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Separate user methods from the base client

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This commit is contained in:
Lonami Exo 2018-06-09 21:22:54 +02:00
parent 4b147f0153
commit bb9b9796e0
5 changed files with 324 additions and 300 deletions
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3
telethon/__init__.py
View File

@ -1,6 +1,5 @@
import logging import logging
from .telegram_bare_client import TelegramBareClient from .client.telegramclient import TelegramClient
from .telegram_client import TelegramClient
from .network import connection from .network import connection
from . import tl, version from . import tl, version

11
telethon/client/__init__.py
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@ -0,0 +1,11 @@
"""
This package defines clients as subclasses of others, and then a single
`telethon.client.telegramclient.TelegramClient` which is subclass of them
all to provide the final unified interface while the methods can live in
different subclasses to be more maintainable.
The ABC is `telethon.client.telegrambaseclient.TelegramBaseClient` and the
first implementor is `telethon.client.users.UserMethods`, since calling
requests require them to be resolved first, and that requires accessing
entities (users).
"""

292
telethon/client/telegrambaseclient.py
View File

@ -1,3 +1,4 @@
import abc
import asyncio import asyncio
import itertools import itertools
import logging import logging
@ -5,15 +6,15 @@ import platform
import warnings import warnings
from datetime import timedelta, datetime from datetime import timedelta, datetime
from . import version, errors, utils from .. import version, errors, utils
from .crypto import rsa from ..crypto import rsa
from .extensions import markdown from ..extensions import markdown
from .network import MTProtoSender, ConnectionTcpFull from ..network import MTProtoSender, ConnectionTcpFull
from .network.mtprotostate import MTProtoState from ..network.mtprotostate import MTProtoState
from .sessions import Session, SQLiteSession from ..sessions import Session, SQLiteSession
from .tl import TLObject, types, functions from ..tl import TLObject, types, functions
from .tl.all_tlobjects import LAYER from ..tl.all_tlobjects import LAYER
from .update_state import UpdateState from ..update_state import UpdateState
DEFAULT_DC_ID = 4 DEFAULT_DC_ID = 4
DEFAULT_IPV4_IP = '149.154.167.51' DEFAULT_IPV4_IP = '149.154.167.51'
@ -23,10 +24,11 @@ DEFAULT_PORT = 443
__log__ = logging.getLogger(__name__) __log__ = logging.getLogger(__name__)
class TelegramBareClient: class TelegramBaseClient(abc.ABC):
""" """
A bare Telegram client that somewhat eases the usage of the This is the abstract base class for the client. It defines some
``MTProtoSender``. basic stuff like connecting, switching data center, etc, and
leaves the `__call__` unimplemented.
Args: Args:
session (`str` | `telethon.sessions.abstract.Session`, `None`): session (`str` | `telethon.sessions.abstract.Session`, `None`):
@ -260,8 +262,8 @@ class TelegramBareClient:
async def _get_dc(self, dc_id, cdn=False): async def _get_dc(self, dc_id, cdn=False):
"""Gets the Data Center (DC) associated to 'dc_id'""" """Gets the Data Center (DC) associated to 'dc_id'"""
if not TelegramBareClient._config: if not TelegramBaseClient._config:
TelegramBareClient._config =\ TelegramBaseClient._config =\
await self(functions.help.GetConfigRequest()) await self(functions.help.GetConfigRequest())
try: try:
@ -272,7 +274,7 @@ class TelegramBareClient:
rsa.add_key(pk.public_key) rsa.add_key(pk.public_key)
return next( return next(
dc for dc in TelegramBareClient._config.dc_options dc for dc in TelegramBaseClient._config.dc_options
if dc.id == dc_id if dc.id == dc_id
and bool(dc.ipv6) == self._use_ipv6 and bool(dc.cdn) == cdn and bool(dc.ipv6) == self._use_ipv6 and bool(dc.cdn) == cdn
) )
@ -281,7 +283,7 @@ class TelegramBareClient:
raise raise
# New configuration, perhaps a new CDN was added? # New configuration, perhaps a new CDN was added?
TelegramBareClient._config =\ TelegramBaseClient._config =\
await self(functions.help.GetConfigRequest()) await self(functions.help.GetConfigRequest())
return self._get_dc(dc_id, cdn=cdn) return self._get_dc(dc_id, cdn=cdn)
@ -369,7 +371,8 @@ class TelegramBareClient:
# region Invoking Telegram requests # region Invoking Telegram requests
async def __call__(self, request, retries=5, ordered=False): @abc.abstractmethod
def __call__(self, request, retries=5, ordered=False):
""" """
Invokes (sends) one or more MTProtoRequests and returns (receives) Invokes (sends) one or more MTProtoRequests and returns (receives)
their result. their result.
