import abc import struct from datetime import datetime, date, timedelta class TLObject: CONSTRUCTOR_ID = None SUBCLASS_OF_ID = None @staticmethod def pretty_format(obj, indent=None): """ Pretty formats the given object as a string which is returned. If indent is None, a single line will be returned. """ if indent is None: if isinstance(obj, TLObject): obj = obj.to_dict() if isinstance(obj, dict): return '{}({})'.format(obj.get('_', 'dict'), ', '.join( '{}={}'.format(k, TLObject.pretty_format(v)) for k, v in obj.items() if k != '_' )) elif isinstance(obj, str) or isinstance(obj, bytes): return repr(obj) elif hasattr(obj, '__iter__'): return '[{}]'.format( ', '.join(TLObject.pretty_format(x) for x in obj) ) else: return repr(obj) else: result = [] if isinstance(obj, TLObject): obj = obj.to_dict() if isinstance(obj, dict): result.append(obj.get('_', 'dict')) result.append('(') if obj: result.append('\n') indent += 1 for k, v in obj.items(): if k == '_': continue result.append('\t' * indent) result.append(k) result.append('=') result.append(TLObject.pretty_format(v, indent)) result.append(',\n') result.pop() # last ',\n' indent -= 1 result.append('\n') result.append('\t' * indent) result.append(')') elif isinstance(obj, str) or isinstance(obj, bytes): result.append(repr(obj)) elif hasattr(obj, '__iter__'): result.append('[\n') indent += 1 for x in obj: result.append('\t' * indent) result.append(TLObject.pretty_format(x, indent)) result.append(',\n') indent -= 1 result.append('\t' * indent) result.append(']') else: result.append(repr(obj)) return ''.join(result) @staticmethod def serialize_bytes(data): """Write bytes by using Telegram guidelines""" if not isinstance(data, bytes): if isinstance(data, str): data = data.encode('utf-8') else: raise TypeError( 'bytes or str expected, not {}'.format(type(data))) r = [] if len(data) < 254: padding = (len(data) + 1) % 4 if padding != 0: padding = 4 - padding r.append(bytes([len(data)])) r.append(data) else: padding = len(data) % 4 if padding != 0: padding = 4 - padding r.append(bytes([ 254, len(data) % 256, (len(data) >> 8) % 256, (len(data) >> 16) % 256 ])) r.append(data) r.append(bytes(padding)) return b''.join(r) @staticmethod def serialize_datetime(dt): if not dt: return b'\0\0\0\0' if isinstance(dt, datetime): dt = int(dt.timestamp()) elif isinstance(dt, date): dt = int(datetime(dt.year, dt.month, dt.day).timestamp()) elif isinstance(dt, float): dt = int(dt) elif isinstance(dt, timedelta): # Timezones are tricky. datetime.now() + ... timestamp() works dt = int((datetime.now() + dt).timestamp()) if isinstance(dt, int): return struct.pack('