/* This code is licensed in the Public Domain. Please contribute any fixes back to hakan@konstochvanligasaker.se 
   See http://konstochvanligasaker.se/code for det latest version. */
   
#import <Cocoa/Cocoa.h>

@interface NSObject (BatchDownloaderDelegate)

// fired when one or more downloads are ready. The array contains a dictionary
// with URLs as the keys, and the local file paths as the keys.
- (void)downloadsReady:(NSDictionary *)downloads;

// array of URLs that could not be downloaded.
- (void)downloadsFailed:(NSArray *)downloads;

@end


@interface BatchDownloader : NSObject 
{
  // fast (constant-time) lookup for a URL, just given a download object. 
  // unfortunately we can't just use a dictionary with NSURLDownloads as keys, because it doesn't 
  // implement the NSCopying protocol.
  NSMutableDictionary *downloadPtrsToURLs;
  
  // URL => NSURLDownload 
  NSMutableDictionary *downloadURLsToObjects;
  
  // URL => local file path
  NSMutableDictionary *downloadURLsToLocalPaths;
  
  id delegate;
  
  NSString *destinationFolder;
}

// will try to create dest folder if it doesn't exist.
- (id)initWithDestinationFolder:(NSString *)path delegate:(id)delegate;

- (void)addDownload:(NSString *)URL;
- (void)addDownloads:(NSArray *)URLs;

@end