Synnefo » Pithos MacOS Client

//

//  PithosAccountNode.m

//  pithos-macos

//

// Copyright 2011 GRNET S.A. 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 GRNET S.A. ``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 GRNET S.A OR

// CONTRIBUTORS 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.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

#import "PithosSharingAccountsNode.h"

#import "PithosAccountNode.h"

#import "ASIPithosRequest.h"

#import "ASIPithosAccount.h"

#import "ASIDownloadCache.h"

#import "PithosFileUtilities.h"

@implementation PithosSharingAccountsNode

#pragma mark -

#pragma mark Object Lifecycle

- (id)init {

    if ((self == [super init])) {

        self.sharingAccount = @"";

    }

    return self;

}

- (void)dealloc {

    [sharingAccountsRequest clearDelegatesAndCancel];

    [sharingAccountsRequest release];

    [sharingAccounts release];

    [super dealloc];

}

#pragma mark -

#pragma mark Properties

- (NSString *)url {

    if (url == nil) 

        url = [[ASIPithosRequest storageURLPrefix] copy];

    return url;

}

- (NSArray *)children {

    @synchronized(self) {

        switch (freshness) {

            case PithosNodeStateFresh:

                break;

            case PithosNodeStateRefreshNeeded:

                freshness = PithosNodeStateRefreshing;

                sharingAccountsRequest = [[ASIPithosRequest listSharingAccountsRequestWithLimit:0 

                                                                                         marker:nil] retain];

                sharingAccountsRequest.delegate = self;

                sharingAccountsRequest.didFinishSelector = @selector(sharingAccountsRequestFinished:);

                sharingAccountsRequest.didFailSelector = @selector(sharingAccountsRequestFailed:);

                sharingAccountsRequest.downloadCache = [ASIDownloadCache sharedCache];

                [sharingAccountsRequest startAsynchronous];

                break;

            case PithosNodeStateRefreshing:

                break;

            case PithosNodeStateRefreshFinished:

                if (newChildren) {

                    [children release];

                    children = newChildren;

                    newChildren = nil;

                }

                freshness = PithosNodeStateFresh;

            default:

                break;

        }

        return children;

    }

}

- (NSString *)displayName {

    if (displayName == nil)

        return [NSString stringWithString:@"sharing accounts"];

    return [[displayName copy] autorelease];

}

#pragma mark -

#pragma mark ASIHTTPRequestDelegate

- (void)sharingAccountsRequestFinished:(ASIPithosRequest *)request {

    NSLog(@"URL: %@", [sharingAccountsRequest url]);

    NSLog(@"cached: %d", [sharingAccountsRequest didUseCachedResponse]);

    NSArray *someSharingAccounts = [sharingAccountsRequest sharingAccounts];

    if (sharingAccounts == nil) {

        sharingAccounts = [[NSMutableArray alloc] initWithArray:someSharingAccounts];

    } else {

        [sharingAccounts addObjectsFromArray:someSharingAccounts];

    }

    if ([someSharingAccounts count] < 10000) {

        if (!sharingAccountsRequest.didUseCachedResponse || ([sharingAccounts count] != [someSharingAccounts count]) || !children) {

            // Save new children

            NSLog(@"using newChildren");

            newChildren = [[NSMutableArray alloc] init];

            NSMutableIndexSet *keptNodes = [NSMutableIndexSet indexSet];

            for (ASIPithosAccount *account in sharingAccounts) {

                if (![account.name isEqualToString:[ASIPithosRequest authUser]]) {

                    PithosAccountNode *node = [[[PithosAccountNode alloc] init] autorelease];

                    node.parent = self;

                    node.shared = shared;

                    node.sharingAccount = account.name;

                    if (children) {

                        NSUInteger oldIndex = [children indexOfObject:node];

                        if (oldIndex != NSNotFound) {

                            // Use the same pointer value, if possible

                            node = [children objectAtIndex:oldIndex];

                            [keptNodes addIndex:oldIndex];

                        }

                    }

                    [newChildren addObject:node];

                }

            }

            [[children objectsAtIndexes:

              [[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [children count])] indexesPassingTest:^(NSUInteger idx, BOOL *stop){

                if ([keptNodes containsIndex:idx])

                    return NO;

                return YES;

            }]] makeObjectsPerformSelector:@selector(pithosNodeWillBeRemoved)];

        }

        // Else cache was used and all results were fetched during this request, so existing children can be reused

        [sharingAccountsRequest release];

        sharingAccountsRequest = nil;

        [sharingAccounts release];

        sharingAccounts = nil;

        @synchronized(self) {

            freshness = PithosNodeStateRefreshFinished;

        }

        // Notify observers that children are updated

        [[NSNotificationCenter defaultCenter] postNotificationName:@"PithosSharingAccountsNodeChildrenUpdated" object:self];

    } else {

        [sharingAccountsRequest release];

        // Do an additional request to fetch more objects

        sharingAccountsRequest = [[ASIPithosRequest listSharingAccountsRequestWithLimit:0 

                                                                                 marker:[[someSharingAccounts lastObject] name]] retain];

        sharingAccountsRequest.delegate = self;

        sharingAccountsRequest.downloadCache = [ASIDownloadCache sharedCache];

        [sharingAccountsRequest startAsynchronous];

    }

}

- (void)accountRequestFailed:(ASIPithosRequest *)request {

    [PithosFileUtilities httpRequestErrorAlertWithRequest:request];

    [newChildren release];

    newChildren = nil;

    [sharingAccountsRequest release];

    sharingAccountsRequest = nil;

    [sharingAccounts release];

    sharingAccounts = nil;

    @synchronized(self) {

        freshness = PithosNodeStateRefreshNeeded;

    }

}

@end