just used for system bots, so don't
# include it in this accounting.
realms = realms.exclude(domain__in=settings.SYSTEM_ONLY_REALMS)
if len(realms) != 1:
return None
realm = realms[0]
if realm.invite_required or realm.restricted_to_domain:
return None
return realm
def get_realm_emoji_cache_key(realm):
# type: (Realm) -> text_type
return u'realm_emoji:%s' % (realm.id,)
def name_changes_disabled(realm):
# type: (Optional[Realm]) -> bool
if realm is None:
return settings.NAME_CHANGES_DISABLED
return settings.NAME_CHANGES_DISABLED or realm.name_changes_disabled
class Realm(ModelReprMixin, models.Model):
# domain is a domain in the Internet sense. It must be structured like a
# valid email domain. We use is to restrict access, identify bots, etc.
domain = models.CharField(max_length=40, db_index=True, unique=True) # type: text_type
# name is the user-visible identifier for the realm. It has no required
# structure.
name = models.CharField(max_length=40, null=True) # type: Optional[text_type]
subdomain = models.CharField(max_length=40, null=True, unique=True) # type: Optional[text_type]
restricted_to_domain = models.BooleanField(default=True) # type: bool
invite_required = models.BooleanField(default=False) # type: bool
invite_by_admins_only = models.BooleanField(default=False) # type: bool
create_stream_by_admins_only = models.BooleanField(default=False) # type: bool
mandatory_topics = models.BooleanField(default=False) # type: bool
show_digest_email = models.BooleanField(default=True) # type: bool
name_changes_disabled = models.BooleanField(default=False) # type: bool
allow_message_editing = models.BooleanField(default=True) # type: bool
DEFAULT_MESSAGE_CONTENT_EDIT_LIMIT_SECONDS = 600 # if changed, also change in admin.js
message_content_edit_limit_seconds = models.IntegerField(default=DEFAULT_MESSAGE_CONTENT_EDIT_LIMIT_SECONDS) # type: int
# Valid org_types are {CORPORATE, COMMUNITY}
CORPORATE = 1
COMMUNITY = 2
org_type = models.PositiveSmallIntegerField(default=CORPORATE) # type: int
date_created = models.DateTimeField(default=timezone.now) # type: datetime.datetime
notifications_stream = models.ForeignKey('Stream', related_name='+', null=True, blank=True) # type: Optional[Stream]
deactivated = models.BooleanField(default=False) # type: bool
default_language = models.CharField(default=u'en', max_length=MAX_LANGUAGE_ID_LENGTH) # type: text_type
DEFAULT_NOTIFICATION_STREAM_NAME = u'announce'
def __unicode__(self):
# type: () -> text_type
return u"<Realm: %s %s>" % (self.domain, self.id)
@cache_with_key(get_realm_emoji_cache_key, timeout=3600*24*7)
def get_emoji(self):
# type: () -> Dict[text_type, Dict[str, text_type]]
return get_realm_emoji_uncached(self)
@property
def deployment(self):
# type: () -> Any # returns a Deployment from zilencer.models
# see https://github.com/zulip/zulip/issues/1845 before you
# attempt to add test coverage for this method, as we may
# be revisiting the deployments model soon
try:
return self._deployments.all()[0]
except IndexError:
return None
@deployment.setter # type: ignore # https://github.com/python/mypy/issues/220
def set_deployments(self, value):
# type: (Any) -> None
self._deployments = [value] # type: Any
def get_admin_users(self):
# type: () -> Sequence[UserProfile]
# TODO: Change return type to QuerySet[UserProfile]
return UserProfile.objects.filter(realm=self, is_realm_admin=True,
is_active=True).select_related()
def get_active_users(self):
# type: () -> Sequence[UserProfile]
# TODO: Change return type to QuerySet[UserProfile]
return UserProfile.objects.filter(realm=self, is_active=True).select_related()
@property
def uri(self):
# type: () -> str
if settings.REALMS_HAVE_SUBDOMAINS and self.subdomain is not None:
return '%s%s.%s' % (settings.EXTERNAL_URI_SCHEME,
self.subdomain, settings.EXTERNAL_HOST)
return settings.SERVER_URI
@property
def host(self):
# type: () -> str
if settings.REALMS_HAVE_SUBDOMAINS and self.subdomain is not None:
return "%s.%s" % (self.subdomain, settings.EXTERNAL_HOST)
return settings.EXTERNAL_HOST
@property
def is_zephyr_mirror_realm(self):
# type: () -> bool
return self.domain == "mit.edu"
@property
def webathena_enabled(self):
# type: () -> bool
return self.is_zephyr_mirror_realm
@property
def presence_disabled(self):
# type: () -> bool
return self.is_zephyr_mirror_realm
class Meta(object):
permissions = (
('administer', "Administer a realm"),
('api_super_user', "Can send messages as other users for mirroring"),
)
post_save.connect(flush_realm, sender=Realm)
class RealmAlias(models.Model):
realm = models.ForeignKey(Realm, null=True) # type: Optional[Realm]
# should always be stored lowercase
domain = models.CharField(max_length=80, db_index=True, unique=True) # type: text_type
