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Diffstat (limited to 'Firestore/Source/Util/FSTAsyncQueryListener.mm')
-rw-r--r-- | Firestore/Source/Util/FSTAsyncQueryListener.mm | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Firestore/Source/Util/FSTAsyncQueryListener.mm b/Firestore/Source/Util/FSTAsyncQueryListener.mm new file mode 100644 index 0000000..d98e2dd --- /dev/null +++ b/Firestore/Source/Util/FSTAsyncQueryListener.mm @@ -0,0 +1,50 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#import "Firestore/Source/Util/FSTAsyncQueryListener.h" + +#import "Firestore/Source/Util/FSTDispatchQueue.h" + +@implementation FSTAsyncQueryListener { + volatile BOOL _muted; + FSTViewSnapshotHandler _snapshotHandler; + FSTDispatchQueue *_dispatchQueue; +} + +- (instancetype)initWithDispatchQueue:(FSTDispatchQueue *)dispatchQueue + snapshotHandler:(FSTViewSnapshotHandler)snapshotHandler { + if (self = [super init]) { + _dispatchQueue = dispatchQueue; + _snapshotHandler = snapshotHandler; + } + return self; +} + +- (FSTViewSnapshotHandler)asyncSnapshotHandler { + return ^(FSTViewSnapshot *_Nullable snapshot, NSError *_Nullable error) { + [_dispatchQueue dispatchAsync:^{ + if (!_muted) { + _snapshotHandler(snapshot, error); + } + }]; + }; +} + +- (void)mute { + _muted = true; +} + +@end |