Add get tags

Author: shepherd-l

android/src/main/java/com/onesignal/flutter/OneSignalUser.java

@@ -48,6 +48,8 @@ else if (call.method.contentEquals("OneSignal#addTags"))
             this.addTags(call, result);
         else if (call.method.contentEquals("OneSignal#removeTags"))
             this.removeTags(call, result);
+        else if (call.method.contentEquals("OneSignal#getTags"))
+            this.getTags(call, result);
         else
             replyNotImplemented(result);
     }
@@ -124,4 +126,8 @@ private void removeTags(MethodCall call, Result result) {
             replyError(result, "OneSignal", "deleteTags failed with error: " + e.getMessage() + "\n" + e.getStackTrace(), null);
         }
     }
+
+    private void getTags(MethodCall call, Result result) {
+        replySuccess(result, OneSignal.getUser().getTags());
+    }
 }

ios/Classes/OSFlutterUser.m

@@ -55,6 +55,8 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
         [self addTags:call withResult:result];
     else if ([@"OneSignal#removeTags" isEqualToString:call.method])
         [self removeTags:call withResult:result];
+    else if ([@"OneSignal#getTags" isEqualToString:call.method])
+        [self getTags:call withResult:result];
     else if ([@"OneSignal#addEmail" isEqualToString:call.method])
         [self addEmail:call withResult:result];
     else if ([@"OneSignal#removeEmail" isEqualToString:call.method])
@@ -102,6 +104,10 @@ - (void)removeTags:(FlutterMethodCall *)call withResult:(FlutterResult)result {
     result(nil);
 }
 
+- (void)getTags:(FlutterMethodCall *)call withResult:(FlutterResult)result {
+    result([OneSignal.User getTags]);
+}
+
 - (void)addEmail:(FlutterMethodCall *)call withResult:(FlutterResult)result {
     NSString *email = call.arguments;
     [OneSignal.User addEmail:email];

lib/src/user.dart

@@ -77,6 +77,12 @@ class OneSignalUser {
     return await _channel.invokeMethod("OneSignal#removeTags", tags);
   }
 
+  /// Returns the list of tags on the current user.
+  Future<Map<String, String>> getTags() async {
+    Map<dynamic, dynamic> tags = await _channel.invokeMethod("OneSignal#getTags");
+    return tags.cast<String, String>();
+  }
+
   /// Add a new [email] subscription to the current user.
   Future<void> addEmail(String email) async {
     return await _channel.invokeMethod("OneSignal#addEmail", email);