karaoqueue/backend/helpers.py

134 lines
4.7 KiB
Python

import requests
from bs4 import BeautifulSoup
import json
import os
import uuid
from flask import make_response, Flask
from functools import wraps, update_wrapper
from datetime import datetime
import database
data_directory = "data"
config_file = data_directory+"/config.json"
def create_data_directory():
if not os.path.exists(data_directory):
os.makedirs(data_directory)
def get_catalog_url():
r = requests.get('https://www.karafun.de/karaoke-song-list.html')
soup = BeautifulSoup(r.content, 'html.parser')
url = soup.findAll('a', href=True, text='Verfügbar in CSV-Format')[0]['href']
return url
def get_songs(url):
r = requests.get(url)
return r.text
def is_valid_uuid(val):
try:
uuid.UUID(str(val))
return True
except ValueError:
return False
def check_config_exists():
eng = database.get_db_engine()
with eng.connect() as conn:
if conn.dialect.has_table(conn, 'config'):
if (conn.execute("SELECT COUNT(*) FROM config").fetchone()[0] > 0): # type: ignore
return True
else:
return False
else:
return False
def load_version(app: Flask):
if os.environ.get("SOURCE_VERSION"):
app.config['VERSION'] = os.environ.get("SOURCE_VERSION")[0:7] # type: ignore
elif os.path.isfile(".version"):
with open('.version', 'r') as file:
data = file.read().replace('\n', '')
if data:
app.config['VERSION'] = data
else:
app.config['VERSION'] = ""
else:
app.config['VERSION'] = ""
def load_dbconfig(app: Flask):
if os.environ.get("FLASK_ENV") == "development":
app.config['DBCONNSTRING'] = os.environ.get("DBSTRING")
else:
if os.environ.get("DEPLOYMENT_PLATFORM") == "Heroku":
if os.environ.get("JAWSDB_MARIA_URL"):
app.config['DBCONNSTRING'] = os.environ.get("JAWSDB_MARIA_URL")
else:
app.config['DBCONNSTRING'] = ""
if os.environ.get("DEPLOYMENT_PLATFORM") == "Docker":
if os.environ.get("DBSTRING"):
app.config['DBCONNSTRING'] = os.environ.get("DBSTRING")
else:
app.config['DBCONNSTRING'] = ""
elif os.path.isfile(".dbconn"):
with open('.dbconn', 'r') as file:
data = file.read().replace('\n', '')
if data:
app.config['DBCONNSTRING'] = data
else:
app.config['DBCONNSTRING'] = ""
else:
exit("No database connection string found. Cannot continue. Please set the environment variable DBSTRING or create a file .dbconn in the root directory of the project.")
# Check if config exists in DB, if not, create it.
def setup_config(app: Flask):
if check_config_exists():
config = database.get_config_list()
print("Loaded existing config")
else:
config = {'username': 'admin', 'password': 'changeme', 'entryquota': 3, 'maxqueue': 20, 'entries_allowed': 1}
for key, value in config.items():
database.set_config(key, value)
print("Created new config")
app.config['BASIC_AUTH_USERNAME'] = config['username']
app.config['BASIC_AUTH_PASSWORD'] = config['password']
app.config['ENTRY_QUOTA'] = config['entryquota']
app.config['MAX_QUEUE'] = config['maxqueue']
app.config['ENTRIES_ALLOWED'] = bool(config['entries_allowed'])
# set queue admittance
def set_accept_entries(app: Flask, allowed: bool):
if allowed:
app.config['ENTRIES_ALLOWED'] = True
database.set_config('entries_allowed', '1')
else:
app.config['ENTRIES_ALLOWED'] = False
database.set_config('entries_allowed', '0')
# get queue admittance
def get_accept_entries(app: Flask) -> bool:
state = bool(int(database.get_config('entries_allowed')))
app.config['ENTRIES_ALLOWED'] = state
return state
# Write settings from current app.config to DB
def persist_config(app: Flask):
config = {'username': app.config['BASIC_AUTH_USERNAME'], 'password': app.config['BASIC_AUTH_PASSWORD'], 'entryquota': app.config['ENTRY_QUOTA'], 'maxqueue': app.config['MAX_QUEUE']}
for key, value in config.items():
database.set_config(key, value)
def nocache(view):
@wraps(view)
def no_cache(*args, **kwargs):
response = make_response(view(*args, **kwargs))
response.headers['Last-Modified'] = datetime.now() # type: ignore
response.headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=0'
response.headers['Pragma'] = 'no-cache'
response.headers['Expires'] = '-1'
return response
return update_wrapper(no_cache, view)