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// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#import <Foundation/Foundation.h>
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#import "FirebasePerformance/Sources/AppActivity/FPRSessionDetails.h"
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/* Notification name when the session Id gets updated. */
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FOUNDATION_EXTERN NSString *_Nonnull const kFPRSessionIdUpdatedNotification;
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/* Notification name when the session Id gets updated. */
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FOUNDATION_EXTERN NSString *_Nonnull const kFPRSessionIdNotificationKey;
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/** This class manages the current active sessionId of the application and provides mechanism for
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* propagating the session Id.
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*/
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NS_EXTENSION_UNAVAILABLE("Firebase Performance is not supported for extensions.")
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@interface FPRSessionManager : NSObject
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/** The current active session managed by the session manager. */
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@property(atomic, readonly, nonnull) FPRSessionDetails *sessionDetails;
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/**
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* The notification center managed by the session manager. All the notifications by the session
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* manager will get broadcasted on this notification center.
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*/
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@property(nonatomic, readonly, nonnull) NSNotificationCenter *sessionNotificationCenter;
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/**
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* The shared instance of Session Manager.
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*
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* @return The singleton instance.
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*/
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+ (nonnull FPRSessionManager *)sharedInstance;
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- (nullable instancetype)init NS_UNAVAILABLE;
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/**
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* Starts tracking the application state changes to begin session ID state changes.
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*/
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- (void)startTrackingAppStateChanges;
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@end
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