Keep topology nav visible if selected

client/app/scripts/reducers/__tests__/root-test.js

@@ -280,6 +280,25 @@ describe('RootReducer', () => {
     }]
   };
 
+  const ReceiveTopologiesHiddenAction = {
+    type: ActionTypes.RECEIVE_TOPOLOGIES,
+    topologies: [{
+      url: '/topo1',
+      name: 'Topo1',
+      stats: {
+        node_count: 1
+      }
+    }, {
+      hide_if_empty: true,
+      url: '/topo2',
+      name: 'Topo2',
+      stats: {
+        node_count: 0,
+        filtered_nodes: 0
+      }
+    }]
+  };
+
   const RouteAction = {
     type: ActionTypes.ROUTE_TOPOLOGY,
     state: {}
@@ -567,6 +586,21 @@ describe('RootReducer', () => {
     expect(isTopologyNodeCountZero(nextState)).toBeFalsy();
   });
 
+  it('keeps hidden topology visible if selected', () => {
+    let nextState = initialState;
+    nextState = reducer(nextState, ClickTopology2Action);
+    nextState = reducer(nextState, ReceiveTopologiesHiddenAction);
+    expect(nextState.get('currentTopologyId')).toEqual('topo2');
+    expect(nextState.get('topologies').toJS().length).toEqual(2);
+  });
+
+  it('keeps hidden topology hidden if not selected', () => {
+    let nextState = initialState;
+    nextState = reducer(nextState, ClickTopologyAction);
+    nextState = reducer(nextState, ReceiveTopologiesHiddenAction);
+    expect(nextState.get('topologies').toJS().length).toEqual(1);
+  });
+
   // selection of relatives
 
   it('keeps relatives as a stack', () => {

client/app/scripts/reducers/root.js

@@ -110,17 +110,17 @@ function calcSelectType(topology) {
 // adds ID field to topology (based on last part of URL path) and save urls in
 // map for easy lookup
 function processTopologies(state, nextTopologies) {
+  // add IDs to topology objects in-place
+  const topologiesWithId = updateTopologyIds(nextTopologies);
   // filter out hidden topos
-  const visibleTopologies = filterHiddenTopologies(nextTopologies);
+  const visibleTopologies = filterHiddenTopologies(topologiesWithId, state.get('currentTopologyId'));
   // set `selectType` field for topology and sub_topologies options (recursive).
   const topologiesWithSelectType = visibleTopologies.map(calcSelectType);
-  // add IDs to topology objects in-place
-  const topologiesWithId = updateTopologyIds(topologiesWithSelectType);
   // cache URLs by ID
   state = state.set('topologyUrlsById',
-    setTopologyUrlsById(state.get('topologyUrlsById'), topologiesWithId));
+    setTopologyUrlsById(state.get('topologyUrlsById'), topologiesWithSelectType));
 
-  const topologiesWithFullnames = addTopologyFullname(topologiesWithId);
+  const topologiesWithFullnames = addTopologyFullname(topologiesWithSelectType);
   const immNextTopologies = fromJS(topologiesWithFullnames).sortBy(topologySorter);
   return state.set('topologies', immNextTopologies);
 }

client/app/scripts/utils/topology-utils.js

@@ -126,9 +126,9 @@ export function setTopologyUrlsById(topologyUrlsById, topologies) {
   return urlMap;
 }
 
-export function filterHiddenTopologies(topologies) {
+export function filterHiddenTopologies(topologies, currentTopologyId) {
   return topologies.filter(t => (!t.hide_if_empty || t.stats.node_count > 0 ||
-                               t.stats.filtered_nodes > 0));
+                               t.stats.filtered_nodes > 0 || t.id === currentTopologyId));
 }
 
 export function getCurrentTopologyOptions(state) {