mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2025-11-04 01:47:27 +03:00
160a3699ac
This also fixes the annoyingly confusing message: "Odd msg_seqno expected (relevant message), but even received."
690 lines
27 KiB
Python
690 lines
27 KiB
Python
import os
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import re
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import shutil
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from zlib import crc32
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from collections import defaultdict
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from .parser import SourceBuilder, TLParser
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class TLGenerator:
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def __init__(self, output_dir):
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self.output_dir = output_dir
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def _get_file(self, *paths):
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return os.path.join(self.output_dir, *paths)
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def _rm_if_exists(self, filename):
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file = self._get_file(filename)
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if os.path.exists(file):
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if os.path.isdir(file):
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shutil.rmtree(file)
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else:
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os.remove(file)
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def tlobjects_exist(self):
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"""Determines whether the TLObjects were previously
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generated (hence exist) or not
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"""
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return os.path.isfile(self._get_file('all_tlobjects.py'))
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def clean_tlobjects(self):
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"""Cleans the automatically generated TLObjects from disk"""
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for name in ('functions', 'types', 'all_tlobjects.py'):
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self._rm_if_exists(name)
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def generate_tlobjects(self, scheme_file, import_depth):
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"""Generates all the TLObjects from scheme.tl to
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tl/functions and tl/types
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"""
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# First ensure that the required parent directories exist
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os.makedirs(self._get_file('functions'), exist_ok=True)
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os.makedirs(self._get_file('types'), exist_ok=True)
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# Step 0: Cache the parsed file on a tuple
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tlobjects = tuple(TLParser.parse_file(scheme_file))
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# Step 1: Ensure that no object has the same name as a namespace
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# We must check this because Python will complain if it sees a
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# file and a directory with the same name, which happens for
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# example with "updates".
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#
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# We distinguish between function and type namespaces since we
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# will later need to perform a relative import for them to be used
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function_namespaces = set()
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type_namespaces = set()
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# Make use of this iteration to also store 'Type: [Constructors]'
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type_constructors = defaultdict(list)
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for tlobject in tlobjects:
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if tlobject.is_function:
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if tlobject.namespace:
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function_namespaces.add(tlobject.namespace)
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else:
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type_constructors[tlobject.result].append(tlobject)
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if tlobject.namespace:
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type_namespaces.add(tlobject.namespace)
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# Merge both namespaces to easily check if any namespace exists,
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# though we could also distinguish between types and functions
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# here, it's not worth doing
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namespace_directories = function_namespaces | type_namespaces
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for tlobject in tlobjects:
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if TLGenerator.get_file_name(tlobject, add_extension=False) \
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in namespace_directories:
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# If this TLObject isn't under the same directory as its
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# name (i.e. "contacts"), append "_tg" to avoid confusion
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# between the file and the directory (i.e. "updates")
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if tlobject.namespace != tlobject.name:
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tlobject.name += '_tg'
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# Step 2: Generate the actual code
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for tlobject in tlobjects:
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# Omit core types, these are embedded in the generated code
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if tlobject.is_core_type():
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continue
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# Determine the output directory and create it
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out_dir = self._get_file('functions'
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if tlobject.is_function else 'types')
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# Path depth to perform relative import
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depth = import_depth
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if tlobject.namespace:
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depth += 1
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out_dir = os.path.join(out_dir, tlobject.namespace)
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os.makedirs(out_dir, exist_ok=True)
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# Add this object to __init__.py, so we can import *
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init_py = os.path.join(out_dir, '__init__.py')
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with open(init_py, 'a', encoding='utf-8') as file:
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with SourceBuilder(file) as builder:
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builder.writeln('from .{} import {}'.format(
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TLGenerator.get_file_name(tlobject, add_extension=False),
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TLGenerator.get_class_name(tlobject)))
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# Create the file for this TLObject
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filename = os.path.join(out_dir, TLGenerator.get_file_name(
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tlobject, add_extension=True
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))
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with open(filename, 'w', encoding='utf-8') as file:
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with SourceBuilder(file) as builder:
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TLGenerator._write_source_code(
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tlobject, builder, depth, type_constructors)
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# Step 3: Add the relative imports to the namespaces on __init__.py's
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init_py = self._get_file('functions', '__init__.py')
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with open(init_py, 'a') as file:
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file.write('from . import {}\n'
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.format(', '.join(function_namespaces)))
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init_py = self._get_file('types', '__init__.py')
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with open(init_py, 'a') as file:
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file.write('from . import {}\n'
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.format(', '.join(type_namespaces)))
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# Step 4: Once all the objects have been generated,
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# we can now group them in a single file
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filename = os.path.join(self._get_file('all_tlobjects.py'))
