add clearlayers action

projects/common-map/src/fm-map/reducers/map.reducer.ts

@@ -328,7 +328,7 @@ export function reducer(state = initialState, action: mapActions.Actions | commo
     case mapActions.SETEXTENT: {
       let a = action as mapActions.SetExtent;
       return tassign(state, { extent: a.extent });
-    }   
+    }
     case mapActions.ADDLAYER: {
       let a = action as mapActions.AddLayer;
       let itemLayers = state.overlayLayers.slice(0);
@@ -355,6 +355,9 @@ export function reducer(state = initialState, action: mapActions.Actions | commo
       newLayers.splice(i, 1);
       return tassign(state, { overlayLayers: newLayers, selectedOverlayLayer: selectedOverlayLayer });
     }
+    case mapActions.CLEARLAYERS: {
+      return tassign(state, {overlayLayers: [], selectedOverlayLayer: null});
+    }
     case mapActions.SETVISIBILITY: {
       let a = action as mapActions.SetVisibility;
       let newLayers = state.overlayLayers.slice(0);
@@ -448,7 +451,7 @@ export function reducer(state = initialState, action: mapActions.Actions | commo
       let a = action as mapActions.SelectOverlayLayer;
       return tassign(state, { selectedOverlayLayer: a.itemLayer });
     }
-  
+
     case mapActions.CLEAR: {
       let newQueryState = tassign(state.queryState, { query: null, tags: null, itemCode: null, parentCode: null, itemType: null });
       return tassign(state, {
@@ -480,7 +483,7 @@ export function reducer(state = initialState, action: mapActions.Actions | commo
     case mapActions.SETREPLACEURL: {
       let a= action as mapActions.SetReplaceUrl;
       return tassign(state,{replaceUrl:a.replaceUrl});
-    }   
+    }
     default: {
       return state;
     }