Functional login and logout, login system should be fucntionally implemented.

Testing and polishing are next.

app/__init__.py

@@ -1,4 +1,5 @@
 from flask import Flask
+import os
 from flask_sqlalchemy import SQLAlchemy
 from flask_login import LoginManager
 
@@ -8,8 +9,11 @@ login_manager = LoginManager()
 def create_app():
     app = Flask(__name__)
 
-    app.config["SQLALCHEMY_DATABASE_URI"] = ""
+    BASE_DIR = os.path.abspath(os.path.dirname(__file__))
+
+    app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///" + os.path.join(BASE_DIR, "app.db")
     app.config["SECRET_KEY"] = "dev-secret-key"
+    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
 
     db.init_app(app)
     login_manager.init_app(app)
@@ -17,6 +21,9 @@ def create_app():
 
     from .models.user import User
 
+    with app.app_context():
+        db.create_all()
+
     @login_manager.user_loader
     def load_user(user_id):
         return db.session.get(User, int(user_id))

app/models/user.py

@@ -7,8 +7,9 @@ class User(UserMixin, db.Model):
     id = db.Column(db.Integer, primary_key=True)
     username = db.Column(db.String(20), unique=True, nullable=False)
     password = db.Column(db.String(255), nullable=False)  # <- größer!
-    email = db.Column(db.String(120), unique=True, nullable=False)
+    email = db.Column(db.String(120), unique=True, nullable=True)
     created_at = db.Column(db.DateTime, server_default=db.func.now())
+    last_login = db.Column(db.DateTime)
 
     def __repr__(self):
         return f"<User {self.username}>"

app/routes/login_routes.py

@@ -1,6 +1,6 @@
-from flask import Blueprint, render_template, request, url_for, redirect
+from flask import Blueprint, render_template, request, url_for, redirect, flash
 from werkzeug.security import generate_password_hash, check_password_hash
-from flask_login import login_user
+from flask_login import login_user, login_required, logout_user
 from ..models.user import User
 from .. import db
 
@@ -11,7 +11,6 @@ def register():
     if request.method == "POST":
         username = request.form.get("username")
         password = request.form.get("password")
-        email = request.form.get("email")
 
         if User.query.filter_by(username=username).first():
             return render_template("sign_up.html", error="Username already taken!")
@@ -20,8 +19,7 @@ def register():
 
         new_user = User(
             username=username,
-            password=hashed_password,
-            email=email
+            password=hashed_password
         )
 
         db.session.add(new_user)
@@ -47,3 +45,10 @@ def login():
         return render_template("login.html", error="Invalid username or password")
 
     return render_template("login.html")
+
+@login_bp.route('/logout')
+@login_required
+def logout():
+    logout_user()
+    flash('You have been logged out', 'info')
+    return redirect(url_for('login.login'))

app/routes/main_routes.py

@@ -1,7 +1,13 @@
 from flask import Blueprint, render_template
+from flask_login  import login_required, current_user
 
 main_bp = Blueprint("main", __name__)
 
 @main_bp.route("/")
 def home():
     return render_template("index.html")
+
+@main_bp.route('/dashboard')
+@login_required
+def dashboard():
+    return render_template('dashboard.html', user=current_user)

app/templates/dashboard.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Dashboard</title>
+</head>
+
+<body>
+
+    <nav>
+        <a href="{{ url_for('main.dashboard') }}">Dashboard</a>
+        <a href="{{ url_for('login.logout') }}">Logout</a>
+    </nav>
+
+    <div class="container">
+
+        ```
+        <h1>Dashboard</h1>
+
+        <p>Welcome back <strong>{{ current_user.username }}</strong> 👋</p>
+
+        <div class="user-info">
+            <h3>Your Account</h3>
+
+            <p><strong>User ID:</strong> {{ current_user.id }}</p>
+            <p><strong>Username:</strong> {{ current_user.username }}</p>
+
+            {% if current_user.email %}
+            <p><strong>Email:</strong> {{ current_user.email }}</p>
+            {% else %}
+            <p><strong>Email:</strong> Not set</p>
+            {% endif %}
+
+            <p><strong>Account created:</strong> {{ current_user.created_at }}</p>
+        </div>
+
+        <div class="logout">
+            <form action="{{ url_for('login.logout') }}" method="post">
+                <button type="submit">Logout</button>
+            </form>
+        </div>
+        ```
+
+    </div>
+
+</body>
+
+</html>

app/templates/index.html

@@ -27,7 +27,7 @@
                 <a href="/dashboard">Dashboard</a>
                 <a href="/logout">Logout</a>
                 {% else %}
-                <a href="/login">Login</a>
+                <a href="{{ url_for('login.login') }}">Login</a>
                 {% endif %}
             </nav>
         </div>

app/templates/login.html

@@ -19,8 +19,8 @@
 <body>
     <nav>
         <ul>
-            <li><a href="/login">Login</a></li>
-            <li><a href="/register">Create account</a></li>
+            <li><a href="{{ url_for('login.login') }}">Login</a></li>
+            <li><a href="{{ url_for('login.register') }}">Create account</a></li>
         </ul>
     </nav>
     <h1>Login to your account</h1>
@@ -29,7 +29,7 @@
     <p class="error">{{ error }}</p>
     {% endif %}
 
-    <form action="/login" method="post">
+    <form action="{{ url_for('login.login') }}" method="post">
         <label for="username">Username:</label>
         <input type="text" name="username" required />
         <label for="password">Password:</label>

app/templates/sign_up.html

@@ -19,8 +19,8 @@
 <body>
     <nav>
         <ul>
-            <li><a href="/login">Login</a></li>
-            <li><a href="/register">Create account</a></li>
+            <li><a href="{{ url_for('login.login') }}">Login</a></li>
+            <li><a href="{{ url_for('login.register') }}">Create account</a></li>
         </ul>
     </nav>
     <h1>Create an account</h1>
@@ -29,7 +29,7 @@
     <p class="error">{{ error }}</p>
     {% endif %}
 
-    <form action="/register" method="post">
+    <form action="{{ url_for('login.register') }}" method="post">
         <label for="username">Username:</label>
         <input type="text" name="username" required />
         <label for="password">Password:</label>