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Merge branch 'master' into styling

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This commit is contained in:
Alexander Malzkuhn 2025-06-04 06:27:03 +02:00
commit 0ebf563f21
32 changed files with 149 additions and 463 deletions
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3
.gitignore vendored
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@ -4,3 +4,6 @@
.venv
users/
backup/
Archiv/
Docker/
docker-work/

3
.idea/.gitignore generated vendored
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@ -1,3 +0,0 @@
# Default ignored files
/shelf/
/workspace.xml

10
.idea/Zeiterfassung.iml generated
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@ -1,10 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<module type="PYTHON_MODULE" version="4">
<component name="NewModuleRootManager">
<content url="file://$MODULE_DIR$">
<excludeFolder url="file://$MODULE_DIR$/.venv" />
</content>
<orderEntry type="jdk" jdkName="Python 3.11 (Zeiterfassung)" jdkType="Python SDK" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

6
.idea/inspectionProfiles/profiles_settings.xml generated
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@ -1,6 +0,0 @@
<component name="InspectionProjectProfileManager">
<settings>
<option name="USE_PROJECT_PROFILE" value="false" />
<version value="1.0" />
</settings>
</component>

7
.idea/misc.xml generated
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@ -1,7 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="Black">
<option name="sdkName" value="Python 3.11" />
</component>
<component name="ProjectRootManager" version="2" project-jdk-name="Python 3.11 (Zeiterfassung)" project-jdk-type="Python SDK" />
</project>

8
.idea/modules.xml generated
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@ -1,8 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/.idea/Zeiterfassung.iml" filepath="$PROJECT_DIR$/.idea/Zeiterfassung.iml" />
</modules>
</component>
</project>

6
.idea/vcs.xml generated
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@ -1,6 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="" vcs="Git" />
</component>
</project>

24
Dockerfile Normal file
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@ -0,0 +1,24 @@
FROM debian:latest
RUN apt update && apt upgrade -y
RUN apt install python3 python3-pip python3.11-venv locales -y
RUN mkdir /app
RUN mkdir /.venv
RUN mkdir /backup
RUN mkdir /settings
RUN python3 -m venv /.venv
RUN /.venv/bin/pip install nicegui
RUN /.venv/bin/pip install segno
RUN /.venv/bin/pip install python-dateutil
RUN sed -i '/de_DE.UTF-8/s/^# //g' /etc/locale.gen && \
locale-gen
ENV LANG de_DE.UTF-8
ENV LANGUAGE de_DE:de
ENV LC_ALL de_DE.UTF-8
COPY main.py /app/main.py
COPY favicon.svg /app/favicon.svg
COPY lib /app/lib/
EXPOSE 8090
ENTRYPOINT ["/.venv/bin/python", "/app/main.py"]
#ENTRYPOINT exec /app/.venv/bin/python /app/main.py --docker

BIN
__pycache__/zeiterfassung.cpython-38.pyc
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11
docker-compose.yml Normal file
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@ -0,0 +1,11 @@
services:
test:
image: test:0
restart: always
ports:
- 8090:8090
volumes:
#- /home/alexander/Dokumente/Python/Zeiterfassung:/app
- /home/alexander/Dokumente/Python/Zeiterfassung/docker-work/users:/users
- /home/alexander/Dokumente/Python/Zeiterfassung/docker-work/backup:/backup
- /home/alexander/Dokumente/Python/Zeiterfassung/docker-work/settings:/settings

