improved app asset management and retrying to acquire

Limelight/Network/AppAssetManager.m

@@ -0,0 +1,57 @@
+//
+//  AppManager.m
+//  Limelight
+//
+//  Created by Diego Waxemberg on 10/25/14.
+//  Copyright (c) 2014 Limelight Stream. All rights reserved.
+//
+
+#import "AppAssetManager.h"
+#import "CryptoManager.h"
+#import "Utils.h"
+#import "HttpResponse.h"
+#import "AppAssetRetriever.h"
+
+@implementation AppAssetManager {
+    NSOperationQueue* _opQueue;
+    id<AppAssetCallback> _callback;
+    Host* _host;
+    NSMutableDictionary* _imageCache;
+}
+
+- (id) initWithCallback:(id<AppAssetCallback>)callback {
+    self = [super init];
+    _callback = callback;
+    _opQueue = [[NSOperationQueue alloc] init];
+    _imageCache = [[NSMutableDictionary alloc] init];
+
+    return self;
+}
+
+- (void) retrieveAssets:(NSArray*)appList fromHost:(Host*)host {
+    Host* oldHost = _host;
+    _host = host;
+    BOOL useCache = [oldHost.uuid isEqualToString:_host.uuid];
+    NSLog(@"Using cached app images: %d", useCache);
+    if (!useCache) {
+        [_imageCache removeAllObjects];
+    }
+    for (App* app in appList) {
+        AppAssetRetriever* retriever = [[AppAssetRetriever alloc] init];
+        retriever.app = app;
+        retriever.host = _host;
+        retriever.callback = _callback;
+        retriever.cache = useCache ? _imageCache : nil;
+        [_opQueue addOperation:retriever];
+    }
+}
+
+- (void) stopRetrieving {
+    [_opQueue cancelAllOperations];
+}
+
+- (void) sendCallBackForApp:(App*)app {
+    [_callback receivedAssetForApp:app];
+}
+
+@end