Add email confirmation

app/models.py

@@ -22,16 +22,31 @@ class User(UserMixin, db.Model):
     username = db.Column(db.String(64), unique=True, index=True)
     password_hash = db.Column(db.String(128))
     role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))
+    confirmed = db.Column(db.Boolean, default=False)
 
     def __repr__(self):
         return '<User %r>' % self.username
 
-    password_hash = db.Column(db.String(128))
+    def generate_confirmation_token(self, expiration=3600):
+        s = Serializer(current_app.config['SECRET_KEY'], expiration)
+        return s.dumps({'confirm': self.id}).decode('utf-8')
 
     def generate_reset_token(self, expiration=3600):
         s = Serializer(current_app.config['SECRET_KEY'], expiration)
         return s.dumps({'reset': self.id}).decode('utf-8')
 
+    def confirm(self, token):
+        s = Serializer(current_app.config['SECRET_KEY'])
+        try:
+            data = s.loads(token.encode('utf-8'))
+        except:
+            return False
+        if data.get('confirm') != self.id:
+            return False
+        self.confirmed = True
+        db.session.add(self)
+        return True
+
     @property
     def password(self):
         raise AttributeError('password is not a readable attribute')