81
lib/admin.py
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@ -1,7 +1,6 @@
from datetime import datetime
import dateutil.easter
from PIL.SpiderImagePlugin import isInt
from dateutil.easter import *
from nicegui import ui, app, events
@ -45,6 +44,14 @@ def page_admin():
updates_available = ValueBinder()
updates_available.value = False
enabled_because_not_docker = ValueBinder
if is_docker():
enabled_because_not_docker.value = False
scriptpath = "/app"
backupfolder = "/backup"
else:
enabled_because_not_docker.value = True
with ui.tabs() as tabs:
time_overview = ui.tab('Zeitdaten')
@ -739,30 +746,6 @@ Dies kann nicht rückgängig gemacht werden!''')
with ui.card():
ui.markdown("**Administrationsbenutzer:**")
with ui.grid(columns=2):
def save_admin_settings():
write_adminsetting("admin_user", admin_user.value)
if admin_password.value != "":
write_adminsetting("admin_password", hash_password(admin_password.value))
else:
write_adminsetting("admin_password", data["admin_password"])
write_adminsetting("port", port.value)
write_adminsetting("secret", secret)
write_adminsetting("touchscreen", touchscreen_switch.value)
write_adminsetting("times_on_touchscreen", timestamp_switch.value)
write_adminsetting("photos_on_touchscreen", photo_switch.value)
write_adminsetting("picture_height", picture_height_input.value)
write_adminsetting("button_height", button_height_input.value)
write_adminsetting("user_notes", notes_switch.value)
write_adminsetting("holidays", data["holidays"])
write_adminsetting("vacation_application", va_switch.value)
if int(old_port) != int(port.value):
with ui.dialog() as dialog, ui.card():
ui.markdown("Damit die Porteinstellungen wirksam werden, muss der Server neu gestartet werden.")
ui.button("OK", on_click=lambda: dialog.close())
dialog.open()
ui.notify("Einstellungen gespeichert")
timetable.refresh()
ui.markdown("Benutzername des Adminstrators")
admin_user = ui.input().tooltip("Geben Sie hier den Benutzernamen für den Adminstationsnutzer ein")
@ -784,7 +767,9 @@ Dies kann nicht rückgängig gemacht werden!''')
ui.markdown("Port:")
port = ui.input(validation={"Nur ganzzahlige Portnummern erlaubt": lambda value: check_is_number(value),
"Portnummer zu klein": lambda value: len(value)>=2}).tooltip("Geben Sie hier die Portnummer ein, unter der die Zeiterfassung erreichbar ist.").props('size=5')
"Portnummer zu klein": lambda value: len(value)>=2}).tooltip("Geben Sie hier die Portnummer ein, unter der die Zeiterfassung erreichbar ist.").props('size=5').bind_enabled_from(enabled_because_not_docker, 'value')
if is_docker():
port.tooltip("Diese Einstellung ist beim Einsatz von Docker deaktiviert.")
old_port = data["port"]
port.value = old_port
@ -826,12 +811,12 @@ Dies kann nicht rückgängig gemacht werden!''')
ui.markdown("**Einstellungen für Benutzerfrontend**")
notes_switch = ui.switch("Notizfunktion aktiviert", value=data["user_notes"])
va_switch = ui.switch("Urlaubsanträge", value=data["vacation_application"])
reset_visibility = ValueBinder()
def holiday_section():
with ui.card():
ui.markdown('**Feiertage:**')
reset_visibility = ValueBinder()
reset_visibility.value = False
def new_holiday_entry():
@ -1031,6 +1016,33 @@ Dies kann nicht rückgängig gemacht werden!''')
holiday_section()
def save_admin_settings():
write_adminsetting("admin_user", admin_user.value)
if admin_password.value != "":
