diff -r 000000000000 -r cb9cdf247239 Bonjour/MYBonjourBrowser.m
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Bonjour/MYBonjourBrowser.m	Wed Apr 22 16:45:39 2009 -0700
@@ -0,0 +1,239 @@
+//
+//  MYBonjourBrowser.m
+//  MYNetwork
+//
+//  Created by Jens Alfke on 1/22/08.
+//  Copyright 2008 Jens Alfke. All rights reserved.
+//
+
+#import "MYBonjourBrowser.h"
+#import "MYBonjourService.h"
+#import "Test.h"
+#import "Logging.h"
+
+
+@interface MYBonjourBrowser ()
+@property BOOL browsing;
+@property (retain) NSError* error;
+@end
+
+
+@implementation MYBonjourBrowser
+
+
+- (id) initWithServiceType: (NSString*)serviceType
+{
+    Assert(serviceType);
+    self = [super init];
+    if (self != nil) {
+        _serviceType = [serviceType copy];
+        _browser = [[NSNetServiceBrowser alloc] init];
+        _browser.delegate = self;
+        _services = [[NSMutableSet alloc] init];
+        _addServices = [[NSMutableSet alloc] init];
+        _rmvServices = [[NSMutableSet alloc] init];
+        _serviceClass = [MYBonjourService class];
+    }
+    return self;
+}
+
+
+- (void) dealloc
+{
+    LogTo(Bonjour,@"DEALLOC BonjourBrowser");
+    [_browser stop];
+    _browser.delegate = nil;
+    [_browser release];
+    [_serviceType release];
+    [_error release];
+    [_services release];
+    [_addServices release];
+    [_rmvServices release];
+    [super dealloc];
+}
+
+
+@synthesize browsing=_browsing, error=_error, services=_services, serviceClass=_serviceClass;
+
+
+- (void) start
+{
+    [_browser searchForServicesOfType: _serviceType inDomain: @"local."];
+}
+
+- (void) stop
+{
+    [_browser stop];
+}
+
+
+- (void)netServiceBrowserWillSearch:(NSNetServiceBrowser *)netServiceBrowser
+{
+    LogTo(Bonjour,@"%@ started browsing",self);
+    self.browsing = YES;
+}
+
+- (void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)netServiceBrowser
+{
+    LogTo(Bonjour,@"%@ stopped browsing",self);
+    self.browsing = NO;
+}
+
+- (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser 
+             didNotSearch:(NSDictionary *)errorDict
+{
+    NSString *domain = [errorDict objectForKey: NSNetServicesErrorDomain];
+    int err = [[errorDict objectForKey: NSNetServicesErrorCode] intValue];
+    self.error = [NSError errorWithDomain: domain code: err userInfo: nil];
+    LogTo(Bonjour,@"%@ got error: ",self,self.error);
+    self.browsing = NO;
+}
+
+
+- (void) _updateServiceList
+{
+    if( _rmvServices.count ) {
+        [self willChangeValueForKey: @"services" 
+                    withSetMutation: NSKeyValueMinusSetMutation
+                       usingObjects: _rmvServices];
+        [_services minusSet: _rmvServices];
+        [self didChangeValueForKey: @"services" 
+                   withSetMutation: NSKeyValueMinusSetMutation
+                      usingObjects: _rmvServices];
+        [_rmvServices makeObjectsPerformSelector: @selector(removed)];
+        [_rmvServices removeAllObjects];
+    }
+    if( _addServices.count ) {
+        [_addServices makeObjectsPerformSelector: @selector(added)];
+        [self willChangeValueForKey: @"services" 
+                    withSetMutation: NSKeyValueUnionSetMutation
+                       usingObjects: _addServices];
+        [_services unionSet: _addServices];
+        [self didChangeValueForKey: @"services" 
+                   withSetMutation: NSKeyValueUnionSetMutation
+                      usingObjects: _addServices];
+        [_addServices removeAllObjects];
+    }
+}
+
+
+- (void) _handleService: (NSNetService*)netService 
+                  addTo: (NSMutableSet*)addTo
+             removeFrom: (NSMutableSet*)removeFrom
+             moreComing: (BOOL)moreComing
+{
+    // Wrap the NSNetService in a BonjourService, using an existing instance if possible:
+    MYBonjourService *service = [[_serviceClass alloc] initWithNetService: netService];
+    MYBonjourService *existingService = [_services member: service];
+    if( existingService ) {
+        [service release];
+        service = [existingService retain];
+    }
+    
+    if( [removeFrom containsObject: service] )
+        [removeFrom removeObject: service];
+    else
+        [addTo addObject: service];
+    [service release];
+    if( ! moreComing )
+        [self _updateServiceList];
+}
+
+- (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser 
+           didFindService:(NSNetService *)netService
+               moreComing:(BOOL)moreComing 
+{
+    //LogTo(Bonjour,@"Add service %@",netService);
+    [self _handleService: netService addTo: _addServices removeFrom: _rmvServices moreComing: moreComing];
+}
+
+- (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser 
+         didRemoveService:(NSNetService *)netService 
+               moreComing:(BOOL)moreComing 
+{
+    //LogTo(Bonjour,@"Remove service %@",netService);
+    [self _handleService: netService addTo: _rmvServices removeFrom: _addServices moreComing: moreComing];
+}
+
+
+@end
+
+
+
+#pragma mark -
+#pragma mark TESTING:
+
+@interface BonjourTester : NSObject
+{
+    MYBonjourBrowser *_browser;
+}
+@end
+
+@implementation BonjourTester
+
+- (id) init
+{
+    self = [super init];
+    if (self != nil) {
+        _browser = [[MYBonjourBrowser alloc] initWithServiceType: @"_http._tcp"];
+        [_browser addObserver: self forKeyPath: @"services" options: NSKeyValueObservingOptionNew context: NULL];
+        [_browser addObserver: self forKeyPath: @"browsing" options: NSKeyValueObservingOptionNew context: NULL];
+        [_browser start];
+    }
+    return self;
+}
+
+- (void) dealloc
+{
+    [_browser stop];
+    [_browser removeObserver: self forKeyPath: @"services"];
+    [_browser removeObserver: self forKeyPath: @"browsing"];
+    [_browser release];
+    [super dealloc];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
+{
+    LogTo(Bonjour,@"Observed change in %@: %@",keyPath,change);
+    if( $equal(keyPath,@"services") ) {
+        if( [[change objectForKey: NSKeyValueChangeKindKey] intValue]==NSKeyValueChangeInsertion ) {
+            NSSet *newServices = [change objectForKey: NSKeyValueChangeNewKey];
+            for( MYBonjourService *service in newServices ) {
+                LogTo(Bonjour,@"    --> %@ : TXT=%@", service,service.txtRecord);
+            }
+        }
+    }
+}
+
+@end
+
+TestCase(Bonjour) {
+    [NSRunLoop currentRunLoop]; // create runloop
+    BonjourTester *tester = [[BonjourTester alloc] init];
+    [[NSRunLoop currentRunLoop] runUntilDate: [NSDate dateWithTimeIntervalSinceNow: 15]];
+    [tester release];
+}
+
+
+
+/*
+ Copyright (c) 2008-2009, Jens Alfke <jens@mooseyard.com>. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification, are permitted
+ provided that the following conditions are met:
+ 
+ * Redistributions of source code must retain the above copyright notice, this list of conditions
+ and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
+ and the following disclaimer in the documentation and/or other materials provided with the
+ distribution.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
+ FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
+ BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
+ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */