#2 Added routes for login and logout

backend/app/models.py

@@ -1,7 +1,7 @@
 from app import db
 from flask_login import UserMixin
 from datetime import datetime
-
+from werkzeug.security import check_password_hash, generate_password_hash
 
 class User(UserMixin, db.Model):
     id = db.Column(db.Integer, primary_key=True)
@@ -12,6 +12,9 @@ class User(UserMixin, db.Model):
     last_seen = db.Column(db.DateTime, default=datetime.utcnow)
     token = db.Column(db.String(32), index=True, unique=True)
 
+    def __repr__(self):
+        return f'<User {self.username}>'
+
     def to_dict(self):
         return {
             "id": self.id,
@@ -19,3 +22,11 @@ class User(UserMixin, db.Model):
             "email": self.email,
             "about_me": self.about_me,
         }
+
+
+    def set_password(self, password):
+        self.password_hash = generate_password_hash(password)
+
+    def check_password(self, password):
+        return check_password_hash(self.password_hash, password)
+

backend/app/routes.py

@@ -1,22 +1,44 @@
+from flask_login import login_user, logout_user
 from app.bp import bp
 from flask import Response, jsonify, request
 from app.errors import error_response
+from flask_login import current_user
 
-from app import db
+from app import login
 from app.models import User
 
 
+@login.user_loader
+def load_user(user_id):
+    return User.query.get(user_id)
+
+
 @bp.route("/login", methods=["POST"])
-def login():
+def login_route():
     data = request.get_json()
-    print(data)
-    if not data.get("user_id"):
-        return error_response(400, "Must supply user_id")
+
+    if current_user.is_authenticated:
+        return error_response(400, 'A user is already logged in!')
+
+    if not data.get("user_id") or not data.get("password"):
+        return error_response(400, "Must supply user_id and password")
 
     user = User.query.get(data.get("user_id"))
     if not user:
         return error_response(400, "User not found")
 
+    if not user.check_password(data.get("password")):
+        return error_response(400, "Invalid password")
+
+    login_user(user)
     resp = jsonify(user.to_dict())
     resp.status_code = 200
     return resp
+
+@bp.route("/logout", methods=["POST"])
+def logout_route():
+    if not current_user.is_authenticated:
+        return error_response(400, "No users are logged in!")
+
+    logout_user()
+    return Response(status=200)