//

 //  BLIPEchoClient.m

 //  MYNetwork

 //

 //  Created by Jens Alfke on 5/24/08.

 //  Copyright 2008 Jens Alfke. All rights reserved.

 //  Adapted from Apple sample code "CocoaEcho":

 //  http://developer.apple.com/samplecode/CocoaEcho/index.html

 //

 #import "BLIPEchoClient.h"

 #import "BLIP.h"

 #import "IPAddress.h"

 #import "Target.h"

 @implementation BLIPEchoClient

 @synthesize serviceList=_serviceList;

 - (void)awakeFromNib 

 {

     _serviceBrowser = [[NSNetServiceBrowser alloc] init];

     _serviceList = [[NSMutableArray alloc] init];

     [_serviceBrowser setDelegate:self];

     [_serviceBrowser searchForServicesOfType:@"_blipecho._tcp." inDomain:@""];

 }

 #pragma mark -

 #pragma mark BLIPConnection support

 /* Opens a BLIP connection to the given address. */

 - (void)openConnection: (IPAddress*)address 

 {

     _connection = [[BLIPConnection alloc] initToAddress: address];

     [_connection open];

 }

 /* Closes the currently open BLIP connection. */

 - (void)closeConnection

 {

     [_connection close];

     [_connection release];

     _connection = nil;

 }

 #pragma mark -

 #pragma mark NSNetServiceBrowser delegate methods

 // We broadcast the willChangeValueForKey: and didChangeValueForKey: for the NSTableView binding to work.

 - (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {

     if (![_serviceList containsObject:aNetService]) {

         [self willChangeValueForKey:@"serviceList"];

         [_serviceList addObject:aNetService];

         [self didChangeValueForKey:@"serviceList"];

     }

 }

 - (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didRemoveService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {

     if ([_serviceList containsObject:aNetService]) {

         [self willChangeValueForKey:@"serviceList"];

         [_serviceList removeObject:aNetService];

         [self didChangeValueForKey:@"serviceList"];

     }

 }

 #pragma mark -

 #pragma mark NSNetService delegate methods

 /* Stop any current Bonjour address resolution */

 - (void)stopResolving

 {

     if( _resolvingService ) {

         _resolvingService.delegate = nil;

         [_resolvingService stop];

         [_resolvingService release];

         _resolvingService = nil;

     }

 }    

 /* Ask Bonjour to resolve (look up) the IP address of the given service. */

 - (void)startResolving: (NSNetService*)service

 {

     [self stopResolving];

     _resolvingService = [service retain];

     _resolvingService.delegate = self;

     [_resolvingService resolveWithTimeout: 5.0];

 }

 /* NSNetService delegate method that will be called when address resolution finishes. */

 - (void)netServiceDidResolveAddress:(NSNetService *)sender

 {

     if( sender == _resolvingService ) {

         // Get the first address, which is an NSData containing a struct sockaddr:

         NSArray *addresses = _resolvingService.addresses;

         if( addresses.count > 0 ) {

             NSData *addressData = [addresses objectAtIndex: 0];

             IPAddress *address = [[IPAddress alloc] initWithSockAddr: addressData.bytes];

             [self openConnection: address];

             [address release];

         }

         [self stopResolving];

     }

 }

 #pragma mark -

 #pragma mark GUI action methods

 - (IBAction)serverClicked:(id)sender {

     NSTableView * table = (NSTableView *)sender;

     int selectedRow = [table selectedRow];

     [self closeConnection];

     [self stopResolving];

     if (-1 != selectedRow) {

         [self startResolving: [_serviceList objectAtIndex:selectedRow]];

     }

 }

 /* Send a BLIP request containing the string in the textfield */

 - (IBAction)sendText:(id)sender 

 {

     BLIPRequest *r = [_connection requestWithBody: nil];

     r.bodyString = [sender stringValue];

     BLIPResponse *response = [r send];

     response.onComplete = $target(self,gotResponse:);

 }

 /* Receive the response to the BLIP request, and put its contents into the response field */

 - (void) gotResponse: (BLIPResponse*)response

 {

     [responseField setObjectValue: response.bodyString];

 }    

 @end

 int main(int argc, char *argv[])

 {

     return NSApplicationMain(argc,  (const char **) argv);

 }