76 lines
3 KiB
Python
76 lines
3 KiB
Python
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import sqlite3
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import pathlib
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import uuid
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class Database:
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def __init__(self, filename=None):
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filename = filename or pathlib.Path(__file__).parent.parent.absolute() / "database.sqlite3"
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self._con = sqlite3.connect(filename)
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self.migrate()
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def _execute(self, query, parameters=None):
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cur = self.getCursor()
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cur.execute(query, parameters)
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self.commit()
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def commit(self):
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return self._con.commit()
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def getCursor(self):
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return self._con.cursor()
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def getVersion(self):
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cur = self.getCursor()
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try:
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cur.execute("SELECT value FROM contentmonster_settings WHERE key = 'dbversion'")
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assert (version := cur.fetchone())
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return int(version[0])
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except (sqlite3.OperationalError, AssertionError):
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return 0
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def getFileUUID(self, fileobj):
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hash = fileobj.getHash()
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cur = self.getCursor()
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cur.execute("SELECT uuid, checksum FROM contentmonster_file WHERE directory = ? AND name = ?", (fileobj.directory.name, fileobj.name))
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fileuuid = None
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for result in cur.fetchall():
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if result[1] == hash:
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fileuuid = result[0]
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else:
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self.removeFileByUUID(result[0])
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return fileuuid or self.addFile(fileobj, hash)
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def addFile(self, fileobj, hash=None):
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hash = hash or fileobj.getHash()
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fileuuid = str(uuid.uuid4())
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self._execute("INSERT INTO contentmonster_file(uuid, directory, name, checksum) VALUES (?, ?, ?, ?)", (fileuuid, fileobj.directory.name, fileobj.name, hash))
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return fileuuid
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def removeFileByUUID(self, fileuuid):
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self._execute("DELETE FROM contentmonster_file WHERE uuid = ?", (fileuuid,))
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def logStart(self, file, vessel):
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self._execute("INSERT INTO contentmonster_file_log(file, vessel, status) VALUES(?, ?, ?)", (file.uuid, vessel.name, False))
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def logCompletion(self, file, vessel):
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self._execute("UPDATE contentmonster_file_log SET status = ? WHERE file = ? AND vessel = ?", (True, file.uuid, vessel.name))
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def migrate(self):
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cur = self.getCursor()
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if self.getVersion() == 0:
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cur.execute("CREATE TABLE IF NOT EXISTS contentmonster_settings(key VARCHAR(64) PRIMARY KEY, value TEXT)")
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cur.execute("INSERT INTO contentmonster_settings(key, value) VALUES ('dbversion', '1')")
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self.commit()
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if self.getVersion() == 1:
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cur.execute("CREATE TABLE IF NOT EXISTS contentmonster_file(uuid VARCHAR(36) PRIMARY KEY, directory VARCHAR(128), name VARCHAR(128), checksum VARCHAR(64))")
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cur.execute("CREATE TABLE IF NOT EXISTS contentmonster_file_log(file VARCHAR(36), vessel VARCHAR(128), status BOOLEAN, PRIMARY KEY (file, vessel), FOREIGN KEY (file) REFERENCES contentmonster_files(uuid) ON DELETE CASCADE)")
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cur.execute("UPDATE contentmonster_settings SET value = '2' WHERE key = 'dbversion'")
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self.commit()
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def __del__(self):
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self._con.close()
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