63 lines
2.4 KiB
Python
63 lines
2.4 KiB
Python
"""Main Kasten object, does nothing but provide access to packed Kasten bytes and call a specified generator function"""
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from msgpack import unpackb
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from .types import KastenChecksum
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from .types import KastenPacked
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from .generator import pack
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"""
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Copyright (C) <2020> Kevin Froman
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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class Kasten:
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def __init__(self,
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id: KastenChecksum,
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packed_bytes: KastenPacked,
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generator: 'KastenBaseGenerator', # noqa
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*additional_generator_args,
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auto_check_generator=True,
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**additional_generator_kwargs): # noqa
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self.id = id
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self.generator = generator
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header, data = packed_bytes.split(b'\n', 1)
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header = unpackb(header, strict_map_key=True)
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self.header = header
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self.data = data
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self.additional_generator_args = list(additional_generator_args)
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self.additional_generator_kwargs = dict(additional_generator_kwargs)
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if auto_check_generator:
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self.check_generator()
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def check_generator(self, generator=None):
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packed = self.get_packed()
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if generator is None:
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self.generator.validate_id(
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self.id, packed, *self.additional_generator_args, **self.additional_generator_kwargs)
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else:
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generator(self.id, packed)
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# Getters are gross, but they are used here to preserve space
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def get_packed(self) -> KastenPacked:
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return pack.pack(self.data, self.get_data_type(),
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self.get_encryption_mode(),
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timestamp=self.get_timestamp())
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def get_data_type(self) -> str: return self.header[0]
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def get_encryption_mode(self): return self.header[1]
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def get_timestamp(self): return self.header[2]
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