# These functions should only be used on email addresses that have
# been validated via django.core.validators.validate_email
#
# Note that we need to use some care, since can you have multiple @-signs; e.g.
# "tabbott@test"@zulip.com
# is valid email address
def email_to_username(email):
# type: (text_type) -> text_type
return "@".join(email.split("@")[:-1]).lower()
# Returns the raw domain portion of the desired email address
def split_email_to_domain(email):
# type: (text_type) -> text_type
return email.split("@")[-1].lower()
# Returns the domain, potentually de-aliased, for the realm
# that this user's email is in
def resolve_email_to_domain(email):
# type: (text_type) -> text_type
domain = split_email_to_domain(email)
alias = alias_for_realm(domain)
if alias is not None:
domain = alias.realm.domain
return domain
def resolve_subdomain_to_realm(subdomain):
# type: (text_type) -> Optional[Realm]
try:
return Realm.objects.get(subdomain=subdomain)
except Realm.DoesNotExist:
return None
# Is a user with the given email address allowed to be in the given realm?
# (This function does not check whether the user has been invited to the realm.
# So for invite-only realms, this is the test for whether a user can be invited,
# not whether the user can sign up currently.)
def email_allowed_for_realm(email, realm):
# type: (text_type, Realm) -> bool
# Anyone can be in an open realm
if not realm.restricted_to_domain:
return True
# Otherwise, domains must match (case-insensitively)
email_domain = resolve_email_to_domain(email)
return email_domain == realm.domain.lower()
def alias_for_realm(domain):
# type: (text_type) -> Optional[RealmAlias]
try:
return RealmAlias.objects.get(domain=domain)
except RealmAlias.DoesNotExist:
return None
def list_of_domains_for_realm(realm):
# type: (Realm) -> List[text_type]
return list(RealmAlias.objects.filter(realm = realm).values_list('domain', flat=True))
def remote_user_to_email(remote_user):
# type: (text_type) -> text_type
if settings.SSO_APPEND_DOMAIN is not None:
remote_user += "@" + settings.SSO_APPEND_DOMAIN
return remote_user
class RealmEmoji(ModelReprMixin, models.Model):
realm = models.ForeignKey(Realm) # type: Realm
# Second part of the regex (negative lookbehind) disallows names ending with one of the punctuation characters
name = models.TextField(validators=[MinLengthValidator(1),
RegexValidator(regex=r'^[0-9a-zA-Z.\-_]+(?<![.\-_])$',
message=_("Invalid characters in Emoji name"))]) # type: text_type
# URLs start having browser compatibility problem below 2000
# characters, so 1000 seems like a safe limit.
img_url = models.URLField(max_length=1000) # type: text_type
class Meta(object):
unique_together = ("realm", "name")
def __unicode__(self):
# type: () -> text_type
return u"<RealmEmoji(%s): %s %s>" % (self.realm.domain, self.name, self.img_url)
def get_realm_emoji_uncached(realm):
# type: (Realm) -> Dict[text_type, Dict[str, text_type]]
d = {}
for row in RealmEmoji.objects.filter(realm=realm):
d[row.name] = dict(source_url=row.img_url,
display_url=get_camo_url(row.img_url))
return d
def flush_realm_emoji(sender, **kwargs):
# type: (Any, **Any) -> None
realm = kwargs['instance'].realm
cache_set(get_realm_emoji_cache_key(realm),
get_realm_emoji_uncached(realm),
timeout=3600*24*7)
post_save.connect(flush_realm_emoji, sender=RealmEmoji)
post_delete.connect(flush_realm_emoji, sender=RealmEmoji)
class RealmFilter(ModelReprMixin, models.Model):
realm = models.ForeignKey(Realm) # type: Realm
pattern = models.TextField() # type: text_type
url_format_string = models.TextField() # type: text_type
class Meta(object):
unique_together = ("realm", "pattern")
def __unicode__(self):
# type: () -> text_type
return u"<RealmFilter(%s): %s %s>" % (self.realm.domain, self.pattern, self.url_format_string)
def get_realm_filters_cache_key(domain):
# type: (text_type) -> text_type
return u'all_realm_filters:%s' % (domain,)
# We have a per-process cache to avoid doing 1000 remote cache queries during page load
per_request_realm_filters_cache = {} # type: Dict[text_type, List[Tuple[text_type, text_type]]]
def domain_in_local_realm_filters_cache(domain):
# type: (text_type) -> bool
return domain in per_request_realm_filters_cache
def realm_filters_for_domain(domain):
# type: (text_type) -> List[Tuple[text_type, text_type]]
domain = domain.lower()
if not domain_in_local_realm_filters_cache(domain):
per_request_realm_filters_cache[domain] = realm_filters_for_domain_remote_cache(domain)
return per_request_realm_filters_cache[domain]
@cache_with_key(get_realm_filters_cache_key, timeout=3600*24*7)
def realm_filters_for_domain_remote_cache(domain):
# type: (text_type) -> List[Tuple[text_type, text_type]]
filters = []
for realm_filter in RealmFilter.objects.filter(realm=get_realm(domain)):
filters.append((realm_filter.pattern, realm_filter.url_format_string))
return filters
def all_realm_filters():
# type: () -> Dict[text_type, List[Tuple[text_type, text_type]]]
filters = defaultdict(list) # type: Dict[text_type, List[Tuple[text_type, text_type]]]
for realm_filter in RealmFilter.objects.all():
filters[realm_filter.realm.domain].append((realm_filter.pattern, realm_filter.url_format_string))
return filters
def flush_realm_filter(sender, **kwargs):
# type: (Any, **Any) -> None
realm = kwargs['instance'].realm
cache_delete(get_realm_filters_cache_key(realm.domain))
try:
per_request_realm_filters_cache.pop(realm.domain.lower())
except KeyError:
pass
post_save.connect(flush_realm_filter, sender=RealmFilter)
post_delete.connect(flush_realm_filter, sender=RealmFilter)
class UserProfile(ModelReprMixin, AbstractBaseUser, PermissionsMixin):
DEFAULT_BOT = 1
"""
Incoming webhook bots are limited to only sending messages via webhooks.
