zulip/zproject/settings.py

# Django settings for zulip project.
########################################################################
# Here's how settings for the Zulip project work:
#
# * settings.py contains non-site-specific and settings configuration
# for the Zulip Django app.
# * settings.py imports prod_settings.py, and any site-specific configuration
# belongs there.  The template for prod_settings.py is prod_settings_template.py
#
# See https://zulip.readthedocs.io/en/latest/subsystems/settings.html for more information
#
########################################################################
from copy import deepcopy
import os
import time
import sys
from typing import Any, Optional
import configparser

from zerver.lib.db import TimeTrackingConnection
import zerver.lib.logging_util

########################################################################
# INITIAL SETTINGS
########################################################################

DEPLOY_ROOT = os.path.realpath(os.path.dirname(os.path.dirname(__file__)))

config_file = configparser.RawConfigParser()
config_file.read("/etc/zulip/zulip.conf")

# Whether this instance of Zulip is running in a production environment.
PRODUCTION = config_file.has_option('machine', 'deploy_type')
DEVELOPMENT = not PRODUCTION

secrets_file = configparser.RawConfigParser()
if PRODUCTION:
    secrets_file.read("/etc/zulip/zulip-secrets.conf")
else:
    secrets_file.read(os.path.join(DEPLOY_ROOT, "zproject/dev-secrets.conf"))

def get_secret(key: str, default_value: Optional[Any]=None,
               development_only: bool=False) -> Optional[Any]:
    if development_only and PRODUCTION:
        return default_value
    if secrets_file.has_option('secrets', key):
        return secrets_file.get('secrets', key)
    return default_value

def get_config(section: str, key: str, default_value: Optional[Any]=None) -> Optional[Any]:
    if config_file.has_option(section, key):
        return config_file.get(section, key)
    return default_value

# Make this unique, and don't share it with anybody.
SECRET_KEY = get_secret("secret_key")

# A shared secret, used to authenticate different parts of the app to each other.
SHARED_SECRET = get_secret("shared_secret")

# We use this salt to hash a user's email into a filename for their user-uploaded
# avatar.  If this salt is discovered, attackers will only be able to determine
# that the owner of an email account has uploaded an avatar to Zulip, which isn't
# the end of the world.  Don't use the salt where there is more security exposure.
AVATAR_SALT = get_secret("avatar_salt")

# SERVER_GENERATION is used to track whether the server has been
# restarted for triggering browser clients to reload.
SERVER_GENERATION = int(time.time())

# Key to authenticate this server to zulip.org for push notifications, etc.
ZULIP_ORG_KEY = get_secret("zulip_org_key")
ZULIP_ORG_ID = get_secret("zulip_org_id")

if 'DEBUG' not in globals():
    # Uncomment end of next line to test CSS minification.
    # For webpack JS minification use tools/run_dev.py --minify
    DEBUG = DEVELOPMENT  # and platform.node() != 'your-machine'

if DEBUG:
    INTERNAL_IPS = ('127.0.0.1',)

# Detect whether we're running as a queue worker; this impacts the logging configuration.
if len(sys.argv) > 2 and sys.argv[0].endswith('manage.py') and sys.argv[1] == 'process_queue':
    IS_WORKER = True
else:
    IS_WORKER = False


# This is overridden in test_settings.py for the test suites
TEST_SUITE = False
# The new user tutorial is enabled by default, but disabled for client tests.
TUTORIAL_ENABLED = True
# This is overridden in test_settings.py for the test suites
CASPER_TESTS = False

# Google Compute Engine has an /etc/boto.cfg that is "nicely
# configured" to work with GCE's storage service.  However, their
# configuration is super aggressive broken, in that it means importing
# boto in a virtualenv that doesn't contain the GCE tools crashes.
#
# By using our own path for BOTO_CONFIG, we can cause boto to not
# process /etc/boto.cfg.
os.environ['BOTO_CONFIG'] = '/etc/zulip/boto.cfg'

# Import variables like secrets from the prod_settings file
# Import prod_settings after determining the deployment/machine type
if PRODUCTION:
    from .prod_settings import *
else:
    from .dev_settings import *

########################################################################
# DEFAULT VALUES FOR SETTINGS
########################################################################

# For any settings that are not set in the site-specific configuration file
# (/etc/zulip/settings.py in production, or dev_settings.py or test_settings.py
# in dev and test), we want to initialize them to sane defaults.

# These settings are intended for the server admin to set.  We document them in
# prod_settings_template.py, and in the initial /etc/zulip/settings.py on a new
# install of the Zulip server.
DEFAULT_SETTINGS = {
    # Extra HTTP "Host" values to allow (standard ones added below)
    'ALLOWED_HOSTS': [],

    # Basic email settings
    'NOREPLY_EMAIL_ADDRESS': "noreply@" + EXTERNAL_HOST.split(":")[0],
    'ADD_TOKENS_TO_NOREPLY_ADDRESS': True,
    'TOKENIZED_NOREPLY_EMAIL_ADDRESS': "noreply-{token}@" + EXTERNAL_HOST.split(":")[0],
    'PHYSICAL_ADDRESS': '',

    # SMTP settings
    'EMAIL_HOST': None,
    # Other settings, like EMAIL_HOST_USER, EMAIL_PORT, and EMAIL_USE_TLS,
    # we leave up to Django's defaults.

    # Google auth
    'GOOGLE_OAUTH2_CLIENT_ID': None,

    # LDAP auth
    'AUTH_LDAP_SERVER_URI': "",
    'LDAP_EMAIL_ATTR': None,
    # AUTH_LDAP_CONNECTION_OPTIONS: we set ldap.OPT_REFERRALS below if unset.
    'AUTH_LDAP_CONNECTION_OPTIONS': {},
    # Disable django-auth-ldap caching, to prevent problems with OU changes.
    'AUTH_LDAP_CACHE_TIMEOUT': 0,
    # Development-only settings for fake LDAP authentication; used to
    # support local development of LDAP auth without an LDAP server.
    # Detailed docs in zproject/dev_settings.py.
    'FAKE_LDAP_MODE': None,
    'FAKE_LDAP_NUM_USERS': 8,

    # Social auth; we support providing values for some of these
    # settings in zulip-secrets.conf instead of settings.py in development.
    'SOCIAL_AUTH_GITHUB_KEY': get_secret('social_auth_github_key', development_only=True),
    'SOCIAL_AUTH_GITHUB_ORG_NAME': None,
    'SOCIAL_AUTH_GITHUB_TEAM_ID': None,
    'SOCIAL_AUTH_SUBDOMAIN': None,
    'SOCIAL_AUTH_AZUREAD_OAUTH2_SECRET': get_secret('azure_oauth2_secret'),

    # Other auth
    'SSO_APPEND_DOMAIN': None,

    # Email gateway
    'EMAIL_GATEWAY_PATTERN': '',
    'EMAIL_GATEWAY_LOGIN': None,
    'EMAIL_GATEWAY_IMAP_SERVER': None,
    'EMAIL_GATEWAY_IMAP_PORT': None,
    'EMAIL_GATEWAY_IMAP_FOLDER': None,
    # Not documented for in /etc/zulip/settings.py, since it's rarely needed.
    'EMAIL_GATEWAY_EXTRA_PATTERN_HACK': None,

