"""Hash implementation and save in database
"""
import hashlib
from citext import CIText
from sqlalchemy import Column
from sqlalchemy.dialects.postgresql import UUID
from uuid import uuid4
from ereuse_devicehub.db import db
class ReportHash(db.Model):
"""Save the hash than is create when one report is download.
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
id.comment = """The identifier of the device for this database. Used only
internally for software; users should not use this.
created = db.Column(db.TIMESTAMP(timezone=True),
nullable=False,
index=True,
server_default=db.text('CURRENT_TIMESTAMP'))
created.comment = """When Devicehub created this."""
hash3 = db.Column(CIText(), nullable=False)
hash3.comment = """The normalized name of the hash."""
def insert_hash(bfile, commit=True):
hash3 = hashlib.sha3_256(bfile).hexdigest()
db_hash = ReportHash(hash3=hash3)
db.session.add(db_hash)
if commit:
db.session.commit()
db.session.flush()
return hash3
def verify_hash(bfile):
hash3 = hashlib.sha3_256(bfile.read()).hexdigest()
return ReportHash.query.filter(ReportHash.hash3 == hash3).count()
