Fixing getting responsive image variables to any field

uw_fdsu_theme_resp.theme

@@ -167,22 +167,13 @@ function _uw_fdsu_theme_resp_get_field_value_from_paragraph($paragraph, $field)
  * Set the variables required for a responsive image.
  *
  * @param $variables
- * @param $field_name
+ * @param $field
  * @param $responsive_image_style
  */
-function _uw_fdsu_theme_resp_add_responsive_image_variables(&$variables, $field_name, $responsive_image_style, $use_separate_variable = FALSE) {
-
-  // Get the field entity from the paragraph.
-  $field = $variables['paragraph']->get($field_name)->first();
-
-  // Set the alt tag from the field entity.
-  $variables['alt'] = $field->get('alt')->getValue();
-
-  // Set the file entity based on the field name.
-  $file = $field->entity;
+function _uw_fdsu_theme_resp_add_responsive_image_variables(&$variables, $field, $responsive_image_style) {
 
   // If there is a file present, set responsive image variables.
-  if ($file) {
+  if ($file = $field->entity) {
 
     // Set uri and image style id.
     $variables['uri'] = $file->getFileUri();
@@ -193,30 +184,31 @@ function _uw_fdsu_theme_resp_add_responsive_image_variables(&$variables, $field_
     // for the responsive image style.
     template_preprocess_responsive_image($variables);
 
-    // Set the old_sources to the sources in variables.
+    // Start with clean arrays.
+    unset($old_sources);
+    unset($new_sources);
+
+    // Set old_sources to the ones set in the template preprocess.
     $old_sources = $variables['sources'];
 
-    // Unset the sources variable.
-    unset($variables['sources']);
+    // Step through each source and get string values.
+    foreach ($old_sources as $source) {
 
-    // Step through each source and only get value.
-    // This is need so that a render doesn't happen
-    // and HTML escapes are put in place.
-    foreach($old_sources as $source) {
-      $sources[] = array (
+      // Set new_sources to the string values.
+      $new_sources[] = array (
         'srcset' => $source['srcset']->value(),
         'media' => $source['media']->value(),
         'type' => $source['type']->value(),
       );
     }
 
-    // If not to set sources in variables, return sources.
-    // Otherwise set the sources in variables.
-    if ($use_separate_variable) {
-      return $sources;
-    }
-    else {
-      $variables['sources'] = $sources;
-    }
+    // Set the alt tag for the picture.
+    $new_sources['alt'] = $field->get('alt')->getValue();
+
+    // Unset the old sources.
+    unset($variables['sources']);
+
+    // Return the new sources.
+    return $new_sources;
   }
 }