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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/Model/FSTMutationBatch.h"
#include <utility>
#import "FIRTimestamp.h"
#import "Firestore/Source/Model/FSTDocument.h"
#import "Firestore/Source/Model/FSTMutation.h"
#include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
using firebase::firestore::model::DocumentKey;
using firebase::firestore::model::DocumentKeyHash;
using firebase::firestore::model::SnapshotVersion;
using firebase::firestore::model::DocumentKeySet;
using firebase::firestore::model::DocumentVersionMap;
NS_ASSUME_NONNULL_BEGIN
const FSTBatchID kFSTBatchIDUnknown = -1;
@implementation FSTMutationBatch
- (instancetype)initWithBatchID:(FSTBatchID)batchID
localWriteTime:(FIRTimestamp *)localWriteTime
mutations:(NSArray<FSTMutation *> *)mutations {
self = [super init];
if (self) {
_batchID = batchID;
_localWriteTime = localWriteTime;
_mutations = mutations;
}
return self;
}
- (BOOL)isEqual:(id)other {
if (self == other) {
return YES;
} else if (![other isKindOfClass:[FSTMutationBatch class]]) {
return NO;
}
FSTMutationBatch *otherBatch = (FSTMutationBatch *)other;
return self.batchID == otherBatch.batchID &&
[self.localWriteTime isEqual:otherBatch.localWriteTime] &&
[self.mutations isEqual:otherBatch.mutations];
}
- (NSUInteger)hash {
NSUInteger result = (NSUInteger)self.batchID;
result = result * 31 + self.localWriteTime.hash;
result = result * 31 + self.mutations.hash;
return result;
}
- (NSString *)description {
return [NSString stringWithFormat:@"<FSTMutationBatch: id=%d, localWriteTime=%@, mutations=%@>",
self.batchID, self.localWriteTime, self.mutations];
}
- (FSTMaybeDocument *_Nullable)applyTo:(FSTMaybeDocument *_Nullable)maybeDoc
documentKey:(const DocumentKey &)documentKey
mutationBatchResult:(FSTMutationBatchResult *_Nullable)mutationBatchResult {
HARD_ASSERT(!maybeDoc || [maybeDoc.key isEqualToKey:documentKey],
"applyTo: key %s doesn't match maybeDoc key %s", documentKey.ToString(),
maybeDoc.key.ToString());
FSTMaybeDocument *baseDoc = maybeDoc;
if (mutationBatchResult) {
HARD_ASSERT(mutationBatchResult.mutationResults.count == self.mutations.count,
"Mismatch between mutations length (%s) and results length (%s)",
self.mutations.count, mutationBatchResult.mutationResults.count);
}
for (NSUInteger i = 0; i < self.mutations.count; i++) {
FSTMutation *mutation = self.mutations[i];
FSTMutationResult *_Nullable mutationResult = mutationBatchResult.mutationResults[i];
if ([mutation.key isEqualToKey:documentKey]) {
maybeDoc = [mutation applyTo:maybeDoc
baseDocument:baseDoc
localWriteTime:self.localWriteTime
mutationResult:mutationResult];
}
}
return maybeDoc;
}
- (FSTMaybeDocument *_Nullable)applyTo:(FSTMaybeDocument *_Nullable)maybeDoc
documentKey:(const DocumentKey &)documentKey {
return [self applyTo:maybeDoc documentKey:documentKey mutationBatchResult:nil];
}
- (BOOL)isTombstone {
return self.mutations.count == 0;
}
- (FSTMutationBatch *)toTombstone {
return [[FSTMutationBatch alloc] initWithBatchID:self.batchID
localWriteTime:self.localWriteTime
mutations:@[]];
}
// TODO(klimt): This could use NSMutableDictionary instead.
- (DocumentKeySet)keys {
DocumentKeySet set;
for (FSTMutation *mutation in self.mutations) {
set = set.insert(mutation.key);
}
return set;
}
@end
#pragma mark - FSTMutationBatchResult
@interface FSTMutationBatchResult ()
- (instancetype)initWithBatch:(FSTMutationBatch *)batch
commitVersion:(SnapshotVersion)commitVersion
mutationResults:(NSArray<FSTMutationResult *> *)mutationResults
streamToken:(nullable NSData *)streamToken
docVersions:(DocumentVersionMap)docVersions NS_DESIGNATED_INITIALIZER;
@end
@implementation FSTMutationBatchResult {
SnapshotVersion _commitVersion;
DocumentVersionMap _docVersions;
}
- (instancetype)initWithBatch:(FSTMutationBatch *)batch
commitVersion:(SnapshotVersion)commitVersion
mutationResults:(NSArray<FSTMutationResult *> *)mutationResults
streamToken:(nullable NSData *)streamToken
docVersions:(DocumentVersionMap)docVersions {
if (self = [super init]) {
_batch = batch;
_commitVersion = std::move(commitVersion);
_mutationResults = mutationResults;
_streamToken = streamToken;
_docVersions = std::move(docVersions);
}
return self;
}
- (const SnapshotVersion &)commitVersion {
return _commitVersion;
}
- (const DocumentVersionMap &)docVersions {
return _docVersions;
}
+ (instancetype)resultWithBatch:(FSTMutationBatch *)batch
commitVersion:(SnapshotVersion)commitVersion
mutationResults:(NSArray<FSTMutationResult *> *)mutationResults
streamToken:(nullable NSData *)streamToken {
HARD_ASSERT(batch.mutations.count == mutationResults.count,
"Mutations sent %s must equal results received %s", batch.mutations.count,
mutationResults.count);
DocumentVersionMap docVersions;
NSArray<FSTMutation *> *mutations = batch.mutations;
for (NSUInteger i = 0; i < mutations.count; i++) {
absl::optional<SnapshotVersion> version = mutationResults[i].version;
if (!version) {
// deletes don't have a version, so we substitute the commitVersion
// of the entire batch.
version = commitVersion;
}
docVersions[mutations[i].key] = version.value();
}
return [[FSTMutationBatchResult alloc] initWithBatch:batch
commitVersion:std::move(commitVersion)
mutationResults:mutationResults
streamToken:streamToken
docVersions:std::move(docVersions)];
}
@end
NS_ASSUME_NONNULL_END
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