Thus, it is less of a security risk to expose their API keys to third-party services,
since they can't be used to read messages.
"""
INCOMING_WEBHOOK_BOT = 2
# Fields from models.AbstractUser minus last_name and first_name,
# which we don't use; email is modified to make it indexed and unique.
email = models.EmailField(blank=False, db_index=True, unique=True) # type: text_type
is_staff = models.BooleanField(default=False) # type: bool
is_active = models.BooleanField(default=True, db_index=True) # type: bool
is_realm_admin = models.BooleanField(default=False, db_index=True) # type: bool
is_bot = models.BooleanField(default=False, db_index=True) # type: bool
bot_type = models.PositiveSmallIntegerField(null=True, db_index=True) # type: Optional[int]
is_api_super_user = models.BooleanField(default=False, db_index=True) # type: bool
date_joined = models.DateTimeField(default=timezone.now) # type: datetime.datetime
is_mirror_dummy = models.BooleanField(default=False) # type: bool
bot_owner = models.ForeignKey('self', null=True, on_delete=models.SET_NULL) # type: Optional[UserProfile]
USERNAME_FIELD = 'email'
MAX_NAME_LENGTH = 100
# Our custom site-specific fields
full_name = models.CharField(max_length=MAX_NAME_LENGTH) # type: text_type
short_name = models.CharField(max_length=MAX_NAME_LENGTH) # type: text_type
# pointer points to Message.id, NOT UserMessage.id.
pointer = models.IntegerField() # type: int
last_pointer_updater = models.CharField(max_length=64) # type: text_type
realm = models.ForeignKey(Realm) # type: Realm
api_key = models.CharField(max_length=32) # type: text_type
tos_version = models.CharField(null=True, max_length=10) # type: text_type
### Notifications settings. ###
# Stream notifications.
enable_stream_desktop_notifications = models.BooleanField(default=False) # type: bool
enable_stream_sounds = models.BooleanField(default=False) # type: bool
# PM + @-mention notifications.
enable_desktop_notifications = models.BooleanField(default=True) # type: bool
enable_sounds = models.BooleanField(default=True) # type: bool
enable_offline_email_notifications = models.BooleanField(default=True) # type: bool
enable_offline_push_notifications = models.BooleanField(default=True) # type: bool
enable_online_push_notifications = models.BooleanField(default=False) # type: bool
enable_digest_emails = models.BooleanField(default=True) # type: bool
# Old notification field superseded by existence of stream notification
# settings.
default_desktop_notifications = models.BooleanField(default=True) # type: bool
###
last_reminder = models.DateTimeField(default=timezone.now, null=True) # type: Optional[datetime.datetime]
rate_limits = models.CharField(default=u"", max_length=100) # type: text_type # comma-separated list of range:max pairs
# Default streams
default_sending_stream = models.ForeignKey('zerver.Stream', null=True, related_name='+') # type: Optional[Stream]
default_events_register_stream = models.ForeignKey('zerver.Stream', null=True, related_name='+') # type: Optional[Stream]
default_all_public_streams = models.BooleanField(default=False) # type: bool
# UI vars
enter_sends = models.NullBooleanField(default=True) # type: Optional[bool]
autoscroll_forever = models.BooleanField(default=False) # type: bool
left_side_userlist = models.BooleanField(default=False) # type: bool
# display settings
twenty_four_hour_time = models.BooleanField(default=False) # type: bool
default_language = models.CharField(default=u'en', max_length=MAX_LANGUAGE_ID_LENGTH) # type: text_type
# Hours to wait before sending another email to a user
EMAIL_REMINDER_WAITPERIOD = 24
# Minutes to wait before warning a bot owner that her bot sent a message
# to a nonexistent stream
BOT_OWNER_STREAM_ALERT_WAITPERIOD = 1
AVATAR_FROM_GRAVATAR = u'G'
AVATAR_FROM_USER = u'U'
AVATAR_SOURCES = (
(AVATAR_FROM_GRAVATAR, 'Hosted by Gravatar'),
(AVATAR_FROM_USER, 'Uploaded by user'),
)
avatar_source = models.CharField(default=AVATAR_FROM_GRAVATAR, choices=AVATAR_SOURCES, max_length=1) # type: text_type
TUTORIAL_WAITING = u'W'
TUTORIAL_STARTED = u'S'
TUTORIAL_FINISHED = u'F'
TUTORIAL_STATES = ((TUTORIAL_WAITING, "Waiting"),
(TUTORIAL_STARTED, "Started"),
(TUTORIAL_FINISHED, "Finished"))
tutorial_status = models.CharField(default=TUTORIAL_WAITING, choices=TUTORIAL_STATES, max_length=1) # type: text_type