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with open(filename, 'w', encoding='utf-8') as file:
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with SourceBuilder(file) as builder:
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builder.writeln(
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'"""File generated by TLObjects\' generator. All changes will be ERASED"""')
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builder.writeln()
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builder.writeln('from . import types, functions')
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builder.writeln()
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# Create a variable to indicate which layer this is
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builder.writeln('layer = {} # Current generated layer'.format(
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TLParser.find_layer(scheme_file)))
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builder.writeln()
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# Then create the dictionary containing constructor_id: class
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builder.writeln('tlobjects = {')
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builder.current_indent += 1
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# Fill the dictionary (0x1a2b3c4f: tl.full.type.path.Class)
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for tlobject in tlobjects:
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constructor = hex(tlobject.id)
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if len(constructor) != 10:
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# Make it a nice length 10 so it fits well
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constructor = '0x' + constructor[2:].zfill(8)
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builder.write('{}: '.format(constructor))
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builder.write(
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'functions' if tlobject.is_function else 'types')
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if tlobject.namespace:
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builder.write('.' + tlobject.namespace)
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builder.writeln('.{},'.format(
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TLGenerator.get_class_name(tlobject)))
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builder.current_indent -= 1
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builder.writeln('}')
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@staticmethod
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def _write_source_code(tlobject, builder, depth, type_constructors):
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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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# Both types and functions inherit from the TLObject class so they
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# all can be serialized and sent, however, only the functions are
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# "content_related".
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builder.writeln('from {}.tl.tlobject import TLObject'
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.format('.' * depth))
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if tlobject.is_function:
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util_imports = set()
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for a in tlobject.args:
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# We can automatically convert some "full" types to
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# "input only" (like User -> InputPeerUser, etc.)
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if a.type == 'InputPeer':
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util_imports.add('get_input_peer')
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elif a.type == 'InputChannel':
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util_imports.add('get_input_channel')
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elif a.type == 'InputUser':
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util_imports.add('get_input_user')
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if util_imports:
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builder.writeln('from {}.utils import {}'.format(
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'.' * depth, ', '.join(util_imports)))
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if any(a for a in tlobject.args if a.can_be_inferred):
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# Currently only 'random_id' needs 'os' to be imported
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builder.writeln('import os')
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builder.writeln()
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builder.writeln()
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builder.writeln('class {}(TLObject):'.format(
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TLGenerator.get_class_name(tlobject)))
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# Write the original .tl definition,
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# along with a "generated automatically" message
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builder.writeln(
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'"""Class generated by TLObjects\' generator. '
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'All changes will be ERASED. TL definition below.'
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)
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builder.writeln('{}"""'.format(repr(tlobject)))
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builder.writeln()
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# Class-level variable to store its constructor ID
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builder.writeln("# Telegram's constructor (U)ID for this class")
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builder.writeln('constructor_id = {}'.format(hex(tlobject.id)))
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builder.writeln("# Also the ID of its resulting type for fast checks")
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builder.writeln('subclass_of_id = {}'.format(
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hex(crc32(tlobject.result.encode('ascii')))))
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builder.writeln()
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# Flag arguments must go last
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args = [
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a for a in tlobject.sorted_args()
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if not a.flag_indicator and not a.generic_definition
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]
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# Convert the args to string parameters, flags having =None
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args = [
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(a.name if not a.is_flag and not a.can_be_inferred
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else '{}=None'.format(a.name))
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for a in args
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]
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# Write the __init__ function
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if args:
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builder.writeln(
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'def __init__(self, {}):'.format(', '.join(args))
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)
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else:
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builder.writeln('def __init__(self):')
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# Now update args to have the TLObject arguments, _except_
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# those which are calculated on send or ignored, this is
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# flag indicator and generic definitions.
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#
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# We don't need the generic definitions in Python
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# because arguments can be any type
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args = [arg for arg in tlobject.args
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if not arg.flag_indicator and
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not arg.generic_definition]
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if args:
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# Write the docstring, to know the type of the args
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builder.writeln('"""')
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for arg in args:
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if not arg.flag_indicator:
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builder.write(
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':param {}: Telegram type: "{}".'
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.format(arg.name, arg.type)
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)
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if arg.is_vector:
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builder.write(' Must be a list.'.format(arg.name))
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if arg.is_generic:
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builder.write(' Must be another TLObject request.')
