ISTWCMS-1978: Adding validation for twitter.

uw_virtual_site_homepage.module

@@ -431,15 +431,33 @@ function uw_virtual_site_homepage_form_uw_virtual_site_homepage_node_form_alter(
   // Adding the redirect back to the homepage after the save of the uw_virtual_site_homepage.
   $form['actions']['submit']['#submit'][] = 'uw_virtual_site_homepage_node_form_redirect';
 
-  // Adding the validate for removing duplicate buttons.
-  $form['#validate'][] = 'uw_virtual_site_homepage_button_validate';
+  // Adding the validate for twitter.
+  $form['#validate'][] = '_uw_virtual_site_homepage_twitter_validate';
 }
 
 /**
- * The validate buttons by adding css in order to remove duplicate buttons.
+ * The validate for twitter.
  */
-function uw_virtual_site_homepage_button_validate(&$form, &$form_state) {
+function _uw_virtual_site_homepage_twitter_validate(&$form, &$form_state) {
 
+    // If there is a twitter username.
+    if(isset($form_state['values']['field_uw_twitter_username'][LANGUAGE_NONE][0]['value'])) {
+
+        // If the twitter username has a value.
+        if($form_state['values']['field_uw_twitter_username'][LANGUAGE_NONE][0]['value'] !== "") {
+
+            // If there is a twitter type.
+            if(isset($form_state['values']['field_uw_twitter_type'][LANGUAGE_NONE][0])) {
+
+                // If the twitter type has no value, set a form error.
+                if($form_state['values']['field_uw_twitter_type'][LANGUAGE_NONE][0]['value'] == NULL) {
+
+                    // Set the form error.
+                    form_set_error('field-uw-twitter-username', 'You must select a place to display the twitter feed.');
+                }
+            }
+        }
+    }
 }
 
 /**