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/*
* 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 "FIRDocumentSnapshot.h"
#import "Firestore/Source/API/FIRSnapshotOptions+Internal.h"
#import "Firestore/Source/Util/FSTAssert.h"
NS_ASSUME_NONNULL_BEGIN
@interface FIRSnapshotOptions ()
@property(nonatomic) FSTServerTimestampBehavior serverTimestampBehavior;
@end
@implementation FIRSnapshotOptions
- (instancetype)initWithServerTimestampBehavior:
(FSTServerTimestampBehavior)serverTimestampBehavior {
self = [super init];
if (self) {
_serverTimestampBehavior = serverTimestampBehavior;
}
return self;
}
+ (instancetype)defaultOptions {
static FIRSnapshotOptions *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance =
[[FIRSnapshotOptions alloc] initWithServerTimestampBehavior:FSTServerTimestampBehaviorNone];
});
return sharedInstance;
}
+ (instancetype)serverTimestampBehavior:(FIRServerTimestampBehavior)serverTimestampBehavior {
switch (serverTimestampBehavior) {
case FIRServerTimestampBehaviorEstimate:
return [[FIRSnapshotOptions alloc]
initWithServerTimestampBehavior:FSTServerTimestampBehaviorEstimate];
case FIRServerTimestampBehaviorPrevious:
return [[FIRSnapshotOptions alloc]
initWithServerTimestampBehavior:FSTServerTimestampBehaviorPrevious];
case FIRServerTimestampBehaviorNone:
return [FIRSnapshotOptions defaultOptions];
default:
FSTFail(@"Encountered unknown server timestamp behavior: %d", (int)serverTimestampBehavior);
}
}
@end
NS_ASSUME_NONNULL_END
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