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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/FIRQuerySnapshot+Internal.h"
#import "FIRFirestore.h"
#import "FIRSnapshotMetadata.h"
#import "Firestore/Source/API/FIRDocumentChange+Internal.h"
#import "Firestore/Source/API/FIRDocumentSnapshot+Internal.h"
#import "Firestore/Source/API/FIRQuery+Internal.h"
#import "Firestore/Source/Core/FSTQuery.h"
#import "Firestore/Source/Core/FSTViewSnapshot.h"
#import "Firestore/Source/Model/FSTDocument.h"
#import "Firestore/Source/Model/FSTDocumentSet.h"
#include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
NS_ASSUME_NONNULL_BEGIN
@interface FIRQuerySnapshot ()
- (instancetype)initWithFirestore:(FIRFirestore *)firestore
originalQuery:(FSTQuery *)query
snapshot:(FSTViewSnapshot *)snapshot
metadata:(FIRSnapshotMetadata *)metadata;
@property(nonatomic, strong, readonly) FIRFirestore *firestore;
@property(nonatomic, strong, readonly) FSTQuery *originalQuery;
@property(nonatomic, strong, readonly) FSTViewSnapshot *snapshot;
@end
@implementation FIRQuerySnapshot (Internal)
+ (instancetype)snapshotWithFirestore:(FIRFirestore *)firestore
originalQuery:(FSTQuery *)query
snapshot:(FSTViewSnapshot *)snapshot
metadata:(FIRSnapshotMetadata *)metadata {
return [[FIRQuerySnapshot alloc] initWithFirestore:firestore
originalQuery:query
snapshot:snapshot
metadata:metadata];
}
@end
@implementation FIRQuerySnapshot {
// Cached value of the documents property.
NSArray<FIRQueryDocumentSnapshot *> *_documents;
// Cached value of the documentChanges property.
NSArray<FIRDocumentChange *> *_documentChanges;
BOOL _documentChangesIncludeMetadataChanges;
}
- (instancetype)initWithFirestore:(FIRFirestore *)firestore
originalQuery:(FSTQuery *)query
snapshot:(FSTViewSnapshot *)snapshot
metadata:(FIRSnapshotMetadata *)metadata {
if (self = [super init]) {
_firestore = firestore;
_originalQuery = query;
_snapshot = snapshot;
_metadata = metadata;
_documentChangesIncludeMetadataChanges = NO;
}
return self;
}
// NSObject Methods
- (BOOL)isEqual:(nullable id)other {
if (other == self) return YES;
if (![[other class] isEqual:[self class]]) return NO;
return [self isEqualToSnapshot:other];
}
- (BOOL)isEqualToSnapshot:(nullable FIRQuerySnapshot *)snapshot {
if (self == snapshot) return YES;
if (snapshot == nil) return NO;
return [self.firestore isEqual:snapshot.firestore] &&
[self.originalQuery isEqual:snapshot.originalQuery] &&
[self.snapshot isEqual:snapshot.snapshot] && [self.metadata isEqual:snapshot.metadata];
}
- (NSUInteger)hash {
NSUInteger hash = [self.firestore hash];
hash = hash * 31u + [self.originalQuery hash];
hash = hash * 31u + [self.snapshot hash];
hash = hash * 31u + [self.metadata hash];
return hash;
}
@dynamic empty;
- (FIRQuery *)query {
return [FIRQuery referenceWithQuery:self.originalQuery firestore:self.firestore];
}
- (BOOL)isEmpty {
return self.snapshot.documents.isEmpty;
}
// This property is exposed as an NSInteger instead of an NSUInteger since (as of Xcode 8.1)
// Swift bridges NSUInteger as UInt, and we want to avoid forcing Swift users to cast their ints
// where we can. See cr/146959032 for additional context.
- (NSInteger)count {
return self.snapshot.documents.count;
}
- (NSArray<FIRQueryDocumentSnapshot *> *)documents {
if (!_documents) {
FSTDocumentSet *documentSet = self.snapshot.documents;
FIRFirestore *firestore = self.firestore;
BOOL fromCache = self.metadata.fromCache;
NSMutableArray<FIRQueryDocumentSnapshot *> *result = [NSMutableArray array];
for (FSTDocument *document in documentSet.documentEnumerator) {
[result addObject:[FIRQueryDocumentSnapshot snapshotWithFirestore:firestore
documentKey:document.key
document:document
fromCache:fromCache]];
}
_documents = result;
}
return _documents;
}
- (NSArray<FIRDocumentChange *> *)documentChanges {
return [self documentChangesWithIncludeMetadataChanges:NO];
}
- (NSArray<FIRDocumentChange *> *)documentChangesWithIncludeMetadataChanges:
(BOOL)includeMetadataChanges {
if (!_documentChanges || _documentChangesIncludeMetadataChanges != includeMetadataChanges) {
_documentChanges = [FIRDocumentChange documentChangesForSnapshot:self.snapshot
includeMetadataChanges:includeMetadataChanges
firestore:self.firestore];
_documentChangesIncludeMetadataChanges = includeMetadataChanges;
}
return _documentChanges;
}
@end
NS_ASSUME_NONNULL_END
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