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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/Local/FSTLocalViewChanges.h"
#import "Firestore/Source/Core/FSTViewSnapshot.h"
#import "Firestore/Source/Model/FSTDocument.h"
NS_ASSUME_NONNULL_BEGIN
@interface FSTLocalViewChanges ()
- (instancetype)initWithQuery:(FSTQuery *)query
addedKeys:(FSTDocumentKeySet *)addedKeys
removedKeys:(FSTDocumentKeySet *)removedKeys NS_DESIGNATED_INITIALIZER;
@end
@implementation FSTLocalViewChanges
+ (instancetype)changesForViewSnapshot:(FSTViewSnapshot *)viewSnapshot {
FSTDocumentKeySet *addedKeys = [FSTDocumentKeySet keySet];
FSTDocumentKeySet *removedKeys = [FSTDocumentKeySet keySet];
for (FSTDocumentViewChange *docChange in viewSnapshot.documentChanges) {
switch (docChange.type) {
case FSTDocumentViewChangeTypeAdded:
addedKeys = [addedKeys setByAddingObject:docChange.document.key];
break;
case FSTDocumentViewChangeTypeRemoved:
removedKeys = [removedKeys setByAddingObject:docChange.document.key];
break;
default:
// Do nothing.
break;
}
}
return [self changesForQuery:viewSnapshot.query addedKeys:addedKeys removedKeys:removedKeys];
}
+ (instancetype)changesForQuery:(FSTQuery *)query
addedKeys:(FSTDocumentKeySet *)addedKeys
removedKeys:(FSTDocumentKeySet *)removedKeys {
return
[[FSTLocalViewChanges alloc] initWithQuery:query addedKeys:addedKeys removedKeys:removedKeys];
}
- (instancetype)initWithQuery:(FSTQuery *)query
addedKeys:(FSTDocumentKeySet *)addedKeys
removedKeys:(FSTDocumentKeySet *)removedKeys {
self = [super init];
if (self) {
_query = query;
_addedKeys = addedKeys;
_removedKeys = removedKeys;
}
return self;
}
@end
NS_ASSUME_NONNULL_END
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