fix persistent sessions

app_setup.py

@@ -1,7 +1,7 @@
 from flask import Flask
 import config
 from recaptcha_helper import Recaptcha
-
+from datetime import timedelta
 
 app = Flask(__name__)
 
@@ -10,7 +10,9 @@
 
 # Set secret key for Flask App.
 app.config['SECRET_KEY'] = config.SECRET_KEY
-
+app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(days=30)
+app.config['SESSION_COOKIE_SECURE'] = isProd
+app.config['SESSION_COOKIE_SAMESITE'] = 'Lax'
 if isProd:
     # Keys for Google reCAPTCHA.
     app.config['RECAPTCHA_SITE_KEY'] = config.RECAPTCHA_SITE_KEY

taskapp.py

@@ -127,6 +127,8 @@ def get_related_completed_item_ids_for_task(user, tier: str, task_id: str) -> li
 # Base route for the website, renders hero.html
 @app.route('/')
 def index():
+    if session.get('logged_in'):
+        return redirect(url_for('dashboard'))
     return render_template('hero.html')
 
 # Register route, renders registerV2.html on GET request.
@@ -211,6 +213,8 @@ def register_user():
 # On POST request, verifies the users input and logs the user in.
 @app.route('/login/', methods= ['GET', 'POST'])
 def login():
+    if request.method == 'GET' and session.get('logged_in'):
+        return redirect(url_for('dashboard'))
     try:
         error = None
         coll = db['users']