from email.headerregistry import Address from typing import Any, Dict, List, Mapping, Optional, Union from django.conf import settings from django.contrib.auth.models import AnonymousUser from django.core.files.uploadedfile import UploadedFile from django.http import HttpRequest, HttpResponse from django.shortcuts import redirect from django.utils.translation import gettext as _ from zerver.actions.bots import ( do_change_bot_owner, do_change_default_all_public_streams, do_change_default_events_register_stream, do_change_default_sending_stream, ) from zerver.actions.create_user import do_create_user, do_reactivate_user, notify_created_bot from zerver.actions.custom_profile_fields import ( check_remove_custom_profile_field_value, do_update_user_custom_profile_data_if_changed, ) from zerver.actions.user_settings import ( check_change_bot_full_name, check_change_full_name, do_change_avatar_fields, do_regenerate_api_key, ) from zerver.actions.users import ( do_change_user_role, do_deactivate_user, do_update_bot_config_data, do_update_outgoing_webhook_service, ) from zerver.context_processors import get_valid_realm_from_request from zerver.decorator import require_member_or_admin, require_realm_admin from zerver.forms import PASSWORD_TOO_WEAK_ERROR, CreateUserForm from zerver.lib.avatar import avatar_url, get_avatar_for_inaccessible_user, get_gravatar_url from zerver.lib.bot_config import set_bot_config from zerver.lib.email_validation import email_allowed_for_realm from zerver.lib.exceptions import ( CannotDeactivateLastUserError, JsonableError, MissingAuthenticationError, OrganizationAdministratorRequiredError, OrganizationOwnerRequiredError, ) from zerver.lib.integrations import EMBEDDED_BOTS from zerver.lib.rate_limiter import rate_limit_spectator_attachment_access_by_file from zerver.lib.request import REQ, has_request_variables from zerver.lib.response import json_success from zerver.lib.send_email import FromAddress, send_email from zerver.lib.streams import access_stream_by_id, access_stream_by_name, subscribed_to_stream from zerver.lib.types import ProfileDataElementUpdateDict, ProfileDataElementValue, Validator from zerver.lib.upload import upload_avatar_image from zerver.lib.url_encoding import append_url_query_string from zerver.lib.users import ( APIUserDict, access_bot_by_id, access_user_by_email, access_user_by_id, add_service, check_bot_creation_policy, check_bot_name_available, check_can_access_user, check_full_name, check_short_name, check_valid_bot_config, check_valid_bot_type, check_valid_interface_type, get_api_key, get_users_for_api, max_message_id_for_user, validate_user_custom_profile_data, ) from zerver.lib.utils import generate_api_key from zerver.lib.validator import ( check_bool, check_capped_string, check_dict, check_dict_only, check_int, check_int_in, check_list, check_none_or, check_string, check_union, check_url, ) from zerver.models import Service, Stream, UserProfile from zerver.models.realms import ( DisposableEmailError, DomainNotAllowedForRealmError, EmailContainsPlusError, InvalidFakeEmailDomainError, ) from zerver.models.users import ( get_user_by_delivery_email, get_user_by_id_in_realm_including_cross_realm, get_user_including_cross_realm, get_user_profile_by_id_in_realm, ) from zproject.backends import check_password_strength def check_last_owner(user_profile: UserProfile) -> bool: owners = set(user_profile.realm.get_human_owner_users()) return user_profile.is_realm_owner and not user_profile.is_bot and len(owners) == 1 @has_request_variables def deactivate_user_backend( request: HttpRequest, user_profile: UserProfile, user_id: int, deactivation_notification_comment: Optional[str] = REQ( str_validator=check_capped_string(max_length=2000), default=None ), ) -> HttpResponse: target = access_user_by_id(user_profile, user_id, for_admin=True) if target.is_realm_owner and not user_profile.is_realm_owner: raise OrganizationOwnerRequiredError if check_last_owner(target): raise JsonableError(_("Cannot deactivate the only organization owner")) if deactivation_notification_comment is not None: deactivation_notification_comment = deactivation_notification_comment.strip() return _deactivate_user_profile_backend( request, user_profile, target, deactivation_notification_comment=deactivation_notification_comment, ) def