mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-29 21:03:45 +03:00
84b016cf1c
Even though raw API is somewhat necessary at times, these methods should remain implementation details.
696 lines
26 KiB
Python
696 lines
26 KiB
Python
import builtins
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import functools
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import os
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import re
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import shutil
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import struct
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from collections import defaultdict
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from zlib import crc32
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from ..sourcebuilder import SourceBuilder
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from ..utils import snake_to_camel_case
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AUTO_GEN_NOTICE = \
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'"""File generated by TLObjects\' generator. All changes will be ERASED"""'
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AUTO_CASTS = {
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'InputPeer':
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'utils.get_input_peer(await client.get_input_entity({}))',
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'InputChannel':
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'utils.get_input_channel(await client.get_input_entity({}))',
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'InputUser':
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'utils.get_input_user(await client.get_input_entity({}))',
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'InputDialogPeer': 'await client._get_input_dialog({})',
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'InputNotifyPeer': 'await client._get_input_notify({})',
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'InputMedia': 'utils.get_input_media({})',
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'InputPhoto': 'utils.get_input_photo({})',
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'InputMessage': 'utils.get_input_message({})',
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'InputDocument': 'utils.get_input_document({})',
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'InputChatPhoto': 'utils.get_input_chat_photo({})',
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'InputGroupCall': 'utils.get_input_group_call({})',
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}
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NAMED_AUTO_CASTS = {
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('chat_id', 'int'): 'await client.get_peer_id({})'
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}
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# Secret chats have a chat_id which may be negative.
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# With the named auto-cast above, we would break it.
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# However there are plenty of other legit requests
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# with `chat_id:int` where it is useful.
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#
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# NOTE: This works because the auto-cast is not recursive.
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# There are plenty of types that would break if we
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# did recurse into them to resolve them.
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NAMED_BLACKLIST = {
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'messages.discardEncryption'
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}
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BASE_TYPES = ('string', 'bytes', 'int', 'long', 'int128',
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'int256', 'double', 'Bool', 'true', 'date')
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def _write_modules(
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out_dir, in_mod, kind, namespace_tlobjects, type_constructors, layer, all_tlobjects):
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# namespace_tlobjects: {'namespace', [TLObject]}
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out_dir.mkdir(parents=True, exist_ok=True)
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for ns, tlobjects in namespace_tlobjects.items():
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file = out_dir / '{}.py'.format(ns or '__init__')
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with file.open('w') as f, SourceBuilder(f) as builder:
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builder.writeln(AUTO_GEN_NOTICE)
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if kind == 'TLObject':
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builder.writeln('from .._misc.tlobject import TLObject, TLRequest')
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builder.writeln('from . import fn')
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else:
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builder.writeln('from ..._misc.tlobject import TLObject, TLRequest')
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builder.writeln('from typing import Optional, List, '
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'Union, TYPE_CHECKING')
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# Add the relative imports to the namespaces,
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# unless we already are in a namespace.
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if not ns:
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builder.writeln('from . import {}', ', '.join(sorted(
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x for x in namespace_tlobjects.keys() if x
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)))
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# Import 'os' for those needing access to 'os.urandom()'
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# Currently only 'random_id' needs 'os' to be imported,
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# for all those TLObjects with arg.can_be_inferred.
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builder.writeln('import os')
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# Import struct for the .__bytes__(self) serialization
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builder.writeln('import struct')
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# Import dataclasses in order to freeze the instances
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builder.writeln('import dataclasses')
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# Import datetime for type hinting
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builder.writeln('from datetime import datetime')
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tlobjects.sort(key=lambda x: x.name)
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type_names = set()
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type_defs = []
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# Find all the types in this file and generate type definitions
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# based on the types. The type definitions are written to the
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# file at the end.
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for t in tlobjects:
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if not t.is_function:
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type_name = t.result
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if '.' in type_name:
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type_name = type_name[type_name.rindex('.'):]
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if type_name in type_names:
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continue
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type_names.add(type_name)
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constructors = type_constructors[type_name]
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if not constructors:
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pass
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elif len(constructors) == 1:
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type_defs.append('Type{} = {}'.format(
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type_name, constructors[0].class_name))
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else:
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type_defs.append('Type{} = Union[{}]'.format(
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type_name, ','.join(c.class_name
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for c in constructors)))
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imports = {}
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primitives = {'int', 'long', 'int128', 'int256', 'double',
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'string', 'date', 'bytes', 'Bool', 'true'}
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# Find all the types in other files that are used in this file
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# and generate the information required to import those types.