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builder.writeln()
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# We also want to know what type this request returns
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# or to which type this constructor belongs to
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builder.writeln()
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if tlobject.is_function:
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builder.write(':returns {}: '.format(tlobject.result))
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else:
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builder.write('Constructor for {}: '.format(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 {}.'.format(
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TLGenerator.get_class_name(constructors[0])
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))
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else:
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builder.writeln('Instance of either {}.'.format(
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', '.join(TLGenerator.get_class_name(c)
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for c in constructors)
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))
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builder.writeln('"""')
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builder.writeln('super().__init__()')
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# Functions have a result object and are confirmed by default
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if tlobject.is_function:
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builder.writeln('self.result = None')
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builder.writeln(
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'self.content_related = True')
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# Set the arguments
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if args:
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# Leave an empty line if there are any args
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builder.writeln()
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for arg in args:
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if arg.can_be_inferred:
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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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builder.writeln(
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"self.random_id = random_id if random_id "
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"is not None else int.from_bytes("
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"os.urandom({}), signed=True, "
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"byteorder='little')"
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.format(8 if arg.type == 'long' else 4)
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)
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else:
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raise ValueError('Cannot infer a value for ', arg)
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# Well-known cases, auto-cast it to the right type
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elif arg.type == 'InputPeer' and tlobject.is_function:
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TLGenerator.write_get_input(builder, arg, 'get_input_peer')
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elif arg.type == 'InputChannel' and tlobject.is_function:
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TLGenerator.write_get_input(builder, arg, 'get_input_channel')
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elif arg.type == 'InputUser' and tlobject.is_function:
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TLGenerator.write_get_input(builder, arg, 'get_input_user')
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else:
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builder.writeln('self.{0} = {0}'.format(arg.name))
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builder.end_block()
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# Write the to_dict(self) method
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if args:
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builder.writeln('def to_dict(self):')
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builder.writeln('return {')
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builder.current_indent += 1
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base_types = ('string', 'bytes', 'int', 'long', 'int128',
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'int256', 'double', 'Bool', 'true', 'date')
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for arg in args:
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builder.write("'{}': ".format(arg.name))
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if arg.type in base_types:
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if arg.is_vector:
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builder.write(
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'[] if self.{0} is None else self.{0}[:]'
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.format(arg.name)
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)
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else:
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builder.write('self.{}'.format(arg.name))
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else:
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if arg.is_vector:
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builder.write(
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'[] if self.{0} is None else [None '
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'if x is None else x.to_dict() for x in self.{0}]'
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.format(arg.name)
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)
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else:
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builder.write(
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'None if self.{0} is None else self.{0}.to_dict()'
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.format(arg.name)
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)
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builder.writeln(',')
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builder.current_indent -= 1
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builder.writeln("}")
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else:
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builder.writeln('@staticmethod')
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builder.writeln('def to_dict():')
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builder.writeln('return {}')
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builder.end_block()
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# Write the on_send(self, writer) function
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builder.writeln('def on_send(self, writer):')
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builder.writeln(
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'writer.write_int({}.constructor_id, signed=False)'
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.format(TLGenerator.get_class_name(tlobject)))
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for arg in tlobject.args:
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TLGenerator.write_onsend_code(builder, arg,
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tlobject.args)
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builder.end_block()
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# Write the empty() function, which returns an "empty"
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# instance, in which all attributes are set to None
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builder.writeln('@staticmethod')
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builder.writeln('def empty():')
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builder.writeln(
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'"""Returns an "empty" instance (attributes=None)"""')
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builder.writeln('return {}({})'.format(
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TLGenerator.get_class_name(tlobject), ', '.join(
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'None' for _ in range(len(args)))))
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builder.end_block()
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# Write the on_response(self, reader) function
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builder.writeln('def on_response(self, reader):')
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# Do not read constructor's ID, since
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# that's already been read somewhere else
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if tlobject.is_function:
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TLGenerator.write_request_result_code(builder, tlobject)
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else:
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if tlobject.args:
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for arg in tlobject.args:
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TLGenerator.write_onresponse_code(
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builder, arg, tlobject.args)
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else:
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# If there were no arguments, we still need an
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# on_response method, and hence "pass" if empty
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builder.writeln('pass')
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builder.end_block()
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# Write the __repr__(self) and __str__(self) functions
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builder.writeln('def __repr__(self):')
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builder.writeln("return '{}'".format(repr(tlobject)))
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builder.end_block()
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builder.writeln('def __str__(self):')
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builder.writeln('return TLObject.pretty_format(self)')
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builder.end_block()
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builder.writeln('def stringify(self):')
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builder.writeln('return TLObject.pretty_format(self, indent=0)')
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# builder.end_block() # No need to end the last block
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@staticmethod
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def write_get_input(builder, arg, get_input_code):
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"""Returns "True" if the get_input_* code was written when assigning
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a parameter upon creating the request. Returns False otherwise
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"""
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if arg.is_vector:
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builder.writeln(
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'self.{0} = [{1}(_x) for _x in {0}]'
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.format(arg.name, get_input_code)
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)
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pass
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else:
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builder.writeln(
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'self.{0} = {1}({0})'.format(arg.name, get_input_code)
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)
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@staticmethod
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def get_class_name(tlobject):
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"""Gets the class name following the Python style guidelines, in ThisClassFormat"""
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# Courtesy of http://stackoverflow.com/a/31531797/4759433
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# Also, '_' could be replaced for ' ', then use .title(), and then remove ' '
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result = re.sub(r'_([a-z])', lambda m: m.group(1).upper(),
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tlobject.name)
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result = result[:1].upper() + result[1:].replace(
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'_', '') # Replace again to fully ensure!