    # Error reporting
    'ERROR_REPORTING': True,
    'BROWSER_ERROR_REPORTING': False,
    'LOGGING_SHOW_MODULE': False,
    'LOGGING_SHOW_PID': False,
    'SLOW_QUERY_LOGS_STREAM': None,

    # File uploads and avatars
    'DEFAULT_AVATAR_URI': '/static/images/default-avatar.png',
    'DEFAULT_LOGO_URI': '/static/images/logo/zulip-org-logo.png',
    'S3_AVATAR_BUCKET': '',
    'S3_AUTH_UPLOADS_BUCKET': '',
    'S3_REGION': '',
    'LOCAL_UPLOADS_DIR': None,
    'MAX_FILE_UPLOAD_SIZE': 25,

    # JITSI video call integration; set to None to disable integration.
    'JITSI_SERVER_URL': 'https://meet.jit.si/',

    # Feedback bot settings
    'ENABLE_FEEDBACK': PRODUCTION,
    'FEEDBACK_EMAIL': None,

    # Max state storage per user
    # TODO: Add this to zproject/prod_settings_template.py once stateful bots are fully functional.
    'USER_STATE_SIZE_LIMIT': 10000000,
    # Max size of a single configuration entry of an embedded bot.
    'BOT_CONFIG_SIZE_LIMIT': 10000,

    # External service configuration
    'CAMO_URI': '',
    'MEMCACHED_LOCATION': '127.0.0.1:11211',
    'RABBITMQ_HOST': '127.0.0.1',
    'RABBITMQ_USERNAME': 'zulip',
    'REDIS_HOST': '127.0.0.1',
    'REDIS_PORT': 6379,
    'REMOTE_POSTGRES_HOST': '',
    'REMOTE_POSTGRES_SSLMODE': '',
    'THUMBOR_URL': '',
    'THUMBOR_SERVES_CAMO': False,
    'THUMBNAIL_IMAGES': False,
    'SENDFILE_BACKEND': None,

    # ToS/Privacy templates
    'PRIVACY_POLICY': None,
    'TERMS_OF_SERVICE': None,

    # Security
    'ENABLE_FILE_LINKS': False,
    'ENABLE_GRAVATAR': True,
    'INLINE_IMAGE_PREVIEW': True,
    'INLINE_URL_EMBED_PREVIEW': False,
    'NAME_CHANGES_DISABLED': False,
    'PASSWORD_MIN_LENGTH': 6,
    'PASSWORD_MIN_GUESSES': 10000,
    'PUSH_NOTIFICATION_BOUNCER_URL': None,
    'PUSH_NOTIFICATION_REDACT_CONTENT': False,
    'SUBMIT_USAGE_STATISTICS': True,
    'RATE_LIMITING': True,
    'SEND_LOGIN_EMAILS': True,
    'EMBEDDED_BOTS_ENABLED': False,

    # Two Factor Authentication is not yet implementation-complete
    'TWO_FACTOR_AUTHENTICATION_ENABLED': False,

    # This is used to send all hotspots for convenient manual testing
    # in development mode.
    'ALWAYS_SEND_ALL_HOTSPOTS': False,

    # In-development search pills feature.
    'SEARCH_PILLS_ENABLED': False,

    # We log emails in development environment for accessing
    # them easily through /emails page
    'DEVELOPMENT_LOG_EMAILS': DEVELOPMENT,
}

# These settings are not documented in prod_settings_template.py.
# They should either be documented here, or documented there.
#
# Settings that it makes sense to document here instead of in
# prod_settings_template.py are those that
#  * don't make sense to change in production, but rather are intended
#    for dev and test environments; or
#  * don't make sense to change on a typical production server with
#    one or a handful of realms, though they might on an installation
#    like zulipchat.com or to work around a problem on another server.
DEFAULT_SETTINGS.update({

    # The following bots are optional system bots not enabled by
    # default.  The default ones are defined in INTERNAL_BOTS, below.

    # ERROR_BOT sends Django exceptions to an "errors" stream in the
    # system realm.
    'ERROR_BOT': None,
    # These are extra bot users for our end-to-end Nagios message
    # sending tests.
    'NAGIOS_STAGING_SEND_BOT': None,
    'NAGIOS_STAGING_RECEIVE_BOT': None,
    # Feedback bot, messages sent to it are by default emailed to
    # FEEDBACK_EMAIL (see above), but can be sent to a stream,
    # depending on configuration.
    'FEEDBACK_BOT': 'feedback@zulip.com',
    'FEEDBACK_BOT_NAME': 'Zulip Feedback Bot',
    'FEEDBACK_STREAM': None,
    # SYSTEM_BOT_REALM would be a constant always set to 'zulip',
    # except that it isn't that on zulipchat.com.  We will likely do a
    # migration and eliminate this parameter in the future.
    'SYSTEM_BOT_REALM': 'zulip',

    # Structurally, we will probably eventually merge
    # analytics into part of the main server, rather
    # than a separate app.
    'EXTRA_INSTALLED_APPS': ['analytics'],

    # Default GOOGLE_CLIENT_ID to the value needed for Android auth to work
    'GOOGLE_CLIENT_ID': '835904834568-77mtr5mtmpgspj9b051del9i9r5t4g4n.apps.googleusercontent.com',

    # Legacy event logs configuration.  Our plans include removing
    # log_event entirely in favor of RealmAuditLog, at which point we
    # can remove this setting.
    'EVENT_LOGS_ENABLED': False,

    # Used to construct URLs to point to the Zulip server.  Since we
    # only support HTTPS in production, this is just for development.
    'EXTERNAL_URI_SCHEME': "https://",

    # Whether anyone can create a new organization on the Zulip server.
    'OPEN_REALM_CREATION': False,

    # Setting for where the system bot users are.  Likely has no
    # purpose now that the REALMS_HAVE_SUBDOMAINS migration is finished.
    'SYSTEM_ONLY_REALMS': {"zulip"},

    # Alternate hostnames to serve particular realms on, in addition to
    # their usual subdomains.  Keys are realm string_ids (aka subdomains),
    # and values are alternate hosts.
    # The values will also be added to ALLOWED_HOSTS.
    'REALM_HOSTS': {},

    # Whether the server is using the Pgroonga full-text search
    # backend.  Plan is to turn this on for everyone after further
    # testing.
    'USING_PGROONGA': False,

    # How Django should send emails.  Set for most contexts below, but
    # available for sysadmin override in unusual cases.
    'EMAIL_BACKEND': None,

    # Whether to give admins a warning in the web app that email isn't set up.
    # Set below when email isn't configured.
    'WARN_NO_EMAIL': False,

    # Whether to keep extra frontend stack trace data.
    # TODO: Investigate whether this should be removed and set one way or other.
    'SAVE_FRONTEND_STACKTRACES': False,

    # If True, disable rate-limiting and other filters on sending error messages
    # to admins, and enable logging on the error-reporting itself.  Useful
    # mainly in development.
    'DEBUG_ERROR_REPORTING': False,

    # Whether to flush memcached after data migrations.  Because of
    # how we do deployments in a way that avoids reusing memcached,
    # this is disabled in production, but we need it in development.
    'POST_MIGRATION_CACHE_FLUSHING': False,

