97 lines
2.4 KiB
Python
Executable File
97 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python
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from flask import g
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import os
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import sqlite3
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from typing import Optional
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def get() -> sqlite3.Connection:
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if 'db' not in g:
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g.db = sqlite3.connect(
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os.environ.get('DATABASE_PATH', 'db.sqlite'),
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detect_types=sqlite3.PARSE_DECLTYPES,
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)
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g.db.row_factory = sqlite3.Row
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return g.db
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def init(db):
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with open('schema.sql', 'r') as f:
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db.executescript(f.read())
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def close():
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db = g.pop('db', None)
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if db is not None:
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db.close()
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def init_app(app):
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app.teardown_appcontext(close)
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app.cli.add_command(init)
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if __name__ == '__main__':
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db = sqlite3.connect(
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os.environ.get('DATABASE_PATH', 'db.sqlite'),
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detect_types=sqlite3.PARSE_DECLTYPES,
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)
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db.row_factory = sqlite3.Row
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init(db)
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class Object:
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@staticmethod
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def select_args() -> str:
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return 'id, name, calibrated'
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def __init__(self, object_id: int, name: str, calibrated: int):
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self.id = object_id
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self.name = name
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# 0 means no data available
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# 1 means data available but calibration not done
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# 2 means calibration done
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self.calibrated = calibrated
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@staticmethod
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def create(name: str, db: sqlite3.Connection) -> 'Object':
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cur = db.cursor()
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response = cur.execute(
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'INSERT INTO object(name, calibrated) VALUES (?, ?) RETURNING ' + Object.select_args() + ';',
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[name, 0]
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)
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return response.fetchone()
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def save(self, db: sqlite3.Connection):
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cur = db.cursor()
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cur.execute(
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'UPDATE object SET name = ? WHERE id = ?',
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[self.name, self.id]
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)
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@staticmethod
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def from_row(row: sqlite3.Row) -> 'Object':
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return Object(*row)
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@staticmethod
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def get_from_id(object_id: int, db: sqlite3.Connection) -> Optional['Object']:
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cur = db.cursor()
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response = cur.execute(
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'SELECT ' + Object.select_args() + ' FROM object WHERE id = ?;',
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[object_id]
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)
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return Object.from_row(response.fetchone())
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@staticmethod
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def all(db: sqlite3.Connection) -> list['Object']:
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cur = db.cursor()
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response = cur.execute(
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'SELECT ' + Object.select_args() + ' FROM object;',
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[]
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)
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return list(map(Object.from_row, response.fetchall()))
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