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for t in tlobjects:
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for arg in t.args:
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name = arg.type
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if not name or name in primitives:
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continue
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if kind == 'TLObject':
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import_space = '.'
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else:
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import_space = '..'
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if '.' in name:
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namespace = name.split('.')[0]
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name = name.split('.')[1]
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import_space += '.{}'.format(namespace)
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if name not in type_names:
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type_names.add(name)
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if name == 'date':
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imports['datetime'] = ['datetime']
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continue
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elif import_space not in imports:
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imports[import_space] = set()
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imports[import_space].add('Type{}'.format(name))
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# Add imports required for type checking
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if imports:
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builder.writeln('if TYPE_CHECKING:')
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for namespace, names in imports.items():
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builder.writeln('from {} import {}',
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namespace, ', '.join(sorted(names)))
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builder.end_block()
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# Generate the class for every TLObject
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for t in tlobjects:
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_write_source_code(t, kind, builder, type_constructors)
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builder.current_indent = 0
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# Write the type definitions generated earlier.
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builder.writeln()
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for line in type_defs:
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builder.writeln(line)
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if not ns and kind == 'TLObject':
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_write_all_tlobjects(all_tlobjects, layer, builder)
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def _write_source_code(tlobject, kind, builder, type_constructors):
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"""
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Writes the source code corresponding to the given TLObject
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by making use of the ``builder`` `SourceBuilder`.
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Additional information such as file path depth and
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the ``Type: [Constructors]`` must be given for proper
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importing and documentation strings.
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"""
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_write_class_init(tlobject, kind, type_constructors, builder)
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_write_resolve(tlobject, builder)
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_write_to_bytes(tlobject, builder)
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_write_from_reader(tlobject, builder)
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_write_read_result(tlobject, builder)
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def _write_class_init(tlobject, kind, type_constructors, builder):
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builder.writeln()
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builder.writeln()
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builder.writeln('@dataclasses.dataclass(init=False, frozen=True)')
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builder.writeln('class {}({}):', tlobject.class_name, kind)
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builder.writeln('"""')
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if tlobject.is_function:
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builder.write(':returns {}: ', tlobject.result)
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else:
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builder.write('Constructor for {}: ', tlobject.result)
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constructors = type_constructors[tlobject.result]
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if not constructors:
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builder.writeln('This type has no constructors.')
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elif len(constructors) == 1:
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builder.writeln('Instance of {}.',
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constructors[0].class_name)
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else:
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builder.writeln('Instance of either {}.', ', '.join(
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c.class_name for c in constructors))
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builder.writeln('"""')
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# Define slots to help reduce the size of the objects a little bit.
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# It's also good for knowing what fields an object has.
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builder.write('__slots__ = (')
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sep = ''
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for arg in tlobject.real_args:
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builder.write('{}{!r},', sep, arg.name)
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sep = ' '
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builder.writeln(')')
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# Class-level variable to store its Telegram's constructor ID
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builder.writeln('CONSTRUCTOR_ID = {:#x}', tlobject.id)
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builder.writeln('SUBCLASS_OF_ID = {:#x}',
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crc32(tlobject.result.encode('ascii')))
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builder.writeln()
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# Because we're using __slots__ and frozen instances, we cannot have flags = None directly.
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# See https://stackoverflow.com/q/50180735 (Python 3.10 does offer a solution).
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# Write the __init__ function if it has any argument.
