nfsw/db.py


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# -*- coding: utf-8 -*-
#
#   SPDX-License-Identifier: ISC
#
#   Copyright (C) 2019 rsiddharth <s@ricketyspace.net>
#
#   This file is part of nfsw.
#

import sqlite3

import click

from flask import current_app, g
from flask.cli import with_appcontext


def get_db():
    if 'db' in g:
        return g.db

    g.db = sqlite3.connect(
        current_app.config['DATABASE'],
        detect_types=sqlite3.PARSE_DECLTYPES
    )
    g.db.row_factory = sqlite3.Row

    return g.db


def close_db(e=None):
    db = g.pop('db', None)

    if db is not None:
        db.close()


def init_db():
    db = get_db()

    with current_app.open_resource('schema.sql') as f:
        db.executescript(f.read().decode('utf8'))


@click.command('init-db')
@with_appcontext
def init_db_command():
    """Clear database and freshly create tables"""
    init_db()
    click.echo('Freshly provisioned database.')


def init_app(app):
    app.teardown_appcontext(close_db)
    app.cli.add_command(init_db_command)