Issue #3486543: Update cancel button functionality for add and update task.

src/Form/AddTaskForm.php

@@ -70,7 +70,7 @@ class AddTaskForm extends FormBase {
 
     $form['actions']['reset'] = [
       '#type' => 'submit',
-      '#value' => $this->t('Reset'),
+      '#value' => $this->t('Cancel'),
       '#button_type' => 'secondry',
     ];
     return $form;
@@ -88,19 +88,26 @@ class AddTaskForm extends FormBase {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $current_path = \Drupal::service('path.current')->getPath();
     $uri = 'tasks';
+    $message = $this->t('A new task has been created.');
     $body = [
       "content" => $form_state->getValue('task'),
       "description" => $form_state->getValue('task_description'),
       "due_string" => $form_state->getValue('task_due_data'),
     ];
+
     try {
+
+      if($form_state->getValue('op') == 'Cancel'){
+        return $form_state->setRedirect('todoist_api.taskscontroller');
+      }
       if (preg_match('/\bedit\b/', $current_path)) {
         $body['type'] = 'edit';
         $id = \Drupal::request()->get('id');
+        $message = $this->t('A task has been updated.');
       }
       $response = \Drupal::service('todoist_api.client')->post($uri, $body, $id);
       if ($response) :
-        $this->messenger()->addStatus($this->t('A new task has been created.'));
+        $this->messenger()->addStatus($message);
         $form_state->setRedirect('todoist_api.taskscontroller');
       endif;
     }