mirror of
https://github.com/LonamiWebs/Telethon.git
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90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
"""Utilities for working with TLObjects.
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We have these because some TLObjects differ in very little things,
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for example, some may have an `user_id` attribute and other a `chat_id` but,
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after all, both are the same attribute, IDs."""
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from mimetypes import guess_extension
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from telethon.tl.types import \
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User, Chat, Channel, \
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PeerUser, PeerChat, PeerChannel, \
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InputPeerUser, InputPeerChat, InputPeerChannel, \
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UserProfilePhoto, ChatPhoto, \
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MessageMediaPhoto, MessageMediaDocument
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def get_display_name(entity):
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"""Gets the input peer for the given "entity" (user, chat or channel)
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Returns None if it was not found"""
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if isinstance(entity, User):
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if entity.last_name is not None:
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return '{} {}'.format(entity.first_name, entity.last_name)
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return entity.first_name
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if isinstance(entity, Chat) or isinstance(entity, Channel):
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return entity.title
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def get_extension(media):
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"""Gets the corresponding extension for any Telegram media"""
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# Photos are always compressed as .jpg by Telegram
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if (isinstance(media, UserProfilePhoto) or
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isinstance(media, ChatPhoto) or
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isinstance(media, MessageMediaPhoto)):
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return '.jpg'
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# Documents will come with a mime type, from which we can guess their mime type
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if isinstance(media, MessageMediaDocument):
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extension = guess_extension(media.document.mime_type)
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return extension if extension else ''
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return None
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def get_input_peer(entity):
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"""Gets the input peer for the given "entity" (user, chat or channel).
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Returns None if it was not found"""
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if isinstance(entity, User):
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return InputPeerUser(entity.id, entity.access_hash)
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if isinstance(entity, Chat):
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return InputPeerChat(entity.id)
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if isinstance(entity, Channel):
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return InputPeerChannel(entity.id, entity.access_hash)
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def find_user_or_chat(peer, users, chats):
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"""Finds the corresponding user or chat given a peer.
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Returns None if it was not found"""
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try:
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if isinstance(peer, PeerUser):
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user = next(u for u in users if u.id == peer.user_id)
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return user
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elif isinstance(peer, PeerChat):
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chat = next(c for c in chats if c.id == peer.chat_id)
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return chat
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elif isinstance(peer, PeerChannel):
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channel = next(c for c in chats if c.id == peer.channel_id)
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return channel
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except StopIteration:
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return None
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def get_appropiate_part_size(file_size):
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"""Gets the appropiate part size when uploading or downloading files,
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given an initial file size"""
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if file_size <= 1048576: # 1MB
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return 32
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if file_size <= 10485760: # 10MB
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return 64
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if file_size <= 393216000: # 375MB
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return 128
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if file_size <= 786432000: # 750MB
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return 256
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if file_size <= 1572864000: # 1500MB
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return 512
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raise ValueError('File size too large')
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