matekasse/Website/db.py

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from re import M
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import sqlite3
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from datetime import datetime
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import click
from flask import current_app, g
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def log(statement, user_id, before, after, change):
db = get_db()
c = db.cursor()
c.execute("INSERT INTO transaction_log (timestamp, type, user_id, before, after, change) VALUES (?, ?, ?, ?, ?, ?)", [datetime.now(), statement, user_id, before, after, change])
db.commit()
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def add_user(after):
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db = get_db()
c = db.cursor()
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c.execute("INSERT or IGNORE INTO users (username, balance) VALUES (?, 0)", [after])
user_id = c.lastrowid
log("add_user", user_id=user_id, after=after)
db.commit()
def remove_user(user_id):
db = get_db()
c = db.cursor()
c.execute("SELECT * FROM users WHERE id = ?", [user_id])
user_name = c.fetchone()[1]
c.execute("SELECT * FROM tags WHERE userid = ?", [user_id])
for tag in c.fetchall():
remove_tag(tag[0])
c.execute("DELETE FROM users WHERE id = ?", [user_id])
log("remove_user", user_id=user_id, before=user_name)
db.commit()
def add_tag(user_id, tag_id):
db = get_db()
c = db.cursor()
c.execute("INSERT OR IGNORE INTO tags (tagid, userid) VALUES ?, ?)", [tag_id, user_id])
db.commit()
log("addtag", after=tag_id, user_id=user_id)
def remove_tag(tag_id):
db = get_db()
c = db.cursor()
c.execute("SELECT * FROM tags WHERE tagid = ?", [tag_id])
user_id = c.fetchone()[1]
c.execute("DELETE FROM tags WHERE tagid = ?", [tag_id])
log("removetag", before=tag_id, user_id=user_id)
db.commit()
def change_balance(user_id, change):
db = get_db()
c = db.cursor()
c.execute("UPDATE users SET balance = balance + ? WHERE id=?", [change, user_id])
log("balance", user_id=user_id, change=change)
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db.commit()
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def get_db():
if 'db' not in g:
g.db = sqlite3.connect(
current_app.config['DATABASE'],
detect_types=sqlite3.PARSE_DECLTYPES
)
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g.db.row_factory = sqlite3.Row
init_db()
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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')
def init_db_command():
"""Clear the existing data and create new tables."""
init_db()
click.echo('Initialized the database.')