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if tlobject.real_args:
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# Convert the args to string parameters
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for a in tlobject.real_args:
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builder.writeln('{}: {}', a.name, a.type_hint())
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# Convert the args to string parameters, flags having =None
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args = ['{}: {}{}'.format(
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a.name, a.type_hint(), '=None' if a.is_flag or a.can_be_inferred else '')
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for a in tlobject.real_args
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]
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if any(a.name in dir(builtins) for a in tlobject.real_args):
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builder.writeln('# noinspection PyShadowingBuiltins')
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builder.writeln("def __init__({}):", ', '.join(['self'] + args))
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# Set the arguments
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for arg in tlobject.real_args:
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builder.writeln("object.__setattr__(self, '{0}', {0})", arg.name)
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builder.end_block()
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def _write_resolve(tlobject, builder):
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if tlobject.is_function and any(
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(arg.can_be_inferred
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or arg.type in AUTO_CASTS
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or ((arg.name, arg.type) in NAMED_AUTO_CASTS and tlobject.fullname not in NAMED_BLACKLIST))
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for arg in tlobject.real_args
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):
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builder.writeln('async def _resolve(self, client, utils):')
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builder.writeln('r = {}') # hold replacements
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for arg in tlobject.real_args:
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if arg.can_be_inferred:
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builder.writeln('if self.{} is None:', arg.name)
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# Currently the only argument that can be
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# inferred are those called 'random_id'
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if arg.name == 'random_id':
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# Endianness doesn't really matter, and 'big' is shorter
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code = "int.from_bytes(os.urandom({}), 'big', signed=True)" \
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.format(8 if arg.type == 'long' else 4)
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if arg.is_vector:
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# Currently for the case of "messages.forwardMessages"
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# Ensure we can infer the length from id:Vector<>
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if not next(a for a in tlobject.real_args if a.name == 'id').is_vector:
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raise ValueError('Cannot infer list of random ids for ', tlobject)
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code = '[{} for _ in range(len(self.id))]'.format(code)
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builder.writeln("r['{}'] = {}", arg.name, code)
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else:
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raise ValueError('Cannot infer a value for ', arg)
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builder.end_block()
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continue
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ac = AUTO_CASTS.get(arg.type)
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if not ac:
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ac = NAMED_AUTO_CASTS.get((arg.name, arg.type))
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if not ac:
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continue
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if arg.is_flag:
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builder.writeln('if self.{}:', arg.name)
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if arg.is_vector:
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builder.writeln("r['{}'] = []", arg.name)
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builder.writeln('for x in self.{0}:', arg.name)
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builder.writeln("r['{}'].append({})", arg.name, ac.format('x'))
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builder.end_block()
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else:
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builder.writeln("r['{}'] = {}", arg.name, ac.format('self.' + arg.name))
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if arg.is_flag:
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builder.end_block()
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builder.writeln('return dataclasses.replace(self, **r)')
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builder.end_block()
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def _write_to_bytes(tlobject, builder):
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builder.writeln('def _bytes(self):')
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# Some objects require more than one flag parameter to be set
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# at the same time. In this case, add an assertion.
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repeated_args = defaultdict(list)
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for arg in tlobject.args:
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if arg.is_flag:
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repeated_args[arg.flag_index].append(arg)
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for ra in repeated_args.values():
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if len(ra) > 1:
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cnd1 = ('(self.{0} or self.{0} is not None)'
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.format(a.name) for a in ra)
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cnd2 = ('(self.{0} is None or self.{0} is False)'
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.format(a.name) for a in ra)
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builder.writeln(
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"assert ({}) or ({}), '{} parameters must all "
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"be False-y (like None) or all me True-y'",
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' and '.join(cnd1), ' and '.join(cnd2),
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', '.join(a.name for a in ra)
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)
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builder.writeln("return b''.join((")
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builder.current_indent += 1
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# First constructor code, we already know its bytes
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builder.writeln('{},', repr(struct.pack('<I', tlobject.id)))
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for arg in tlobject.args:
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if _write_arg_to_bytes(builder, arg, tlobject):
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builder.writeln(',')
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builder.current_indent -= 1
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builder.writeln('))')
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builder.end_block()
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def _write_from_reader(tlobject, builder):
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builder.writeln('@classmethod')
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builder.writeln('def _from_reader(cls, reader):')
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for arg in tlobject.args:
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_write_arg_read_code(builder, arg, tlobject, name='_' + arg.name)
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builder.writeln('return cls({})', ', '.join(
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'{0}=_{0}'.format(a.name) for a in tlobject.real_args))
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def _write_read_result(tlobject, builder):
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# Only requests can have a different response that's not their
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# serialized body, that is, we'll be setting their .result.
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#
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# The default behaviour is reading a TLObject too, so no need
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# to override it unless necessary.
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if not tlobject.is_function:
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return
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# https://core.telegram.org/mtproto/serialize#boxed-and-bare-types
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# TL;DR; boxed types start with uppercase always, so we can use
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# this to check whether everything in it is boxed or not.
