from ..enums import ClassIDType from . import SerializedFile from .. import classes from ..streams import EndianBinaryReader, EndianBinaryWriter from ..helpers import TypeTreeHelper class ObjectReader: byte_start: int byte_size: int type_id: int class_id: int type: ClassIDType path_id: int # serialized_type: SerializedType _read_until: int # saves where the parser stopped # in case that not all data is read # and the obj.data is changed, the unknown data can be added again def __init__(self, assets_file, reader: EndianBinaryReader): self.assets_file = assets_file self.reader = reader self.data = b"" self.version = assets_file.version self.version2 = assets_file.header.version self.platform = assets_file.target_platform self.build_type = assets_file.build_type header = assets_file.header types = assets_file.types if assets_file.big_id_enabled: self.path_id = reader.read_long() elif header.version < 14: self.path_id = reader.read_int() else: reader.align_stream() self.path_id = reader.read_long() if header.version >= 22: self.byte_start_offset = (self.reader.real_offset(), 8) self.byte_start = reader.read_long() else: self.byte_start_offset = (self.reader.real_offset(), 4) self.byte_start = reader.read_u_int() self.byte_start += header.data_offset self.byte_header_offset = header.data_offset self.byte_base_offset = self.reader.BaseOffset self.byte_size_offset = (self.reader.real_offset(), 4) self.byte_size = reader.read_u_int() self.type_id = reader.read_int() if header.version < 16: self.class_id = reader.read_u_short() if types: self.serialized_type = ( x for x in types if x.class_id == self.type_id).__next__() else: self.serialized_type = SerializedFile.SerializedType( reader, self.assets_file) else: typ = types[self.type_id] self.serialized_type = typ self.class_id = typ.class_id self.type = ClassIDType(self.class_id) if header.version < 11: self.is_destroyed = reader.read_u_short() if 11 <= header.version < 17: script_type_index = reader.read_short() if self.serialized_type: self.serialized_type.script_type_index = script_type_index if header.version == 15 or header.version == 16: self.stripped = reader.read_byte() def write(self, header, writer: EndianBinaryWriter, data_writer: EndianBinaryWriter): if self.assets_file.big_id_enabled: writer.write_long(self.path_id) elif header.version < 14: writer.write_int(self.path_id) else: writer.align_stream() writer.write_long(self.path_id) if self.data: data = self.data # in some cases the parser doesn't read all of the object data # games might still require the missing data # so following code appends the missing data back to edited objects if self.type != ClassIDType.MonoBehaviour: end_pos = self.byte_start + self.byte_size if self._read_until and self._read_until != end_pos: self.reader.Position = self._read_until data += self.reader.read_bytes(end_pos - self._read_until) else: self.reset() data = self.reader.read(self.byte_size) if header.version >= 22: writer.write_long(data_writer.Position) else: writer.write_u_int(data_writer.Position) writer.write_u_int(len(data)) data_writer.write(data) writer.write_int(self.type_id) if header.version < 16: writer.write_u_short(self.class_id) if header.version < 11: writer.write_u_short(self.is_destroyed) if 11 <= header.version < 17: writer.write_short(self.serialized_type.script_type_index) if header.version == 15 or header.version == 16: writer.write_byte(self.stripped) def set_raw_data(self, data): self.data = data self.assets_file.mark_changed() @property def container(self): return ( self.assets_file._container[self.path_id] if self.path_id in self.assets_file._container else None ) @property def Position(self): return self.reader.Position @Position.setter def Position(self, pos): self.reader.Position = pos def reset(self): self.reader.Position = self.byte_start def read(self): try: obj = getattr(classes, self.type.name, classes.Object)(self) except Exception as e: raise e # TODO: only specific exceptions here? except: # HACK: in case the parsing via the class fails this solution # uses the type tree to set the variables and then changes the class obj = classes.Object(self) obj.__class__ = getattr(classes, self.type.name, classes.Object) for key, val in obj.__dict__.items(): if " " in key: obj.__dict__[key.replace(" ", "_")] = val delattr(obj, key) self._read_until = self.reader.Position return obj def get(self, key, default=None): return getattr(self, key, default) def __getattr__(self, item: str): if hasattr(self.reader, item): return getattr(self.reader, item) def __repr__(self): return "<%s %s>" % (self.__class__.__name__, self.type.name) ################################################### # # Typetree Stuff # ################################################### def dump_typetree(self, nodes: list = None) -> str: self.reset() sb = [] if nodes: TypeTreeHelper.read_typetree_str(sb, nodes, self) elif getattr(self.serialized_type, "nodes", None): TypeTreeHelper.read_typetree_str( sb, self.serialized_type.nodes, self) return "".join(sb) return "" def dump_typetree_structure(self) -> str: if getattr(self.serialized_type, "nodes", None): return TypeTreeHelper.dump_typetree(self.serialized_type.nodes) return "" def read_typetree(self, nodes: list = None) -> dict: self.reset() tree = {} if nodes: tree = TypeTreeHelper.read_typetree(nodes, self) elif self.serialized_type.nodes: tree = TypeTreeHelper.read_typetree( self.serialized_type.nodes, self) return tree def save_typetree(self, tree: dict, nodes: list = None, writer: EndianBinaryWriter = None): if not writer: writer = EndianBinaryWriter(endian=self.reader.endian) if nodes: TypeTreeHelper.write_typetree(tree, nodes, writer) elif self.serialized_type.nodes: TypeTreeHelper.write_typetree( tree, self.serialized_type.nodes, writer) else: raise ValueError("There are no TypeTree nodes for this object.") data = writer.bytes self.set_raw_data(data) return data def get_raw_data(self) -> bytes: pos = self.Position self.reset() ret = self.reader.read_bytes(self.byte_size) self.Position = pos return ret def set_raw_data(self, data): self.data = data if self.assets_file: self.assets_file.mark_changed()