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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>
#import "Firestore/Source/Core/FSTTypes.h"
#import "Firestore/Source/Core/FSTViewSnapshot.h"
#import "Firestore/Source/Remote/FSTRemoteStore.h"
@class FSTQuery;
@class FSTSyncEngine;
NS_ASSUME_NONNULL_BEGIN
#pragma mark - FSTListenOptions
@interface FSTListenOptions : NSObject
+ (instancetype)defaultOptions;
- (instancetype)initWithIncludeQueryMetadataChanges:(BOOL)includeQueryMetadataChanges
includeDocumentMetadataChanges:(BOOL)includeDocumentMetadataChanges
waitForSyncWhenOnline:(BOOL)waitForSyncWhenOnline
NS_DESIGNATED_INITIALIZER;
- (instancetype)init NS_UNAVAILABLE;
@property(nonatomic, assign, readonly) BOOL includeQueryMetadataChanges;
@property(nonatomic, assign, readonly) BOOL includeDocumentMetadataChanges;
@property(nonatomic, assign, readonly) BOOL waitForSyncWhenOnline;
@end
#pragma mark - FSTQueryListener
/**
* FSTQueryListener takes a series of internal view snapshots and determines when to raise
* user-facing events.
*/
@interface FSTQueryListener : NSObject
- (instancetype)initWithQuery:(FSTQuery *)query
options:(FSTListenOptions *)options
viewSnapshotHandler:(FSTViewSnapshotHandler)viewSnapshotHandler NS_DESIGNATED_INITIALIZER;
- (instancetype)init NS_UNAVAILABLE;
- (void)queryDidChangeViewSnapshot:(FSTViewSnapshot *)snapshot;
- (void)queryDidError:(NSError *)error;
- (void)applyChangedOnlineState:(FSTOnlineState)onlineState;
@property(nonatomic, strong, readonly) FSTQuery *query;
@end
#pragma mark - FSTEventManager
/**
* EventManager is responsible for mapping queries to query event emitters. It handles "fan-out."
* (Identical queries will re-use the same watch on the backend.)
*/
@interface FSTEventManager : NSObject <FSTOnlineStateDelegate>
+ (instancetype)eventManagerWithSyncEngine:(FSTSyncEngine *)syncEngine;
- (instancetype)init __attribute__((unavailable("Use static constructor method.")));
- (FSTTargetID)addListener:(FSTQueryListener *)listener;
- (void)removeListener:(FSTQueryListener *)listener;
@end
NS_ASSUME_NONNULL_END
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