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#
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# Currently only un-boxed responses are Vector<int>/Vector<long>.
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# If this weren't the case, we should check upper case after
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# max(index('<'), index('.')) (and if it is, it's boxed, so return).
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m = re.match(r'Vector<(int|long)>', tlobject.result)
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if not m:
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return
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builder.end_block()
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builder.writeln('@staticmethod')
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builder.writeln('def _read_result(reader):')
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builder.writeln('reader.read_int() # Vector ID')
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builder.writeln('return [reader.read_{}() '
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'for _ in range(reader.read_int())]', m.group(1))
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def _write_arg_to_bytes(builder, arg, tlobject, name=None):
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"""
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Writes the .__bytes__() code for the given argument
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:param builder: The source code builder
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:param arg: The argument to write
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:param tlobject: The parent TLObject
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:param name: The name of the argument. Defaults to "self.argname"
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This argument is an option because it's required when
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writing Vectors<>
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"""
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if arg.generic_definition:
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return # Do nothing, this only specifies a later type
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if name is None:
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name = 'self.{}'.format(arg.name)
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# The argument may be a flag, only write if it's not None AND
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# if it's not a True type.
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# True types are not actually sent, but instead only used to
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# determine the flags.
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if arg.is_flag:
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if arg.type == 'true':
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return # Exit, since True type is never written
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elif arg.is_vector:
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# Vector flags are special since they consist of 3 values,
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# so we need an extra join here. Note that empty vector flags
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# should NOT be sent either!
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builder.write("b'' if {0} is None or {0} is False "
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"else b''.join((", name)
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elif 'Bool' == arg.type:
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# `False` is a valid value for this type, so only check for `None`.
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builder.write("b'' if {0} is None else (", name)
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else:
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builder.write("b'' if {0} is None or {0} is False "
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"else (", name)
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if arg.is_vector:
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if arg.use_vector_id:
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# vector code, unsigned 0x1cb5c415 as little endian
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builder.write(r"b'\x15\xc4\xb5\x1c',")
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builder.write("struct.pack('<i', len({})),", name)
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# Cannot unpack the values for the outer tuple through *[(
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# since that's a Python >3.5 feature, so add another join.
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builder.write("b''.join(")
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# Temporary disable .is_vector, not to enter this if again
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# Also disable .is_flag since it's not needed per element
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old_flag = arg.is_flag
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arg.is_vector = arg.is_flag = False
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_write_arg_to_bytes(builder, arg, tlobject, name='x')
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arg.is_vector = True
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arg.is_flag = old_flag
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builder.write(' for x in {})', name)
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elif arg.flag_indicator:
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# Calculate the flags with those items which are not None
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if not any(f.is_flag for f in tlobject.args):
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# There's a flag indicator, but no flag arguments so it's 0
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builder.write(r"b'\0\0\0\0'")
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else:
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def fmt_flag(flag):
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if flag.type == 'Bool':
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fmt = '(0 if {0} is None else {1})'
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else:
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fmt = '(0 if {0} is None or {0} is False else {1})'
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return fmt.format('self.{}'.format(flag.name), 1 << flag.flag_index)
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builder.write("struct.pack('<I', ")
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builder.write(
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' | '.join(fmt_flag(flag) for flag in tlobject.args if flag.is_flag)
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)
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builder.write(')')
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elif 'int' == arg.type:
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# User IDs are becoming larger than 2³¹ - 1, which would translate
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# into reading a negative ID, which we would treat as a chat. So
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# special case them to read unsigned. See https://t.me/BotNews/57.
