root/branches/perian-1.1/Update Checker Sources/SUAppcast.m

//
//  SUAppcast.m
//  Sparkle
//
//  Created by Andy Matuschak on 3/12/06.
//  Copyright 2006 Andy Matuschak. All rights reserved.
//

#import "SUAppcast.h"
#import "SUAppcastItem.h"
#import "SUUtilities.h"
#import "RSS.h"

@implementation SUAppcast

- (void)fetchAppcastFromURL:(NSURL *)url
{
        [NSThread detachNewThreadSelector:@selector(_fetchAppcastFromURL:) toTarget:self withObject:url]; // let's not block the main thread
}

- (void)setDelegate:del
{
        delegate = del;
}

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

- (SUAppcastItem *)newestItem
{
        return [items objectAtIndex:0]; // the RSS class takes care of sorting by published date, descending.
}

- (NSArray *)items
{
        return items;
}

- (void)_fetchAppcastFromURL:(NSURL *)url
{
        NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
        
        RSS *feed;
        @try
        {
                NSString *userAgent = [NSString stringWithFormat: @"%@/%@ (Mac OS X) Sparkle/1.0", SUHostAppName(), SUHostAppVersion()];
                
                feed = [[RSS alloc] initWithURL:url normalize:YES userAgent:userAgent];
                // Set up all the appcast items
                NSMutableArray *tempItems = [NSMutableArray array];
                id enumerator = [[feed newsItems] objectEnumerator], current;
                while ((current = [enumerator nextObject]))
                {
                        [tempItems addObject:[[[SUAppcastItem alloc] initWithDictionary:current] autorelease]];
                }
                items = [[NSArray arrayWithArray:tempItems] retain];
                [feed release];
                
                if ([delegate respondsToSelector:@selector(appcastDidFinishLoading:)])
                        [delegate performSelectorOnMainThread:@selector(appcastDidFinishLoading:) withObject:self waitUntilDone:NO];
                
        }
        @catch (NSException *e)
        {
                if ([delegate respondsToSelector:@selector(appcastDidFailToLoad:)])
                        [delegate performSelectorOnMainThread:@selector(appcastDidFailToLoad:) withObject:self waitUntilDone:NO];
        }
        @finally
        {
                [pool release]; 
        }
}

@end