# Contains serialized JSON of the form:
# [("step 1", true), ("step 2", false)]
# where the second element of each tuple is if the step has been
# completed.
onboarding_steps = models.TextField(default=u'[]') # type: text_type
invites_granted = models.IntegerField(default=0) # type: int
invites_used = models.IntegerField(default=0) # type: int
alert_words = models.TextField(default=u'[]') # type: text_type # json-serialized list of strings
# Contains serialized JSON of the form:
# [["social", "mit"], ["devel", "ios"]]
muted_topics = models.TextField(default=u'[]') # type: text_type
objects = UserManager() # type: UserManager
def can_admin_user(self, target_user):
# type: (UserProfile) -> bool
"""Returns whether this user has permission to modify target_user"""
if target_user.bot_owner == self:
return True
elif self.is_realm_admin and self.realm == target_user.realm:
return True
else:
return False
def __unicode__(self):
# type: () -> text_type
return u"<UserProfile: %s %s>" % (self.email, self.realm)
@property
def is_incoming_webhook(self):
# type: () -> bool
return self.bot_type == UserProfile.INCOMING_WEBHOOK_BOT
@staticmethod
def emails_from_ids(user_ids):
# type: (Sequence[int]) -> Dict[int, text_type]
rows = UserProfile.objects.filter(id__in=user_ids).values('id', 'email')
return {row['id']: row['email'] for row in rows}
def can_create_streams(self):
# type: () -> bool
if self.is_realm_admin or not self.realm.create_stream_by_admins_only:
return True
else:
return False
def major_tos_version(self):
# type: () -> int
if self.tos_version is not None:
return int(self.tos_version.split('.')[0])
else:
return -1
def receives_offline_notifications(user_profile):
# type: (UserProfile) -> bool
return ((user_profile.enable_offline_email_notifications or
user_profile.enable_offline_push_notifications) and
not user_profile.is_bot)
def receives_online_notifications(user_profile):
# type: (UserProfile) -> bool
return (user_profile.enable_online_push_notifications and
not user_profile.is_bot)
# Make sure we flush the UserProfile object from our remote cache
# whenever we save it.
post_save.connect(flush_user_profile, sender=UserProfile)
class PreregistrationUser(models.Model):
email = models.EmailField() # type: text_type
referred_by = models.ForeignKey(UserProfile, null=True) # Optional[UserProfile]
streams = models.ManyToManyField('Stream') # type: Manager
invited_at = models.DateTimeField(auto_now=True) # type: datetime.datetime
realm_creation = models.BooleanField(default=False)
# status: whether an object has been confirmed.
# if confirmed, set to confirmation.settings.STATUS_ACTIVE
status = models.IntegerField(default=0) # type: int
realm = models.ForeignKey(Realm, null=True) # type: Optional[Realm]
class PushDeviceToken(models.Model):
APNS = 1
GCM = 2
KINDS = (
(APNS, 'apns'),
(GCM, 'gcm'),
)
kind = models.PositiveSmallIntegerField(choices=KINDS) # type: int
# The token is a unique device-specific token that is
# sent to us from each device:
# - APNS token if kind == APNS
# - GCM registration id if kind == GCM
token = models.CharField(max_length=4096, unique=True) # type: text_type
last_updated = models.DateTimeField(auto_now=True) # type: datetime.datetime
# The user who's device this is
user = models.ForeignKey(UserProfile, db_index=True) # type: UserProfile
# [optional] Contains the app id of the device if it is an iOS device
ios_app_id = models.TextField(null=True) # type: Optional[text_type]
def generate_email_token_for_stream():
# type: () -> text_type
return generate_random_token(32)
class Stream(ModelReprMixin, models.Model):
MAX_NAME_LENGTH = 60
name = models.CharField(max_length=MAX_NAME_LENGTH, db_index=True) # type: text_type
realm = models.ForeignKey(Realm, db_index=True) # type: Realm
invite_only = models.NullBooleanField(default=False) # type: Optional[bool]
# Used by the e-mail forwarder. The e-mail RFC specifies a maximum
# e-mail length of 254, and our max stream length is 30, so we
# have plenty of room for the token.
email_token = models.CharField(
max_length=32, default=generate_email_token_for_stream) # type: text_type
description = models.CharField(max_length=1024, default=u'') # type: text_type
date_created = models.DateTimeField(default=timezone.now) # type: datetime.datetime
deactivated = models.BooleanField(default=False) # type: bool
def __unicode__(self):
# type: () -> text_type
return u"<Stream: %s>" % (self.name,)
def is_public(self):
# type: () -> bool
# All streams are private in Zephyr mirroring realms.
return not self.invite_only and not self.realm.is_zephyr_mirror_realm
class Meta(object):
unique_together = ("name", "realm")
def num_subscribers(self):
# type: () -> int
return Subscription.objects.filter(
recipient__type=Recipient.STREAM,
recipient__type_id=self.id,
user_profile__is_active=True,
active=True
).count()
# This is stream information that is sent to clients
def to_dict(self):
# type: () -> Dict[str, Any]
return dict(name=self.name,
stream_id=self.id,
description=self.description,
invite_only=self.invite_only)
post_save.connect(flush_stream, sender=Stream)
post_delete.connect(flush_stream, sender=Stream)
def valid_stream_name(name):
# type: (text_type) -> bool
return name != ""
