restructure for backend/frontend separation

backend/app/helpers.py

@@ -0,0 +1,39 @@
+import requests
+from bs4 import BeautifulSoup
+import json
+import os
+
+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='CSV')[0]['href']
+    return url
+
+def get_songs(url):
+    r = requests.get(url)
+    return r.text
+
+def check_config_exists():
+    return os.path.isfile(config_file)
+
+def setup_config(app):
+    if check_config_exists():
+        config = json.load(open(config_file))
+        with open(config_file, 'r') as handle:
+            config = json.load(handle)
+        print("Loaded existing config")
+    else:
+        config = {'username': 'admin', 'password': 'changeme'}
+        with open(config_file, 'w') as handle:
+            json.dump(config, handle, indent=4, sort_keys=True)
+        print("Wrote new config")
+    app.config['BASIC_AUTH_USERNAME'] = config['username']
+    app.config['BASIC_AUTH_PASSWORD'] = config['password']