check swarm connection before attempting to connect

lib/modules/swarm/index.js

@@ -29,6 +29,14 @@ class Swarm {
     this.setServiceCheck();
     this.addProviderToEmbarkJS();
     this.startProcess(() => {});
+
+    this._checkService((err) => {
+      if (!err) {
+        return;
+      }
+      self.logger.info("Swarm node not found, attempting to start own node");
+      self.startProcess(() => {});
+    });
   }
 
   commandlineDeploy() {
@@ -64,16 +72,23 @@ class Swarm {
 
     self.events.request("services:register", 'Swarm', function(cb){
       self.logger.trace(`Checking Swarm availability on ${self.bzz.currentProvider}...`);
-      self.bzz.isAvailable().then(result => {
+      self._checkService((err, result) => {
-        self.logger.trace("Swarm " + (result ? '':'un') + "available");
+        if (err) {
+          self.logger.trace("Check Swarm availability error: " + err);
+          return cb({name: "Swarm ", status: 'off'});
+        }
+        self.logger.trace("Swarm " + (result ? '':'on') + "available");
         return cb({name: "Swarm ", status: result ? 'on':'off'});
-      }).catch(err => {
+      });
-        self.logger.trace("Check Swarm availability error: " + err);
-        return cb({name: "Swarm ", status: 'off'});
-      }); 
     });
   }
 
+  _checkService(cb) {
+    this.bzz.isAvailable().then(result => {
+      cb(null, result);
+    }).catch(cb);
+  }
+
   addProviderToEmbarkJS() {
     // TODO: make this a shouldAdd condition
     if (this.storageConfig === {}) {