# The Recipient table is used to map Messages to the set of users who
# received the message. It is implemented as a set of triples (id,
# type_id, type). We have 3 types of recipients: Huddles (for group
# private messages), UserProfiles (for 1:1 private messages), and
# Streams. The recipient table maps a globally unique recipient id
# (used by the Message table) to the type-specific unique id (the
# stream id, user_profile id, or huddle id).
class Recipient(ModelReprMixin, models.Model):
type_id = models.IntegerField(db_index=True) # type: int
type = models.PositiveSmallIntegerField(db_index=True) # type: int
# Valid types are {personal, stream, huddle}
PERSONAL = 1
STREAM = 2
HUDDLE = 3
class Meta(object):
unique_together = ("type", "type_id")
# N.B. If we used Django's choice=... we would get this for free (kinda)
_type_names = {
PERSONAL: 'personal',
STREAM: 'stream',
HUDDLE: 'huddle' }
def type_name(self):
# type: () -> str
# Raises KeyError if invalid
return self._type_names[self.type]
def __unicode__(self):
# type: () -> text_type
display_recipient = get_display_recipient(self)
return u"<Recipient: %s (%d, %s)>" % (display_recipient, self.type_id, self.type)
class Client(ModelReprMixin, models.Model):
name = models.CharField(max_length=30, db_index=True, unique=True) # type: text_type
def __unicode__(self):
# type: () -> text_type
return u"<Client: %s>" % (self.name,)
get_client_cache = {} # type: Dict[text_type, Client]
def get_client(name):
# type: (text_type) -> Client
if name not in get_client_cache:
result = get_client_remote_cache(name)
get_client_cache[name] = result
return get_client_cache[name]
def get_client_cache_key(name):
# type: (text_type) -> text_type
return u'get_client:%s' % (make_safe_digest(name),)
@cache_with_key(get_client_cache_key, timeout=3600*24*7)
def get_client_remote_cache(name):
# type: (text_type) -> Client
(client, _) = Client.objects.get_or_create(name=name)
return client
# get_stream_backend takes either a realm id or a realm
@cache_with_key(get_stream_cache_key, timeout=3600*24*7)
def get_stream_backend(stream_name, realm):
# type: (text_type, Realm) -> Stream
return Stream.objects.select_related("realm").get(
name__iexact=stream_name.strip(), realm_id=realm.id)
def get_active_streams(realm):
# type: (Realm) -> QuerySet
"""
Return all streams (including invite-only streams) that have not been deactivated.
"""
return Stream.objects.filter(realm=realm, deactivated=False)
def get_stream(stream_name, realm):
# type: (text_type, Realm) -> Optional[Stream]
try:
return get_stream_backend(stream_name, realm)
except Stream.DoesNotExist:
return None
def bulk_get_streams(realm, stream_names):
# type: (Realm, STREAM_NAMES) -> Dict[text_type, Any]
def fetch_streams_by_name(stream_names):
# type: (List[text_type]) -> Sequence[Stream]
#
# This should be just
#
# Stream.objects.select_related("realm").filter(name__iexact__in=stream_names,
# realm_id=realm_id)
#
# But chaining __in and __iexact doesn't work with Django's
# ORM, so we have the following hack to construct the relevant where clause
if len(stream_names) == 0:
return []
upper_list = ", ".join(["UPPER(%s)"] * len(stream_names))
where_clause = "UPPER(zerver_stream.name::text) IN (%s)" % (upper_list,)
return get_active_streams(realm.id).select_related("realm").extra(
where=[where_clause],
params=stream_names)
return generic_bulk_cached_fetch(lambda stream_name: get_stream_cache_key(stream_name, realm),
fetch_streams_by_name,
[stream_name.lower() for stream_name in stream_names],
id_fetcher=lambda stream: stream.name.lower())
def get_recipient_cache_key(type, type_id):
# type: (int, int) -> text_type
return u"get_recipient:%s:%s" % (type, type_id,)
@cache_with_key(get_recipient_cache_key, timeout=3600*24*7)
def get_recipient(type, type_id):
# type: (int, int) -> Recipient
return Recipient.objects.get(type_id=type_id, type=type)
def bulk_get_recipients(type, type_ids):
# type: (int, List[int]) -> Dict[int, Any]
def cache_key_function(type_id):
# type: (int) -> text_type
return get_recipient_cache_key(type, type_id)
def query_function(type_ids):
# type: (List[int]) -> Sequence[Recipient]
# TODO: Change return type to QuerySet[Recipient]
return Recipient.objects.filter(type=type, type_id__in=type_ids)
return generic_bulk_cached_fetch(cache_key_function, query_function, type_ids,
id_fetcher=lambda recipient: recipient.type_id)
class Message(ModelReprMixin, models.Model):
sender = models.ForeignKey(UserProfile) # type: UserProfile
recipient = models.ForeignKey(Recipient) # type: Recipient
subject = models.CharField(max_length=MAX_SUBJECT_LENGTH, db_index=True) # type: text_type
content = models.TextField() # type: text_type
rendered_content = models.TextField(null=True) # type: Optional[text_type]
rendered_content_version = models.IntegerField(null=True) # type: Optional[int]
pub_date = models.DateTimeField('date published', db_index=True) # type: datetime.datetime
sending_client = models.ForeignKey(Client) # type: Client
last_edit_time = models.DateTimeField(null=True) # type: Optional[datetime.datetime]
edit_history = models.TextField(null=True) # type: Optional[text_type]
has_attachment = models.BooleanField(default=False, db_index=True) # type: bool
has_image = models.BooleanField(default=False, db_index=True) # type: bool
has_link = models.BooleanField(default=False, db_index=True) # type: bool
def topic_name(self):
# type: () -> text_type
"""
Please start using this helper to facilitate an
eventual switch over to a separate topic table.