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# If it's a function, let it end with "Request" to identify them more easily
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if tlobject.is_function:
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result += 'Request'
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return result
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@staticmethod
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def get_file_name(tlobject, add_extension=False):
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"""Gets the file name in file_name_format.py for the given TLObject"""
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# Courtesy of http://stackoverflow.com/a/1176023/4759433
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s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', tlobject.name)
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result = re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()
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if add_extension:
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return result + '.py'
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else:
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return result
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@staticmethod
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def write_onsend_code(builder, arg, args, name=None):
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"""
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Writes the write 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 args: All the other arguments in TLObject same on_send. This is required to determine the flags value
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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 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 if it's not a True type
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# True types are not actually sent, but instead only used to determine the flags
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if arg.is_flag:
|
|
if arg.type == 'true':
|
|
return # Exit, since True type is never written
|
|
else:
|
|
builder.writeln('if {}:'.format(name))
|
|
|
|
if arg.is_vector:
|
|
if arg.use_vector_id:
|
|
builder.writeln(
|
|
"writer.write_int(0x1cb5c415, signed=False) # Vector's constructor ID")
|
|
|
|
builder.writeln('writer.write_int(len({}))'.format(name))
|
|
builder.writeln('for _x in {}:'.format(name))
|
|
# Temporary disable .is_vector, not to enter this if again
|
|
arg.is_vector = False
|
|
TLGenerator.write_onsend_code(builder, arg, args, name='_x')
|
|
arg.is_vector = True
|
|
|
|
elif arg.flag_indicator:
|
|
# Calculate the flags with those items which are not None
|
|
builder.writeln(
|
|
'# Calculate the flags. This equals to those flag arguments which are NOT None')
|
|
builder.writeln('flags = 0')
|
|
for flag in args:
|
|
if flag.is_flag:
|
|
builder.writeln('flags |= (1 << {}) if {} else 0'.format(
|
|
flag.flag_index, 'self.{}'.format(flag.name)))
|
|
|
|
builder.writeln('writer.write_int(flags)')
|
|
builder.writeln()
|
|
|
|
elif 'int' == arg.type:
|
|
builder.writeln('writer.write_int({})'.format(name))
|
|
|
|
elif 'long' == arg.type:
|
|
builder.writeln('writer.write_long({})'.format(name))
|
|
|
|
elif 'int128' == arg.type:
|
|
builder.writeln('writer.write_large_int({}, bits=128)'.format(
|
|
name))
|
|
|
|
elif 'int256' == arg.type:
|
|
builder.writeln('writer.write_large_int({}, bits=256)'.format(
|
|
name))
|
|
|
|
elif 'double' == arg.type:
|
|
builder.writeln('writer.write_double({})'.format(name))
|
|
|
|
elif 'string' == arg.type:
|
|
builder.writeln('writer.tgwrite_string({})'.format(name))
|
|
|
|
elif 'Bool' == arg.type:
|
|
builder.writeln('writer.tgwrite_bool({})'.format(name))
|
|
|
|
elif 'true' == arg.type: # Awkwardly enough, Telegram has both bool and "true", used in flags
|
|
pass # These are actually NOT written! Only used for flags
|
|
|
|
elif 'bytes' == arg.type:
|
|
builder.writeln('writer.tgwrite_bytes({})'.format(name))
|
|
|
|
elif 'date' == arg.type: # Custom format
|
|
builder.writeln('writer.tgwrite_date({})'.format(name))
|
|
|
|
else:
|
|
# Else it may be a custom type
|
|
builder.writeln('{}.on_send(writer)'.format(name))
|
|
|
|
# End vector and flag blocks if required (if we opened them before)
|
|
if arg.is_vector:
|
|
builder.end_block()
|
|
|
|
if arg.is_flag:
|
|
builder.end_block()
|
|
|
|
@staticmethod
|
|
def write_onresponse_code(builder, arg, args, name=None):
|
|
"""
|
|
Writes the receive code for the given argument
|
|
|
|
:param builder: The source code builder
|
|
:param arg: The argument to write
|
|
:param args: All the other arguments in TLObject same on_send. This is required to determine the flags value
|
|
: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
|
|
|
|
if name is None:
|
|
name = 'self.{}'.format(arg.name)