deactivate_user_own_backend(request: HttpRequest, user_profile: UserProfile) -> HttpResponse: if UserProfile.objects.filter(realm=user_profile.realm, is_active=True).count() == 1: raise CannotDeactivateLastUserError(is_last_owner=False) if user_profile.is_realm_owner and check_last_owner(user_profile): raise CannotDeactivateLastUserError(is_last_owner=True) do_deactivate_user(user_profile, acting_user=user_profile) return json_success(request) def deactivate_bot_backend( request: HttpRequest, user_profile: UserProfile, bot_id: int ) -> HttpResponse: target = access_bot_by_id(user_profile, bot_id) return _deactivate_user_profile_backend( request, user_profile, target, deactivation_notification_comment=None ) def _deactivate_user_profile_backend( request: HttpRequest, user_profile: UserProfile, target: UserProfile, *, deactivation_notification_comment: Optional[str], ) -> HttpResponse: do_deactivate_user(target, acting_user=user_profile) # It's important that we check for None explicitly here, since "" # encodes sending an email without a custom administrator comment. if deactivation_notification_comment is not None: send_email( "zerver/emails/deactivate", to_user_ids=[target.id], from_address=FromAddress.NOREPLY, context={ "deactivation_notification_comment": deactivation_notification_comment, "realm_uri": target.realm.uri, "realm_name": target.realm.name, }, ) return json_success(request) def reactivate_user_backend( request: HttpRequest, user_profile: UserProfile, user_id: int ) -> HttpResponse: target = access_user_by_id( user_profile, user_id, allow_deactivated=True, allow_bots=True, for_admin=True ) if target.is_bot: assert target.bot_type is not None check_bot_creation_policy(user_profile, target.bot_type) check_bot_name_available(user_profile.realm_id, target.full_name, is_activation=True) do_reactivate_user(target, acting_user=user_profile) return json_success(request) check_profile_data: Validator[List[Dict[str, Optional[Union[int, ProfileDataElementValue]]]]] = ( check_list( check_dict_only( [ ("id", check_int), ( "value", check_none_or( check_union([check_string, check_list(check_int)]), ), ), ] ), ) ) @has_request_variables def update_user_backend( request: HttpRequest, user_profile: UserProfile, user_id: int, full_name: Optional[str] = REQ(default=None), role: Optional[int] = REQ( default=None, json_validator=check_int_in( UserProfile.ROLE_TYPES, ), ), profile_data: Optional[List[Dict[str, Optional[Union[int, ProfileDataElementValue]]]]] = REQ( default=None, json_validator=check_profile_data, ), ) -> HttpResponse: target = access_user_by_id( user_profile, user_id, allow_deactivated=True, allow_bots=True, for_admin=True ) if role is not None and target.role != role: # Require that the current user has permissions to # grant/remove the role in question. # # Logic replicated in patch_bot_backend. if UserProfile.ROLE_REALM_OWNER in [role, target.role] and not user_profile.is_realm_owner: raise OrganizationOwnerRequiredError elif not user_profile.is_realm_admin: raise OrganizationAdministratorRequiredError if target.role == UserProfile.ROLE_REALM_OWNER and check_last_owner(target): raise JsonableError( _("The owner permission cannot be removed from the only organization owner.") ) do_change_user_role(target, role, acting_user=user_profile) if full_name is not None and target.full_name != full_name and full_name.strip() != "": # We don't respect `name_changes_disabled` here because the request # is on behalf of the administrator. check_change_full_name(target, full_name, user_profile) if profile_data is not None: clean_profile_data: List[ProfileDataElementUpdateDict] = [] for entry in profile_data: assert isinstance(entry["id"], int) assert not isinstance(entry["value"], int) if entry["value"] is None or not entry["value"]: field_id = entry["id"] check_remove_custom_profile_field_value(target, field_id) else: clean_profile_data.append( { "id": entry["id"], "value": entry["value"], } ) validate_user_custom_profile_data(target.realm.id, clean_profile_data) do_update_user_custom_profile_data_if_changed(target, clean_profile_data) return json_success(request) def avatar( request: HttpRequest, maybe_user_profile: Union[UserProfile, AnonymousUser], email_or_id: str, medium: bool = False, ) -> HttpResponse: """Accepts an email address or user ID and returns the avatar""" is_email = False try: int(email_or_id) except ValueError: is_email = True if not maybe_user_profile.is_authenticated: # Allow anonymous access to avatars only if spectators are # enabled in the organization. realm = get_valid_realm_from_request(request) if not realm.allow_web_public_streams_access(): raise MissingAuthenticationError # We only allow the ID format for accessing a user's avatar # for spectators. This is mainly for defense in depth, since # email_address_visibility should mean spectators only # interact with fake email addresses anyway. if is_email: raise MissingAuthenticationError if settings.RATE_LIMITING: unique_avatar_key = f"{realm.id}/{email_or_id}/{medium}" rate_limit_spectator_attachment_access_by_file(unique_avatar_key) else: realm = maybe_user_profile.realm try: if is_email: avatar_user_profile = get_user_including_cross_realm(email_or_id, realm) else: avatar_user_profile = get_user_by_id_in_realm_including_cross_realm( int(email_or_id), realm ) url: Optional[str] = None if maybe_user_profile.is_authenticated and not check_can_access_user( avatar_user_profile, maybe_user_profile ): url = get_avatar_for_inaccessible_user() else: # If there is a valid user account passed in, use its avatar url = avatar_url(avatar_user_profile, medium=medium) assert url is not None except UserProfile.DoesNotExist: # If there is no such user, treat it as a new gravatar email = email_or_id avatar_version = 1 url = get_gravatar_url(email, avatar_version, medium) # We can rely on the URL already having query parameters. Because # our templates depend on being able to use the ampersand to # add query parameters to our url, get_avatar_url does '?x=x' # hacks to prevent us from having to jump through decode/encode hoops. assert url is not None url = append_url_query_string(url, request.META["QUERY_STRING"]) return redirect(url) def avatar_medium( request: HttpRequest, maybe_user_profile: Union[UserProfile, AnonymousUser], email_or_id: str ) -> HttpResponse: return avatar(request, maybe_user_profile, email_or_id, medium=True) def get_stream_name(stream: Optional[Stream]) -> Optional[str]: if stream: return stream.name return None @require_member_or_admin @has_request_variables def patch_bot_backend( request: HttpRequest, user_profile: UserProfile, bot_id: int, full_name: Optional[str] = REQ(default=None), role: Optional[int] = REQ( default=None, json_validator=check_int_in( UserProfile.ROLE_TYPES, ), ), bot_owner_id: Optional[int] = REQ(json_validator=check_int, default=None), config_data: Optional[Dict[str, str]] = REQ( default=None, json_validator=check_dict(value_validator=check_string) ), service_payload_url: Optional[str] = REQ(json_validator=check_url, default=None), service_interface: int = REQ(json_validator=check_int, default=1), default_sending_stream: Optional[str] = REQ(default=None), default_events_register_stream: Optional[str] = REQ(default=None), default_all_public_streams: Optional[bool] = REQ(default=None, json_validator=check_bool), ) -> HttpResponse: bot = access_bot_by_id(user_profile, bot_id) if full_name is not None: check_change_bot_full_name(bot, full_name, user_profile) if role is not None and bot.role != role: # Logic duplicated from update_user_backend. if UserProfile.ROLE_REALM_OWNER in [role, bot.role] and not user_profile.is_realm_owner: raise OrganizationOwnerRequiredError elif not user_profile.is_realm_admin: raise OrganizationAdministratorRequiredError do_change_user_role(bot, role, acting_user=user_profile) if bot_owner_id is not None: try: owner = get_user_profile_by_id_in_realm(bot_owner_id, user_profile.realm) except UserProfile.DoesNotExist: raise JsonableError(_("Failed to change owner, no such user")) if not owner.is_active: raise JsonableError(_("Failed to change owner, user is deactivated")) if owner.is_bot: raise JsonableError(_("Failed to change owner, bots can't own other bots")) previous_owner = bot.bot_owner if previous_owner != owner: do_change_bot_owner(bot, owner, user_profile) if default_sending_stream is not None: if default_sending_stream == "": stream: Optional[Stream] = None else: (stream, sub) = access_stream_by_name(user_profile, default_sending_stream) do_change_default_sending_stream(bot, stream, acting_user=user_profile) if