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if arg.name == 'user_id' or (arg.name == 'id' and tlobject.result == 'User'):
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builder.write("struct.pack('<I', {})", name)
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else:
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# struct.pack is around 4 times faster than int.to_bytes
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builder.write("struct.pack('<i', {})", name)
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elif 'long' == arg.type:
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builder.write("struct.pack('<q', {})", name)
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|
elif 'int128' == arg.type:
|
|
builder.write("{}.to_bytes(16, 'little', signed=True)", name)
|
|
|
|
elif 'int256' == arg.type:
|
|
builder.write("{}.to_bytes(32, 'little', signed=True)", name)
|
|
|
|
elif 'double' == arg.type:
|
|
builder.write("struct.pack('<d', {})", name)
|
|
|
|
elif 'string' == arg.type:
|
|
builder.write('self._serialize_bytes({})', name)
|
|
|
|
elif 'Bool' == arg.type:
|
|
# 0x997275b5 if boolean else 0xbc799737
|
|
builder.write(r"b'\xb5ur\x99' if {} else b'7\x97y\xbc'", name)
|
|
|
|
elif 'true' == arg.type:
|
|
pass # These are actually NOT written! Only used for flags
|
|
|
|
elif 'bytes' == arg.type:
|
|
builder.write('self._serialize_bytes({})', name)
|
|
|
|
elif 'date' == arg.type: # Custom format
|
|
builder.write('self._serialize_datetime({})', name)
|
|
|
|
else:
|
|
# Else it may be a custom type
|
|
builder.write('{}._bytes()', name)
|
|
|
|
# If the type is not boxed (i.e. starts with lowercase) we should
|
|
# not serialize the constructor ID (so remove its first 4 bytes).
|
|
boxed = arg.type[arg.type.find('.') + 1].isupper()
|
|
if not boxed:
|
|
builder.write('[4:]')
|
|
|
|
if arg.is_flag:
|
|
builder.write(')')
|
|
if arg.is_vector:
|
|
builder.write(')') # We were using a tuple
|
|
|
|
return True # Something was written
|
|
|
|
|
|
def _write_arg_read_code(builder, arg, tlobject, name):
|
|
"""
|
|
Writes the read code for the given argument, setting the
|
|
arg.name variable to its read value.
|
|
|
|
:param builder: The source code builder
|
|
:param arg: The argument to write
|
|
:param tlobject: The parent TLObject
|
|
:param name: The name of the argument. Defaults to "self.argname"
|
|
This argument is an option because it's required when
|
|
writing Vectors<>
|
|
"""
|
|
|
|
if arg.generic_definition:
|
|
return # Do nothing, this only specifies a later type
|
|
|
|
# The argument may be a flag, only write that flag was given!
|
|
was_flag = False
|
|
if arg.is_flag:
|
|
# Treat 'true' flags as a special case, since they're true if
|
|
# they're set, and nothing else needs to actually be read.
|
|
if 'true' == arg.type:
|
|
builder.writeln('{} = bool(flags & {})',
|
|
name, 1 << arg.flag_index)
|
|
return
|
|
|
|
was_flag = True
|
|
builder.writeln('if flags & {}:', 1 << arg.flag_index)
|
|
# Temporary disable .is_flag not to enter this if
|
|
# again when calling the method recursively
|
|
arg.is_flag = False
|
|
|
|
if arg.is_vector:
|
|
if arg.use_vector_id:
|
|
# We have to read the vector's constructor ID
|
|
builder.writeln("reader.read_int()")
|
|
|
|
builder.writeln('{} = []', name)
|
|
builder.writeln('for _ in range(reader.read_int()):')
|
|
# Temporary disable .is_vector, not to enter this if again
|
|
arg.is_vector = False
|
|
_write_arg_read_code(builder, arg, tlobject, name='_x')
|
|
builder.writeln('{}.append(_x)', name)
|
|
arg.is_vector = True
|
|
|
|
elif arg.flag_indicator:
|
|
# Read the flags, which will indicate what items we should read next
|
|
builder.writeln('flags = reader.read_int()')
|
|
builder.writeln()
|
|
|
|
elif 'int' == arg.type:
