Added Utils class and refactored

src/Utils.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Drupal\opencase;
+
+/**
+ * Shared functions for the opencase module
+ *
+ */
+class Utils {
+
+
+  /**
+   * Generates a set of links for adding different types of a base entity
+   *
+   * $baseEntityType the type of entity to generate the links for (it will generate one for each bundle of the base type)
+   * $query optionally append a query string to the links (key => value format)
+   *
+   * returns html markup.
+   */
+  public static function generateAddLinks($baseEntityType, $query = []) {
+    
+    $bundles = \Drupal::service('entity_type.bundle.info')->getBundleInfo($baseEntityType);
+    $markup = '';
+    foreach($bundles as $bundle_id => $bundle) {
+      $label = $bundle['label'];
+      $url = \Drupal\Core\Url::fromRoute("entity.$baseEntityType.add_form", [$baseEntityType . '_type' => $bundle_id]);
+      $url->setOption('query', $query);
+      $link = \Drupal\Core\Link::fromTextAndUrl(t("Add $label"), $url)->toString();
+      $markup .= "<p>$link</p>";
+    }
+    return "<div class='opencase_add_links'>$markup</div>";
+  }
+}