write_adminsetting("admin_password", hash_password(admin_password.value))
else:
write_adminsetting("admin_password", data["admin_password"])
write_adminsetting("port", port.value)
write_adminsetting("secret", secret)
write_adminsetting("touchscreen", touchscreen_switch.value)
write_adminsetting("times_on_touchscreen", timestamp_switch.value)
write_adminsetting("photos_on_touchscreen", photo_switch.value)
write_adminsetting("picture_height", picture_height_input.value)
write_adminsetting("button_height", button_height_input.value)
write_adminsetting("user_notes", notes_switch.value)
write_adminsetting("holidays", data["holidays"])
write_adminsetting("vacation_application", va_switch.value)
if int(old_port) != int(port.value):
with ui.dialog() as dialog, ui.card():
ui.markdown(
"Damit die Porteinstellungen wirksam werden, muss der Server neu gestartet werden.")
ui.button("OK", on_click=lambda: dialog.close())
dialog.open()
ui.notify("Einstellungen gespeichert")
reset_visibility.value = False
timetable.refresh()
ui.button("Speichern", on_click=save_admin_settings).tooltip("Hiermit werden sämtliche oben gemachten Einstellungen gespeichert.")
with ui.tab_panel(users):
@ -1393,7 +1405,7 @@ Dies kann nicht rückgängig gemacht werden!''')
ui.label("Backupeinstellungen").classes('font-bold')
with ui.grid(columns='auto auto auto'):
ui.markdown("Backupordner:")
backupfolder_input = ui.input(value=backupfolder).props(f"size={len(backupfolder)}")
backupfolder_input = ui.input(value=backupfolder).props(f"size={len(backupfolder)}").bind_enabled_from(enabled_because_not_docker, 'value')
def save_new_folder_name():
if os.path.exists(backupfolder_input.value):
write_adminsetting("backup_folder", backupfolder_input.value)
@ -1405,7 +1417,9 @@ Dies kann nicht rückgängig gemacht werden!''')
ui.label("exisitiert nicht und kann daher nicht verwendet werden.")
ui.button("OK", on_click=dialog.close)
dialog.open()
ui.button("Speichern", on_click=save_new_folder_name).tooltip("Hiermit können Sie das Backupverzeichnis ändeern")
save_backup_folder_button = ui.button("Speichern", on_click=save_new_folder_name).tooltip("Hiermit können Sie das Backupverzeichnis ändeern").bind_enabled_from(enabled_because_not_docker, 'value')
if is_docker():
save_backup_folder_button.tooltip("Diese Einstellung ist beim Einsatz von Docker deaktiviert.")
ui.markdown("API-Schlüssel:")
backup_api_key_input = ui.input(value=api_key).tooltip("Hier den API-Schlüssel eintragen, der für Backuperzeugung mittels API-Aufruf verwendet werden soll.")
@ -1465,7 +1479,10 @@ Dies kann nicht rückgängig gemacht werden!''')
except ValueError:
button_string = date_string
ui.markdown(button_string)
ui.markdown(f'{round(size/1_000_000,2)} MB')
if size > 1_000_000:
ui.markdown(f'{round(size/1_000_000,2)} MB')
else:
ui.markdown(f'{round(size / 1_000, 2)} kB')
ui.markdown(version)
ui.button(icon='download', on_click=lambda file=date_string: ui.download.file(
os.path.join(scriptpath, backupfolder, f'{file}.zip'))).tooltip(
@ -1526,7 +1543,7 @@ Dies kann nicht rückgängig gemacht werden!''')
for file in files:
add = os.path.join(root, file)
target.write(add)
target.write(usersettingsfilename)
target.write(os.path.join(scriptpath, usersettingsfilename), arcname=usersettingsfilename)
target.writestr("app_version.txt", data=app_version)
backup_list.refresh()
n.dismiss()

17
lib/definitions.py
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@ -6,12 +6,21 @@ from pathlib import Path
import hashlib
app_title = "Zeiterfassung"
app_version = ("0.0.0")
app_version = "0.0.0"
# Standardpfade
scriptpath = str(Path(os.path.dirname(os.path.abspath(__file__))).parent.absolute())
def is_docker():
cgroup = Path('/proc/self/cgroup')
return Path('/.dockerenv').is_file() or (cgroup.is_file() and 'docker' in cgroup.read_text())
if is_docker():
scriptpath = "/settings"
backupfolder = "/backup"
else:
scriptpath = str(Path(os.path.dirname(os.path.abspath(__file__))).parent.absolute())
backupfolder = str(os.path.join(scriptpath, "backup"))
userfolder = "users"
backupfolder = str(os.path.join(scriptpath, "backup"))
# Dateinamen
@ -37,7 +46,7 @@ standard_adminsettings = { "admin_user": "admin",
"button_height": 300,
"user_notes": True,
"vacation_application": True,
"backupfolder": backupfolder,
"backup_folder": backupfolder,
"backup_api_key": hashlib.shake_256(bytes(backupfolder, 'utf-8')).hexdigest(20),
"holidays": { }
}

26
lib/homepage.py
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@ -199,6 +199,7 @@ def homepage():
overviews = ui.tab('Übersichten')
absence = ui.tab('Urlaubsantrag')
absence.set_visibility(load_adminsettings()["vacation_application"])
pw_change = ui.tab("Passwort")
with ui.grid(columns='1fr auto 1fr').classes('w-full items-center'):
ui.space()
@ -281,6 +282,31 @@ def homepage():
ui.button("Zurückziehen", on_click=retract_va).tooltip("Hiermit wird der oben gewählte Urlaubsantrag zurückgezogen.").classes('w-full')
open_vacation_applications()
with ui.tab_panel(pw_change):
ui.label("Passwort ändern").classes('font-bold')
with ui.grid(columns='auto auto').classes('items-end'):
ui.label("Altes Passwort:")
old_pw_input = ui.input(password=True)
ui.label("Neues Passwort:")
new_pw_input = ui.input(password=True)
ui.label("Neues Passwort bestätigen:")
new_pw_confirm_input = ui.input(password=True)
def revert_pw_inputs():
old_pw_input.value = ""
new_pw_input.value = ""
new_pw_confirm_input.value = ""
def save_new_password():
if hash_password(old_pw_input.value) == current_user.password:
if new_pw_input.value == new_pw_confirm_input.value:
current_user.password = hash_password(new_pw_input.value)
current_user.write_settings()
ui.notify("Neues Passwort gespeichert")
else:
ui.notify("Passwortbestätigung stimmt nicht überein")
else:
ui.notify("Altes Passwort nicht korrekt")
ui.button("Speichern", on_click=save_new_password)
ui.button("Zurücksetzen", on_click=revert_pw_inputs)
ui.space()
else:

13
lib/settings.json
View File

@ -1,13 +0,0 @@
{
"admin_user": "admin",
"admin_password": "8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918",
"port": "8090",
"secret": "ftgzuhjikg,mt5jn46uzer8sfi9okrmtzjhndfierko5zltjhdgise",
"times_on_touchscreen": true,
"photos_on_touchscreen": true,
"touchscreen": true,
"picure_height": 200,
"button_height": 300,
"user_notes": true,
"holidays": {}
}

21
lib/users.py
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@ -14,25 +14,26 @@ import shutil
import re
from lib.definitions import userfolder, scriptpath, usersettingsfilename, photofilename, status_in, status_out, \
standard_adminsettings, standard_usersettings, va_file
standard_adminsettings, standard_usersettings, va_file, is_docker
# Benutzerklasse
class user:
def __init__(self, name):
self.userfolder = os.path.join(scriptpath, userfolder, name)
if not is_docker():
self.userfolder = os.path.join(scriptpath, userfolder, name)
else:
self.userfolder = os.path.join("/users", name)
self.settingsfile = os.path.join(self.userfolder, usersettingsfilename)
self.photofile = os.path.join(self.userfolder, photofilename)
# Stammdaten einlesen
try:
with open(self.settingsfile) as json_file:
#try:
with open(self.settingsfile) as json_file:
data = json.load(json_file)
except:
print("Fehler beim Erstellen des Datenarrays.")
#Hier muss noch Fehlerbehandlungcode hin
#except:
# print("Fehler beim Erstellen des Datenarrays.")
# #TODO Hier muss noch Fehlerbehandlungcode hin
self.password = data["password"]
self.workhours = data["workhours"]
@ -301,10 +302,8 @@ class user:
return { }
def write_notes(self, year, month, day, note_dict):
print(os.path.join(self.userfolder, f"{int(year)}-{int(month)}.json"))
with open(os.path.join(self.userfolder, f"{int(year)}-{int(month)}.json"), "r") as json_file:
json_data = json.load(json_file)
print(json_data)
if len(note_dict) == 1:
user_info = list(note_dict)[0]
json_data["notes"][str(day)] = { }

13
zeiterfassung.py → main.py
View File

@ -15,8 +15,7 @@ import argparse
from lib.web_ui import hash_password
class Commandline_Header:
def commandline_header():
message_string = f"{app_title} {app_version}"
underline = ""
for i in range(len(message_string)):
@ -37,8 +36,7 @@ def main():
def startup_message():
Commandline_Header()
commandline_header()
url_string = ""
for i in list(app.urls):
url_string += f"{i}, "
@ -60,8 +58,13 @@ if __name__ in ("__main__", "__mp_main__"):
parser = argparse.ArgumentParser(description=f'{app_title} {app_version}')
parser.add_argument('--admin-access', help='Zugangsdaten für Administrator einstellen', action="store_true")
args = parser.parse_args()
if is_docker():
scriptpath = "/app"
backupfolder = "/backup"
if args.admin_access:
Commandline_Header()
commandline_header()
print("Lade Administrationseinstellungen")
admin_settings = load_adminsettings()
print("Geben Sie den neuen Benutzernamen für den Administrationsbenutzer an:")

