64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
#!/usr/bin/env python3
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from datetime import datetime
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from hashlib import sha1
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from pathlib import Path
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from sqlalchemy import LargeBinary, Column, ForeignKey, Integer, String, DateTime, create_engine
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import Session, relationship, backref
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from sqlalchemy.orm.collections import attribute_mapped_collection
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now = '{0:%Y%m%dT%H%M%S}'.format(datetime.utcnow())
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Base = declarative_base()
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def db_config(path: Path) -> Session:
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engine = create_engine(f'sqlite:///{path.resolve()}', native_datetime=True)
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Base.metadata.create_all(engine)
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session = Session(engine)
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return session
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class ScrapNode(Base):
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__tablename__ = 'scrap_node'
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ctime = Column(DateTime, default=datetime.utcnow)
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id = Column(Integer, primary_key=True)
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length = Column(Integer, default=0)
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mtime = Column(DateTime, onupdate=datetime.utcnow)
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parent_id = Column(Integer, ForeignKey(id))
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checksum = Column(String)
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objdump = Column(String)
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image = Column(LargeBinary)
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children = relationship(
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"ScrapNode",
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cascade="all, delete-orphan",
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backref=backref("parent", remote_side=id),
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collection_class=attribute_mapped_collection('name'))
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def __init__(self, *, child: bytes, parent_id: int = None):
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self.parent_id = parent_id
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self.image = child
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self.length = len(child)
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self.sha1sum
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def __repr__(self):
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values = {
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'checksum': self.checksum,
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'length': self.length,
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'parent_id': self.parent_id,
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'id': self.id,
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}
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return f'{values}\n{self.objdump}'
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@property
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def sha1sum(self):
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if self.checksum:
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return self.checksum
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checksum = sha1()
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checksum.update(self.image)
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self.checksum = checksum.hexdigest()
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return self.checksum
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