Added error message when name field is empty

application/public/styles.scss

@@ -110,3 +110,8 @@ form {
   width: 400px;
 }
 
+.error {
+  color: red;
+  text-align: center;
+  font-size: 1.2em;
+}

application/src/main.rs

@@ -1,5 +1,5 @@
-use leptos::*;
 use application::App;
+use leptos::*;
 
 fn main() {
     // set up logging

application/src/pages/participants/add.rs

@@ -19,13 +19,16 @@ pub fn Add() -> impl IntoView {
 
     let (name, set_name) = create_signal(String::from(""));
     let (group, set_group) = create_signal(String::from("A1"));
+    let (error, set_error) = create_signal(String::from(""));
 
     let on_submit = move |ev: leptos::ev::SubmitEvent| {
         ev.prevent_default();
+        set_error.set(String::from(""));
 
-        websocket.add_person(name.get(), group.get());
-
-        set_name.set(String::from(""))
+        match websocket.add_person(name.get(), group.get()) {
+            Ok(_) => set_name.set(String::from("")),
+            Err(err) => set_error.set(err),
+        }
     };
     view! {
         <h1>"Deelnemer toevoegen"</h1>
@@ -80,5 +83,8 @@ pub fn Add() -> impl IntoView {
             />
             <input type="submit" value="Submit" />
         </form>
+        <p class="error">
+            { error }
+        </p>
     }
 }

application/src/util/surrealdb.rs

@@ -102,7 +102,11 @@ impl SurrealContext {
         self.send(&json!(request).to_string());
     }
 
-    pub fn add_person(&self, name: String, group: String) {
+    pub fn add_person(&self, name: String, group: String) -> Result<(), String> {
+        if name.is_empty() {
+            return Err(String::from("Name cannot be empty"));
+        }
+
         let request = SurrealRequest {
             id: 1,
             method: String::from("create"),
@@ -115,7 +119,7 @@ impl SurrealContext {
             ],
         };
 
-        self.send(&json!(request).to_string())
+        Ok(self.send(&json!(request).to_string()))
     }
 }