@ -387,36 +390,7 @@ class TelegramBareClient:
The result of the request (often a `TLObject`) or a list of The result of the request (often a `TLObject`) or a list of
results if more than one request was given. results if more than one request was given.
""" """
requests = (request,) if not utils.is_list_like(request) else request raise NotImplementedError
if not all(isinstance(x, TLObject) and
x.content_related for x in requests):
raise TypeError('You can only invoke requests, not types!')
for r in requests:
await r.resolve(self, utils)
for _ in range(retries):
try:
future = self._sender.send(request, ordered=ordered)
if isinstance(future, list):
results = []
for f in future:
results.append(await f)
return results
else:
return await future
except (errors.ServerError, errors.RpcCallFailError):
pass
except (errors.FloodWaitError, errors.FloodTestPhoneWaitError) as e:
if e.seconds <= self.session.flood_sleep_threshold:
await asyncio.sleep(e.seconds)
else:
raise
except (errors.PhoneMigrateError, errors.NetworkMigrateError,
errors.UserMigrateError) as e:
await self._switch_dc(e.new_dc)
raise ValueError('Number of retries reached 0')
# Let people use client.invoke(SomeRequest()) instead client(...) # Let people use client.invoke(SomeRequest()) instead client(...)
async def invoke(self, *args, **kwargs): async def invoke(self, *args, **kwargs):
@ -425,227 +399,3 @@ class TelegramBareClient:
return await self(*args, **kwargs) return await self(*args, **kwargs)
# endregion # endregion
# region Minimal helpers
async def get_me(self, input_peer=False):
"""
Gets "me" (the self user) which is currently authenticated,
or None if the request fails (hence, not authenticated).
Args:
input_peer (`bool`, optional):
Whether to return the :tl:`InputPeerUser` version or the normal
:tl:`User`. This can be useful if you just need to know the ID
of yourself.
Returns:
Your own :tl:`User`.
"""
if input_peer and self._self_input_peer:
return self._self_input_peer
try:
me = (await self(
functions.users.GetUsersRequest([types.InputUserSelf()])))[0]
if not self._self_input_peer:
self._self_input_peer = utils.get_input_peer(
me, allow_self=False
)
return self._self_input_peer if input_peer else me
except errors.UnauthorizedError:
return None
async def get_entity(self, entity):
"""
Turns the given entity into a valid Telegram user or chat.
entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
The entity (or iterable of entities) to be transformed.
If it's a string which can be converted to an integer or starts
with '+' it will be resolved as if it were a phone number.
If it doesn't start with '+' or starts with a '@' it will be
be resolved from the username. If no exact match is returned,
an error will be raised.
If the entity is an integer or a Peer, its information will be
returned through a call to self.get_input_peer(entity).
If the entity is neither, and it's not a TLObject, an
error will be raised.
Returns:
:tl:`User`, :tl:`Chat` or :tl:`Channel` corresponding to the
input entity. A list will be returned if more than one was given.
"""
single = not utils.is_list_like(entity)
if single:
entity = (entity,)
# Group input entities by string (resolve username),
# input users (get users), input chat (get chats) and
# input channels (get channels) to get the most entities
# in the less amount of calls possible.
inputs = [
x if isinstance(x, str) else await self.get_input_entity(x)
for x in entity
]
users = [x for x in inputs
if isinstance(x, (types.InputPeerUser, types.InputPeerSelf))]
chats = [x.chat_id for x in inputs
if isinstance(x, types.InputPeerChat)]
channels = [x for x in inputs
if isinstance(x, types.InputPeerChannel)]
if users:
# GetUsersRequest has a limit of 200 per call
tmp = []
while users:
curr, users = users[:200], users[200:]
tmp.extend(await self(functions.users.GetUsersRequest(curr)))
users = tmp
if chats: # TODO Handle chats slice?
