/*

     File: Images.m

 Abstract: Images is the controller for displaying the list of ImageFile objects. In addition to holding on to the ImageFile instances, it will load the window, and also flash its flashView when a miss occurs in any of the ImageFile instances it's keeping.

  Version: 1.0

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 */

#import "Images.h"

#import "ImageFile.h"

@interface Images ()

@property(readwrite, copy) NSString *lastMiss;  // Redeclaration of property as readwrite

@end

@implementation Images

@synthesize lastMiss, imageFiles;

/* We enumerate the folder, and create instances of the Image class for each image file. If an error occurs while enumerating the folder, nil is returned and *errorPtr is set to an appropriate NSError.

*/

- (id)initWithContentsOfFolder:(NSString *)folder error:(NSError **)errorPtr {

    NSArray *files = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folder error:errorPtr];

    if (!files) {

        [self release];

    return nil; // This will have set *errorPtr

    }

    if (self = [super init]) {

        NSArray *imageTypes = [NSImage imageFileTypes];

        NSNotificationCenter *noteCenter = [NSNotificationCenter defaultCenter];

    imageFiles = [[NSMutableArray alloc] init];

    for (NSString *path in files) {

        if ([imageTypes containsObject:[path pathExtension]]) {

        ImageFile *imageFile = [[ImageFile alloc] initWithPath:[folder stringByAppendingPathComponent:path]];

        if (imageFile) {

            [imageFiles addObject:imageFile];

            // We observe all the images in this window for cache misses

                    [noteCenter addObserver:self selector:@selector(didMissCache:) name:ImageFileDidMissCacheNotification object:imageFile];

            [imageFile release];

        }

        }

    }

    // So far so good; load the UI

    (void)[NSBundle loadNibNamed:@"Images" owner:self];

        [[flashView window] makeKeyAndOrderFront:nil];

    }

    return self;

}

- (void)dealloc {

    [[NSNotificationCenter defaultCenter] removeObserver:self];

    self.lastMiss = nil;

    [imageFiles release];

    [super dealloc];

}

- (void)didMissCache:(NSNotification *)note {

    // Cache miss causes a flash and displays the name of the missed image

    self.lastMiss = [[note object] name];

    [flashView flash:nil];

}

@end