|
|
|
|
# The argument may be a flag, only write that flag was given!
|
|
was_flag = False
|
|
if arg.is_flag:
|
|
was_flag = True
|
|
builder.writeln('if (flags & (1 << {})) != 0:'.format(
|
|
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:
|
|
builder.writeln("reader.read_int() # Vector's constructor ID")
|
|
|
|
builder.writeln('{} = [] # Initialize an empty list'.format(name))
|
|
builder.writeln('_len = reader.read_int()')
|
|
builder.writeln('for _ in range(_len):')
|
|
# Temporary disable .is_vector, not to enter this if again
|
|
arg.is_vector = False
|
|
TLGenerator.write_onresponse_code(builder, arg, args, name='_x')
|
|
builder.writeln('{}.append(_x)'.format(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:
|
|
builder.writeln('{} = reader.read_int()'.format(name))
|
|
|
|
elif 'long' == arg.type:
|
|
builder.writeln('{} = reader.read_long()'.format(name))
|
|
|
|
elif 'int128' == arg.type:
|
|
builder.writeln(
|
|
'{} = reader.read_large_int(bits=128)'.format(name)
|
|
)
|
|
|
|
elif 'int256' == arg.type:
|
|
builder.writeln(
|
|
'{} = reader.read_large_int(bits=256)'.format(name)
|
|
)
|
|
|
|
elif 'double' == arg.type:
|
|
builder.writeln('{} = reader.read_double()'.format(name))
|
|
|
|
elif 'string' == arg.type:
|
|
builder.writeln('{} = reader.tgread_string()'.format(name))
|
|
|
|
elif 'Bool' == arg.type:
|
|
builder.writeln('{} = reader.tgread_bool()'.format(name))
|
|
|
|
elif 'true' == arg.type: # Awkwardly enough, Telegram has both bool and "true", used in flags
|
|
builder.writeln(
|
|
'{} = True # Arbitrary not-None value, no need to read since it is a flag'.
|
|
format(name))
|
|
|
|
elif 'bytes' == arg.type:
|
|
builder.writeln('{} = reader.tgread_bytes()'.format(name))
|
|
|
|
elif 'date' == arg.type: # Custom format
|
|
builder.writeln('{} = reader.tgread_date()'.format(name))
|
|
|
|
else:
|
|
# Else it may be a custom type
|
|
builder.writeln('{} = reader.tgread_object()'.format(name))
|
|
|
|
# End vector and flag blocks if required (if we opened them before)
|
|
if arg.is_vector:
|
|
builder.end_block()
|
|
|
|
if was_flag:
|
|
builder.end_block()
|
|
# Restore .is_flag
|
|
arg.is_flag = True
|
|
|
|
@staticmethod
|
|
def write_request_result_code(builder, tlobject):
|
|
"""
|
|
Writes the receive code for the given function
|
|
|
|
:param builder: The source code builder
|
|
:param tlobject: The TLObject for which the 'self.result = ' will be written
|
|
"""
|
|
if tlobject.result.startswith('Vector<'):
|
|
# Vector results are a bit special since they can also be composed
|
|
# of integer values and such; however, the result of requests is
|
|
# not parsed as arguments are and it's a bit harder to tell which
|
|
# is which.
|
|
if tlobject.result == 'Vector<int>':
|
|
builder.writeln('reader.read_int() # Vector id')
|
|
builder.writeln('count = reader.read_int()')
|
|
builder.writeln('self.result = [reader.read_int() for _ in range(count)]')
|
|
|
|
elif tlobject.result == 'Vector<long>':
|
|
builder.writeln('reader.read_int() # Vector id')
|
|
builder.writeln('count = reader.read_long()')
|
|
builder.writeln('self.result = [reader.read_long() for _ in range(count)]')
|
|
|
|
else:
|
|
builder.writeln('self.result = reader.tgread_vector()')
|
|
else:
|
|
builder.writeln('self.result = reader.tgread_object()')
|