Making getNodesInCluster() recursive

docs/network/index.html

@@ -622,11 +622,13 @@ <h2 id="methods">Methods</h2>
             </tr>
             <tr class="collapsible toggle" onclick="toggleTable('methodTable','getNodesInCluster', this);">
                 <td colspan="2"><span parent="getNodesInCluster" class="right-caret" id="method_getNodesInCluster"></span> getNodesInCluster(
-                    <code>String clusterNodeId</code>)
+                    <code>String clusterNodeId, [Boolean recursive]</code>)
             </tr>
             <tr class="hidden" parent="getNodesInCluster">
                 <td class="midMethods">Returns: Array</td>
-                <td>Returns an array of all nodeIds of the nodes that would be released if you open the cluster.
+                <td>Returns an array of all nodeIds of the nodes that would be released if you open the cluster. If the recursive parameter is false or 
+                    undefined and the cluster contains other clusters, this method will return nodeIds of clusters. If the recursive parameter is true
+                    and the cluster contains other clusters, this method will recursively get the nodeIds of the unclustered nodes.
                 </td>
             </tr>
             <tr class="collapsible toggle" onclick="toggleTable('methodTable','openCluster', this);">

lib/network/modules/Clustering.js

@@ -850,15 +850,25 @@ class ClusterEngine {
   /**
    *
    * @param {Cluster.id} clusterId
+   * @param {boolean} [recursive=false]
    * @returns {Array.<Node.id>}
    */
-  getNodesInCluster(clusterId) {
+  getNodesInCluster(clusterId, recursive = false) {
     let nodesArray = [];
     if (this.isCluster(clusterId) === true) {
       let containedNodes = this.body.nodes[clusterId].containedNodes;
       for (let nodeId in containedNodes) {
         if (containedNodes.hasOwnProperty(nodeId)) {
-          nodesArray.push(this.body.nodes[nodeId].id)
+          if (!recursive) {
+            nodesArray.push(this.body.nodes[nodeId].id);
+          } else {
+            let id = this.body.nodes[nodeId].id;
+            if (this.isCluster(id)) {
+              nodesArray = nodesArray.concat(this.getNodesInCluster(id, recursive));
+            } else {
+              nodesArray.push(id);
+            }
+          }
         }
       }
     }