Added block for adding cases to actors

src/Plugin/Block/AddCase.php

@@ -0,0 +1,53 @@
+<?php declare(strict_types = 1);
+
+namespace Drupal\opencase\Plugin\Block;
+
+use Drupal\Core\Block\BlockBase;
+
+/**
+ * Provides a Block for adding cases to an actor
+ *
+ * @Block(
+ *   id = "add_case",
+ *   admin_label = @Translation("Add Case"),
+ *   category = @Translation("Opencase"),
+ * )
+ */
+class AddCase extends BlockBase {
+
+    /**
+     * {@inheritdoc}
+     */
+    public function build():array {
+        $actor = \Drupal::routeMatch()->getParameter('oc_actor');
+        $target_id = $actor->id();
+        $actorType = $actor->bundle();
+        $markup = "<ul>";
+        $case_types = $this->getCaseTypesToDisplay($actorType);
+        foreach($case_types as $id => $info) {
+            $label = $info['label'];
+            $markup .= "foo";
+            #$markup .= "<li><a href='/opencase/oc_case/add/$id?target_id=$target_id&destination=/opencase/oc_actor/$target_id'>$label</a></li>";
+        }
+        $markup .= "</ul>";
+        return array('#markup' => $markup);
+    }
+
+    public function getCacheMaxAge():int {
+        return 0;
+    }
+
+    private function getCaseTypesToDisplay(string $actorType): array {
+        // Client modules will provide a list of what case types (bundles) are relevant for each actor type.
+        // Check if they are implemented, and if so display them.
+        $implemented_case_types = \Drupal::service('entity_type.bundle.info')->getBundleInfo('oc_case');
+        $relevant_case_type_ids = \Drupal::moduleHandler()->invokeAll('relevant_case_type_ids', [$actorType]);
+        $case_types_to_display = [];
+        foreach ($relevant_case_type_ids as $type_id) {
+            if (array_key_exists($type_id, $implemented_case_types)) {
+                $case_types_to_display[$type_id] = $implemented_case_types[$type_id];
+            }
+        }
+        return $case_types_to_display;
+    }
+}