"""
return self.subject
def __unicode__(self):
# type: () -> text_type
display_recipient = get_display_recipient(self.recipient)
return u"<Message: %s / %s / %r>" % (display_recipient, self.subject, self.sender)
def get_realm(self):
# type: () -> Realm
return self.sender.realm
def save_rendered_content(self):
# type: () -> None
self.save(update_fields=["rendered_content", "rendered_content_version"])
@staticmethod
def need_to_render_content(rendered_content, rendered_content_version, bugdown_version):
# type: (Optional[text_type], int, int) -> bool
return rendered_content is None or rendered_content_version < bugdown_version
def to_log_dict(self):
# type: () -> Dict[str, Any]
return dict(
id = self.id,
sender_id = self.sender.id,
sender_email = self.sender.email,
sender_domain = self.sender.realm.domain,
sender_full_name = self.sender.full_name,
sender_short_name = self.sender.short_name,
sending_client = self.sending_client.name,
type = self.recipient.type_name(),
recipient = get_display_recipient(self.recipient),
subject = self.topic_name(),
content = self.content,
timestamp = datetime_to_timestamp(self.pub_date))
@staticmethod
def get_raw_db_rows(needed_ids):
# type: (List[int]) -> List[Dict[str, Any]]
# This is a special purpose function optimized for
# callers like get_old_messages_backend().
fields = [
'id',
'subject',
'pub_date',
'last_edit_time',
'edit_history',
'content',
'rendered_content',
'rendered_content_version',
'recipient_id',
'recipient__type',
'recipient__type_id',
'sender_id',
'sending_client__name',
'sender__email',
'sender__full_name',
'sender__short_name',
'sender__realm__id',
'sender__realm__domain',
'sender__avatar_source',
'sender__is_mirror_dummy',
]
return Message.objects.filter(id__in=needed_ids).values(*fields)
def sent_by_human(self):
# type: () -> bool
sending_client = self.sending_client.name.lower()
return (sending_client in ('zulipandroid', 'zulipios', 'zulipdesktop',
'website', 'ios', 'android')) or \
('desktop app' in sending_client)
@staticmethod
def content_has_attachment(content):
# type: (text_type) -> Match
return re.search(r'[/\-]user[\-_]uploads[/\.-]', content)
@staticmethod
def content_has_image(content):
# type: (text_type) -> bool
return bool(re.search(r'[/\-]user[\-_]uploads[/\.-]\S+\.(bmp|gif|jpg|jpeg|png|webp)', content, re.IGNORECASE))
@staticmethod
def content_has_link(content):
# type: (text_type) -> bool
return 'http://' in content or 'https://' in content or '/user_uploads' in content
@staticmethod
def is_status_message(content, rendered_content):
# type: (text_type, text_type) -> bool
"""
Returns True if content and rendered_content are from 'me_message'
"""
if content.startswith('/me ') and '\n' not in content:
if rendered_content.startswith('<p>') and rendered_content.endswith('</p>'):
return True
return False
def update_calculated_fields(self):
# type: () -> None
# TODO: rendered_content could also be considered a calculated field
content = self.content
self.has_attachment = bool(Message.content_has_attachment(content))
self.has_image = bool(Message.content_has_image(content))
self.has_link = bool(Message.content_has_link(content))
@receiver(pre_save, sender=Message)
def pre_save_message(sender, **kwargs):
# type: (Any, **Any) -> None
if kwargs['update_fields'] is None or "content" in kwargs['update_fields']:
message = kwargs['instance']
message.update_calculated_fields()
def get_context_for_message(message):
# type: (Message) -> Sequence[Message]
# TODO: Change return type to QuerySet[Message]
return Message.objects.filter(
recipient_id=message.recipient_id,
subject=message.subject,
id__lt=message.id,
pub_date__gt=message.pub_date - timedelta(minutes=15),
).order_by('-id')[:10]
post_save.connect(flush_message, sender=Message)
# Whenever a message is sent, for each user current subscribed to the
# corresponding Recipient object, we add a row to the UserMessage
# table, which has has columns (id, user profile id, message id,
# flags) indicating which messages each user has received. This table
# allows us to quickly query any user's last 1000 messages to generate
# the home view.
#
# Additionally, the flags field stores metadata like whether the user
# has read the message, starred the message, collapsed or was
# mentioned the message, etc.
#
# UserMessage is the largest table in a Zulip installation, even
# though each row is only 4 integers.
class UserMessage(ModelReprMixin, models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
message = models.ForeignKey(Message) # type: Message
# We're not using the archived field for now, but create it anyway
# since this table will be an unpleasant one to do schema changes
# on later
ALL_FLAGS = ['read', 'starred', 'collapsed', 'mentioned', 'wildcard_mentioned',
'summarize_in_home', 'summarize_in_stream', 'force_expand', 'force_collapse',
'has_alert_word', "historical", 'is_me_message']
flags = BitField(flags=ALL_FLAGS, default=0) # type: BitHandler
class Meta(object):
unique_together = ("user_profile", "message")
def __unicode__(self):
# type: () -> text_type
display_recipient = get_display_recipient(self.message.recipient)
return u"<UserMessage: %s / %s (%s)>" % (display_recipient, self.user_profile.email, self.flags_list())
def flags_list(self):
# type: () -> List[str]
return [flag for flag in self.flags.keys() if getattr(self.flags, flag).is_set]
def parse_usermessage_flags(val):
# type: (int) -> List[str]
flags = []
mask = 1
for flag in UserMessage.ALL_FLAGS:
if val & mask:
flags.append(flag)
mask <<= 1
return flags
class Attachment(ModelReprMixin, models.Model):
MAX_FILENAME_LENGTH = 100
file_name = models.CharField(max_length=MAX_FILENAME_LENGTH, db_index=True) # type: text_type
