Refactor form submission handling for sign up

- Disable submit button and display spinner during form submission to
prevent multiple clicks
- Obtain form field values and send signup request as form data for
processing on the server

static/build/index.js

@@ -9,6 +9,12 @@ document.addEventListener("DOMContentLoaded", function () {
         submitBtn.disabled = !formIsValid;
     });
 
+    signupForm.addEventListener("submit", function (event) {
+        event.preventDefault(); // Prevent the form from being submitted normally
+        submitSignup();
+    });
+    
+
     loginForm.addEventListener("submit", function (event) {
         event.preventDefault(); // Prevent the form from being submitted normally
         submitLogin();
@@ -60,6 +66,10 @@ function checkUsernameAvailability() {
         }
     };
     xhr.send();
+}
+
+
+function submitSignup() {
     // Disable the button to prevent multiple clicks
     submitBtn.disabled = true;
 
@@ -75,8 +85,42 @@ function checkUsernameAvailability() {
         submitBtn.innerHTML = 'Sign Up';
     }, 5000);
     sleep(5000).then(() => { submitBtn.disabled = false; });
+
+    // Get the values of the signup form fields
+    const name = document.getElementById("name").value;
+    const email = document.getElementById("email").value;
+    const username = document.getElementById("signup-username").value;
+    const password = document.getElementById("signup-password").value;
+
+    // Create a new FormData object and append the values
+    const formData = new FormData();
+    formData.append("name", name);
+    formData.append("email", email);
+    formData.append("username", username);
+    formData.append("password", password);
+
+    // Send the signup request as form data
+    fetch("/signup", {
+        method: "POST",
+        body: formData
+    })
+    .then(response => {
+        if (response.ok) {
+            return response.json();
+        } else {
+            throw new Error("Signup request failed");
+        }
+    })
+    .then(data => {
+        console.log(data);
+    })
+    .catch(error => {
+        console.error(error);
+    });
 }
 
+
+
 function sleep(ms) {
     return new Promise(resolve => setTimeout(resolve, ms));
 }