text: /*
   Copyright (c) 2011, Tony Million.
   All rights reserved.
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:
   1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGE.
   */
  
  #import <Foundation/Foundation.h>
  #import <SystemConfiguration/SystemConfiguration.h>
  
  /**
   * Does ARC support GCD objects?
   * It does if the minimum deployment target is iOS 6+ or Mac OS X 8+
   *
   * @see http://opensource.apple.com/source/libdispatch/libdispatch-228.18/os/object.h
   **/
  #if OS_OBJECT_USE_OBJC
  #define NEEDS_DISPATCH_RETAIN_RELEASE 0
  #else
  #define NEEDS_DISPATCH_RETAIN_RELEASE 1
  #endif
  
  /**
   * Create NS_ENUM macro if it does not exist on the targeted version of iOS or OS X.
   *
   * @see http://nshipster.com/ns_enum-ns_options/
   **/
  #ifndef NS_ENUM
  #define NS_ENUM(_type, _name) \
      enum _name : _type _name; \
      enum _name : _type
  #endif
  
  NS_ASSUME_NONNULL_BEGIN
  
  extern NSString *const kPHGReachabilityChangedNotification;
  
  typedef NS_ENUM(NSInteger, PHGNetworkStatus) {
      // Apple NetworkStatus Compatible Names.
      PHGNotReachable = 0,
      PHGReachableViaWiFi = 2,
      PHGReachableViaWWAN = 1
  };
  
  @class PHGReachability;
  
  typedef void (^PHGNetworkReachable)(PHGReachability *reachability);
  typedef void (^PHGNetworkUnreachable)(PHGReachability *reachability);
  
  
  @interface PHGReachability : NSObject
  
  @property (nonatomic, copy, nullable) PHGNetworkReachable reachableBlock;
  @property (nonatomic, copy, nullable) PHGNetworkUnreachable unreachableBlock;
  
  
  @property (nonatomic, assign) BOOL reachableOnWWAN;
  
  + (PHGReachability *_Nullable)reachabilityWithHostname:(NSString *)hostname;
  + (PHGReachability *_Nullable)reachabilityForInternetConnection;
  + (PHGReachability *_Nullable)reachabilityForLocalWiFi;
  
  - (PHGReachability *)initWithReachabilityRef:(SCNetworkReachabilityRef)ref;
  
  - (BOOL)startNotifier;
  - (void)stopNotifier;
  
  - (BOOL)isReachable;
  - (BOOL)isReachableViaWWAN;
  - (BOOL)isReachableViaWiFi;
  
  // WWAN may be available, but not active until a connection has been established.
  // WiFi may require a connection for VPN on Demand.
  - (BOOL)isConnectionRequired; // Identical DDG variant.
  - (BOOL)connectionRequired;   // Apple's routine.
  // Dynamic, on demand connection?
  - (BOOL)isConnectionOnDemand;
  // Is user intervention required?
  - (BOOL)isInterventionRequired;
  
  - (PHGNetworkStatus)currentReachabilityStatus;
  - (SCNetworkReachabilityFlags)reachabilityFlags;
  - (NSString *)currentReachabilityString;
  - (NSString *)currentReachabilityFlags;
  
  @end
  
  NS_ASSUME_NONNULL_END
  