1 files changed, 43 insertions, 0 deletions
diff --git a/app/assets/javascripts/profile/add_ssh_key_validation.js b/app/assets/javascripts/profile/add_ssh_key_validation.js
new file mode 100644
index 00000000000..ab6a6c1896c
--- /dev/null
+++ b/app/assets/javascripts/profile/add_ssh_key_validation.js
@@ -0,0 +1,43 @@
+export default class AddSshKeyValidation {
+  constructor(inputElement, warningElement, originalSubmitElement, confirmSubmitElement) {
+    this.inputElement = inputElement;
+    this.form = inputElement.form;
+
+    this.warningElement = warningElement;
+
+    this.originalSubmitElement = originalSubmitElement;
+    this.confirmSubmitElement = confirmSubmitElement;
+
+    this.isValid = false;
+  }
+
+  register() {
+    this.form.addEventListener('submit', event => this.submit(event));
+
+    this.confirmSubmitElement.addEventListener('click', () => {
+      this.isValid = true;
+      this.form.submit();
+    });
+
+    this.inputElement.addEventListener('input', () => this.toggleWarning(false));
+  }
+
+  submit(event) {
+    this.isValid = AddSshKeyValidation.isPublicKey(this.inputElement.value);
+
+    if (this.isValid) return true;
+
+    event.preventDefault();
+    this.toggleWarning(true);
+    return false;
+  }
+
+  toggleWarning(isVisible) {
+    this.warningElement.classList.toggle('hide', !isVisible);
+    this.originalSubmitElement.classList.toggle('hide', isVisible);
+  }
+
+  static isPublicKey(value) {
+    return /^(ssh|ecdsa-sha2)-/.test(value);
+  }
+}