23
playgound.py
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@ -1,23 +0,0 @@
import json
import urllib.request
from nicegui import ui, app
import segno
@app.get("/data")
async def deliver_data():
with open("settings.json") as json_file:
data = json.load(json_file)
return data
string = ""
for i in range(1000):
string += str(i)
qr_code = segno.make_qr(string).svg_data_uri()
#qr_code.save("qr_code.png", scale=5, border=0)
ui.image(qr_code)
ui.run(language="de-DE", port=9000)

163
qr_scanner.py
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@ -1,163 +0,0 @@
#!/usr/bin/env python3
import base64
import signal
import time
import argparse
import requests
import cv2
import numpy as np
from fastapi import Response
from playsound3 import playsound
from definitions import app_title, app_version
from nicegui import Client, app, core, run, ui
class Commandline_Header:
message_string = f"{app_title} {app_version}"
underline = ""
for i in range(len(message_string)):
underline += "-"
print(message_string)
print(underline)
def visual_interface(port=9000):
# In case you don't have a webcam, this will provide a black placeholder image.
black_1px = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAA1JREFUGFdjYGBg+A8AAQQBAHAgZQsAAAAASUVORK5CYII='
placeholder = Response(content=base64.b64decode(black_1px.encode('ascii')), media_type='image/png')
global convert
def convert(frame: np.ndarray) -> bytes:
"""Converts a frame from OpenCV to a JPEG image.
This is a free function (not in a class or inner-function),
to allow run.cpu_bound to pickle it and send it to a separate process.
"""
_, imencode_image = cv2.imencode('.jpg', frame)
return imencode_image.tobytes()
global setup
def setup() -> None:
url_string = ""
for i in list(app.urls):
url_string += f"{i}, "
url_string = url_string[0:-2]
print("Weboberfläche erreichbar unter: " + url_string)
# OpenCV is used to access the webcam.
video_capture = cv2.VideoCapture(0)
detector = cv2.QRCodeDetector()
blocker = False
blockset = 0
@app.get('/video/frame')
# Thanks to FastAPI's `app.get` it is easy to create a web route which always provides the latest image from OpenCV.
async def grab_video_frame() -> Response:
nonlocal blocker
if time.time() - blockset > 5:
blocker = False
if not video_capture.isOpened():
return placeholder
# The `video_capture.read` call is a blocking function.
# So we run it in a separate thread (default executor) to avoid blocking the event loop.
_, frame = await run.io_bound(video_capture.read)
if frame is None:
return placeholder
# `convert` is a CPU-intensive function, so we run it in a separate process to avoid blocking the event loop and GIL.
jpeg = await run.cpu_bound(convert, frame)
# QR-Handling
def function_call():
r = requests.get(str(a))
print(r.content())
print("Inside Function_call")
#b = webbrowser.open(str(a))
if r.status_code == 200:
print('Erkannt')
if r.json()["stampstatus"]:
playsound('ui-on.mp3')
elif not r.json()["stampstatus"]:
playsound('ui-off.mp3')
else:
playsound('ui-sound.mp3')
nonlocal blocker
nonlocal blockset
blocker = True
blockset = time.time()
if not blocker:
_, img = video_capture.read()
# detect and decode
data, bbox, _ = detector.detectAndDecode(img)
# check if there is a QRCode in the image
if data:
a = data
function_call()
# cv2.imshow("QRCODEscanner", img)
if cv2.waitKey(1) == ord("q"):
function_call()
return Response(content=jpeg, media_type='image/jpeg')
# For non-flickering image updates and automatic bandwidth adaptation an interactive image is much better than `ui.image()`.
video_image = ui.interactive_image().classes('w-full h-full')
# A timer constantly updates the source of the image.
# Because data from same paths is cached by the browser,
# we must force an update by adding the current timestamp to the source.
ui.timer(interval=0.1, callback=lambda: video_image.set_source(f'/video/frame?{time.time()}'))
async def disconnect() -> None:
"""Disconnect all clients from current running server."""
for client_id in Client.instances:
await core.sio.disconnect(client_id)
def handle_sigint(signum, frame) -> None:
# `disconnect` is async, so it must be called from the event loop; we use `ui.timer` to do so.
ui.timer(0.1, disconnect, once=True)
# Delay the default handler to allow the disconnect to complete.
ui.timer(1, lambda: signal.default_int_handler(signum, frame), once=True)
async def cleanup() -> None:
# This prevents ugly stack traces when auto-reloading on code change,
# because otherwise disconnected clients try to reconnect to the newly started server.
await disconnect()
# Release the webcam hardware so it can be used by other applications again.
video_capture.release()
app.on_shutdown(cleanup)
# We also need to disconnect clients when the app is stopped with Ctrl+C,
# because otherwise they will keep requesting images which lead to unfinished subprocesses blocking the shutdown.
signal.signal(signal.SIGINT, handle_sigint)
# All the setup is only done when the server starts. This avoids the webcam being accessed
# by the auto-reload main process (see https://github.com/zauberzeug/nicegui/discussions/2321).
app.on_startup(setup)
ui.run(favicon="favicon.svg", port=port, language='de-DE', show_welcome_message=False)
if __name__ in ("__main__", "__mp_main__"):
parser = argparse.ArgumentParser(description=f'{app_title}-QR-Scanner {app_version}')
parser.add_argument('--webgui', help='Web-GUI starten', action="store_true")
parser.add_argument('-p', help="Port, über den die Weboberfläche erreichbar ist")
args = parser.parse_args()
Commandline_Header()
print("QR-Scanner")
if args.webgui:
try:
port = int(args.p)
except:
port = False
if not port == False:
visual_interface(port)
else:
print("Ungültiger Port")
print("Beende")
quit()

