add empty message validation

config/example.json

@@ -105,6 +105,10 @@
                             [
                                 "\u001b[31mReached message length limit!\u001b[0m"
                             ],
+                            "empty":
+                            [
+                                "\u001b[31mMessage could not be empty!\u001b[0m"
+                            ],
                             "internal":
                             [
                                 "\u001b[31mSomething went wrong, please make your feedback!\u001b[0m",

src/Server/Ratchet.php

@@ -182,6 +182,20 @@ class Ratchet implements MessageComponentInterface
         {
             // Check message commit by dot
             if ($request == '.')
+            {
+                // Check message not empty
+                if (empty(trim($connection->message)))
+                {
+                    $connection->send(
+                        implode(
+                            PHP_EOL,
+                            $config->response->submit->failure->empty
+                        ) . PHP_EOL
+                    );
+                }
+
+                // Max length already checked on input, begin message save
+                else
                 {
                     // Save massage to KevaCoin blockchain
                     if ($txid = $this->_kevacoin->kevaPut($this->_config->kevacoin->wallet->namespace, time(), $connection->message))
@@ -243,6 +257,7 @@ class Ratchet implements MessageComponentInterface
                             ) . PHP_EOL
                         );
                     }
+                }
 
                 // Close connection at this point
                 $connection->close();