main.py

from flask import Flask, render_template, url_for, request, redirect, flash
from datetime import datetime
from werkzeug.utils import secure_filename
import os, time, sys
"""
The following are the import for the backend. Just write the name of the script without .py
"""
sys.path.append(os.path.join(os.path.dirname(sys.path[0]),'backend'))
import input

#define the app
app = Flask(__name__)

#the secret key :)
app.secret_key = '54321'

#specifies where the upload directory is and the file type available for uploads
UPLOAD_FOLDER = 'upload'
ALLOWED_EXTENSIONS = {'.csv','.xes'}
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

#home page route
@app.route('/')
def index():
    return render_template('index.html')

#the upload functionality. It then redirects to the case labeling page
@app.route('/', methods=['POST'])
def upload_file():
    uploaded_file = request.files['file']
    if uploaded_file.filename != '':
        uploaded_file.save(os.path.join(app.config['UPLOAD_FOLDER'],uploaded_file.filename))
    elif uploaded_file.filename == '':
        flash('No files selected! Please select a file!')
        return redirect(url_for('index'))
    return redirect(url_for('case'))     

#login page route. eventually will be removed
@app.route('/login.html')
def login():
    return render_template('login.html')

#signup page route. eventually will be removed
@app.route('/signup.html')
def signup():
    return render_template('signup.html')

#case selection page route
@app.route('/case.html')
def case():
    return render_template('case.html')

#eventually to input the case ID, case ID is then sent to backend
@app.route('/case.html', methods=['POST'])
def get_caseid():
    caseid = request.form['caseId']
    if caseid != '':
        return redirect(url_for('recommendation',id=caseid))
    else:
        flash('Please input a case ID!')
        return redirect(url_for('case'))

#placeholder result page route. Will eventually be removed and is now defunct.
@app.route('/result.html')
def result():
    return render_template('result.html')

#the actual result page route, accepts result from backend but for now it's specifically from input.py
@app.route('/result.html/<id>', methods=['GET'])
def recommendation(id):
    res = input.foo(id)
    return render_template('result.html',res=res)

#loading page route
@app.route('/loading.html')
def loading():
    return render_template('loading.html')

#about us page route
@app.route('/aboutus.html')
def aboutus():
    return render_template('aboutus.html')

if __name__ == "__main__":
    port = int(os.environ.get('PORT', 5000))
    app.run(debug=True, host='0.0.0.0', port=port)