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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 "Firestore/Source/API/FIRFieldValue+Internal.h"
NS_ASSUME_NONNULL_BEGIN
@interface FIRFieldValue ()
- (instancetype)initPrivate NS_DESIGNATED_INITIALIZER;
@end
#pragma mark - FSTDeleteFieldValue
@interface FSTDeleteFieldValue ()
/** Returns a single shared instance of the class. */
+ (instancetype)deleteFieldValue;
@end
@implementation FSTDeleteFieldValue
- (instancetype)initPrivate {
self = [super initPrivate];
return self;
}
+ (instancetype)deleteFieldValue {
static FSTDeleteFieldValue *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[FSTDeleteFieldValue alloc] initPrivate];
});
return sharedInstance;
}
@end
#pragma mark - FSTServerTimestampFieldValue
@interface FSTServerTimestampFieldValue ()
/** Returns a single shared instance of the class. */
+ (instancetype)serverTimestampFieldValue;
@end
@implementation FSTServerTimestampFieldValue
- (instancetype)initPrivate {
self = [super initPrivate];
return self;
}
+ (instancetype)serverTimestampFieldValue {
static FSTServerTimestampFieldValue *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[FSTServerTimestampFieldValue alloc] initPrivate];
});
return sharedInstance;
}
@end
#pragma mark - FIRFieldValue
@implementation FIRFieldValue
- (instancetype)initPrivate {
self = [super init];
return self;
}
+ (instancetype)fieldValueForDelete {
return [FSTDeleteFieldValue deleteFieldValue];
}
+ (instancetype)fieldValueForServerTimestamp {
return [FSTServerTimestampFieldValue serverTimestampFieldValue];
}
@end
NS_ASSUME_NONNULL_END
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