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from sqlite3 import Connection, Cursor, Error
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from src.db_objects.private_key import PrivateKey
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from src.constants import *
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class PrivateKeyRepository:
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def __init__(self, connection: Connection, cursor: Cursor):
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"""
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Constructor of the PrivateKeyRepository object
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:param connection: Instance of the Connection object
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:param cursor: Instance of the Cursor object
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"""
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self.connection = connection
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self.cursor = cursor
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def create(self, private_key: PrivateKey) -> bool:
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"""
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Creates a private key.
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:param private_key: Instance of the PrivateKey object
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:return: the result of whether the creation was successful
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"""
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try:
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sql = (f"INSERT INTO {TAB_PRIVATE_KEYS} "
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f"({COL_PRIVATE_KEY},"
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f"{COL_PASSWORD}) "
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f"VALUES(?,?)")
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values = [private_key.private_key,
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private_key.password]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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print(e)
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return False
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return True
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def read(self, private_key_id: int):
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"""
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Reads (selects) a private key.
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:param private_key_id: ID of specific private key
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:return: instance of the PrivateKey object
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"""
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try:
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sql = (f"SELECT * FROM {TAB_PRIVATE_KEYS} "
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f"WHERE {COL_ID} = ?")
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values = [private_key_id]
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self.cursor.execute(sql, values)
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private_key_row = self.cursor.fetchall()
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private_key: PrivateKey = PrivateKey(private_key_row[0],
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private_key_row[1],
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private_key_row[2])
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except Error as e:
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print(e)
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return None
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return private_key
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def update(self, private_key_id: int, private_key: PrivateKey) -> bool:
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"""
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Updates a private key.
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:param private_key_id: ID of specific private key
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:param private_key: Instance of the PrivateKey object
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:return: the result of whether the updation was successful
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"""
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try:
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sql = (f"UPDATE {TAB_PRIVATE_KEYS} "
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f"SET {COL_PRIVATE_KEY} = ?, "
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f"{COL_PASSWORD} = ? "
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f"WHERE {COL_ID} = ?")
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values = [private_key.private_key,
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private_key.password]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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print(e)
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return False
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return True
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def delete(self, private_key_id: int) -> bool:
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"""
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Deletes a private key
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:param private_key_id: ID of specific private key
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:return: the result of whether the deletion was successful
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"""
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try:
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sql = (f"DELETE FROM {TAB_PRIVATE_KEYS} "
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f"WHERE {COL_ID} = ?")
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values = [private_key_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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print(e)
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return False
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return True
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