22
qr_scanner_example.py
View File

@ -1,22 +0,0 @@
import cv2
import webbrowser
cap = cv2.VideoCapture(0)
# initialize the cv2 QRCode detector
detector = cv2.QRCodeDetector()
while True:
_, img = cap.read()
# detect and decode
data, bbox, _ = detector.detectAndDecode(img)
# check if there is a QRCode in the image
if data:
a = data
break
cv2.imshow("QRCODEscanner", img)
if cv2.waitKey(1) == ord("q"):
break
b = webbrowser.open(str(a))
cap.release()
cv2.destroyAllWindows()

3
settings.json
View File

@ -73,6 +73,7 @@
"2030-10-30": "Reformationstag",
"2030-12-25": "1. Weihnachtsfeiertag",
"2030-12-26": "2. Weihnachtsfeiertag",
"2025-06-11": "Testeintrag"
"2025-06-11": "Testeintrag",
"2025-05-31": "Testeintrag"
}
}

12
settings.json_bak
View File

@ -1,12 +0,0 @@
{
"admin_user": "admin",
"admin_password": "8d969eef6ecad3c29a3a629280e686cf0c3f5d5a86aff3ca12020c923adc6c92",
"port": "8090",
"secret": "ftgzuhjikg,mt5jn46uzer8sfi9okrmtzjhndfierko5zltjhdgise",
"holidays": {
"2024-05-01": "Tag der Arbeit",
"2024-12-25": "1. Weihnachtsfeiertag",
"2025-01-01": "Neujahr",
"2025-05-01": "Tag der Arbeit"
}
}

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sounds/3beeps.mp3
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sounds/beep.mp3
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sounds/power-on.mp3
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sounds/store_beep.mp3
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sounds/success.mp3
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sounds/ui-off.mp3
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22
test.json
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@ -1,22 +0,0 @@
{
"2024-04-01": {
"0": "0",
"1": "8",
"2": "8",
"3": "8",
"4": "8",
"5": "8",
"6": "0",
"vacation": "30"
},
"2024-04-07": {
"0": "0",
"1": "6",
"2": "6",
"3": "6",
"4": "8",
"5": "6",
"6": "0",
"vacation": "28"
}
}

