:recycle: re-paginating by-alpha return

plugins/cia-endpoints/includes/class.make-sortby.php

@@ -33,7 +33,23 @@ class Make_Sort_By extends WP_REST_Controller {
         ));
         wp_reset_postdata();
 
-        return new WP_REST_Response( $this->prepare_items_for_reponse($res), 200 );
+        // Get parameters from request,
+        // /?limit=<num>&?orderby=<str>&?order=<str>
+        $args = array(
+            'posts_per_page' => -1,
+            'page' => 1
+        );
+        $params = $request->get_params();
+        if(intval($params['limit']) > 0) {
+            $args['posts_per_page'] = intval($params['limit']);
+        }
+        if(intval($params['p']) > 1) {
+            $args['page'] = intval($params['p']);
+        }
+        $index_from_page = $args['page'] - 1;
+        $offset = array_chunk($res, $args['posts_per_page']);
+        $page = $offset[$index_from_page];
+        return new WP_REST_Response( $this->prepare_items_for_reponse($page), 200 );
     }
 
     public function by_material( $request ) {