    # Settings for APNS.  Only needed on push.zulipchat.com.
    'APNS_CERT_FILE': None,
    'APNS_SANDBOX': True,

    # Max number of "remove notification" FCM/GCM messages to send separately
    # in one burst; the rest are batched.  Older clients ignore the batched
    # portion, so only receive this many removals.  Lower values mitigate
    # server congestion and client battery use.  To batch unconditionally,
    # set to 1.
    'MAX_UNBATCHED_REMOVE_NOTIFICATIONS': 10,

    # Limits related to the size of file uploads; last few in MB.
    'DATA_UPLOAD_MAX_MEMORY_SIZE': 25 * 1024 * 1024,
    'MAX_AVATAR_FILE_SIZE': 5,
    'MAX_ICON_FILE_SIZE': 5,
    'MAX_LOGO_FILE_SIZE': 5,
    'MAX_EMOJI_FILE_SIZE': 5,

    # Limits to help prevent spam, in particular by sending invitations.
    #
    # A non-admin user who's joined an open realm this recently can't invite at all.
    'INVITES_MIN_USER_AGE_DAYS': 3,
    # Default for a realm's `max_invites`; which applies per day,
    # and only applies if OPEN_REALM_CREATION is true.
    'INVITES_DEFAULT_REALM_DAILY_MAX': 100,
    # Global rate-limit (list of pairs (days, max)) on invites from new realms.
    # Only applies if OPEN_REALM_CREATION is true.
    'INVITES_NEW_REALM_LIMIT_DAYS': [(1, 100)],
    # Definition of a new realm for INVITES_NEW_REALM_LIMIT.
    'INVITES_NEW_REALM_DAYS': 7,

    # Controls for which links are published in portico footers/headers/etc.
    'REGISTER_LINK_DISABLED': None,
    'LOGIN_LINK_DISABLED': False,
    'FIND_TEAM_LINK_DISABLED': True,

    # Controls if the server should run certain jobs like deliver_email or
    # deliver_scheduled_messages. This setting in long term is meant for
    # handling jobs for which we don't have a means of establishing a locking
    # mechanism that works with multiple servers running these jobs.
    # TODO: We should rename this setting so that it reflects its purpose actively.
    'EMAIL_DELIVERER_DISABLED': False,

    # What domains to treat like the root domain
    # "auth" is by default a reserved subdomain for the use by python-social-auth.
    'ROOT_SUBDOMAIN_ALIASES': ["www", "auth"],
    # Whether the root domain is a landing page or can host a realm.
    'ROOT_DOMAIN_LANDING_PAGE': False,

    # If using the Zephyr mirroring supervisord configuration, the
    # hostname to connect to in order to transfer credentials from webathena.
    'PERSONAL_ZMIRROR_SERVER': None,

    # When security-relevant links in emails expire.
    'CONFIRMATION_LINK_DEFAULT_VALIDITY_DAYS': 1,
    'INVITATION_LINK_VALIDITY_DAYS': 10,
    'REALM_CREATION_LINK_VALIDITY_DAYS': 7,

    # By default, Zulip uses websockets to send messages.  In some
    # networks, websockets don't work.  One can configure Zulip to
    # not use websockets here.
    'USE_WEBSOCKETS': True,

    # Version number for ToS.  Change this if you want to force every
    # user to click through to re-accept terms of service before using
    # Zulip again on the web.
    'TOS_VERSION': None,
    # Template to use when bumping TOS_VERSION to explain situation.
    'FIRST_TIME_TOS_TEMPLATE': None,

    # Hostname used for Zulip's statsd logging integration.
    'STATSD_HOST': '',

    # Configuration for JWT auth.
    'JWT_AUTH_KEYS': {},

    # https://docs.djangoproject.com/en/1.11/ref/settings/#std:setting-SERVER_EMAIL
    # Django setting for what from address to use in error emails.  We
    # set this to ZULIP_ADMINISTRATOR by default.
    'SERVER_EMAIL': None,
    # Django setting for who receives error emails.  We set to
    # ZULIP_ADMINISTRATOR by default.
    'ADMINS': '',

    # From address for welcome emails.
    'WELCOME_EMAIL_SENDER': None,
    # Whether we should use users' own email addresses as the from
    # address when sending missed-message emails.  Off by default
    # because some transactional email providers reject sending such
    # emails since they can look like spam.
    'SEND_MISSED_MESSAGE_EMAILS_AS_USER': False,
    # Whether to send periodic digests of activity.  Off by default
    # because this feature is in beta.
    'SEND_DIGEST_EMAILS': False,

    # Used to change the Zulip logo in portico pages.
    'CUSTOM_LOGO_URL': None,

    # Random salt used when deterministically generating passwords in
    # development.
    'INITIAL_PASSWORD_SALT': None,

    # Used to control whether certain management commands are run on
    # the server.
    # TODO: Replace this with a smarter "run on only one server" system.
    'STAGING': False,
    # Configuration option for our email/Zulip error reporting.
    'STAGING_ERROR_NOTIFICATIONS': False,

    # How long to wait before presence should treat a user as offline.
    # TODO: Figure out why this is different from the corresponding
    # value in static/js/presence.js.  Also, probably move it out of
    # DEFAULT_SETTINGS, since it likely isn't usefully user-configurable.
    'OFFLINE_THRESHOLD_SECS': 5 * 60,

    # Enables billing pages and plan-based feature gates. If False, all features
    # are available to all realms.
    'BILLING_ENABLED': False,

    # Automatically catch-up soft deactivated users when running the
    # `soft-deactivate-users` cron. Turn this off if the server has 10Ks of
    # users, and you would like to save some disk space. Soft-deactivated
    # returning users would still be caught-up normally.
    'AUTO_CATCH_UP_SOFT_DEACTIVATED_USERS': True,
})


for setting_name, setting_val in DEFAULT_SETTINGS.items():
    if setting_name not in vars():
        vars()[setting_name] = setting_val

# These are the settings that we will check that the user has filled in for
# production deployments before starting the app.  It consists of a series
# of pairs of (setting name, default value that it must be changed from)
REQUIRED_SETTINGS = [("EXTERNAL_HOST", "zulip.example.com"),
                     ("ZULIP_ADMINISTRATOR", "zulip-admin@example.com"),
                     # SECRET_KEY doesn't really need to be here, in
                     # that we set it automatically, but just in
                     # case, it seems worth having in this list
                     ("SECRET_KEY", ""),
                     ("AUTHENTICATION_BACKENDS", ()),
                     ]

if ADMINS == "":
    ADMINS = (("Zulip Administrator", ZULIP_ADMINISTRATOR),)
MANAGERS = ADMINS

########################################################################
# STANDARD DJANGO SETTINGS
########################################################################

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# In a Windows environment this must be set to your system time zone.
TIME_ZONE = 'UTC'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True

# If you set this to False, Django will not use timezone-aware datetimes.
USE_TZ = True

# this directory will be used to store logs for development environment
DEVELOPMENT_LOG_DIRECTORY = os.path.join(DEPLOY_ROOT, 'var', 'log')
# Make redirects work properly behind a reverse proxy
USE_X_FORWARDED_HOST = True

