geekswaroop · thedragoncoder · Mar 9, 2020
diff --git a/app.py b/app.py
@@ -0,0 +1,91 @@
+from flask import *
+from datetime import timedelta
+from flask_sqlalchemy import SQLAlchemy
+from flask_sqlalchemy_session import *
+
+app = Flask(__name__)
+app.secret_key = "hello"
+app.permanent_session_lifetime = timedelta(minutes=5)
+app.config["SQLALCHEMY_DATABASE_URI"] = 'sqlite:///users.sqlite3'
+app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+
+db = SQLAlchemy(app)
+
+
+class users(db.Model):
+    _id = db.Column("id", db.Integer, primary_key=True)
+    name = db.Column(db.String(100))
+    email = db.Column(db.String(100))
+
+    def __init__(self, name, email):
+        self.name = name
+        self.email = email
+
+
+@app.route('/')
+def index():
+    return render_template("index.html")
+
+
+@app.route('/login', methods=["GET", "POST"])
+def login():
+    if request.method == "POST":
+        session.permanent = True
+        user = request.form["nm"]
+        session["user"] = user
+        flash("Login Successful!")
+        found_user = users.query.filter_by(name=user).first()
+        if found_user:
+            session["email"] = found_user.email
+        else:
+            usr = users(user, "")
+            db.Session.add(usr)
+            db.Session.commit()
+
+        return redirect(url_for("user"))
+    else:
+        if "user" in session:
+            flash("Already Logged in")
+            return redirect(url_for("user"))
+
+        return render_template("login.html")
+
+
+@app.route("/user", methods=["POST", "GET"])
+def user():
+    email = None
+    if "user" in session:
+        user = session["user"]
+
+        if request.method == "POST":
+            email = request.form["email"]
+            session["email"] = email
+            found_user = users.query.filter_by(name=user).first()
+            found_user.email = email
+            db.Session.commit()
+        else:
+            if "email" in session:
+                email = session["email"]
+
+        return render_template("user.html", email=email)
+    else:
+        flash("You are not logged in")
+        return redirect(url_for("login"))
+
+
+@app.route("/view")
+def view():
+    return render_template("view.html", values=users.query.all())
+
+
+@app.route("/logout")
+def logout():
+    session.pop("user", None)
+    flash("You have been logged out", "info")
+    session.pop("email", None)
+    return redirect(url_for("login"))
+
+
+if __name__ == '__main__':
+    db.create_all()
+    app.run(debug=True)
diff --git a/base.html b/base.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
+    <title>{% block title %} {% endblock %}</title>
+</head>
+<body>
+<nav class="navbar navbar-expand-lg navbar-light bg-light">
+  <a class="navbar-brand" href="/">Home</a>
+  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
+    <span class="navbar-toggler-icon"></span>
+  </button>
+  <div class="collapse navbar-collapse" id="navbarNav">
+    <ul class="navbar-nav">
+      <li class="nav-item active">
+        <a class="nav-link" href="/login">Login <span class="sr-only">(current)</span></a>
+      </li>
+      <li class="nav-item">
+        <a class="nav-link" href="/user">User</a>
+      </li>
+      <li class="nav-item">
+        <a class="nav-link" href="/logout">Logout</a>
+      </li>
+    </ul>
+  </div>
+</nav>
+
+ <div class="container-fluid">
+ {% block content  %}
+ {% endblock %}
+ </div>
+
+ <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
+ <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
+ <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
+
+
+</body>
+</html>
diff --git a/index.html b/index.html
@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+{% block title %}Home Page{% endblock %}
+{% block content %}
+Hello and welcome to the homepage
+{% endblock %}
diff --git a/login.html b/login.html
@@ -0,0 +1,15 @@
+{% extends "base.html" %}
+{% block title %}Login Page{% endblock %}
+{%  block content %}
+    {% with messages=get_flashed_messages() %}
+        {% if messages %}
+            {% for msg in messages %}
+                <p>{{ msg }}</p>
+            {% endfor %}
+        {% endif %}
+    {% endwith %}
+    <form action="#" method="POST">
+     <p> <input type="text" name="nm" /></p>
+    <p> <input type="submit" value="submit"></p>
+    </form>
+{% endblock %}
diff --git a/user.html b/user.html
@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+{% block title %}User{% endblock %}
+{% block content %}
+    {% with messages=get_flashed_messages() %}
+        {% if messages %}
+            {% for msg in messages %}
+                <p>{{ msg }}</p>
+            {% endfor %}
+        {% endif %}
+    {% endwith %}
+    <p> Welcome, {{ user }}</p>
+    <form action="#" method="POST">
+     <input type="email" name="email" placeholder="Enter Email" value="{{ email if email }}"/>
+     <input type="submit" value="submit"/>
+    </form>
+
+{% endblock %}
diff --git a/view.html b/view.html
@@ -0,0 +1,7 @@
+{% extends "base.html" %}
+{%  block title %}View{% endblock %}
+{%  block content %}
+    {% for item in values %}
+        <p>Name: {{ item.name }},Email: {{ item.email }}</p>
+    {% endfor %}
+{% endblock %}