code.grnet.gr Git - pithos-macos/blob - pithos-macos/PithosAccountNode.m

   1 //
   2 //  PithosAccountNode.m
   3 //  pithos-macos
   4 //
   5 // Copyright 2011 GRNET S.A. All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or
   8 // without modification, are permitted provided that the following
   9 // conditions are met:
  10 //
  11 //   1. Redistributions of source code must retain the above
  12 //      copyright notice, this list of conditions and the following
  13 //      disclaimer.
  14 //
  15 //   2. Redistributions in binary form must reproduce the above
  16 //      copyright notice, this list of conditions and the following
  17 //      disclaimer in the documentation and/or other materials
  18 //      provided with the distribution.
  19 //
  20 // THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  21 // OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  24 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 // USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28 // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29 // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30 // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31 // POSSIBILITY OF SUCH DAMAGE.
  32 //
  33 // The views and conclusions contained in the software and
  34 // documentation are those of the authors and should not be
  35 // interpreted as representing official policies, either expressed
  36 // or implied, of GRNET S.A.
  37
  38 #import "PithosAccountNode.h"
  39 #import "PithosContainerNode.h"
  40 #import "ASIPithosAccountRequest.h"
  41 #import "ASIPithosContainer.h"
  42 #import "ASIDownloadCache.h"
  43 #import "PithosFileUtilities.h"
  44
  45 @implementation PithosAccountNode
  46
  47 #pragma mark -
  48 #pragma mark Object Lifecycle
  49
  50 - (void)dealloc {
  51     [accountRequest clearDelegatesAndCancel];
  52     [accountRequest release];
  53     [containers release];
  54     [super dealloc];
  55 }
  56
  57 #pragma mark -
  58 #pragma mark Properties
  59
  60 - (NSString *)url {
  61     if (url == nil)
  62         url = [[ASIPithosRequest storageURL] copy];
  63     return url;
  64 }
  65
  66 - (NSArray *)children {
  67     @synchronized(self) {
  68         switch (freshness) {
  69             case PithosNodeStateFresh:
  70                 break;
  71             case PithosNodeStateRefreshNeeded:
  72                 freshness = PithosNodeStateRefreshing;
  73                 accountRequest = [[ASIPithosAccountRequest listContainersRequestWithLimit:0
  74                                                                                    marker:nil
  75                                                                                    shared:shared
  76                                                                                     until:nil] retain];
  77                 accountRequest.delegate = self;
  78                 accountRequest.didFinishSelector = @selector(accountRequestFinished:);
  79                 accountRequest.didFailSelector = @selector(accountRequestFailed:);
  80                 accountRequest.downloadCache = [ASIDownloadCache sharedCache];
  81                 [accountRequest startAsynchronous];
  82                 break;
  83             case PithosNodeStateRefreshing:
  84                 break;
  85             case PithosNodeStateRefreshFinished:
  86                 if (newChildren) {
  87                     [children release];
  88                     children = newChildren;
  89                     newChildren = nil;
  90                 }
  91                 freshness = PithosNodeStateFresh;
  92             default:
  93                 break;
  94         }
  95         return children;
  96     }
  97 }
  98
  99 - (NSString *)displayName {
 100     if (displayName == nil) {
 101         displayName = [[NSString alloc] initWithString:@"account"];
 102     }
 103     return displayName;
 104 }
 105
 106 #pragma mark -
 107 #pragma mark ASIHTTPRequestDelegate
 108
 109 - (void)accountRequestFinished:(ASIPithosAccountRequest *)request {
 110     NSLog(@"URL: %@", [accountRequest url]);
 111     NSLog(@"cached: %d", [accountRequest didUseCachedResponse]);
 112
 113     NSArray *someContainers = [accountRequest containers];
 114     if (containers == nil) {
 115         containers = [[NSMutableArray alloc] initWithArray:someContainers];
 116     } else {
 117         [containers addObjectsFromArray:someContainers];
 118     }
 119     if ([someContainers count] < 10000) {
 120         if (!accountRequest.didUseCachedResponse || ([containers count] != [someContainers count]) || !children) {
 121             // Save new children
 122             NSLog(@"using newChildren");
 123             newChildren = [[NSMutableArray alloc] init];
 124             for (ASIPithosContainer *container in containers) {
 125                 PithosContainerNode *node = [[[PithosContainerNode alloc] initWithPithosContainer:container] autorelease];
 126                 if (children) {
 127                     NSUInteger oldIndex = [children indexOfObject:node];
 128                     if (oldIndex != NSNotFound) {
 129                         // Use the same pointer value, if possible
 130                         node = [children objectAtIndex:oldIndex];
 131                         node.pithosContainer = container;
 132                     }
 133                 }
 134                 node.parent = self;
 135                 node.shared = shared;
 136                 [newChildren addObject:node];
 137             }
 138         }
 139         // Else cache was used and all results were fetched during this request, so existing children can be reused
 140         [accountRequest release];
 141         accountRequest = nil;
 142         [containers release];
 143         containers = nil;
 144         @synchronized(self) {
 145             freshness = PithosNodeStateRefreshFinished;
 146         }
 147         // Notify observers that children are updated
 148         [[NSNotificationCenter defaultCenter] postNotificationName:@"PithosAccountNodeChildrenUpdated" object:self];
 149     } else {
 150         [accountRequest release];
 151         // Do an additional request to fetch more objects
 152         accountRequest = [[ASIPithosAccountRequest listContainersRequestWithLimit:0
 153                                                                            marker:[[someContainers lastObject] name]
 154                                                                            shared:shared
 155                                                                             until:nil] retain];
 156         accountRequest.delegate = self;
 157         accountRequest.downloadCache = [ASIDownloadCache sharedCache];
 158         [accountRequest startAsynchronous];
 159     }
 160 }
 161
 162 - (void)accountRequestFailed:(ASIPithosAccountRequest *)request {
 163     [PithosFileUtilities httpRequestErrorAlertWithRequest:request];
 164     [newChildren release];
 165     newChildren = nil;
 166     [accountRequest release];
 167     accountRequest = nil;
 168     [containers release];
 169     containers = nil;
 170     @synchronized(self) {
 171         freshness = PithosNodeStateRefreshNeeded;
 172     }
 173 }
 174
 175 @end