# Extend ALLOWED_HOSTS with localhost (needed to RPC to Tornado),
ALLOWED_HOSTS += ['127.0.0.1', 'localhost']
# ... with hosts corresponding to EXTERNAL_HOST,
ALLOWED_HOSTS += [EXTERNAL_HOST.split(":")[0],
                  '.' + EXTERNAL_HOST.split(":")[0]]
# ... and with the hosts in REALM_HOSTS.
ALLOWED_HOSTS += REALM_HOSTS.values()

from django.template.loaders import app_directories
class TwoFactorLoader(app_directories.Loader):
    def get_dirs(self):
        dirs = super().get_dirs()
        return [d for d in dirs if 'two_factor' in d]

MIDDLEWARE = (
    # With the exception of it's dependencies,
    # our logging middleware should be the top middleware item.
    'zerver.middleware.TagRequests',
    'zerver.middleware.SetRemoteAddrFromForwardedFor',
    'zerver.middleware.LogRequests',
    'zerver.middleware.JsonErrorHandler',
    'zerver.middleware.RateLimitMiddleware',
    'zerver.middleware.FlushDisplayRecipientCache',
    'django.middleware.common.CommonMiddleware',
    'zerver.middleware.SessionHostDomainMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    # Make sure 2FA middlewares come after authentication middleware.
    'django_otp.middleware.OTPMiddleware',  # Required by Two Factor auth.
    'two_factor.middleware.threadlocals.ThreadLocals',  # Required by Twilio
    # Needs to be after CommonMiddleware, which sets Content-Length
    'zerver.middleware.FinalizeOpenGraphDescription',
)

ANONYMOUS_USER_ID = None

AUTH_USER_MODEL = "zerver.UserProfile"

TEST_RUNNER = 'zerver.lib.test_runner.Runner'

ROOT_URLCONF = 'zproject.urls'

# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'zproject.wsgi.application'

# A site can include additional installed apps via the
# EXTRA_INSTALLED_APPS setting
INSTALLED_APPS = [
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.staticfiles',
    'confirmation',
    'pipeline',
    'webpack_loader',
    'zerver',
    'social_django',
    # 2FA related apps.
    'django_otp',
    'django_otp.plugins.otp_static',
    'django_otp.plugins.otp_totp',
    'two_factor',
]
if USING_PGROONGA:
    INSTALLED_APPS += ['pgroonga']
INSTALLED_APPS += EXTRA_INSTALLED_APPS

ZILENCER_ENABLED = 'zilencer' in INSTALLED_APPS
CORPORATE_ENABLED = 'corporate' in INSTALLED_APPS

# Base URL of the Tornado server
# We set it to None when running backend tests or populate_db.
# We override the port number when running frontend tests.
TORNADO_PROCESSES = int(get_config('application_server', 'tornado_processes', 1))
TORNADO_SERVER = 'http://127.0.0.1:9993'
RUNNING_INSIDE_TORNADO = False
AUTORELOAD = DEBUG

SILENCED_SYSTEM_CHECKS = [
    # auth.W004 checks that the UserProfile field named by USERNAME_FIELD has
    # `unique=True`.  For us this is `email`, and it's unique only per-realm.
    # Per Django docs, this is perfectly fine so long as our authentication
    # backends support the username not being unique; and they do.
    # See: https://docs.djangoproject.com/en/1.11/topics/auth/customizing/#django.contrib.auth.models.CustomUser.USERNAME_FIELD
    "auth.W004",
]

########################################################################
# DATABASE CONFIGURATION
########################################################################

DATABASES = {"default": {
    'ENGINE': 'django.db.backends.postgresql',
    'NAME': 'zulip',
    'USER': 'zulip',
    'PASSWORD': '',  # Authentication done via certificates
    'HOST': '',  # Host = '' => connect through a local socket
    'SCHEMA': 'zulip',
    'CONN_MAX_AGE': 600,
    'OPTIONS': {
        'connection_factory': TimeTrackingConnection
    },
}}

if DEVELOPMENT:
    LOCAL_DATABASE_PASSWORD = get_secret("local_database_password")
    DATABASES["default"].update({
        'PASSWORD': LOCAL_DATABASE_PASSWORD,
        'HOST': 'localhost'
    })
elif REMOTE_POSTGRES_HOST != '':
    DATABASES['default'].update({
        'HOST': REMOTE_POSTGRES_HOST,
    })
    if get_secret("postgres_password") is not None:
        DATABASES['default'].update({
            'PASSWORD': get_secret("postgres_password"),
        })
    if REMOTE_POSTGRES_SSLMODE != '':
        DATABASES['default']['OPTIONS']['sslmode'] = REMOTE_POSTGRES_SSLMODE
    else:
        DATABASES['default']['OPTIONS']['sslmode'] = 'verify-full'

########################################################################
# RABBITMQ CONFIGURATION
########################################################################

USING_RABBITMQ = True
RABBITMQ_PASSWORD = get_secret("rabbitmq_password")

########################################################################
# CACHING CONFIGURATION
########################################################################

SESSION_ENGINE = "django.contrib.sessions.backends.cached_db"

# Compress large values being stored in memcached; this is important
# for at least the realm_users cache.
PYLIBMC_MIN_COMPRESS_LEN = 100 * 1024
PYLIBMC_COMPRESS_LEVEL = 1

CACHES = {
    'default': {
        'BACKEND': 'django_pylibmc.memcached.PyLibMCCache',
        'LOCATION': MEMCACHED_LOCATION,
        'TIMEOUT': 3600,
        'OPTIONS': {
            'verify_keys': True,
            'tcp_nodelay': True,
            'retry_timeout': 1,
        }
    },
    'database': {
        'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
        'LOCATION': 'third_party_api_results',
        # This cache shouldn't timeout; we're really just using the
        # cache API to store the results of requests to third-party
        # APIs like the Twitter API permanently.
        'TIMEOUT': None,
        'OPTIONS': {
            'MAX_ENTRIES': 100000000,
            'CULL_FREQUENCY': 10,
        }
    },
}

########################################################################
# REDIS-BASED RATE LIMITING CONFIGURATION
########################################################################

RATE_LIMITING_RULES = [
    (60, 200),  # 200 requests max every minute
]

RATE_LIMITING_MIRROR_REALM_RULES = [
    (60, 50),  # 50 emails per minute
    (300, 120),  # 120 emails per 5 minutes
    (3600, 600),  # 600 emails per hour
]

DEBUG_RATE_LIMITING = DEBUG
REDIS_PASSWORD = get_secret('redis_password')

########################################################################
# SECURITY SETTINGS
########################################################################

# Tell the browser to never send our cookies without encryption, e.g.
# when executing the initial http -> https redirect.
#
# Turn it off for local testing because we don't have SSL.
if PRODUCTION:
    SESSION_COOKIE_SECURE = True
    CSRF_COOKIE_SECURE = True

    # For get_updates hostname sharding.
    domain = get_config('django', 'cookie_domain', None)
    if domain is not None:
        CSRF_COOKIE_DOMAIN = '.' + domain

