//
//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
//

#import "SRWebSocket.h"

static void *SocketManagerStateObservationContext = &SocketManagerStateObservationContext;

extern NSString *const kNSNotification_SocketManagerStateDidChange;

typedef NS_ENUM(NSUInteger, SocketManagerState) {
    SocketManagerStateClosed,
    SocketManagerStateConnecting,
    SocketManagerStateOpen,
};

@interface TSSocketManager : NSObject <SRWebSocketDelegate>

@property (nonatomic, readonly) SocketManagerState state;

+ (instancetype)sharedManager;

- (instancetype)init NS_UNAVAILABLE;

// If the app is in the foreground, we'll try to open the socket unless it's already
// open or connecting.
//
// If the app is in the background, we'll try to open the socket unless it's already
// open or connecting _and_ keep it open for at least N seconds.
// If the app is in the background and the socket is already open or connecting this
// might prolong how long we keep the socket open.
//
// This method can be called from any thread.
+ (void)requestSocketOpen;

@end