Simpler network map scan (#1543)

* Initial iterative rewrite of network scan

* Remove unused linkKey

* Restore original log message

* Cleaner array flattening

* Fix various travis warnings

lib/zigbee.js

@@ -267,16 +267,44 @@ class Zigbee {
         return this.shepherd.find(device.ieeeAddr, 1);
     }
 
+    getScanable() {
+        return this.getDevices().filter((d) => d.type != 'EndDevice');
+    }
+
     getGroup(ID) {
         return this.shepherd.getGroup(ID);
     }
 
     networkScan(callback) {
         logger.info('Starting network scan...');
-        this.shepherd.lqiScan().then((result) => {
+
+        const processResponse = function(parent, shepherd) {
+            return function(data) {
+                const linkSet = [];
+                return new Promise((resolve) => {
+                    data.forEach(function(devinfo) {
+                        const childDev = shepherd._findDevByAddr(devinfo.ieeeAddr);
+                        devinfo.parent = parent;
+                        devinfo.status = childDev ? childDev.status : 'offline';
+                        linkSet.push(devinfo);
+                    });
+                    resolve(linkSet);
+                });
+            };
+        };
+
+        const allScans = this.getScanable().map((dev) => {
+            return this.shepherd.lqi(dev.ieeeAddr).then(processResponse(dev.ieeeAddr, this.shepherd));
+        }, this);
+        Promise.all(allScans).then((linkSets) => {
+            const linkMap = [].concat(...linkSets);
             logger.info('Network scan completed');
-            callback(result);
-        });
+            callback(linkMap);
+        })
+            .catch(function() {
+                logger.info('Network scan failed');
+                callback([]);
+            });
     }
 
     getEndpoint(ieeeAddr, ep) {