default_events_register_stream is not None: if default_events_register_stream == "": stream = None else: (stream, sub) = access_stream_by_name(user_profile, default_events_register_stream) do_change_default_events_register_stream(bot, stream, acting_user=user_profile) if default_all_public_streams is not None: do_change_default_all_public_streams( bot, default_all_public_streams, acting_user=user_profile ) if service_payload_url is not None: check_valid_interface_type(service_interface) assert service_interface is not None do_update_outgoing_webhook_service(bot, service_interface, service_payload_url) if config_data is not None: do_update_bot_config_data(bot, config_data) if len(request.FILES) == 0: pass elif len(request.FILES) == 1: [user_file] = request.FILES.values() assert isinstance(user_file, UploadedFile) assert user_file.size is not None upload_avatar_image(user_file, user_profile, bot) avatar_source = UserProfile.AVATAR_FROM_USER do_change_avatar_fields(bot, avatar_source, acting_user=user_profile) else: raise JsonableError(_("You may only upload one file at a time")) json_result = dict( full_name=bot.full_name, avatar_url=avatar_url(bot), service_interface=service_interface, service_payload_url=service_payload_url, config_data=config_data, default_sending_stream=get_stream_name(bot.default_sending_stream), default_events_register_stream=get_stream_name(bot.default_events_register_stream), default_all_public_streams=bot.default_all_public_streams, ) # Don't include the bot owner in case it is not set. # Default bots have no owner. if bot.bot_owner is not None: json_result["bot_owner"] = bot.bot_owner.email return json_success(request, data=json_result) @require_member_or_admin @has_request_variables def regenerate_bot_api_key( request: HttpRequest, user_profile: UserProfile, bot_id: int ) -> HttpResponse: bot = access_bot_by_id(user_profile, bot_id) new_api_key = do_regenerate_api_key(bot, user_profile) json_result = dict( api_key=new_api_key, ) return json_success(request, data=json_result) @require_member_or_admin @has_request_variables def add_bot_backend( request: HttpRequest, user_profile: UserProfile, full_name_raw: str = REQ("full_name"), short_name_raw: str = REQ("short_name"), bot_type: int = REQ(json_validator=check_int, default=UserProfile.DEFAULT_BOT), payload_url: str = REQ(json_validator=check_url, default=""), service_name: Optional[str] = REQ(default=None), config_data: Mapping[str, str] = REQ( default={}, json_validator=check_dict(value_validator=check_string) ), interface_type: int = REQ(json_validator=check_int, default=Service.GENERIC), default_sending_stream_name: Optional[str] = REQ("default_sending_stream", default=None), default_events_register_stream_name: Optional[str] = REQ( "default_events_register_stream", default=None ), default_all_public_streams: Optional[bool] = REQ(json_validator=check_bool, default=None), ) -> HttpResponse: short_name = check_short_name(short_name_raw) if bot_type != UserProfile.INCOMING_WEBHOOK_BOT: service_name = service_name or short_name short_name += "-bot" full_name = check_full_name( full_name_raw=full_name_raw, user_profile=user_profile, realm=user_profile.realm ) try: email = Address(username=short_name, domain=user_profile.realm.get_bot_domain()).addr_spec except InvalidFakeEmailDomainError: raise JsonableError( _( "Can't create bots until FAKE_EMAIL_DOMAIN is correctly configured.\n" "Please contact your server administrator." ) ) except ValueError: raise JsonableError(_("Bad name or username")) form = CreateUserForm({"full_name": full_name, "email": email}) if bot_type == UserProfile.EMBEDDED_BOT: if not settings.EMBEDDED_BOTS_ENABLED: raise JsonableError(_("Embedded bots are not enabled.")) if service_name not in [bot.name for bot in EMBEDDED_BOTS]: raise JsonableError(_("Invalid embedded bot name.")) if not form.is_valid(): # nocoverage # coverage note: The similar block above covers the most # common situation where this might fail, but this case may be # still possible with an overly long username. raise JsonableError(_("Bad name or username")) try: get_user_by_delivery_email(email, user_profile.realm) raise JsonableError(_("Username already in use")) except UserProfile.DoesNotExist: pass