Issue #79: Subscribe to Topics for iOS

src/ios/AppDelegate+notification.m

@@ -11,7 +11,6 @@
 #import <objc/runtime.h>
 
 static char launchNotificationKey;
-
 @implementation AppDelegate (notification)
 
 - (id) getCommandInstance:(NSString*)className

src/ios/PushPlugin.h

@@ -1,16 +1,16 @@
 /*
  Copyright 2009-2011 Urban Airship Inc. 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 binaryform must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided withthe distribution.
- 
+
  THIS SOFTWARE IS PROVIDED BY THE URBAN AIRSHIP INC``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
@@ -28,17 +28,18 @@
 #import <Cordova/CDVPlugin.h>
 
 @protocol GGLInstanceIDDelegate;
-@interface PushPlugin : CDVPlugin<GGLInstanceIDDelegate>
+@protocol GCMReceiverDelegate;
+@interface PushPlugin : CDVPlugin<GGLInstanceIDDelegate, GCMReceiverDelegate>
 {
     NSDictionary *notificationMessage;
     BOOL    isInline;
     NSString *notificationCallbackId;
     NSString *callback;
     BOOL    clearBadge;
-    
+
     NSDictionary *handlerObj;
     void (^completionHandler)(UIBackgroundFetchResult);
-    
+
     BOOL ready;
 }
 
@@ -66,5 +67,7 @@
 @property(nonatomic, strong) NSString *gcmSenderId;
 @property(nonatomic, strong) NSDictionary *gcmRegistrationOptions;
 @property(nonatomic, strong) void (^gcmRegistrationHandler) (NSString *registrationToken, NSError *error);
+@property(nonatomic, strong) NSString *gcmRegistrationToken;
+@property(nonatomic, strong) NSArray *gcmTopics;
 
 @end

src/ios/PushPlugin.m

@@ -29,7 +29,6 @@
 #import "PushPlugin.h"
 #import "CloudMessaging.h"
 
-
 @implementation PushPlugin
 
 @synthesize notificationMessage;
@@ -46,14 +45,40 @@ @implementation PushPlugin
 @synthesize gcmSenderId;
 @synthesize gcmRegistrationOptions;
 @synthesize gcmRegistrationHandler;
-
+@synthesize gcmRegistrationToken;
+@synthesize gcmTopics;
 
 -(void)initGCMRegistrationHandler;
 {
     __weak __block PushPlugin *weakSelf = self;
     gcmRegistrationHandler = ^(NSString *registrationToken, NSError *error){
         if (registrationToken != nil) {
             NSLog(@"GCM Registration Token: %@", registrationToken);
+            [weakSelf setGcmRegistrationToken: registrationToken];
+
+            id topics = [weakSelf gcmTopics];
+            if (topics != nil) {
+                for (NSString *topic in topics) {
+                    NSLog(@"subscribe from topic: %@", topic);
+                    id pubSub = [GCMPubSub sharedInstance];
+                    [pubSub subscribeWithToken: [weakSelf gcmRegistrationToken]
+                        topic:[NSString stringWithFormat:@"/topics/%@", topic]
+                        options:nil
+                        handler:^void(NSError *error) {
+                            if (error) {
+                                if (error.code == 3001) {
+                                    NSLog(@"Already subscribed to %@", topic);
+                                } else {
+                                    NSLog(@"Failed to subscribe to topic %@: %@", topic, error);
+                                }
+                            }
+                            else {
+                                NSLog(@"Successfully subscribe to topic %@", topic);
+                            }
+                    }];
+                }
+            }
+
             [weakSelf registerWithToken:registrationToken];
         } else {
             NSLog(@"Registration to GCM failed with error: %@", error.localizedDescription);
@@ -75,12 +100,52 @@ - (void)onTokenRefresh {
 #endif
 }
 
+// [START upstream_callbacks]
+- (void)willSendDataMessageWithID:(NSString *)messageID error:(NSError *)error {
+    if (error) {
+        // Failed to send the message.
+    } else {
+        // Will send message, you can save the messageID to track the message
+    }
+}
+
+- (void)didSendDataMessageWithID:(NSString *)messageID {
+    // Did successfully send message identified by messageID
+}
+// [END upstream_callbacks]
+
+- (void)didDeleteMessagesOnServer {
+    // Some messages sent to this device were deleted on the GCM server before reception, likely
+    // because the TTL expired. The client should notify the app server of this, so that the app
+    // server can resend those messages.
+}
+
 - (void)unregister:(CDVInvokedUrlCommand*)command;
 {
     self.callbackId = command.callbackId;
 
-    [[UIApplication sharedApplication] unregisterForRemoteNotifications];
-    [self successWithMessage:@"unregistered"];
+    NSArray* topics = [command argumentAtIndex:0];
+
+    if (topics != nil) {
+        id pubSub = [GCMPubSub sharedInstance];
+        for (NSString *topic in topics) {
+            NSLog(@"unsubscribe from topic: %@", topic);
+            [pubSub unsubscribeWithToken: [self gcmRegistrationToken]
+                topic:topic
+                options:nil
+                handler:^void(NSError *error) {
+                    if (error) {
+                        NSLog(@"Failed to unsubscribe from topic %@: %@", topic, error);
+                    }
+                    else {
+                        NSLog(@"Successfully unsubscribe from topic %@", topic);
+                    }
+            }];
+        }
+    } else {
+        [[UIApplication sharedApplication] unregisterForRemoteNotifications];
+        [self successWithMessage:@"unregistered"];
+    }
 }
 
 - (void)init:(CDVInvokedUrlCommand*)command;
@@ -93,6 +158,9 @@ - (void)init:(CDVInvokedUrlCommand*)command;
     NSMutableDictionary* options = [command.arguments objectAtIndex:0];
     NSMutableDictionary* iosOptions = [options objectForKey:@"ios"];
 
+    NSArray* topics = [iosOptions objectForKey:@"topics"];
+    [self setGcmTopics:topics];
+
 #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
     UIUserNotificationType UserNotificationTypes = UIUserNotificationTypeNone;
 #endif
@@ -341,6 +409,10 @@ - (void)didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
                                                           options:[self gcmRegistrationOptions]
                                                           handler:[self gcmRegistrationHandler]];
 
+        GCMConfig *gcmConfig = [GCMConfig defaultConfig];
+        gcmConfig.receiverDelegate = self;
+        [[GCMService sharedInstance] startWithConfig:gcmConfig];
+
     } else {
         [self registerWithToken: token];
     }
@@ -523,4 +595,18 @@ -(void)stopBackgroundTask:(NSTimer*)timer
     }
 }
 
+// [START ack_message_reception]
+- (void)application:(UIApplication *)application
+didReceiveRemoteNotification:(NSDictionary *)userInfo {
+    NSLog(@"Notification received: %@", userInfo);
+    // This works only if the app started the GCM service
+    [[GCMService sharedInstance] appDidReceiveMessage:userInfo];
+    // Handle the received message
+    // [START_EXCLUDE]
+    //[[NSNotificationCenter defaultCenter] postNotificationName:_messageKey
+    //                                                    object:nil
+    //                                                  userInfo:userInfo];
+    // [END_EXCLUDE]
+}
+
 @end