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users/testuser10/2025-5.json
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@ -1,5 +1,6 @@
{
"archived": 0,
"archived": 1,
"total_hours": 0,
"absence": {}
"absence": {},
"overtime": -406441
}

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webcam_example.py
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#!/usr/bin/env python3
import base64
import signal
import time
import webbrowser
import cv2
import numpy as np
from fastapi import Response
from nicegui import Client, app, core, run, ui
# In case you don't have a webcam, this will provide a black placeholder image.
black_1px = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAA1JREFUGFdjYGBg+A8AAQQBAHAgZQsAAAAASUVORK5CYII='
placeholder = Response(content=base64.b64decode(black_1px.encode('ascii')), media_type='image/png')
def convert(frame: np.ndarray) -> bytes:
"""Converts a frame from OpenCV to a JPEG image.
This is a free function (not in a class or inner-function),
to allow run.cpu_bound to pickle it and send it to a separate process.
"""
_, imencode_image = cv2.imencode('.jpg', frame)
return imencode_image.tobytes()
def setup() -> None:
# OpenCV is used to access the webcam.
video_capture = cv2.VideoCapture(0)
detector = cv2.QRCodeDetector()
blocker = False
blockset = 0
@app.get('/video/frame')
# Thanks to FastAPI's `app.get` it is easy to create a web route which always provides the latest image from OpenCV.
async def grab_video_frame() -> Response:
nonlocal blocker
if time.time() - blockset > 5:
blocker = False
if not video_capture.isOpened():
return placeholder
# The `video_capture.read` call is a blocking function.
# So we run it in a separate thread (default executor) to avoid blocking the event loop.
_, frame = await run.io_bound(video_capture.read)
if frame is None:
return placeholder
# `convert` is a CPU-intensive function, so we run it in a separate process to avoid blocking the event loop and GIL.
jpeg = await run.cpu_bound(convert, frame)
# QR-Handling
def function_call():
b = webbrowser.open(str(a))
print('\a')
nonlocal blocker
nonlocal blockset
blocker = True
blockset = time.time()
if not blocker:
_, img = video_capture.read()
# detect and decode
data, bbox, _ = detector.detectAndDecode(img)
# check if there is a QRCode in the image
if data:
a = data
function_call()
# cv2.imshow("QRCODEscanner", img)
if cv2.waitKey(1) == ord("q"):
function_call()
return Response(content=jpeg, media_type='image/jpeg')
# For non-flickering image updates and automatic bandwidth adaptation an interactive image is much better than `ui.image()`.
video_image = ui.interactive_image().classes('w-full h-full')
# A timer constantly updates the source of the image.
# Because data from same paths is cached by the browser,
# we must force an update by adding the current timestamp to the source.
ui.timer(interval=0.1, callback=lambda: video_image.set_source(f'/video/frame?{time.time()}'))
async def disconnect() -> None:
"""Disconnect all clients from current running server."""
for client_id in Client.instances:
await core.sio.disconnect(client_id)
def handle_sigint(signum, frame) -> None:
# `disconnect` is async, so it must be called from the event loop; we use `ui.timer` to do so.
ui.timer(0.1, disconnect, once=True)
# Delay the default handler to allow the disconnect to complete.
ui.timer(1, lambda: signal.default_int_handler(signum, frame), once=True)
async def cleanup() -> None:
# This prevents ugly stack traces when auto-reloading on code change,
# because otherwise disconnected clients try to reconnect to the newly started server.
await disconnect()
# Release the webcam hardware so it can be used by other applications again.
video_capture.release()
app.on_shutdown(cleanup)
# We also need to disconnect clients when the app is stopped with Ctrl+C,
# because otherwise they will keep requesting images which lead to unfinished subprocesses blocking the shutdown.
signal.signal(signal.SIGINT, handle_sigint)
# All the setup is only done when the server starts. This avoids the webcam being accessed
# by the auto-reload main process (see https://github.com/zauberzeug/nicegui/discussions/2321).
app.on_startup(setup)
ui.run(port=9005)