important comments added

Firebase_Authentication_Using_Flask/db.py

@@ -1,6 +1,8 @@
+#Importing Firebase
 from firebase import Firebase
 import os
 
+#Intializing Firebase Configuration from the Environment Variables
 config = {
   "apiKey": os.environ.get("FIREBASE_APIKEY"),
   "authDomain": os.environ.get("FIREBASE_AUTHDOMAIN"),
@@ -12,6 +14,11 @@
   "measurementId": os.environ.get("FIREBASE_MEASUREMENT_ID")
   }
 
+#Intializing Firebase Object
 firebase = Firebase(config)
+
+#Intializing Firebase Databse
 db = firebase.database()
+
+#Intializing Firebase Auth
 auth = firebase.auth()

Firebase_Authentication_Using_Flask/main.py

@@ -1,11 +1,16 @@
+#Importing Flask and other important functions
 from flask import Flask, render_template, request, redirect, abort, flash, session ,url_for
+#Importing firebase auth from db.py
 from db import auth
 
 app = Flask(__name__)
 app.secret_key = "MBSAIADITYA"
 
 exempted_endpoints = ['signup','login','static']
 
+'''
+Signup Route
+''' 
 @app.route("/signup", methods = ['GET','POST'])
 def signup():
     if request.method=='POST':
@@ -16,6 +21,7 @@ def signup():
         if password == repassword:
             if len(password)>=6:
                 try:
+                    #Creating User in firebase using create_user_with_email_and_password method of firebase/auth
                     _user_ = auth.create_user_with_email_and_password(username ,password)
                     flash("User has been created successfully! Please Login")
                     return redirect("/")
@@ -29,13 +35,17 @@ def signup():
             return redirect("/signup")
     return render_template("signup.html")
 
+'''
+Login Route
+'''  
 @app.route("/login",methods = ['GET','POST'] )
 def login():
     if request.method == 'POST':
         data = dict(request.form)
         email = data.get("email")
         password = data.get("password")
         try:
+            #Signing User in firebase using sign_in_with_email_and_password method of firebase/auth
             user = auth.sign_in_with_email_and_password(email ,password)
             print(user)
             session['user'] = user['localId']
@@ -48,12 +58,16 @@ def login():
         return redirect("/")
     return render_template("login.html")
 
-
+'''
+Main dashboard route which has to be protected
+'''   
 @app.route("/",methods = ['GET','POST'])
 def start():
     return render_template("index.html", user=session['email'])
 
-
+'''
+Logout Route
+'''
 @app.route("/logout",methods = ['GET','POST'])
 def logout():
     session.pop('user')
@@ -62,6 +76,10 @@ def logout():
     return redirect("/")
 
 
+'''This is an important middleware that run before any request made to flask application and checks
+when user is authenticated or not!
+'''
+
 @app.before_request
 def before_request_func():
     if request.endpoint in exempted_endpoints: