WIP7NotificationCenter.m

/* $Id$ */

/*
 *  Copyright (c) 2008-2009 Axel Andersson
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. 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 AUTHOR ``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 AUTHOR 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.
 */

#import <WiredNetworking/WIP7Message.h>
#import <WiredNetworking/WIP7NotificationCenter.h>

@interface WIP7Notification : WIObject {
@public
                id                                                                                              _observer;
                NSString                                                        *_messageName;
                WIP7UInt32                                                      _transaction;
                SEL                                                                                             _selector;
}

@end


@implementation WIP7Notification

- (void)dealloc {
                [_messageName release];
                
                [super dealloc];
}

@end



@implementation WIP7NotificationCenter

- (id)init {
                self = [super init];
                
                _messageNameObservers = [[NSMutableArray alloc] init];
                _transactionObservers = [[NSMutableArray alloc] init];

                return self;
}



- (void)dealloc {
                [_messageNameObservers release];
                [_transactionObservers release];
                
                [super dealloc];
}



#pragma mark -

- (void)setTransactionFieldName:(NSString *)transactionFieldName {
                [transactionFieldName retain];
                [_transactionFieldName release];
                
                _transactionFieldName = transactionFieldName;
}



- (NSString *)transactionFieldName {
                return _transactionFieldName;
}



#pragma mark -

- (void)addObserver:(id)observer selector:(SEL)selector messageName:(NSString *)messageName {
                WIP7Notification                                *notification;
                
                notification = [[WIP7Notification alloc] init];
                notification->_observer = observer;
                notification->_messageName = [messageName retain];
                notification->_selector = selector;
                [_messageNameObservers addObject:notification];
                [notification release];
}



- (void)addObserver:(id)observer selector:(SEL)selector message:(WIP7Message *)message {
                WIP7Notification                                *notification;
                WIP7UInt32                                                      transaction;
                
                if(_transactionFieldName && [message getUInt32:&transaction forName:_transactionFieldName]) {
                                notification = [[WIP7Notification alloc] init];
                                notification->_observer = observer;
                                notification->_transaction = transaction;
                                notification->_selector = selector;
                                [_transactionObservers addObject:notification];
                                [notification release];
                }
}



- (void)removeObserver:(id)observer messageName:(NSString *)messageName {
                WIP7Notification                                *notification;
                NSUInteger                                                      i, count;
                
                count = [_messageNameObservers count];
                
                for(i = 0; i < count; i++) {
                                notification = [_messageNameObservers objectAtIndex:i];
                                
                                if(notification->_observer == observer &&
                                   [notification->_messageName isEqualToString:messageName]) {
                                                [_messageNameObservers removeObjectAtIndex:i];
                                                
                                                i--;
                                                count--;
                                }
                }
}



- (void)removeObserver:(id)observer message:(WIP7Message *)message {
                WIP7Notification                                *notification;
                WIP7UInt32                                                      transaction;
                NSUInteger                                                      i, count;
                
                if(_transactionFieldName && [message getUInt32:&transaction forName:_transactionFieldName]) {
                                count = [_transactionObservers count];
                                
                                for(i = 0; i < count; i++) {
                                                notification = [_transactionObservers objectAtIndex:i];
                                                
                                                if(notification->_observer == observer &&
                                                   notification->_transaction == transaction) {
                                                                [_transactionObservers removeObjectAtIndex:i];
                                                                
                                                                i--;
                                                                count--;
                                                }
                                }
                }
}



- (void)removeObserver:(id)observer {
                WIP7Notification                                *notification;
                NSUInteger                                                      i, count;
                
                count = [_messageNameObservers count];
                
                for(i = 0; i < count; i++) {
                                notification = [_messageNameObservers objectAtIndex:i];
                                
                                if(notification->_observer == observer) {
                                                [_messageNameObservers removeObjectAtIndex:i];
                                                
                                                i--;
                                                count--;
                                }
                }

                count = [_transactionObservers count];
                
                for(i = 0; i < count; i++) {
                                notification = [_transactionObservers objectAtIndex:i];
                                
                                if(notification->_observer == observer) {
                                                [_transactionObservers removeObjectAtIndex:i];
                                                
                                                i--;
                                                count--;
                                }
                }
}



- (void)postMessage:(WIP7Message *)message {
                NSString                                                        *messageName;
                WIP7Notification                                *notification;
                NSUInteger                                                      i;
                WIP7UInt32                                                      transaction;
                BOOL                                                                            posted = NO;

                if(_transactionFieldName && [message getUInt32:&transaction forName:_transactionFieldName]) {
                                for(i = 0; i < [_transactionObservers count]; i++) {
                                                notification = [_transactionObservers objectAtIndex:i];
                                                
                                                if(notification->_transaction == transaction) {
                                                                [notification->_observer performSelector:notification->_selector withObject:message];
                                                                
                                                                posted = YES;
                                                }
                                }
                }
                
                if(!posted) {
                                messageName = [message name];
                                
                                if(messageName) {
                                                for(i = 0; i < [_messageNameObservers count]; i++) {
                                                                notification = [_messageNameObservers objectAtIndex:i];
                                                                
                                                                if([notification->_messageName isEqualToString:messageName])
                                                                                [notification->_observer performSelector:notification->_selector withObject:message];
                                                }
                                }
                }
}

@end