add success-feedback on user creation

server.py

@@ -30,7 +30,8 @@ PAM_PASSWD_SALT = "22"
 
 @app.route('/')
 def index():
-    return flask.render_template("index.html")
+    previousResponseCode = flask.request.args.get("code")
+    return flask.render_template("index.html", code=previousResponseCode)
 
 @app.route('/create-user', methods=["POST"])
 def createUser():
@@ -51,7 +52,8 @@ def deleteUser():
 @app.route('/list-users')
 def listUsers():
     users = db.session.query(FTPUser)
-    return flask.render_template("list_users.html", users=users)
+    previousResponseCode = flask.request.args.get("code")
+    return flask.render_template("list_users.html", users=users, code=previousResponseCode)
 
 def createUser(webform):
 

static/submit.js

@@ -51,7 +51,7 @@ function formSubmitFinished(event){
     if(event.target.status < 200 || event.target.status >= 300){
         showErrorMessage(event.target); // blocking
     }else{
-        window.location.href = event.target.responseText
+        window.location.href = event.target.responseText + "?code=0"
     }
 }
 

templates/index.html

@@ -47,10 +47,12 @@
                             </button>
 				</div>
 				<div class="card-footer">
-                    <!-- more content options
-					<div class="d-flex justify-content-center links mb-2">
-
+                    {% if code == "0" %}
+					<div class="d-flex justify-content-center links mb-2" style="color: darkgreen;">
+                        Success!
 					</div>
+                    {% endif %}
+                    <!-- more content options
 					<div class="d-flex justify-content-center links">
 						<a class="btn btn-block btn-primary text-uppercase" href="/contact"></a>
 					</div>