MXSession: add setAccountData

element-hq/element-ios#1860

and create a const for "m.widgets" account data

MatrixSDK/MXRestClient.h

@@ -62,6 +62,7 @@ FOUNDATION_EXPORT NSString *const kMXContentPrefixPath;
 FOUNDATION_EXPORT NSString *const kMXAccountDataTypeDirect;
 FOUNDATION_EXPORT NSString *const kMXAccountDataTypePushRules;
 FOUNDATION_EXPORT NSString *const kMXAccountDataTypeIgnoredUserList;
+FOUNDATION_EXPORT NSString *const kMXAccountDataTypeUserWidgets;
 
 /**
  Account data keys

MatrixSDK/MXRestClient.m

@@ -47,6 +47,7 @@
 NSString *const kMXAccountDataTypeIgnoredUserList = @"m.ignored_user_list";
 NSString *const kMXAccountDataTypePushRules = @"m.push_rules";
 NSString *const kMXAccountDataTypeDirect = @"m.direct";
+NSString *const kMXAccountDataTypeUserWidgets = @"m.widgets";
 
 /**
  Account data keys

MatrixSDK/MXSession.h

@@ -1069,6 +1069,24 @@ typedef void (^MXOnBackgroundSyncFail)(NSError *error);
 - (NSString*)tagOrderToBeAtIndex:(NSUInteger)index from:(NSUInteger)originIndex withTag:(NSString *)tag;
 
 
+#pragma mark - User's account data
+/**
+ Set some account data for the user.
+
+ @param data the new data to set for this event type.
+ @param type The event type of the account_data to set (@see kMXAccountDataType* strings)
+             Custom types should be namespaced to avoid clashes.
+ @param success A block object called when the operation succeeds.
+ @param failure A block object called when the operation fails.
+
+ @return a MXHTTPOperation instance.
+ */
+- (MXHTTPOperation*)setAccountData:(NSDictionary*)data
+                           forType:(NSString*)type
+                           success:(void (^)(void))success
+                           failure:(void (^)(NSError *error))failure;
+
+
 #pragma mark - Crypto
 /**
  Decrypt an event and update its data.

MatrixSDK/MXSession.m

@@ -1807,7 +1807,7 @@ - (MXHTTPOperation*)uploadDirectRooms:(void (^)(void))success
     __weak typeof(self) weakSelf = self;
 
     // Push the current direct rooms dictionary to the homeserver.
-    return [matrixRestClient setAccountData:_directRooms forType:kMXAccountDataTypeDirect success:^{
+    return [self setAccountData:_directRooms forType:kMXAccountDataTypeDirect success:^{
 
         // Notify a change in direct rooms directory
         [[NSNotificationCenter defaultCenter] postNotificationName:kMXSessionDirectRoomsDidChangeNotification
@@ -2598,7 +2598,7 @@ - (MXHTTPOperation*)ignoreUsers:(NSArray<NSString*>*)userIds
                            kMXAccountDataKeyIgnoredUser: ignoredUsersDict
                            };
 //    __weak __typeof(self)weakSelf = self;
-    return [matrixRestClient setAccountData:data forType:kMXAccountDataTypeIgnoredUserList success:^{
+    return [self setAccountData:data forType:kMXAccountDataTypeIgnoredUserList success:^{
 
 //        __strong __typeof(weakSelf)strongSelf = weakSelf;
 
@@ -2641,7 +2641,7 @@ - (MXHTTPOperation *)unIgnoreUsers:(NSArray<NSString *> *)userIds success:(void
                            kMXAccountDataKeyIgnoredUser: ignoredUsersDict
                            };
 //    __weak __typeof(self)weakSelf = self;
-    return [matrixRestClient setAccountData:data forType:kMXAccountDataTypeIgnoredUserList success:^{
+    return [self setAccountData:data forType:kMXAccountDataTypeIgnoredUserList success:^{
 
 //        __strong __typeof(weakSelf)strongSelf = weakSelf;
 
@@ -2953,6 +2953,15 @@ - (NSString*)tagOrderToBeAtIndex:(NSUInteger)index from:(NSUInteger)originIndex
 }
 
 
+#pragma mark - User's account data
+- (MXHTTPOperation*)setAccountData:(NSDictionary*)data
+                           forType:(NSString*)type
+                           success:(void (^)(void))success
+                           failure:(void (^)(NSError *error))failure
+{
+    return [matrixRestClient setAccountData:data forType:type success:success failure:failure];
+}
+
 #pragma mark - Crypto
 
 /**