Add traverse function to ModelTree

kfet/static/kfet/js/kfet.api.js

@@ -622,7 +622,7 @@ class ModelForest {
             }
         }
 
-        if (direction >= 0) {
+        if (direction >= 0 && data.children) {
             for (let child_data of data.children) {
                 var child = this.get_or_create(child_data, 1);
                 child.parent = node;
@@ -669,7 +669,7 @@ class ModelForest {
         $container.append($rendered);
 
         //TODO: better sorting control
-        node.children.sort(ModelObject.compare);
+        node.children.sort(TreeNode.compare);
 
         for (let child of node.children) {
             var $child = this.render_element(child, templates, options);
@@ -701,40 +701,43 @@ class ModelForest {
      * @param {Object} [options] Options for element render method
      */
     display($container, templates, options) {
-        this.roots.sort(ModelObject.compare);
+        this.roots.sort(TreeNode.compare);
 
-        for (let root of roots) {
+        for (let root of this.roots) {
             $container.append(this.render_element(root, templates, options));
         }
 
         return $container;
     }
 
+    traverse(callback) {
+        function recurse(node) {
+            callback(node) ;
+
+            for (let child of node.children)
+                callback(child);
+        }
+
+        for (let root of this.roots)
+            recurse(root);
+    }
+
     /**
      * Find instance in data matching given properties.
      * @param {class} model
      * @param {Object} props Properties to match
      */
     find(type, id) {
-
-        function recurse(node) {
-            if (node.type === type && node.data.id === id)
-                return node ;
-
-            for (let child of node.children) {
-                if (result = recurse(node))
-                    return result;
-            }
-
-            return null;
+        var result = null;
+        function callback(node) {
+            if (node.type === type && node.content.id == id)
+                result = node ;
         }
 
-        for (let root of this.roots) {
-            if (result = recurse(root))
-                return result;
-        }
+        this.traverse(callback);
+
+        return result ;
 
-        return null ;
     }
 }