# Prevent Javascript from reading the CSRF token from cookies.  Our code gets
# the token from the DOM, which means malicious code could too.  But hiding the
# cookie will slow down some attackers.
CSRF_COOKIE_PATH = '/;HttpOnly'
CSRF_FAILURE_VIEW = 'zerver.middleware.csrf_failure'

if DEVELOPMENT:
    # Use fast password hashing for creating testing users when not
    # PRODUCTION.  Saves a bunch of time.
    PASSWORD_HASHERS = (
        'django.contrib.auth.hashers.SHA1PasswordHasher',
        'django.contrib.auth.hashers.PBKDF2PasswordHasher'
    )
    # Also we auto-generate passwords for the default users which you
    # can query using ./manage.py print_initial_password
    INITIAL_PASSWORD_SALT = get_secret("initial_password_salt")
else:
    # For production, use the best password hashing algorithm: Argon2
    # Zulip was originally on PBKDF2 so we need it for compatibility
    PASSWORD_HASHERS = ('django.contrib.auth.hashers.Argon2PasswordHasher',
                        'django.contrib.auth.hashers.PBKDF2PasswordHasher')

########################################################################
# API/BOT SETTINGS
########################################################################

ROOT_DOMAIN_URI = EXTERNAL_URI_SCHEME + EXTERNAL_HOST

if "NAGIOS_BOT_HOST" not in vars():
    NAGIOS_BOT_HOST = EXTERNAL_HOST

S3_KEY = get_secret("s3_key")
S3_SECRET_KEY = get_secret("s3_secret_key")

if LOCAL_UPLOADS_DIR is not None:
    if SENDFILE_BACKEND is None:
        SENDFILE_BACKEND = 'sendfile.backends.nginx'
    SENDFILE_ROOT = os.path.join(LOCAL_UPLOADS_DIR, "files")
    SENDFILE_URL = '/serve_uploads'

# GCM tokens are IP-whitelisted; if we deploy to additional
# servers you will need to explicitly add their IPs here:
# https://cloud.google.com/console/project/apps~zulip-android/apiui/credential
ANDROID_GCM_API_KEY = get_secret("android_gcm_api_key")

GOOGLE_OAUTH2_CLIENT_SECRET = get_secret('google_oauth2_client_secret')

DROPBOX_APP_KEY = get_secret("dropbox_app_key")

MAILCHIMP_API_KEY = get_secret("mailchimp_api_key")

# Twitter API credentials
# Secrecy not required because its only used for R/O requests.
# Please don't make us go over our rate limit.
TWITTER_CONSUMER_KEY = get_secret("twitter_consumer_key")
TWITTER_CONSUMER_SECRET = get_secret("twitter_consumer_secret")
TWITTER_ACCESS_TOKEN_KEY = get_secret("twitter_access_token_key")
TWITTER_ACCESS_TOKEN_SECRET = get_secret("twitter_access_token_secret")

# These are the bots that Zulip sends automated messages as.
INTERNAL_BOTS = [{'var_name': 'NOTIFICATION_BOT',
                  'email_template': 'notification-bot@%s',
                  'name': 'Notification Bot'},
                 {'var_name': 'EMAIL_GATEWAY_BOT',
                  'email_template': 'emailgateway@%s',
                  'name': 'Email Gateway'},
                 {'var_name': 'NAGIOS_SEND_BOT',
                  'email_template': 'nagios-send-bot@%s',
                  'name': 'Nagios Send Bot'},
                 {'var_name': 'NAGIOS_RECEIVE_BOT',
                  'email_template': 'nagios-receive-bot@%s',
                  'name': 'Nagios Receive Bot'},
                 {'var_name': 'WELCOME_BOT',
                  'email_template': 'welcome-bot@%s',
                  'name': 'Welcome Bot'}]

# Bots that are created for each realm like the reminder-bot goes here.
REALM_INTERNAL_BOTS = []
# These are realm-internal bots that may exist in some organizations,
# so configure power the setting, but should not be auto-created at this time.
DISABLED_REALM_INTERNAL_BOTS = [
    {'var_name': 'REMINDER_BOT',
     'email_template': 'reminder-bot@%s',
     'name': 'Reminder Bot'}
]

if PRODUCTION:
    INTERNAL_BOTS += [
        {'var_name': 'NAGIOS_STAGING_SEND_BOT',
         'email_template': 'nagios-staging-send-bot@%s',
         'name': 'Nagios Staging Send Bot'},
        {'var_name': 'NAGIOS_STAGING_RECEIVE_BOT',
         'email_template': 'nagios-staging-receive-bot@%s',
         'name': 'Nagios Staging Receive Bot'},
    ]

INTERNAL_BOT_DOMAIN = "zulip.com"

# Set the realm-specific bot names
for bot in INTERNAL_BOTS + REALM_INTERNAL_BOTS + DISABLED_REALM_INTERNAL_BOTS:
    if vars().get(bot['var_name']) is None:
        bot_email = bot['email_template'] % (INTERNAL_BOT_DOMAIN,)
        vars()[bot['var_name']] = bot_email

if EMAIL_GATEWAY_PATTERN != "":
    EMAIL_GATEWAY_EXAMPLE = EMAIL_GATEWAY_PATTERN % ("support+abcdefg",)
else:
    EMAIL_GATEWAY_EXAMPLE = ""

########################################################################
# STATSD CONFIGURATION
########################################################################

# Statsd is not super well supported; if you want to use it you'll need
# to set STATSD_HOST and STATSD_PREFIX.
if STATSD_HOST != '':
    INSTALLED_APPS += ['django_statsd']
    STATSD_PORT = 8125
    STATSD_CLIENT = 'django_statsd.clients.normal'

########################################################################
# CAMO HTTPS CACHE CONFIGURATION
########################################################################

if CAMO_URI != '':
    # This needs to be synced with the Camo installation
    CAMO_KEY = get_secret("camo_key")

########################################################################
# STATIC CONTENT AND MINIFICATION SETTINGS
########################################################################

STATIC_URL = '/static/'

# ZulipStorage is a modified version of PipelineCachedStorage,
# and, like that class, it inserts a file hash into filenames
# to prevent the browser from using stale files from cache.
#
# Unlike PipelineStorage, it requires the files to exist in
# STATIC_ROOT even for dev servers.  So we only use
# ZulipStorage when not DEBUG.