chats = (await self(
functions.messages.GetChatsRequest(chats))).chats
if channels:
channels = (await self(
functions.channels.GetChannelsRequest(channels))).chats
# Merge users, chats and channels into a single dictionary
id_entity = {
utils.get_peer_id(x): x
for x in itertools.chain(users, chats, channels)
}
# We could check saved usernames and put them into the users,
# chats and channels list from before. While this would reduce
# the amount of ResolveUsername calls, it would fail to catch
# username changes.
result = [
await self._get_entity_from_string(x) if isinstance(x, str)
else (
id_entity[utils.get_peer_id(x)]
if not isinstance(x, types.InputPeerSelf)
else next(u for u in id_entity.values()
if isinstance(u, types.User) and u.is_self)
)
for x in inputs
]
return result[0] if single else result
async def get_input_entity(self, peer):
"""
Turns the given peer into its input entity version. Most requests
use this kind of InputUser, InputChat and so on, so this is the
most suitable call to make for those cases.
entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
The integer ID of an user or otherwise either of a
:tl:`PeerUser`, :tl:`PeerChat` or :tl:`PeerChannel`, for
which to get its ``Input*`` version.
If this ``Peer`` hasn't been seen before by the library, the top
dialogs will be loaded and their entities saved to the session
file (unless this feature was disabled explicitly).
If in the end the access hash required for the peer was not found,
a ValueError will be raised.
Returns:
:tl:`InputPeerUser`, :tl:`InputPeerChat` or :tl:`InputPeerChannel`
or :tl:`InputPeerSelf` if the parameter is ``'me'`` or ``'self'``.
If you need to get the ID of yourself, you should use
`get_me` with ``input_peer=True``) instead.
"""
if peer in ('me', 'self'):
return types.InputPeerSelf()
try:
# First try to get the entity from cache, otherwise figure it out
return self.session.get_input_entity(peer)
except ValueError:
pass
if isinstance(peer, str):
return utils.get_input_peer(
await self._get_entity_from_string(peer))
if not isinstance(peer, int) and (not isinstance(peer, TLObject)
or peer.SUBCLASS_OF_ID != 0x2d45687):
# Try casting the object into an input peer. Might TypeError.
# Don't do it if a not-found ID was given (instead ValueError).
# Also ignore Peer (0x2d45687 == crc32(b'Peer'))'s, lacking hash.
return utils.get_input_peer(peer)
raise ValueError(
'Could not find the input entity for "{}". Please read https://'
'telethon.readthedocs.io/en/latest/extra/basic/entities.html to'
' find out more details.'
.format(peer)
)
# endregion
# region Private methods
async def _get_entity_from_string(self, string):
"""
Gets a full entity from the given string, which may be a phone or
an username, and processes all the found entities on the session.
The string may also be a user link, or a channel/chat invite link.
This method has the side effect of adding the found users to the
session database, so it can be queried later without API calls,
if this option is enabled on the session.
Returns the found entity, or raises TypeError if not found.
"""
phone = utils.parse_phone(string)
if phone:
for user in (await self(
functions.contacts.GetContactsRequest(0))).users:
if user.phone == phone:
return user
else:
username, is_join_chat = utils.parse_username(string)
if is_join_chat:
invite = await self(
functions.messages.CheckChatInviteRequest(username))
if isinstance(invite, types.ChatInvite):
raise ValueError(
'Cannot get entity from a channel (or group) '
'that you are not part of. Join the group and retry'
)
elif isinstance(invite, types.ChatInviteAlready):
return invite.chat
elif username:
if username in ('me', 'self'):
return await self.get_me()
try:
result = await self(
functions.contacts.ResolveUsernameRequest(username))
except errors.UsernameNotOccupiedError as e:
raise ValueError('No user has "{}" as username'
.format(username)) from e
for entity in itertools.chain(result.users, result.chats):
if getattr(entity, 'username', None) or '' \
.lower() == username:
return entity
try:
# Nobody with this username, maybe it's an exact name/title
return await self.get_entity(
self.session.get_input_entity(string))
except ValueError:
pass
raise ValueError(
'Cannot find any entity corresponding to "{}"'.format(string)
)
# endregion

54
