Add guts of 'EchoServer' state machine. (Currently unused.)

git-svn-id: svn+ssh://oldsvn/home/mlalondesvn/svn/cral@121 3ee9b42a-b53c-0410-a25e-f0b6218d5d5b

branches/follower/wiz810mj/src/demo/WizDemo4/WizDemo4.pde

@@ -423,6 +423,7 @@ class EchoServer {
   
   public:
     EchoServer(int port);
+    void next(); // TODO: Return something useful?
     
   private:
     NetworkConnection _connection; // TODO: Make public?
@@ -439,6 +440,41 @@ EchoServer::EchoServer(int port) : _connection (NetworkConnection(port)) {
   _connection.listen(); // TODO: We should be using Network.listen(...) here and in initialisation list.
 }
   
+void EchoServer::next() {
+  /*
+  
+   */
+
+  // TODO: Use better state machine implementation?
+   
+  if (_state == ECHO_CONNECT_WAIT) {
+    
+    if (_connection.isConnected()) {
+      _state = ECHO_CONNECTED;
+    } else {
+      // Keep waiting
+    }
+    
+  } else if (_state == ECHO_CONNECTED) {
+    
+    if (_connection.available()) {
+      _connection.print(_connection.read());
+    } else if (!_connection.isConnected()) {
+       // Data finished and client disconnected 
+       _state == ECHO_CLOSE;
+    }
+
+  } else if (_state == ECHO_CLOSE) {
+
+    _connection.close();
+    _state = ECHO_HALT;    
+
+  } else if (_state == ECHO_HALT) {
+      // Do nothing
+  } else {
+    // Unknown state, do nothing.
+  }  
+}
   
 /* ----------------------- */