# This is the default behavior from Pipeline, but we set it
# here so that urls.py can read it.
PIPELINE_ENABLED = not DEBUG

if DEBUG:
    STATICFILES_STORAGE = 'pipeline.storage.PipelineStorage'
    STATICFILES_FINDERS = (
        'django.contrib.staticfiles.finders.AppDirectoriesFinder',
        'pipeline.finders.PipelineFinder',
    )
    if PIPELINE_ENABLED:
        STATIC_ROOT = os.path.abspath(os.path.join(DEPLOY_ROOT, 'prod-static/serve'))
    else:
        STATIC_ROOT = os.path.abspath(os.path.join(DEPLOY_ROOT, 'static/'))
else:
    STATICFILES_STORAGE = 'zerver.lib.storage.ZulipStorage'
    STATICFILES_FINDERS = (
        'django.contrib.staticfiles.finders.FileSystemFinder',
        'pipeline.finders.PipelineFinder',
    )
    if PRODUCTION:
        STATIC_ROOT = '/home/zulip/prod-static'
    else:
        STATIC_ROOT = os.path.abspath(os.path.join(DEPLOY_ROOT, 'prod-static/serve'))

# If changing this, you need to also the hack modifications to this in
# our compilemessages management command.
LOCALE_PATHS = (os.path.join(STATIC_ROOT, 'locale'),)

# We want all temporary uploaded files to be stored on disk.
FILE_UPLOAD_MAX_MEMORY_SIZE = 0

STATICFILES_DIRS = ['static/']
STATIC_HEADER_FILE = 'zerver/static_header.txt'

# To use minified files in dev, set PIPELINE_ENABLED = True.  For the full
# cache-busting behavior, you must also set DEBUG = False.
#
# You will need to run update-prod-static after changing
# static files.
#
# Useful reading on how this works is in
# https://zulip.readthedocs.io/en/latest/subsystems/front-end-build-process.html

PIPELINE = {
    'PIPELINE_ENABLED': PIPELINE_ENABLED,
    'CSS_COMPRESSOR': 'pipeline.compressors.yui.YUICompressor',
    'YUI_BINARY': '/usr/bin/env yui-compressor',
    'STYLESHEETS': {},
    'JAVASCRIPT': {},
}

# Useful reading on how this works is in
# https://zulip.readthedocs.io/en/latest/subsystems/front-end-build-process.html
JS_SPECS = {
    # One of the main reason we are treating the following bundles separately
    # from webpack is we want to reduce the webpack compile time since These
    # files are very large in size and are already minified or being minified
    # in the pipeline itself
    # We also want to minify sockjs separately for the sockjs iframe transport
    'sockjs': {
        'source_filenames': ['third/sockjs/sockjs-0.3.4.js'],
        'output_filename': 'min/sockjs-0.3.4.min.js'
    },
    # Even though we've moved the main KaTeX copy into Webpack, we
    # also need KaTeX to be runnable directly via Node (Called from
    # zerver/lib/tex.py which calls static/third/katex/cli.js.  Since
    # our Webpack setup doesn't provide a good way to name the current
    # version of a module, we use the legacy django-pipeline system
    # for bundling KaTeX.
    'katex': {
        'source_filenames': [
            'node_modules/katex/dist/katex.js',
        ],
        'output_filename': 'min/katex.js',
    },
    # The same legacy treatment is required for zxcvbn, in order to
    # support the settings_account.js use case (where we don't have a
    # good way to look up the path to the file).
    'zxcvbn': {
        'source_filenames': [
            'node_modules/zxcvbn/dist/zxcvbn.js',
        ],
        'output_filename': 'min/zxcvbn.js'
    },
}

if DEVELOPMENT:
    WEBPACK_STATS_FILE = os.path.join('var', 'webpack-stats-dev.json')
else:
    WEBPACK_STATS_FILE = 'webpack-stats-production.json'
WEBPACK_LOADER = {
    'DEFAULT': {
        'CACHE': not DEBUG,
        'BUNDLE_DIR_NAME': 'webpack-bundles/',
        'STATS_FILE': os.path.join(DEPLOY_ROOT, WEBPACK_STATS_FILE),
    }
}

########################################################################
# TEMPLATES SETTINGS
########################################################################

# List of callables that know how to import templates from various sources.
LOADERS = [
    'django.template.loaders.filesystem.Loader',
    'django.template.loaders.app_directories.Loader',
]
if PRODUCTION:
    # Template caching is a significant performance win in production.
    LOADERS = [('django.template.loaders.cached.Loader', LOADERS)]

base_template_engine_settings = {
    'BACKEND': 'django.template.backends.jinja2.Jinja2',
    'OPTIONS': {
        'environment': 'zproject.jinja2.environment',
        'extensions': [
            'jinja2.ext.i18n',
            'jinja2.ext.autoescape',
            'pipeline.jinja2.PipelineExtension',
            'webpack_loader.contrib.jinja2ext.WebpackExtension',
        ],
        'context_processors': [
            'zerver.context_processors.zulip_default_context',
            'django.template.context_processors.i18n',
        ],
    },
}

default_template_engine_settings = deepcopy(base_template_engine_settings)
default_template_engine_settings.update({
    'NAME': 'Jinja2',
    'DIRS': [
        # The main templates directory
        os.path.join(DEPLOY_ROOT, 'templates'),
        # The webhook integration templates
        os.path.join(DEPLOY_ROOT, 'zerver', 'webhooks'),
        # The python-zulip-api:zulip_bots package templates
        os.path.join(STATIC_ROOT, 'generated', 'bots'),
    ],
    'APP_DIRS': True,
})

non_html_template_engine_settings = deepcopy(base_template_engine_settings)
non_html_template_engine_settings.update({
    'NAME': 'Jinja2_plaintext',
    'DIRS': [os.path.join(DEPLOY_ROOT, 'templates')],
    'APP_DIRS': False,
})
non_html_template_engine_settings['OPTIONS'].update({
    'autoescape': False,
    'trim_blocks': True,
    'lstrip_blocks': True,
})

# django-two-factor uses the default Django template engine (not Jinja2), so we
# need to add config for it here.
two_factor_template_options = deepcopy(default_template_engine_settings['OPTIONS'])
del two_factor_template_options['environment']
del two_factor_template_options['extensions']
two_factor_template_options['loaders'] = ['zproject.settings.TwoFactorLoader']

two_factor_template_engine_settings = {
    'NAME': 'Two_Factor',
    'BACKEND': 'django.template.backends.django.DjangoTemplates',
    'DIRS': [],
    'APP_DIRS': False,
    'OPTIONS': two_factor_template_options,
}

# The order here is important; get_template and related/parent functions try
# the template engines in order until one succeeds.
TEMPLATES = [
    default_template_engine_settings,
    non_html_template_engine_settings,
    two_factor_template_engine_settings,
]
########################################################################
# LOGGING SETTINGS
########################################################################

ZULIP_PATHS = [
    ("SERVER_LOG_PATH", "/var/log/zulip/server.log"),
    ("ERROR_FILE_LOG_PATH", "/var/log/zulip/errors.log"),
    ("MANAGEMENT_LOG_PATH", "/var/log/zulip/manage.log"),
    ("WORKER_LOG_PATH", "/var/log/zulip/workers.log"),
    ("JSON_PERSISTENT_QUEUE_FILENAME_PATTERN", "/home/zulip/tornado/event_queues%s.json"),
    ("EMAIL_LOG_PATH", "/var/log/zulip/send_email.log"),
    ("EMAIL_MIRROR_LOG_PATH", "/var/log/zulip/email_mirror.log"),
    ("EMAIL_DELIVERER_LOG_PATH", "/var/log/zulip/email-deliverer.log"),
    ("EMAIL_CONTENT_LOG_PATH", "/var/log/zulip/email_content.log"),
    ("LDAP_SYNC_LOG_PATH", "/var/log/zulip/sync_ldap_user_data.log"),
    ("QUEUE_ERROR_DIR", "/var/log/zulip/queue_error"),
    ("DIGEST_LOG_PATH", "/var/log/zulip/digest.log"),
    ("ANALYTICS_LOG_PATH", "/var/log/zulip/analytics.log"),
    ("ANALYTICS_LOCK_DIR", "/home/zulip/deployments/analytics-lock-dir"),
    ("API_KEY_ONLY_WEBHOOK_LOG_PATH", "/var/log/zulip/webhooks_errors.log"),
    ("SOFT_DEACTIVATION_LOG_PATH", "/var/log/zulip/soft_deactivation.log"),
    ("TRACEMALLOC_DUMP_DIR", "/var/log/zulip/tracemalloc"),
    ("SCHEDULED_MESSAGE_DELIVERER_LOG_PATH",
     "/var/log/zulip/scheduled_message_deliverer.log"),
]

