use primary mac as node id

d3mapbuilder.py

@@ -7,7 +7,7 @@ class D3MapBuilder:
   def build(self):
     output = dict()
 
-    output['nodes'] = [{'group': x.group, 'name': x.name,
+    output['nodes'] = [{'group': x.group, 'name': x.name, 'id': x.id,
                         'macs': ', '.join(x.macs)
                        } for x in self._db.get_nodes() if x.online]
     output['links'] = [{'source': x.pair[0], 'target': x.pair[1],

node.py

@@ -1,6 +1,7 @@
 class Node():
   def __init__(self):
     self.name = ""
+    self.id = ""
     self.macs = set()
     self.group = 0
     self.online = False

nodedb.py

@@ -98,6 +98,17 @@ class NodeDB:
 
         self._links.add(tuple(sorted((a,b))))
 
+    for line in lines:
+      x = json.loads(line)
+
+      if 'primary' in x:
+        try:
+          node = self.maybe_node_by_mac((x['primary'], ))
+        except:
+          continue
+
+        node.id = x['primary']
+
   def import_aliases(self, aliases):
     for mac, alias in aliases.items():
       try: