Lab_interaccio/2012/Edgard/Vdossier01/WiFly/WiFlyClient.cpp

#include "WiFly.h"
#include "WiFlyClient.h"

WiFlyClient::WiFlyClient(uint8_t *ip, uint16_t port) :
  _WiFly (WiFly) {
  //stream (ParsedStream(SpiSerial)) {
  // TODO: Find out why neither of the following work as expected.
  //       (The result of `read()` is always -1. )
  //stream (ParsedStream(_WiFly.uart)) {
  //stream (ParsedStream(WiFly.uart)) {
  /*
   */

  _ip = ip;
  _port = port;
  _domain = NULL;

  isOpen = false;
}


WiFlyClient::WiFlyClient(const char* domain, uint16_t port) :
  _WiFly (WiFly)  {
  //stream (ParsedStream(SpiSerial)) {
  // TODO: Find out why neither of the following work as expected.
  //       (The result of `read()` is always -1. )
  //stream (ParsedStream(_WiFly.uart)) {
  //stream (ParsedStream(WiFly.uart)) {
  /*
   */
  _ip = NULL;
  _port = port;
  _domain = domain;

  isOpen = false;
}


size_t  WiFlyClient::write(byte value) {
  /*
   */
  _WiFly.uart->write(value);
  return 1;
}


size_t  WiFlyClient::write(const uint8_t *buffer, size_t size) {
  /*
   */
	while(size--)
		_WiFly.uart->write(*buffer++);
	return size;
}


boolean WiFlyClient::connect() {
  /*
   */

  stream.begin(_WiFly.uart);

  // Handle case when Null object returned from Server.available()
  if (!this) {
    return false;
  }

  // TODO: Implement this better

  stream.reset();

  if ((_ip == NULL) && (_domain == NULL)) {
    // This is a connection started by the Server class
    // so the connection is already established.
  } else {
    // TODO: Track state more?
    _WiFly.enterCommandMode();
    
    _WiFly.sendCommand("open ", true, "" /* TODO: Remove this dummy value */);
    
    if (_ip != NULL) {
      for (int index = 0; /* break inside loop*/ ; index++) {
        _WiFly.uart->print(_ip[index], DEC);
        if (index == 3) {
          break;
        }
        _WiFly.uart->print('.');
      }
    } else if (_domain != NULL) {
      _WiFly.uart->print(_domain);
    } else {
      while (1) {
        // This should never happen
      }
    }
    
    _WiFly.uart->print(" ");
    
    _WiFly.uart->print(_port, DEC);
    
    _WiFly.sendCommand("", false, "*OPEN*");
    
    // TODO: Handle connect failure
  }
  
  isOpen = true;
  return true;
}


int WiFlyClient::available() {
  /*
   */
  if (!isOpen) {
    return 0;
  }
  return stream.available();
}


int WiFlyClient::read() {
  /*
   */
  if (!isOpen) {
    return -1;
  }
  return stream.read();
}

int WiFlyClient::peek() {
  if (!isOpen) {
    return -1;
  }
  return stream.peek();
}

void WiFlyClient::flush(void) {
  /*
   */
  if (!isOpen) {
    return;
  }

  while (stream.available() > 0) {
    stream.read();
  }
}


bool WiFlyClient::connected() {
  /*
   */
  // TODO: Set isOpen to false once we know the stream is closed?
  return isOpen && !stream.closed();
}


void WiFlyClient::stop() {
  /*
   */
  // TODO: Work out if there's some unintended compatibility issues
  //       related to interactions between `stop()`, `connected()` and
  //       `available()`.

  // This stop implementation is suboptimal. We need to handle the case
  // of a server connection differently to a client connection.
  // We also need to handle better detecting if the connection is already
  // closed.
  // In the interests of getting something out the door--that somewhat
  // works--this is what we're going with at the moment.

  _WiFly.enterCommandMode();
  _WiFly.uart->println("close");
  // We ignore the response which could be "*CLOS*" or could be an
  // error if the connection is no longer open.

  _WiFly.uart->println("exit"); // TODO: Fix this hack which is a workaround for the fact the closed connection isn't detected properly, it seems. Even with this there's a delay between reconnects needed.
  _WiFly.findInResponse("EXIT",1000);
  //_WiFly.skipRemainderOfResponse();
  // As a result of this, unwanted data gets sent to /dev/null rather than
  // confusing the WiFly which tries to interpret it as commands.

  stream.reset();
  _WiFly.uart->flush();

  // This doesn't really work because the object gets copied in the
  // WeWiFlyClient example code.
  isOpen = false; 
  // _port = 0;

  // So instead we mark any server connection as inactive.
  // TODO: Only do this if this was a server client connection
  _WiFly.serverConnectionActive = false;
}


WiFlyClient::operator bool() {
  /*
   */
  // NOTE: In keeping with the Ethernet WiFlyClient class
  //       we use _ip == NULL, _domain == NULL, _port = 0 to
  //       indicate Server.available() found no connection.
  //       We use _ip == NULL, _domain == NULL, _port !=0 to
  //       indicate a server connection from a client.
  return !((_ip == NULL) && (_domain == NULL) && (_port == 0));
}

// TODO: Add == and != operators for compatibility with Ethernet WiFlyClient?