# The Event log basically logs most significant database changes,
# which can be useful for debugging.
if EVENT_LOGS_ENABLED:
    ZULIP_PATHS.append(("EVENT_LOG_DIR", "/home/zulip/logs/event_log"))
else:
    EVENT_LOG_DIR = None

for (var, path) in ZULIP_PATHS:
    if DEVELOPMENT:
        # if DEVELOPMENT, store these files in the Zulip checkout
        if path.startswith("/var/log"):
            path = os.path.join(DEVELOPMENT_LOG_DIRECTORY, os.path.basename(path))
        else:
            path = os.path.join(os.path.join(DEPLOY_ROOT, 'var'), os.path.basename(path))
    vars()[var] = path

ZULIP_WORKER_TEST_FILE = '/tmp/zulip-worker-test-file'


if IS_WORKER:
    FILE_LOG_PATH = WORKER_LOG_PATH
else:
    FILE_LOG_PATH = SERVER_LOG_PATH

# This is disabled in a few tests.
LOGGING_ENABLED = True

DEFAULT_ZULIP_HANDLERS = (
    (['zulip_admins'] if ERROR_REPORTING else []) +
    ['console', 'file', 'errors_file']
)

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'default': {
            '()': 'zerver.lib.logging_util.ZulipFormatter',
        }
    },
    'filters': {
        'ZulipLimiter': {
            '()': 'zerver.lib.logging_util.ZulipLimiter',
        },
        'EmailLimiter': {
            '()': 'zerver.lib.logging_util.EmailLimiter',
        },
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse',
        },
        'require_debug_true': {
            '()': 'django.utils.log.RequireDebugTrue',
        },
        'nop': {
            '()': 'zerver.lib.logging_util.ReturnTrue',
        },
        'require_logging_enabled': {
            '()': 'zerver.lib.logging_util.ReturnEnabled',
        },
        'require_really_deployed': {
            '()': 'zerver.lib.logging_util.RequireReallyDeployed',
        },
        'skip_200_and_304': {
            '()': 'django.utils.log.CallbackFilter',
            'callback': zerver.lib.logging_util.skip_200_and_304,
        },
        'skip_boring_404s': {
            '()': 'django.utils.log.CallbackFilter',
            'callback': zerver.lib.logging_util.skip_boring_404s,
        },
        'skip_site_packages_logs': {
            '()': 'django.utils.log.CallbackFilter',
            'callback': zerver.lib.logging_util.skip_site_packages_logs,
        },
    },
    'handlers': {
        'zulip_admins': {
            'level': 'ERROR',
            'class': 'zerver.logging_handlers.AdminNotifyHandler',
            'filters': (['ZulipLimiter', 'require_debug_false', 'require_really_deployed']
                        if not DEBUG_ERROR_REPORTING else []),
            'formatter': 'default'
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'default'
        },
        'file': {
            'level': 'DEBUG',
            'class': 'logging.handlers.WatchedFileHandler',
            'formatter': 'default',
            'filename': FILE_LOG_PATH,
        },
        'errors_file': {
            'level': 'WARNING',
            'class': 'logging.handlers.WatchedFileHandler',
            'formatter': 'default',
            'filename': ERROR_FILE_LOG_PATH,
        },
    },
    'loggers': {
        # The Python logging module uses a hierarchy of logger names for config:
        # "foo.bar" has parent "foo" has parent "", the root.  But the semantics
        # are subtle: it walks this hierarchy once to find the log level to
        # decide whether to log the record at all, then a separate time to find
        # handlers to emit the record.
        #
        # For `level`, the most specific ancestor that has a `level` counts.
        # For `handlers`, the most specific ancestor that has a `handlers`
        # counts (assuming we set `propagate=False`, which we always do.)
        # These are independent -- they might come at the same layer, or
        # either one could come before the other.
        #
        # For `filters`, no ancestors count at all -- only the exact logger name
        # the record was logged at.
        #
        # Upstream docs: https://docs.python.org/3/library/logging
        #
        # Style rules:
        #  * Always set `propagate=False` if setting `handlers`.
        #  * Setting `level` equal to the parent is redundant; don't.
        #  * Setting `handlers` equal to the parent is redundant; don't.
        #  * Always write in order: level, filters, handlers, propagate.

        # root logger
        '': {
            'level': 'INFO',
            'filters': ['require_logging_enabled'],
            'handlers': DEFAULT_ZULIP_HANDLERS,
        },

        # Django, alphabetized
        'django': {
            # Django's default logging config has already set some
            # things on this logger.  Just mentioning it here causes
            # `logging.config` to reset it to defaults, as if never
            # configured; which is what we want for it.
        },
        'django.request': {
            'level': 'WARNING',
            'filters': ['skip_boring_404s'],
        },
        'django.security.DisallowedHost': {
            'handlers': ['file'],
            'propagate': False,
        },
        'django.server': {
            'filters': ['skip_200_and_304'],
            'handlers': ['console', 'file'],
            'propagate': False,
        },
        'django.template': {
            'level': 'DEBUG',
            'filters': ['require_debug_true', 'skip_site_packages_logs'],
            'handlers': ['console'],
            'propagate': False,
        },

        ## Uncomment the following to get all database queries logged to the console
        # 'django.db': {
        #     'level': 'DEBUG',
        #     'handlers': ['console'],
        #     'propagate': False,
        # },

        # other libraries, alphabetized
        'pika.adapters': {
            # pika is super chatty on INFO.
            'level': 'WARNING',
            # pika spews a lot of ERROR logs when a connection fails.
            # We reconnect automatically, so those should be treated as WARNING --
            # write to the log for use in debugging, but no error emails/Zulips.
            'handlers': ['console', 'file', 'errors_file'],
            'propagate': False,
        },
        'pika.connection': {
            # Leave `zulip_admins` out of the handlers.  See pika.adapters above.
            'handlers': ['console', 'file', 'errors_file'],
            'propagate': False,
        },
        'requests': {
            'level': 'WARNING',
        },
        'tornado.general': {
            # sockjs.tornado sends a lot of ERROR level logs to this
            # logger.  These should not result in error emails/Zulips.
            #
            # TODO: Ideally, we'd do something that just filters the
            # sockjs.tornado logging entirely, since other Tornado
            # logging may be of interest.  Might require patching
            # sockjs.tornado to do this correctly :(.
            'handlers': ['console', 'file'],
            'propagate': False,
        },