# path_id is a storage location agnostic representation of the path of the file.
# If the path of a file is http://localhost:9991/user_uploads/a/b/abc/temp_file.py
# then its path_id will be a/b/abc/temp_file.py.
path_id = models.TextField(db_index=True) # type: text_type
owner = models.ForeignKey(UserProfile) # type: UserProfile
realm = models.ForeignKey(Realm, blank=True, null=True) # type: Realm
is_realm_public = models.BooleanField(default=False) # type: bool
messages = models.ManyToManyField(Message) # type: Manager
create_time = models.DateTimeField(default=timezone.now, db_index=True) # type: datetime.datetime
def __unicode__(self):
# type: () -> text_type
return u"<Attachment: %s>" % (self.file_name,)
def is_claimed(self):
# type: () -> bool
return self.messages.count() > 0
def get_old_unclaimed_attachments(weeks_ago):
# type: (int) -> Sequence[Attachment]
# TODO: Change return type to QuerySet[Attachment]
delta_weeks_ago = timezone.now() - datetime.timedelta(weeks=weeks_ago)
old_attachments = Attachment.objects.filter(messages=None, create_time__lt=delta_weeks_ago)
return old_attachments
class Subscription(ModelReprMixin, models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
recipient = models.ForeignKey(Recipient) # type: Recipient
active = models.BooleanField(default=True) # type: bool
in_home_view = models.NullBooleanField(default=True) # type: Optional[bool]
DEFAULT_STREAM_COLOR = u"#c2c2c2"
color = models.CharField(max_length=10, default=DEFAULT_STREAM_COLOR) # type: text_type
pin_to_top = models.BooleanField(default=False) # type: bool
desktop_notifications = models.BooleanField(default=True) # type: bool
audible_notifications = models.BooleanField(default=True) # type: bool
# Combination desktop + audible notifications superseded by the
# above.
notifications = models.BooleanField(default=False) # type: bool
class Meta(object):
unique_together = ("user_profile", "recipient")
def __unicode__(self):
# type: () -> text_type
return u"<Subscription: %r -> %s>" % (self.user_profile, self.recipient)
@cache_with_key(user_profile_by_id_cache_key, timeout=3600*24*7)
def get_user_profile_by_id(uid):
# type: (int) -> UserProfile
return UserProfile.objects.select_related().get(id=uid)
@cache_with_key(user_profile_by_email_cache_key, timeout=3600*24*7)
def get_user_profile_by_email(email):
# type: (text_type) -> UserProfile
return UserProfile.objects.select_related().get(email__iexact=email.strip())
@cache_with_key(active_user_dicts_in_realm_cache_key, timeout=3600*24*7)
def get_active_user_dicts_in_realm(realm):
# type: (Realm) -> List[Dict[str, Any]]
return UserProfile.objects.filter(realm=realm, is_active=True) \
.values(*active_user_dict_fields)
@cache_with_key(active_bot_dicts_in_realm_cache_key, timeout=3600*24*7)
def get_active_bot_dicts_in_realm(realm):
# type: (Realm) -> List[Dict[str, Any]]
return UserProfile.objects.filter(realm=realm, is_active=True, is_bot=True) \
.values(*active_bot_dict_fields)
def get_owned_bot_dicts(user_profile, include_all_realm_bots_if_admin=True):
# type: (UserProfile, bool) -> List[Dict[str, Any]]
if user_profile.is_realm_admin and include_all_realm_bots_if_admin:
result = get_active_bot_dicts_in_realm(user_profile.realm)
else:
result = UserProfile.objects.filter(realm=user_profile.realm, is_active=True, is_bot=True,
bot_owner=user_profile).values(*active_bot_dict_fields)
# TODO: Remove this import cycle
from zerver.lib.avatar import get_avatar_url
return [{'email': botdict['email'],
'full_name': botdict['full_name'],
'api_key': botdict['api_key'],
'default_sending_stream': botdict['default_sending_stream__name'],
'default_events_register_stream': botdict['default_events_register_stream__name'],
'default_all_public_streams': botdict['default_all_public_streams'],
'owner': botdict['bot_owner__email'],
'avatar_url': get_avatar_url(botdict['avatar_source'], botdict['email']),
}
for botdict in result]
def get_prereg_user_by_email(email):
# type: (text_type) -> PreregistrationUser
# A user can be invited many times, so only return the result of the latest
# invite.
return PreregistrationUser.objects.filter(email__iexact=email.strip()).latest("invited_at")
def get_cross_realm_users():
# type: () -> Set[text_type]
return set(settings.CROSS_REALM_BOT_EMAILS)
# The Huddle class represents a group of individuals who have had a
# Group Private Message conversation together. The actual membership
# of the Huddle is stored in the Subscription table just like with
# Streams, and a hash of that list is stored in the huddle_hash field
# below, to support efficiently mapping from a set of users to the
# corresponding Huddle object.
class Huddle(models.Model):
