/*

    File:       PhotoGalleryContext.m

    Contains:   A managed object context subclass that carries along some photo gallery info.

    Written by: DTS

    Copyright:  Copyright (c) 2010 Apple Inc. All Rights Reserved.

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                The Apple Software is provided by Apple on an "AS IS" basis. 

                APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING

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*/

#import "PhotoGalleryContext.h"

#import "NetworkManager.h"

@implementation PhotoGalleryContext

- (id)initWithGalleryURLString:(NSString *)galleryURLString galleryCachePath:(NSString *)galleryCachePath

{

    assert(galleryURLString != nil);

    assert(galleryCachePath != nil);

    self = [super init];

    if (self != nil) {

        self->_galleryURLString = [galleryURLString copy];

        self->_galleryCachePath = [galleryCachePath copy];

    }

    return self;

}

- (void)dealloc

{

    [self->_galleryCachePath release];

    [self->_galleryURLString release];

    [super dealloc];

}

@synthesize galleryURLString = _galleryURLString;

@synthesize galleryCachePath = _galleryCachePath;

- (NSString *)photosDirectoryPath

{

    // This comes from the PhotoGallery class.  I didn't really want to include it's header 

    // here (because we are 'lower' in the architecture than PhotoGallery), and I don't want 

    // the declaration in "PhotoGalleryContext.h" either (because our public clients have 

    // no need of this).  The best solution would be to have "PhotoGalleryPrivate.h", and 

    // put all the gallery cache structure strings into that file.  But having a whole separate 

    // file just to solve that problem seems like overkill.  So, for the moment, we just 

    // declare it extern here.

    extern NSString * kPhotosDirectoryName;

    return [self.galleryCachePath stringByAppendingPathComponent:kPhotosDirectoryName];

}

- (NSMutableURLRequest *)requestToGetGalleryRelativeString:(NSString *)path

    // See comment in header.

{

    NSMutableURLRequest *   result;

    NSURL *                 url;

    assert([NSThread isMainThread]);

    assert(self.galleryURLString != nil);

    result = nil;

    // Construct the URL.

    url = [NSURL URLWithString:self.galleryURLString];

    assert(url != nil);

    if (path != nil) {

        url = [NSURL URLWithString:path relativeToURL:url];

        // url may be nil because, while galleryURLString is guaranteed to be a valid 

        // URL, path may not be.

    }

    // Call down to the network manager so that it can set up its stuff 

    // (notably the user agent string).

    if (url != nil) {

        result = [[NetworkManager sharedManager] requestToGetURL:url];

        assert(result != nil);

    }

    return result;

}

@end