        # our own loggers, alphabetized
        'zerver.lib.digest': {
            'level': 'DEBUG',
        },
        'zerver.management.commands.deliver_email': {
            'level': 'DEBUG',
        },
        'zerver.management.commands.enqueue_digest_emails': {
            'level': 'DEBUG',
        },
        'zerver.management.commands.deliver_scheduled_messages': {
            'level': 'DEBUG',
        },
        'zulip.management': {
            'handlers': ['file', 'errors_file'],
            'propagate': False,
        },
        'zulip.queue': {
            'level': 'WARNING',
        },
        'zulip.soft_deactivation': {
            'handlers': ['file', 'errors_file'],
            'propagate': False,
        },
        'zulip.zerver.webhooks': {
            'level': 'DEBUG',
            'handlers': ['file', 'errors_file'],
            'propagate': False,
        },
    }
}

LOGIN_REDIRECT_URL = '/'

# Client-side polling timeout for get_events, in milliseconds.
# We configure this here so that the client test suite can override it.
# We already kill the connection server-side with heartbeat events,
# but it's good to have a safety.  This value should be greater than
# (HEARTBEAT_MIN_FREQ_SECS + 10)
POLL_TIMEOUT = 90 * 1000

# iOS App IDs
ZULIP_IOS_APP_ID = 'org.zulip.Zulip'

########################################################################
# SSO AND LDAP SETTINGS
########################################################################

USING_APACHE_SSO = ('zproject.backends.ZulipRemoteUserBackend' in AUTHENTICATION_BACKENDS)

if 'LDAP_DEACTIVATE_NON_MATCHING_USERS' not in vars():
    LDAP_DEACTIVATE_NON_MATCHING_USERS = (
        len(AUTHENTICATION_BACKENDS) == 1 and (AUTHENTICATION_BACKENDS[0] ==
                                               "zproject.backends.ZulipLDAPAuthBackend"))

if len(AUTHENTICATION_BACKENDS) == 1 and (AUTHENTICATION_BACKENDS[0] ==
                                          "zproject.backends.ZulipRemoteUserBackend"):
    HOME_NOT_LOGGED_IN = "/accounts/login/sso/"
    ONLY_SSO = True
else:
    HOME_NOT_LOGGED_IN = '/login/'
    ONLY_SSO = False
AUTHENTICATION_BACKENDS += ('zproject.backends.ZulipDummyBackend',)

# Redirect to /devlogin/ by default in dev mode
if DEVELOPMENT:
    HOME_NOT_LOGGED_IN = '/devlogin/'
    LOGIN_URL = '/devlogin/'

POPULATE_PROFILE_VIA_LDAP = bool(AUTH_LDAP_SERVER_URI)

if POPULATE_PROFILE_VIA_LDAP and \
   'zproject.backends.ZulipLDAPAuthBackend' not in AUTHENTICATION_BACKENDS:
    AUTHENTICATION_BACKENDS += ('zproject.backends.ZulipLDAPUserPopulator',)
else:
    POPULATE_PROFILE_VIA_LDAP = (
        'zproject.backends.ZulipLDAPAuthBackend' in AUTHENTICATION_BACKENDS or
        POPULATE_PROFILE_VIA_LDAP)

if POPULATE_PROFILE_VIA_LDAP:
    import ldap
    if (AUTH_LDAP_BIND_DN and ldap.OPT_REFERRALS not in AUTH_LDAP_CONNECTION_OPTIONS):
        # The default behavior of python-ldap (without setting option
        # `ldap.OPT_REFERRALS`) is to follow referrals, but anonymously.
        # If our original query was non-anonymous, that's unlikely to
        # work; skip the referral.
        #
        # The common case of this is that the server is Active Directory,
        # it's already given us the answer we need, and the referral is
        # just speculation about someplace else that has data our query
        # could in principle match.
        AUTH_LDAP_CONNECTION_OPTIONS[ldap.OPT_REFERRALS] = 0

if REGISTER_LINK_DISABLED is None:
    # The default for REGISTER_LINK_DISABLED is a bit more
    # complicated: we want it to be disabled by default for people
    # using the LDAP backend that auto-creates users on login.
    if (len(AUTHENTICATION_BACKENDS) == 2 and
            ('zproject.backends.ZulipLDAPAuthBackend' in AUTHENTICATION_BACKENDS)):
        REGISTER_LINK_DISABLED = True
    else:
        REGISTER_LINK_DISABLED = False

########################################################################
# SOCIAL AUTHENTICATION SETTINGS
########################################################################

SOCIAL_AUTH_FIELDS_STORED_IN_SESSION = ['subdomain', 'is_signup', 'mobile_flow_otp', 'multiuse_object_key']
SOCIAL_AUTH_LOGIN_ERROR_URL = '/login/'

SOCIAL_AUTH_GITHUB_SECRET = get_secret('social_auth_github_secret')
SOCIAL_AUTH_GITHUB_SCOPE = ['user:email']
SOCIAL_AUTH_GITHUB_ORG_KEY = SOCIAL_AUTH_GITHUB_KEY
SOCIAL_AUTH_GITHUB_ORG_SECRET = SOCIAL_AUTH_GITHUB_SECRET
SOCIAL_AUTH_GITHUB_TEAM_KEY = SOCIAL_AUTH_GITHUB_KEY
SOCIAL_AUTH_GITHUB_TEAM_SECRET = SOCIAL_AUTH_GITHUB_SECRET

SOCIAL_AUTH_PIPELINE = [
    'social_core.pipeline.social_auth.social_details',
    'zproject.backends.social_auth_associate_user',
    'zproject.backends.social_auth_finish',
]

########################################################################
# EMAIL SETTINGS
########################################################################

# Django setting. Not used in the Zulip codebase.
DEFAULT_FROM_EMAIL = ZULIP_ADMINISTRATOR

if EMAIL_BACKEND is not None:
    # If the server admin specified a custom email backend, use that.
    pass
elif DEVELOPMENT:
    # In the dev environment, emails are printed to the run-dev.py console.
    EMAIL_BACKEND = 'zproject.email_backends.EmailLogBackEnd'
elif not EMAIL_HOST:
    # If an email host is not specified, fail gracefully
    WARN_NO_EMAIL = True
    EMAIL_BACKEND = 'django.core.mail.backends.dummy.EmailBackend'
else:
    EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'

EMAIL_HOST_PASSWORD = get_secret('email_password')
EMAIL_GATEWAY_PASSWORD = get_secret('email_gateway_password')
AUTH_LDAP_BIND_PASSWORD = get_secret('auth_ldap_bind_password', '')

# Set the sender email address for Django traceback error reporting
if SERVER_EMAIL is None:
    SERVER_EMAIL = ZULIP_ADMINISTRATOR

########################################################################
# MISC SETTINGS
########################################################################

if PRODUCTION:
    # Filter out user data
    DEFAULT_EXCEPTION_REPORTER_FILTER = 'zerver.filters.ZulipExceptionReporterFilter'

# This is a debugging option only
PROFILE_ALL_REQUESTS = False

CROSS_REALM_BOT_EMAILS = {
    'feedback@zulip.com',
    'notification-bot@zulip.com',
    'welcome-bot@zulip.com',
    'new-user-bot@zulip.com',
    'emailgateway@zulip.com',
}

CONTRIBUTORS_DATA = os.path.join(STATIC_ROOT, 'generated/github-contributors.json')

THUMBOR_KEY = get_secret('thumbor_key')