Allow show/hidelayer to add multiple overlyas in one go

To close #53

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### Change Log for Node-RED Worldmap
 
- - v1.5.4 - allow remote update of the split position via `msg.command.split`
+ - v1.5.5 - Allow multiple overlays to be enabled at once - Issue #53
+ - v1.5.4 - Allow remote update of the split position via `msg.command.split`
  - v1.5.3 - Add side by side mode (via `msg.command` only).
  - v1.5.2 - Make manually added icons moveable by default.
  - v1.5.0 - Add multi-map capability - can now have multiple map endpoints. Issue #40 PR #51

README.md

@@ -9,7 +9,8 @@ map web page for plotting "things" on.
 
 ### Updates
 
-- v1.5.4 - allow remote update of the split position via `msg.command.split`
+- v1.5.5 - Allow multiple overlays to be enabled at once - Issue #53
+- v1.5.4 - Allow remote update of the split position via `msg.command.split`
 - v1.5.3 - Add side by side mode (via `msg.command` only).
 - v1.5.2 - Make manually added icons moveable by default.
 - v1.5.0 - Add multi-map capability - can now have multiple map endpoints.
@@ -245,8 +246,8 @@ Optional properties include
  - **lon** - move map to specified longitude.
  - **zoom** - move map to specified zoom level (1 - world, 13 to 20 max zoom depending on map).
  - **layer** - set map to specified base layer name - `{command:{layer:"Esri"}}`
- - **showlayer** - show the named overlay - `{command:{showlayer:"foo"}}`
- - **hidelayer** - hide the named overlay - `{command:{hidelayer:"bar"}}`
+ - **showlayer** - show the named overlay(s) - `{command:{showlayer:"foo"}}` or `{command:{showlayer:["foo","bar"]}}`
+ - **hidelayer** - hide the named overlay(s) - `{command:{hidelayer:"bar"}}` or `{command:{hidelayer:["bar","another"}}`
  - **side** - add a second map alongside with slide between them. Use the name of the *baselayer* to add - or "none" to remove the control. - `{command:{side:"Esri Satellite"}}`
  - **split** - once you have split the screen - the split value is the % across the screen of the split line. - `{command:{split:50}}`
  - **map** - Object containing details of a new map layer:

worldmap/index.html

@@ -1506,13 +1506,26 @@ function doCommand(cmd) {
         sidebyside.lay = cmd.side;
     }
     if (cmd.split && sidebyside && (cmd.split <= 100) && (cmd.split >= 0)) { console.log("DING",cmd.split); sidebyside.setSplit(cmd.split); }
-    // Turn on an existing overlay
-    if (cmd.hasOwnProperty("showlayer") && overlays.hasOwnProperty(cmd.showlayer)) {
-        map.addLayer(overlays[cmd.showlayer]);
+    // Turn on an existing overlay(s)
+    if (cmd.hasOwnProperty("showlayer")) {
+        if (typeof cmd.showlayer === "string") { cmd.showlayer = [ cmd.showlayer ]; }
+        console.log(typeof cmd.showlayer,cmd.showlayer);
+        for (var i=0; i < cmd.showlayer.length; i++) {
+            console.log(cmd.showlayer[i]);
+            if (overlays.hasOwnProperty(cmd.showlayer[i])) {
+                console.log("DING");
+                map.addLayer(overlays[cmd.showlayer[i]]);
+            }
+        }
+    }
+    // Turn off an existing overlay(s)
+    if (cmd.hasOwnProperty("hidelayer")) {
+        if (typeof cmd.hidelayer === "string") { cmd.hidelayer = [ cmd.hidelayer ]; }
+        for (var i=0; i < cmd.hidelayer.length; i++) {
+            if (overlays.hasOwnProperty(cmd.hidelayer[i])) {
+                map.removeLayer(overlays[cmd.hidelayer[i]]);
+            }
         }
-    // Turn off an existing overlay
-    if (cmd.hasOwnProperty("hidelayer") && overlays.hasOwnProperty(cmd.hidelayer)) {
-        map.removeLayer(overlays[cmd.hidelayer]);
     }
     var clat = map.getCenter().lat;
     var clon = map.getCenter().lng;

worldmap/worldmap.appcache

@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# date: Oct 17th 2018 - v1.5.4
+# date: Oct 17th 2018 - v1.5.5
 
 CACHE:
 index.html