letsswing_admin/main.py

from nicegui import ui 
import sqlite3
import signal
import os




def dict_factory(cursor, row):
    d = {}
    for idx, col in enumerate(cursor.description):
        d[col[0]] = row[idx]
    return d

def read_data(query):
    try:
        cursor.execute(query)
        rows = cursor.fetchall()
        return rows
    except sqlite3.Error as e:
        ui.notify("{e}")
        return None

def registra_presenza(id, flag):
    
    try:
        cursor.execute("UPDATE users SET presenze = ? WHERE id = ?", (1 if flag==True  else 0, id) ) 
        conn.commit()
        
    finally:
        tabellaUtenti.refresh()
        os.kill(os.getpid(), signal.SIGUSR1)

@ui.refreshable
def tabellaUtenti():
    rows = read_data("SELECT u.*, (SELECT data FROM pagamenti WHERE user_id=u.id AND date(data) = '2021-05-31' ORDER BY id DESC LIMIT 1) as pagamenti FROM users as u;")
    for row in rows:
        with ui.row().classes("w-full"):
            with ui.column().classes("grow"):
                ui.label(f"{row['nome']} {row['cognome'][0].upper()}.").style('color:'+("black" if row['pagamenti'] else "red"))
            with ui.column():
                if row["presenze"] == 1:
                    ui.button(color="primary", text= "presente", on_click= lambda: registra_presenza(row["id"], False))
                else:
                    ui.button(color="secondary", text= "assente", on_click= lambda: registra_presenza(row["id"], True))

        ui.separator()  

def onSignal(signum, frame):
    tabellaUtenti.refresh()

signal.signal(signal.SIGUSR1, onSignal)

# START

conn = sqlite3.connect('letsswing.db')
conn.row_factory = dict_factory
cursor = conn.cursor()



with ui.row().classes("w-full"):
    with ui.column().classes("grow"):
        ui.label("Beginner a matera")
    with ui.column():
        ui.icon("thumb_up")    

tabellaUtenti()


ui.run(host="0.0.0.0")