cli: enable reconnection reporting

PR-URL: #391
Reviewed-By: Denys Otrishko <shishugi@gmail.com>

lib/cli/command-processor.js

@@ -77,6 +77,10 @@ module.exports = class CommandProcessor extends EventEmitter {
       event: new EventCompleter(cli),
       connect: new ConnectCompleter(cli),
     };
+
+    this._connectionCloseListener = () => {
+      this.cli.log('Connection lost');
+    };
   }
 
   getNextCompleter(name) {
@@ -144,6 +148,20 @@ module.exports = class CommandProcessor extends EventEmitter {
           return;
         }
         this.cli.api = filterApiCompletions(api, ['_', 'domain']);
+
+        connection.once('close', this._connectionCloseListener);
+        connection.on('reconnectAttempt', () => {
+          this.cli.log('Attempting to reconnect...');
+        });
+        connection.on('reconnect', err => {
+          if (err) {
+            this.cli.log('Reconnection failed');
+            this.cli._logErr(err);
+          } else {
+            this.cli.log('Successfully reconnected');
+            connection.once('close', this._connectionCloseListener);
+          }
+        });
         // TODO: make event registering generic
         connection.on('event', (interfaceName, eventName, args) => {
           this.cli.log(`Received remote event '${eventName}'` +
@@ -171,6 +189,7 @@ module.exports = class CommandProcessor extends EventEmitter {
   }
 
   _disconnect() {
+    this.cli.connection.removeListener('close', this._connectionCloseListener);
     this.cli.connection.close();
     this.cli.connection = null;
   }