# TODO: We should consider whether using
# CommaSeparatedIntegerField would be better.
huddle_hash = models.CharField(max_length=40, db_index=True, unique=True) # type: text_type
def get_huddle_hash(id_list):
# type: (List[int]) -> text_type
id_list = sorted(set(id_list))
hash_key = ",".join(str(x) for x in id_list)
return make_safe_digest(hash_key)
def huddle_hash_cache_key(huddle_hash):
# type: (text_type) -> text_type
return u"huddle_by_hash:%s" % (huddle_hash,)
def get_huddle(id_list):
# type: (List[int]) -> Huddle
huddle_hash = get_huddle_hash(id_list)
return get_huddle_backend(huddle_hash, id_list)
@cache_with_key(lambda huddle_hash, id_list: huddle_hash_cache_key(huddle_hash), timeout=3600*24*7)
def get_huddle_backend(huddle_hash, id_list):
# type: (text_type, List[int]) -> Huddle
(huddle, created) = Huddle.objects.get_or_create(huddle_hash=huddle_hash)
if created:
with transaction.atomic():
recipient = Recipient.objects.create(type_id=huddle.id,
type=Recipient.HUDDLE)
subs_to_create = [Subscription(recipient=recipient,
user_profile=get_user_profile_by_id(user_profile_id))
for user_profile_id in id_list]
Subscription.objects.bulk_create(subs_to_create)
return huddle
def get_realm(domain):
# type: (text_type) -> Optional[Realm]
if not domain:
return None
try:
return Realm.objects.get(domain__iexact=domain.strip())
except Realm.DoesNotExist:
return None
def clear_database():
# type: () -> None
pylibmc.Client(['127.0.0.1']).flush_all()
model = None # type: Any
for model in [Message, Stream, UserProfile, Recipient,
Realm, Subscription, Huddle, UserMessage, Client,
DefaultStream]:
model.objects.all().delete()
Session.objects.all().delete()
class UserActivity(models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
client = models.ForeignKey(Client) # type: Client
query = models.CharField(max_length=50, db_index=True) # type: text_type
count = models.IntegerField() # type: int
last_visit = models.DateTimeField('last visit') # type: datetime.datetime
class Meta(object):
unique_together = ("user_profile", "client", "query")
class UserActivityInterval(models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
start = models.DateTimeField('start time', db_index=True) # type: datetime.datetime
end = models.DateTimeField('end time', db_index=True) # type: datetime.datetime
class UserPresence(models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
client = models.ForeignKey(Client) # type: Client
# Valid statuses
ACTIVE = 1
IDLE = 2
timestamp = models.DateTimeField('presence changed') # type: datetime.datetime
status = models.PositiveSmallIntegerField(default=ACTIVE) # type: int
@staticmethod
def status_to_string(status):
# type: (int) -> str
if status == UserPresence.ACTIVE:
return 'active'
elif status == UserPresence.IDLE:
return 'idle'
@staticmethod
def get_status_dict_by_realm(realm_id):
# type: (int) -> defaultdict[Any, Dict[Any, Any]]
user_statuses = defaultdict(dict) # type: defaultdict[Any, Dict[Any, Any]]
query = UserPresence.objects.filter(
user_profile__realm_id=realm_id,
user_profile__is_active=True,
user_profile__is_bot=False
).values(
'client__name',
'status',
'timestamp',
'user_profile__email',
'user_profile__id',
'user_profile__enable_offline_push_notifications',
'user_profile__is_mirror_dummy',
)
mobile_user_ids = [row['user'] for row in PushDeviceToken.objects.filter(
user__realm_id=1,
user__is_active=True,
user__is_bot=False,
).distinct("user").values("user")]
for row in query:
info = UserPresence.to_presence_dict(
client_name=row['client__name'],
status=row['status'],
dt=row['timestamp'],
push_enabled=row['user_profile__enable_offline_push_notifications'],
has_push_devices=row['user_profile__id'] in mobile_user_ids,
is_mirror_dummy=row['user_profile__is_mirror_dummy'],
)
user_statuses[row['user_profile__email']][row['client__name']] = info
return user_statuses
@staticmethod
def to_presence_dict(client_name=None, status=None, dt=None, push_enabled=None,
has_push_devices=None, is_mirror_dummy=None):
# type: (Optional[text_type], Optional[int], Optional[datetime.datetime], Optional[bool], Optional[bool], Optional[bool]) -> Dict[str, Any]
presence_val = UserPresence.status_to_string(status)
timestamp = datetime_to_timestamp(dt)
return dict(
client=client_name,
status=presence_val,
timestamp=timestamp,
pushable=(push_enabled and has_push_devices),
)
def to_dict(self):
# type: () -> Dict[str, Any]
return UserPresence.to_presence_dict(
client_name=self.client.name,
status=self.status,
dt=self.timestamp
)
@staticmethod
def status_from_string(status):
# type: (NonBinaryStr) -> Optional[int]
if status == 'active':
status_val = UserPresence.ACTIVE
elif status == 'idle':
status_val = UserPresence.IDLE
else:
status_val = None
return status_val
class Meta(object):
unique_together = ("user_profile", "client")
class DefaultStream(models.Model):
realm = models.ForeignKey(Realm) # type: Realm
stream = models.ForeignKey(Stream) # type: Stream
class Meta(object):
unique_together = ("realm", "stream")
class Referral(models.Model):
user_profile = models.ForeignKey(UserProfile) # type: UserProfile
email = models.EmailField(blank=False, null=False) # type: text_type
timestamp = models.DateTimeField(auto_now_add=True, null=False) # type: datetime.datetime
# This table only gets used on Zulip Voyager instances
# For reasons of deliverability (and sending from multiple email addresses),
# we will still send from mandrill when we send things from the (staging.)zulip.com install
class ScheduledJob(models.Model):
scheduled_timestamp = models.DateTimeField(auto_now_add=False, null=False) # type: datetime.datetime
type = models.PositiveSmallIntegerField() # type: int
# Valid types are {email}
# for EMAIL, filter_string is recipient_email
EMAIL = 1
# JSON representation of the job's data. Be careful, as we are not relying on Django to do validation
data = models.TextField() # type: text_type
# Kind if like a ForeignKey, but table is determined by type.
filter_id = models.IntegerField(null=True) # type: Optional[int]
filter_string = models.CharField(max_length=100) # type: text_type
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