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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 <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@class FIRDocumentChange;
@class FIRDocumentSnapshot;
@class FIRQuery;
@class FIRSnapshotMetadata;
/**
* A `FIRQuerySnapshot` contains zero or more `FIRDocumentSnapshot` objects. It can be enumerated
* using "for ... in documentSet.documents" and its size can be inspected with `isEmpty` and
* `count`.
*/
NS_SWIFT_NAME(QuerySnapshot)
@interface FIRQuerySnapshot : NSObject
/** */
- (id)init __attribute__((unavailable("FIRQuerySnapshot cannot be created directly.")));
/**
* The query on which you called `getDocuments` or listened to in order to get this
* `FIRQuerySnapshot`.
*/
@property(nonatomic, strong, readonly) FIRQuery *query;
/** Metadata about this snapshot, concerning its source and if it has local modifications. */
@property(nonatomic, strong, readonly) FIRSnapshotMetadata *metadata;
/** Indicates whether this `FIRQuerySnapshot` is empty (contains no documents). */
@property(nonatomic, readonly, getter=isEmpty) BOOL empty;
/** The count of documents in this `FIRQuerySnapshot`. */
@property(nonatomic, readonly) NSInteger count;
/** An Array of the `FIRDocumentSnapshots` that make up this document set. */
@property(nonatomic, strong, readonly) NSArray<FIRDocumentSnapshot *> *documents;
/**
* An array of the documents that changed since the last snapshot. If this is the first snapshot,
* all documents will be in the list as Added changes.
*/
@property(nonatomic, strong, readonly) NSArray<FIRDocumentChange *> *documentChanges;
@end
NS_ASSUME_NONNULL_END
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