Supports polling for updates

kordophone/Bridge/Operations/MBIMUpdatePollOperation.m

@@ -0,0 +1,39 @@
+//
+//  MBIMUpdatePollOperation.m
+//  kordophoned
+//
+//  Created by James Magahern on 11/16/18.
+//  Copyright © 2018 James Magahern. All rights reserved.
+//
+
+#import "MBIMUpdatePollOperation.h"
+#import "MBIMUpdateQueue.h"
+#import "IMMessageItem+Encoded.h"
+
+@implementation MBIMUpdatePollOperation
+
++ (void)load { [super load]; }
+
++ (NSString *)endpointName
+{
+    return @"pollUpdates";
+}
+
+- (void)main
+{
+    MBIMUpdateConsumer consumer = ^(MBIMUpdateItem *nextUpdateItem) {
+        NSDictionary *updateDict = @{
+            @"guid"    : [[nextUpdateItem changedChat] guid],
+            @"message" : [[nextUpdateItem message] mbim_dictionaryRepresentation]
+        };
+        
+        MBIMJSONDataResponse *response = [MBIMJSONDataResponse responseWithJSONObject:updateDict];
+        self.serverCompletionBlock(response);
+    };
+    
+    [[MBIMUpdateQueue sharedInstance] addConsumer:consumer];
+}
+
+// TODO: cancel needs to remove the consumer from the update queue
+
+@end