Refactor isConnected logic

Refactored isConnected logic into seperate function.

Author: ciband

index.js

@@ -98,6 +98,10 @@ var networks = {
   }
 };
 
+function isConnected() {
+  return server && connected;
+}
+
 function getNetworkFromNethash(nethash){
   for(var n in networks){
     if(networks[n].nethash == nethash){
@@ -461,7 +465,7 @@ vorpal
   .command('network stats', 'Get stats from network')
   .action(function(args, callback) {
     var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("Please connect to node or network before");
       return callback();
     }
@@ -546,7 +550,7 @@ vorpal
   .command('account status <address>', 'Get account status')
   .action(function(args, callback) {
     var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before");
       return callback();
     }
@@ -595,7 +599,7 @@ vorpal
   .command('account vote <name>', 'Vote for delegate <name>. Remove previous vote if needed')
   .action(function(args, callback) {
     var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before");
       return callback();
     }
@@ -726,7 +730,7 @@ vorpal
   .command('account unvote', 'Remove previous vote')
   .action(function(args, callback) {
     var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before");
       return callback();
     }
@@ -807,7 +811,7 @@ vorpal
   .command('account send <amount> <address>', 'Send <amount> ark to <address>. <amount> format examples: 10, USD10.4, EUR100')
   .action(function(args, callback) {
 		var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before");
       return callback();
     }
@@ -917,7 +921,7 @@ vorpal
   .command('account delegate <username>', 'Register new delegate with <username> ')
   .action(function(args, callback) {
 		var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before");
       return callback();
     }
@@ -977,7 +981,7 @@ vorpal
   .command('account create', 'Generate a new random cold account')
   .action(function(args, callback) {
 		var self = this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before, in order to retrieve necessery information about address prefixing");
       return callback();
     }
@@ -992,7 +996,7 @@ vorpal
   .command('account vanity <string>', 'Generate an address containing lowercased <string> (WARNING you could wait for long)')
   .action(function(args, callback) {
     var self=this;
-    if(!server || !connected){
+    if(!isConnected()){
       self.log("please connect to node or network before, in order to retrieve necessery information about address prefixing");
       return callback();
     }