telethon/client/telegramclient.py
View File

@ -11,17 +11,17 @@ from collections import UserList
from io import BytesIO from io import BytesIO
from mimetypes import guess_type from mimetypes import guess_type
from .crypto import CdnDecrypter from ..crypto import CdnDecrypter
from .tl.custom import InputSizedFile from ..tl.custom import InputSizedFile
from .tl.functions.help import AcceptTermsOfServiceRequest from ..tl.functions.help import AcceptTermsOfServiceRequest
from .tl.functions.updates import GetDifferenceRequest from ..tl.functions.updates import GetDifferenceRequest
from .tl.functions.upload import ( from ..tl.functions.upload import (
SaveBigFilePartRequest, SaveFilePartRequest, GetFileRequest SaveBigFilePartRequest, SaveFilePartRequest, GetFileRequest
) )
from .tl.types.updates import ( from ..tl.types.updates import (
DifferenceSlice, DifferenceEmpty, Difference, DifferenceTooLong DifferenceSlice, DifferenceEmpty, Difference, DifferenceTooLong
) )
from .tl.types.upload import FileCdnRedirect from ..tl.types.upload import FileCdnRedirect
try: try:
import socks import socks
@ -35,23 +35,23 @@ try:
except ImportError: except ImportError:
hachoir = None hachoir = None
from . import TelegramBareClient from .telegrambaseclient import TelegramBaseClient
from . import helpers, events from .. import helpers, events
from .errors import ( from ..errors import (
PhoneCodeEmptyError, PhoneCodeExpiredError, PhoneCodeEmptyError, PhoneCodeExpiredError,
PhoneCodeHashEmptyError, PhoneCodeInvalidError, LocationInvalidError, PhoneCodeHashEmptyError, PhoneCodeInvalidError, LocationInvalidError,
SessionPasswordNeededError, FileMigrateError, PhoneNumberUnoccupiedError, SessionPasswordNeededError, FileMigrateError, PhoneNumberUnoccupiedError,
PhoneNumberOccupiedError PhoneNumberOccupiedError
) )
from .tl.custom import Draft, Dialog from ..tl.custom import Draft, Dialog
from .tl.functions.account import ( from ..tl.functions.account import (
GetPasswordRequest, UpdatePasswordSettingsRequest GetPasswordRequest, UpdatePasswordSettingsRequest
) )
from .tl.functions.auth import ( from ..tl.functions.auth import (
CheckPasswordRequest, LogOutRequest, SendCodeRequest, SignInRequest, CheckPasswordRequest, LogOutRequest, SendCodeRequest, SignInRequest,
SignUpRequest, ResendCodeRequest, ImportBotAuthorizationRequest SignUpRequest, ResendCodeRequest, ImportBotAuthorizationRequest
) )
from .tl.functions.messages import ( from ..tl.functions.messages import (
GetDialogsRequest, GetHistoryRequest, SendMediaRequest, GetDialogsRequest, GetHistoryRequest, SendMediaRequest,
SendMessageRequest, GetAllDraftsRequest, SendMessageRequest, GetAllDraftsRequest,
ReadMentionsRequest, SendMultiMediaRequest, ReadMentionsRequest, SendMultiMediaRequest,
@ -59,13 +59,13 @@ from .tl.functions.messages import (
ForwardMessagesRequest, SearchRequest ForwardMessagesRequest, SearchRequest
) )
from .tl.functions import channels from ..tl.functions import channels
from .tl.functions import messages from ..tl.functions import messages
from .tl.functions.channels import ( from ..tl.functions.channels import (
GetFullChannelRequest, GetParticipantsRequest GetFullChannelRequest, GetParticipantsRequest
) )
from .tl.types import ( from ..tl.types import (
DocumentAttributeAudio, DocumentAttributeFilename, DocumentAttributeAudio, DocumentAttributeFilename,
InputMediaUploadedDocument, InputMediaUploadedPhoto, InputPeerEmpty, InputMediaUploadedDocument, InputMediaUploadedPhoto, InputPeerEmpty,
Message, MessageMediaContact, MessageMediaDocument, MessageMediaPhoto, Message, MessageMediaContact, MessageMediaDocument, MessageMediaPhoto,
@ -81,21 +81,21 @@ from .tl.types import (
ChannelParticipantsBanned, ChannelParticipantsKicked, ChannelParticipantsBanned, ChannelParticipantsKicked,
InputMessagesFilterEmpty, UpdatesCombined InputMessagesFilterEmpty, UpdatesCombined
) )
from .tl.types.messages import DialogsSlice, MessagesNotModified from ..tl.types.messages import DialogsSlice, MessagesNotModified
from .tl.types.account import PasswordInputSettings, NoPassword from ..tl.types.account import PasswordInputSettings, NoPassword
from .tl import custom from ..tl import custom
from .utils import Default from ..utils import Default
from .extensions import markdown, html from ..extensions import markdown, html
