blob: 81dd41f859291d6d74c556ff1c857476047894b3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/*
* 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"
using firebase::firestore::util::internal::Executor;
@implementation FSTAsyncQueryListener {
volatile BOOL _muted;
FSTViewSnapshotHandler _snapshotHandler;
Executor *_executor;
}
- (instancetype)initWithExecutor:(Executor *)executor
snapshotHandler:(FSTViewSnapshotHandler)snapshotHandler {
if (self = [super init]) {
_executor = executor;
_snapshotHandler = snapshotHandler;
}
return self;
}
- (FSTViewSnapshotHandler)asyncSnapshotHandler {
// Retain `self` strongly in resulting snapshot handler so that even if the
// user releases the `FSTAsyncQueryListener` we'll continue to deliver
// events. This is done specifically to facilitate the common case where
// users just want to turn on notifications "forever" and don't want to have
// to keep track of our handle to keep them going.
return ^(FSTViewSnapshot *_Nullable snapshot, NSError *_Nullable error) {
self->_executor->Execute([self, snapshot, error] {
if (!self->_muted) {
self->_snapshotHandler(snapshot, error);
}
});
};
}
- (void)mute {
_muted = true;
}
@end
|