|
|
# User IDs are becoming larger than 2³¹ - 1, which would translate
|
|
# into reading a negative ID, which we would treat as a chat. So
|
|
# special case them to read unsigned. See https://t.me/BotNews/57.
|
|
if arg.name == 'user_id' or (arg.name == 'id' and tlobject.result == 'User'):
|
|
builder.writeln('{} = reader.read_int(signed=False)', name)
|
|
else:
|
|
builder.writeln('{} = reader.read_int()', name)
|
|
|
|
elif 'long' == arg.type:
|
|
builder.writeln('{} = reader.read_long()', name)
|
|
|
|
elif 'int128' == arg.type:
|
|
builder.writeln('{} = reader.read_large_int(bits=128)', name)
|
|
|
|
elif 'int256' == arg.type:
|
|
builder.writeln('{} = reader.read_large_int(bits=256)', name)
|
|
|
|
elif 'double' == arg.type:
|
|
builder.writeln('{} = reader.read_double()', name)
|
|
|
|
elif 'string' == arg.type:
|
|
builder.writeln('{} = reader.tgread_string()', name)
|
|
|
|
elif 'Bool' == arg.type:
|
|
builder.writeln('{} = reader.tgread_bool()', name)
|
|
|
|
elif 'true' == arg.type:
|
|
# Arbitrary not-None value, don't actually read "true" flags
|
|
builder.writeln('{} = True', name)
|
|
|
|
elif 'bytes' == arg.type:
|
|
builder.writeln('{} = reader.tgread_bytes()', name)
|
|
|
|
elif 'date' == arg.type: # Custom format
|
|
builder.writeln('{} = reader.tgread_date()', name)
|
|
|
|
else:
|
|
# Else it may be a custom type
|
|
if not arg.skip_constructor_id:
|
|
builder.writeln('{} = reader.tgread_object()', name)
|
|
else:
|
|
# Import the correct type inline to avoid cyclic imports.
|
|
# There may be better solutions so that we can just access
|
|
# all the types before the files have been parsed, but I
|
|
# don't know of any.
|
|
sep_index = arg.type.find('.')
|
|
if sep_index == -1:
|
|
ns, t = '.', arg.type
|
|
else:
|
|
ns, t = '.' + arg.type[:sep_index], arg.type[sep_index+1:]
|
|
class_name = snake_to_camel_case(t)
|
|
|
|
# There would be no need to import the type if we're in the
|
|
# file with the same namespace, but since it does no harm
|
|
# and we don't have information about such thing in the
|
|
# method we just ignore that case.
|
|
builder.writeln('from {} import {}', ns, class_name)
|
|
builder.writeln('{} = {}._from_reader(reader)',
|
|
name, class_name)
|
|
|
|
# End vector and flag blocks if required (if we opened them before)
|
|
if arg.is_vector:
|
|
builder.end_block()
|
|
|
|
if was_flag:
|
|
builder.current_indent -= 1
|
|
builder.writeln('else:')
|
|
builder.writeln('{} = None', name)
|
|
builder.current_indent -= 1
|
|
# Restore .is_flag
|
|
arg.is_flag = True
|
|
|
|
|
|
def _write_all_tlobjects(tlobjects, layer, builder):
|
|
# Create a constant variable to indicate which layer this is
|
|
builder.writeln('LAYER = {}', layer)
|
|
builder.writeln()
|
|
|
|
# Then create the dictionary containing constructor_id: class
|
|
builder.writeln('tlobjects = {')
|
|
builder.current_indent += 1
|
|
|
|
# Fill the dictionary (0x1a2b3c4f: tl.full.type.path.Class)
|
|
for tlobject in tlobjects:
|
|
builder.write('{:#010x}: ', tlobject.id)
|
|
if tlobject.is_function:
|
|
builder.write('fn.')
|
|
|
|
if tlobject.namespace:
|
|
builder.write('{}.', tlobject.namespace)
|
|
|
|
builder.writeln('{},', tlobject.class_name)
|
|
|
|
builder.current_indent -= 1
|
|
builder.writeln('}')
|
|
|
|
|
|
def generate_tlobjects(tlobjects, layer, input_mod, output_dir):
|
|
# Group everything by {namespace: [tlobjects]} to generate __init__.py
|
|
namespace_functions = defaultdict(list)
|
|
namespace_types = defaultdict(list)
|
|
|
|
# Group {type: [constructors]} to generate the documentation
|
|
type_constructors = defaultdict(list)
|
|
for tlobject in tlobjects:
|
|
if tlobject.is_function:
|
|
namespace_functions[tlobject.namespace].append(tlobject)
|
|
else:
|
|
namespace_types[tlobject.namespace].append(tlobject)
|
|
type_constructors[tlobject.result].append(tlobject)
|
|
|
|
_write_modules(output_dir, input_mod, 'TLObject',
|
|
namespace_types, type_constructors, layer, tlobjects)
|
|
_write_modules(output_dir / 'fn', input_mod + '.fn', 'TLRequest',
|
|
namespace_functions, type_constructors, layer, tlobjects)
|
|
|
|
|
|
def clean_tlobjects(output_dir):
|
|
for d in ('functions', 'types'):
|
|
d = output_dir / d
|
|
if d.is_dir():
|
|
shutil.rmtree(str(d))
|