__log__ = logging.getLogger(__name__) __log__ = logging.getLogger(__name__)
import os import os
from datetime import datetime from datetime import datetime
from . import utils from .. import utils
from .errors import RPCError from ..errors import RPCError
from .tl import TLObject from ..tl import TLObject
class TelegramClient(TelegramBareClient): class TelegramClient(TelegramBaseClient):
""" """
Initializes the Telegram client with the specified API ID and Hash. This Initializes the Telegram client with the specified API ID and Hash. This
is identical to the `telethon.telegram_bare_client.TelegramBareClient` is identical to the `telethon.telegram_bare_client.TelegramBareClient`

264
telethon/client/users.py Normal file
View File

@ -0,0 +1,264 @@
import asyncio
import itertools
from .telegrambaseclient import TelegramBaseClient
from .. import errors, utils
from ..tl import TLObject, types, functions
class UserMethods(TelegramBaseClient):
async def __call__(self, request, retries=5, ordered=False):
requests = (request,) if not utils.is_list_like(request) else request
if not all(isinstance(x, TLObject) and
x.content_related for x in requests):
raise TypeError('You can only invoke requests, not types!')
for r in requests:
await r.resolve(self, utils)
for _ in range(retries):
try:
future = self._sender.send(request, ordered=ordered)
if isinstance(future, list):
results = []
for f in future:
results.append(await f)
return results
else:
return await future
except (errors.ServerError, errors.RpcCallFailError):
pass
except (errors.FloodWaitError, errors.FloodTestPhoneWaitError) as e:
if e.seconds <= self.session.flood_sleep_threshold:
await asyncio.sleep(e.seconds)
else:
raise
except (errors.PhoneMigrateError, errors.NetworkMigrateError,
errors.UserMigrateError) as e:
await self._switch_dc(e.new_dc)
raise ValueError('Number of retries reached 0')
# region Public methods
async def get_me(self, input_peer=False):
"""
Gets "me" (the self user) which is currently authenticated,
or None if the request fails (hence, not authenticated).
Args:
input_peer (`bool`, optional):
Whether to return the :tl:`InputPeerUser` version or the normal
:tl:`User`. This can be useful if you just need to know the ID
of yourself.
Returns:
Your own :tl:`User`.
"""
if input_peer and self._self_input_peer:
return self._self_input_peer
try:
me = (await self(
functions.users.GetUsersRequest([types.InputUserSelf()])))[0]
if not self._self_input_peer:
self._self_input_peer = utils.get_input_peer(
me, allow_self=False
)
return self._self_input_peer if input_peer else me
except errors.UnauthorizedError:
return None
async def get_entity(self, entity):
"""
Turns the given entity into a valid Telegram user or chat.
entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
The entity (or iterable of entities) to be transformed.
If it's a string which can be converted to an integer or starts
with '+' it will be resolved as if it were a phone number.
If it doesn't start with '+' or starts with a '@' it will be
be resolved from the username. If no exact match is returned,
an error will be raised.
If the entity is an integer or a Peer, its information will be
returned through a call to self.get_input_peer(entity).
If the entity is neither, and it's not a TLObject, an
error will be raised.
Returns:
:tl:`User`, :tl:`Chat` or :tl:`Channel` corresponding to the
input entity. A list will be returned if more than one was given.
"""
single = not utils.is_list_like(entity)
if single:
entity = (entity,)
# Group input entities by string (resolve username),
# input users (get users), input chat (get chats) and
# input channels (get channels) to get the most entities
# in the less amount of calls possible.
inputs = [
x if isinstance(x, str) else await self.get_input_entity(x)
for x in entity
]
users = [x for x in inputs
if isinstance(x, (types.InputPeerUser, types.InputPeerSelf))]
chats = [x.chat_id for x in inputs
if isinstance(x, types.InputPeerChat)]
channels = [x for x in inputs
if isinstance(x, types.InputPeerChannel)]
if users:
# GetUsersRequest has a limit of 200 per call
tmp = []
while users:
curr, users = users[:200], users[200:]
tmp.extend(await self(functions.users.GetUsersRequest(curr)))
users = tmp
if chats: # TODO Handle chats slice?
