Telethon/telethon/sessions/memory.py

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from enum import Enum
from .abstract import Session
from .. import utils
from ..tl import TLObject
from ..tl.types import (
PeerUser, PeerChat, PeerChannel,
InputPeerUser, InputPeerChat, InputPeerChannel,
InputPhoto, InputDocument
)
class _SentFileType(Enum):
DOCUMENT = 0
PHOTO = 1
@staticmethod
def from_type(cls):
if cls == InputDocument:
return _SentFileType.DOCUMENT
elif cls == InputPhoto:
return _SentFileType.PHOTO
else:
raise ValueError('The cls must be either InputDocument/InputPhoto')
class MemorySession(Session):
def __init__(self):
super().__init__()
self._dc_id = 0
self._server_address = None
self._port = None
self._auth_key = None
self._files = {}
self._entities = set()
self._update_states = {}
def set_dc(self, dc_id, server_address, port):
self._dc_id = dc_id or 0
self._server_address = server_address
self._port = port
@property
def dc_id(self):
return self._dc_id
@property
def server_address(self):
return self._server_address
@property
def port(self):
return self._port
@property
def auth_key(self):
return self._auth_key
@auth_key.setter
def auth_key(self, value):
self._auth_key = value
def get_update_state(self, entity_id):
return self._update_states.get(entity_id, None)
def set_update_state(self, entity_id, state):
self._update_states[entity_id] = state
def close(self):
pass
def save(self):
pass
def delete(self):
pass
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def _entity_values_to_row(self, id, hash, username, phone, name):
# While this is a simple implementation it might be overrode by,
# other classes so they don't need to implement the plural form
# of the method. Don't remove.
return id, hash, username, phone, name
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def _entity_to_row(self, e):
if not isinstance(e, TLObject):
return
try:
p = utils.get_input_peer(e, allow_self=False)
marked_id = utils.get_peer_id(p)
except TypeError:
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return
if isinstance(p, (InputPeerUser, InputPeerChannel)):
if not p.access_hash:
# Some users and channels seem to be returned without
# an 'access_hash', meaning Telegram doesn't want you
# to access them. This is the reason behind ensuring
# that the 'access_hash' is non-zero. See issue #354.
# Note that this checks for zero or None, see #392.
return
else:
p_hash = p.access_hash
elif isinstance(p, InputPeerChat):
p_hash = 0
else:
return
username = getattr(e, 'username', None) or None
if username is not None:
username = username.lower()
phone = getattr(e, 'phone', None)
name = utils.get_display_name(e) or None
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return self._entity_values_to_row(
marked_id, p_hash, username, phone, name
)
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def _entities_to_rows(self, tlo):
if not isinstance(tlo, TLObject) and utils.is_list_like(tlo):
# This may be a list of users already for instance
entities = tlo
else:
entities = []
if hasattr(tlo, 'chats') and utils.is_list_like(tlo.chats):
entities.extend(tlo.chats)
if hasattr(tlo, 'users') and utils.is_list_like(tlo.users):
entities.extend(tlo.users)
rows = [] # Rows to add (id, hash, username, phone, name)
for e in entities:
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row = self._entity_to_row(e)
if row:
rows.append(row)
return rows
def process_entities(self, tlo):
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self._entities |= set(self._entities_to_rows(tlo))
def get_entity_rows_by_phone(self, phone):
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try:
return next((id, hash) for id, hash, _, found_phone, _
in self._entities if found_phone == phone)
except StopIteration:
pass
def get_entity_rows_by_username(self, username):
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try:
return next((id, hash) for id, hash, found_username, _, _
in self._entities if found_username == username)
except StopIteration:
pass
def get_entity_rows_by_name(self, name):
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try:
return next((id, hash) for id, hash, _, _, found_name
in self._entities if found_name == name)
except StopIteration:
pass
def get_entity_rows_by_id(self, id, exact=True):
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try:
if exact:
return next((id, hash) for found_id, hash, _, _, _
in self._entities if found_id == id)
else:
ids = (
utils.get_peer_id(PeerUser(id)),
utils.get_peer_id(PeerChat(id)),
utils.get_peer_id(PeerChannel(id))
)
return next((id, hash) for found_id, hash, _, _, _
in self._entities if found_id in ids)
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except StopIteration:
pass
def get_input_entity(self, key):
try:
if key.SUBCLASS_OF_ID in (0xc91c90b6, 0xe669bf46, 0x40f202fd):
# hex(crc32(b'InputPeer', b'InputUser' and b'InputChannel'))
# We already have an Input version, so nothing else required
return key
# Try to early return if this key can be casted as input peer
return utils.get_input_peer(key)
except (AttributeError, TypeError):
# Not a TLObject or can't be cast into InputPeer
if isinstance(key, TLObject):
key = utils.get_peer_id(key)
exact = True
else:
exact = not isinstance(key, int) or key < 0
result = None
if isinstance(key, str):
phone = utils.parse_phone(key)
if phone:
result = self.get_entity_rows_by_phone(phone)
else:
username, _ = utils.parse_username(key)
if username:
result = self.get_entity_rows_by_username(username)
elif isinstance(key, int):
result = self.get_entity_rows_by_id(key, exact)
if not result and isinstance(key, str):
result = self.get_entity_rows_by_name(key)
if result:
entity_id, entity_hash = result # unpack resulting tuple
entity_id, kind = utils.resolve_id(entity_id)
# removes the mark and returns type of entity
if kind == PeerUser:
return InputPeerUser(entity_id, entity_hash)
elif kind == PeerChat:
return InputPeerChat(entity_id)
elif kind == PeerChannel:
return InputPeerChannel(entity_id, entity_hash)
else:
raise ValueError('Could not find input entity with key ', key)
def cache_file(self, md5_digest, file_size, instance):
if not isinstance(instance, (InputDocument, InputPhoto)):
raise TypeError('Cannot cache %s instance' % type(instance))
key = (md5_digest, file_size, _SentFileType.from_type(instance))
value = (instance.id, instance.access_hash)
self._files[key] = value
def get_file(self, md5_digest, file_size, cls):
key = (md5_digest, file_size, _SentFileType.from_type(cls))
try:
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return cls(self._files[key])
except KeyError:
return None