/*
 * 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 "FIRSnapshotMetadata.h"

#import "Firestore/Source/API/FIRSnapshotMetadata+Internal.h"

NS_ASSUME_NONNULL_BEGIN

@interface FIRSnapshotMetadata ()

- (instancetype)initWithPendingWrites:(BOOL)pendingWrites fromCache:(BOOL)fromCache;

@end

@implementation FIRSnapshotMetadata (Internal)

+ (instancetype)snapshotMetadataWithPendingWrites:(BOOL)pendingWrites fromCache:(BOOL)fromCache {
  return [[FIRSnapshotMetadata alloc] initWithPendingWrites:pendingWrites fromCache:fromCache];
}

@end

@implementation FIRSnapshotMetadata

- (instancetype)initWithPendingWrites:(BOOL)pendingWrites fromCache:(BOOL)fromCache {
  if (self = [super init]) {
    _pendingWrites = pendingWrites;
    _fromCache = fromCache;
  }
  return self;
}

// NSObject Methods
- (BOOL)isEqual:(nullable id)other {
  if (other == self) return YES;
  if (![[other class] isEqual:[self class]]) return NO;

  return [self isEqualToMetadata:other];
}

- (BOOL)isEqualToMetadata:(nullable FIRSnapshotMetadata *)metadata {
  if (self == metadata) return YES;
  if (metadata == nil) return NO;

  return self.pendingWrites == metadata.pendingWrites && self.fromCache == metadata.fromCache;
}

- (NSUInteger)hash {
  NSUInteger hash = self.pendingWrites ? 1 : 0;
  hash = hash * 31u + (self.fromCache ? 1 : 0);
  return hash;
}

@end

NS_ASSUME_NONNULL_END