__init__.py

# app/__init__.py

# local imports
from __future__ import print_function
import vars

# third-party imports
import uuid
from flask import Flask, redirect, url_for, request, render_template, flash, session
from flask_bootstrap import Bootstrap
import random


def create_app(config_name):
    app = Flask(__name__) # initialization of the flask app
    Bootstrap(app) # allowing app to use bootstrap

    @app.route('/', methods=['GET', 'POST']) # initial route to display the reg page
    def index():

        if 'uid' not in session:
            session['uid']=str(uuid.uuid4())

        if "redir" in request.args and 'return_url' not in session: # check for redir arg in url
            session['return_url'] = request.args.get("redir")
        elif "redir" not in request.args and 'return_url' not in session:
            session['return_url'] = vars.default_referrer
        else:
            session['return_url'] = request.referrer

        return render_template('auth/SignUp.html', room_id=session['uid'], referrer=session['return_url'])

    # misc page error catching
    @app.errorhandler(403)
    def forbidden(error):
        return render_template('errors/403.html', title='Forbidden'), 403

    @app.errorhandler(404)
    def page_not_found(error):
        return render_template('errors/404.html', title='Page Not Found'), 404

    @app.errorhandler(500)
    def internal_server_error(error):
        return render_template('errors/500.html', title='Server Error'), 500

    return app