check_bot_name_available( realm_id=user_profile.realm_id, full_name=full_name, is_activation=False, ) check_bot_creation_policy(user_profile, bot_type) check_valid_bot_type(user_profile, bot_type) check_valid_interface_type(interface_type) if len(request.FILES) == 0: avatar_source = UserProfile.AVATAR_FROM_GRAVATAR elif len(request.FILES) != 1: raise JsonableError(_("You may only upload one file at a time")) else: avatar_source = UserProfile.AVATAR_FROM_USER default_sending_stream = None if default_sending_stream_name is not None: (default_sending_stream, ignored_sub) = access_stream_by_name( user_profile, default_sending_stream_name ) default_events_register_stream = None if default_events_register_stream_name is not None: (default_events_register_stream, ignored_sub) = access_stream_by_name( user_profile, default_events_register_stream_name ) if bot_type in (UserProfile.INCOMING_WEBHOOK_BOT, UserProfile.EMBEDDED_BOT) and service_name: check_valid_bot_config(bot_type, service_name, config_data) bot_profile = do_create_user( email=email, password=None, realm=user_profile.realm, full_name=full_name, bot_type=bot_type, bot_owner=user_profile, avatar_source=avatar_source, default_sending_stream=default_sending_stream, default_events_register_stream=default_events_register_stream, default_all_public_streams=default_all_public_streams, acting_user=user_profile, ) if len(request.FILES) == 1: [user_file] = request.FILES.values() assert isinstance(user_file, UploadedFile) assert user_file.size is not None upload_avatar_image(user_file, user_profile, bot_profile) if bot_type in (UserProfile.OUTGOING_WEBHOOK_BOT, UserProfile.EMBEDDED_BOT): assert isinstance(service_name, str) add_service( name=service_name, user_profile=bot_profile, base_url=payload_url, interface=interface_type, token=generate_api_key(), ) if bot_type == UserProfile.INCOMING_WEBHOOK_BOT and service_name: set_bot_config(bot_profile, "integration_id", service_name) if bot_type in (UserProfile.INCOMING_WEBHOOK_BOT, UserProfile.EMBEDDED_BOT): for key, value in config_data.items(): set_bot_config(bot_profile, key, value) notify_created_bot(bot_profile) api_key = get_api_key(bot_profile) json_result = dict( user_id=bot_profile.id, api_key=api_key, avatar_url=avatar_url(bot_profile), default_sending_stream=get_stream_name(bot_profile.default_sending_stream), default_events_register_stream=get_stream_name(bot_profile.default_events_register_stream), default_all_public_streams=bot_profile.default_all_public_streams, ) return json_success(request, data=json_result) @require_member_or_admin def get_bots_backend(request: HttpRequest, user_profile: UserProfile) -> HttpResponse: bot_profiles = UserProfile.objects.filter(is_bot=True, is_active=True, bot_owner=user_profile) bot_profiles = bot_profiles.select_related( "default_sending_stream", "default_events_register_stream" ) bot_profiles = bot_profiles.order_by("date_joined") def bot_info(bot_profile: UserProfile) -> Dict[str, Any]: default_sending_stream = get_stream_name(bot_profile.default_sending_stream) default_events_register_stream = get_stream_name(bot_profile.default_events_register_stream) # Bots are supposed to have only one API key, at least for now. # Therefore we can safely assume that one and only valid API key will be # the first one. api_key = get_api_key(bot_profile) return dict( username=bot_profile.email, full_name=bot_profile.full_name, api_key=api_key, avatar_url=avatar_url(bot_profile), default_sending_stream=default_sending_stream, default_events_register_stream=default_events_register_stream, default_all_public_streams=bot_profile.default_all_public_streams, ) return json_success(request, data={"bots": list(map(bot_info, bot_profiles))}) def get_user_data( user_profile: UserProfile, include_custom_profile_fields: bool, client_gravatar: bool, target_user: Optional[UserProfile] = None, ) -> Dict[str, Any]: """ The client_gravatar field here is set to True by default assuming that clients can compute their own gravatars, which saves bandwidth. This is more important of an optimization than it might seem because gravatar URLs contain MD5 hashes that compress very poorly compared to other data. """ realm = user_profile.realm members = get_users_for_api( realm, user_profile, target_user=target_user, client_gravatar=client_gravatar, user_avatar_url_field_optional=False, include_custom_profile_fields=include_custom_profile_fields, ) if target_user is not None: data: Dict[str, Any] = {"user": members[target_user.id]} else: data = {"members": [members[k] for k in members]} return data @has_request_variables def get_members_backend( request: HttpRequest, user_profile: UserProfile, user_id: Optional[int] = None, include_custom_profile_fields: bool = REQ(json_validator=check_bool, default=False), client_gravatar: bool = REQ(json_validator=check_bool, default=True), ) -> HttpResponse: target_user = None if user_id is not None: target_user = access_user_by_id( user_profile, user_id, allow_deactivated=True, allow_bots=True, for_admin=False ) data = get_user_data(user_profile, include_custom_profile_fields, client_gravatar, target_user) return json_success(request, data) @require_realm_admin @has_request_variables def create_user_backend( request: HttpRequest, user_profile: UserProfile, email: str = REQ(), password: str = REQ(), full_name_raw: str = REQ("full_name"), ) -> HttpResponse: if not user_profile.can_create_users: raise JsonableError(_("User not authorized to create users")) full_name = check_full_name( full_name_raw=full_name_raw, user_profile=user_profile, realm=user_profile.realm ) form = CreateUserForm({"full_name": full_name, "email": email}) if not form.is_valid(): raise JsonableError(_("Bad name or username")) # Check that the new user's email address belongs to the admin's realm # (Since this is an admin API, we don't require the user to have been # invited first.) realm = user_profile.realm try: email_allowed_for_realm(email, user_profile.realm) except DomainNotAllowedForRealmError: raise JsonableError( _("Email '{email}' not allowed in this organization").format( email=email, ) ) except DisposableEmailError: raise JsonableError(_("Disposable email addresses are not allowed in this organization")) except EmailContainsPlusError: raise JsonableError(_("Email addresses containing + are not allowed.")) try: get_user_by_delivery_email(email, user_profile.realm) raise JsonableError(_("Email '{email}' already in use").format(email=email)) except UserProfile.DoesNotExist: pass if not check_password_strength(password): raise JsonableError(str(PASSWORD_TOO_WEAK_ERROR)) target_user = do_create_user( email, password, realm, full_name, # Explicitly set tos_version=-1. This means that users # created via this mechanism would be prompted to set # the email_address_visibility setting on first login. # For servers that have configured Terms of Service, # users will also be prompted to accept the Terms of # Service on first login. tos_version=UserProfile.TOS_VERSION_BEFORE_FIRST_LOGIN, acting_user=user_profile, ) return json_success(request, data={"user_id": target_user.id}) def get_profile_backend(request: HttpRequest, user_profile: UserProfile) -> HttpResponse: raw_user_data = get_users_for_api( user_profile.realm, user_profile, target_user=user_profile, client_gravatar=False, user_avatar_url_field_optional=False, ) result: APIUserDict = raw_user_data[user_profile.id] result["max_message_id"] = max_message_id_for_user(user_profile) return json_success(request, data=result) @has_request_variables def get_subscription_backend( request: HttpRequest, user_profile: UserProfile, user_id: int = REQ(json_validator=check_int, path_only=True), stream_id: int = REQ(json_validator=check_int, path_only=True), ) -> HttpResponse: target_user = access_user_by_id(user_profile, user_id, for_admin=False) (stream, sub) = access_stream_by_id(user_profile, stream_id, allow_realm_admin=True) subscription_status = {"is_subscribed": subscribed_to_stream(target_user, stream_id)} return json_success(request, data=subscription_status) @has_request_variables def get_user_by_email( request: HttpRequest, user_profile: UserProfile, email: str, include_custom_profile_fields: bool = REQ(json_validator=check_bool, default=False), client_gravatar: bool = REQ(json_validator=check_bool, default=True), ) -> HttpResponse: target_user = access_user_by_email( user_profile, email, allow_deactivated=True, allow_bots=True, for_admin=False ) data = get_user_data(user_profile, include_custom_profile_fields, client_gravatar, target_user) return json_success(request, data)