chats = (await self(
functions.messages.GetChatsRequest(chats))).chats
if channels:
channels = (await self(
functions.channels.GetChannelsRequest(channels))).chats
# Merge users, chats and channels into a single dictionary
id_entity = {
utils.get_peer_id(x): x
for x in itertools.chain(users, chats, channels)
}
# We could check saved usernames and put them into the users,
# chats and channels list from before. While this would reduce
# the amount of ResolveUsername calls, it would fail to catch
# username changes.
result = [
await self._get_entity_from_string(x) if isinstance(x, str)
else (
id_entity[utils.get_peer_id(x)]
if not isinstance(x, types.InputPeerSelf)
else next(u for u in id_entity.values()
if isinstance(u, types.User) and u.is_self)
)
for x in inputs
]
return result[0] if single else result
async def get_input_entity(self, peer):
"""
Turns the given peer into its input entity version. Most requests
use this kind of InputUser, InputChat and so on, so this is the
most suitable call to make for those cases.
entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
The integer ID of an user or otherwise either of a
:tl:`PeerUser`, :tl:`PeerChat` or :tl:`PeerChannel`, for
which to get its ``Input*`` version.
If this ``Peer`` hasn't been seen before by the library, the top
dialogs will be loaded and their entities saved to the session
file (unless this feature was disabled explicitly).
If in the end the access hash required for the peer was not found,
a ValueError will be raised.
Returns:
:tl:`InputPeerUser`, :tl:`InputPeerChat` or :tl:`InputPeerChannel`
or :tl:`InputPeerSelf` if the parameter is ``'me'`` or ``'self'``.
If you need to get the ID of yourself, you should use
`get_me` with ``input_peer=True``) instead.
"""
if peer in ('me', 'self'):
return types.InputPeerSelf()
try:
# First try to get the entity from cache, otherwise figure it out
return self.session.get_input_entity(peer)
except ValueError:
pass
if isinstance(peer, str):
return utils.get_input_peer(
await self._get_entity_from_string(peer))
if not isinstance(peer, int) and (not isinstance(peer, TLObject)
or peer.SUBCLASS_OF_ID != 0x2d45687):
# Try casting the object into an input peer. Might TypeError.
# Don't do it if a not-found ID was given (instead ValueError).
# Also ignore Peer (0x2d45687 == crc32(b'Peer'))'s, lacking hash.
return utils.get_input_peer(peer)
raise ValueError(
'Could not find the input entity for "{}". Please read https://'
'telethon.readthedocs.io/en/latest/extra/basic/entities.html to'
' find out more details.'
.format(peer)
)
# endregion
# region Private methods
async def _get_entity_from_string(self, string):
"""
Gets a full entity from the given string, which may be a phone or
an username, and processes all the found entities on the session.
The string may also be a user link, or a channel/chat invite link.
This method has the side effect of adding the found users to the
session database, so it can be queried later without API calls,
if this option is enabled on the session.
Returns the found entity, or raises TypeError if not found.
"""
phone = utils.parse_phone(string)
if phone:
for user in (await self(
functions.contacts.GetContactsRequest(0))).users:
if user.phone == phone:
return user
else:
username, is_join_chat = utils.parse_username(string)
if is_join_chat:
invite = await self(
functions.messages.CheckChatInviteRequest(username))
if isinstance(invite, types.ChatInvite):
raise ValueError(
'Cannot get entity from a channel (or group) '
'that you are not part of. Join the group and retry'
)
elif isinstance(invite, types.ChatInviteAlready):
return invite.chat
elif username:
if username in ('me', 'self'):
return await self.get_me()
try:
result = await self(
functions.contacts.ResolveUsernameRequest(username))
except errors.UsernameNotOccupiedError as e:
raise ValueError('No user has "{}" as username'
.format(username)) from e
for entity in itertools.chain(result.users, result.chats):
if getattr(entity, 'username', None) or '' \
.lower() == username:
return entity
try:
# Nobody with this username, maybe it's an exact name/title
return await self.get_entity(
self.session.get_input_entity(string))
except ValueError:
pass
raise ValueError(
'Cannot find any entity corresponding to "{}"'.format(string)
)
# endregion