text: /*==================================================================================================
   File:       CHHapticPattern.h
   
   Contains:   API for creating haptic patterns
   
   Copyright:  (c) 2018 by Apple, Inc., all rights reserved.
   
   Bugs?:      For bug reports, consult the following page on
   the World Wide Web:
   
   http://developer.apple.com/bugreporter/
   
   ==================================================================================================*/
  
  #import <Foundation/NSArray.h>
  #import <Foundation/NSDate.h>
  #import <Foundation/NSDictionary.h>
  #import <Foundation/NSObject.h>
  #import <Foundation/NSObjCRuntime.h>
  
  #define CH_EXPORT __attribute__((visibility("default"))) extern
  
  NS_ASSUME_NONNULL_BEGIN
  
  @class CHHapticEvent;
  @class CHHapticDynamicParameter;
  @class CHHapticParameterCurve;
  
  /*! @enum CHHapticPatternKey
  	@abstract
  		Keys used to define a CHHapticPattern.
   
  	@discussion
  		A definition for a haptic pattern consists of a heirarchical set of key/value pairs, starting at the topmost level with
  		a "Version" and a "Pattern" key.  This marks the beginning of an array of event (CHHapticPatternKeyEvent) and parameter
   		(CHHapticPatternKeyParameter) definitions.  Each of these has an associated time which indicates when the event or parameter
   		will be delivered to the haptic engine.
   
  	@constant   CHHapticPatternKeyVersion
  		Indicates the version of the system for which the pattern was authored.
   		Value type: Real.
  
  	@constant   CHHapticPatternKeyPattern
  		Indicates the beginning of a haptic pattern definition.
   		Value type: Array.
   
  	@constant   CHHapticPatternKeyEvent
  		Indicates the beginning of a haptic event definition, which will include an event type, a time, and an optional set
  		of event parameters (CHHapticPatternKeyEventParameters).
   		Value type: Dictionary.
   
  	@constant   CHHapticPatternKeyEventType
  		The type of haptic or audio event.
   		Value type: NSString (CHHapticEventType).
   
   	@constant	CHHapticPatternKeyEventDuration
   		The duration in seconds for an event.
  		Value type: Real.
  
  	@constant   CHHapticPatternKeyEventParameters
  		Indicates the beginning of an array of event parameter (CHHapticPatternKeyParameter) definitions for a specific event.
   		Value type: Array.
   
  	@constant	CHHapticPatternKeyParameter
  		Indicates the beginning of a parameter definition, which will include a parameter type and value, and a time.
   		Value type: Dictionary.
   
  	@constant	CHHapticPatternKeyParameterID
  		The ID of the parameter.
  		Value type: NSString (CHHapticEventParameterID for event parameters and CHHapticDynamicParameterID for dynamic parameters).
  
  	@constant	CHHapticPatternKeyParameterValue
  		The value of the parameter.  The range will vary with the parameter.
  		Value type: Real.
  
  	@constant	CHHapticPatternKeyTime
  		The relative time for any event or parameter.  Units are seconds.
  		Value type: Real.
  
  	@constant   CHHapticPatternKeyEventWaveformPath
  		For events of type CHHapticEventTypeAudioCustom, the path to the local file containing the audio waveform.
  		Value type: NSString.
   */
  
  typedef NSString *CHHapticPatternKey NS_TYPED_ENUM;
  
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyVersion API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyPattern API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyEvent  API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyEventType API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyTime API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyEventDuration API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyEventWaveformPath API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyEventParameters API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyParameter API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyParameterID API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyParameterValue API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyParameterCurve API_AVAILABLE(ios(13.0), macos(10.15));
  CH_EXPORT
  CHHapticPatternKey CHHapticPatternKeyParameterCurveControlPoints API_AVAILABLE(ios(13.0), macos(10.15));
  
  /*!	@class CHHapticPattern
  	@abstract
  		A set of one or more haptic events and/or Dynamic parameters/parameter curves.
  	@discussion
  		The passed-in arrays' contents are not owned by the pattern object.  Changes made to those arrays
  		after a CHHapticPattern object is created have no effect on that object.
   */
  CH_EXPORT API_AVAILABLE(ios(13.0), macos(10.15))
  @interface CHHapticPattern : NSObject
  
  /*!	@property duration
  		Pattern duration is calculated as the start time of the pattern's last event or parameter, plus that event's duration if present.
   */
  @property (readonly,nonatomic) NSTimeInterval duration;
  
  - (nullable instancetype)init NS_UNAVAILABLE;
  
  /*! @method initWithEvents:parameters:error
  	@abstract
  		Initialize a new CHHapticPattern.
  	@param events
  		An NSArray of CHHapticEvents.  Can be empty.
  	@param parameters
  		An NSArray of CHHapticDynamicParameters.  Can be empty.
   */
  - (nullable instancetype) initWithEvents:(NSArray<CHHapticEvent *> *)events
  							  parameters:(NSArray<CHHapticDynamicParameter *> *)parameters
  								   error:(NSError **)outError;
  
  /*! @method initWithEvents:parameterCurves:error
   	@abstract
   		Initialize a new CHHapticPattern with parameters modulated by parameter curves.
   	@param events
   		An NSArray of CHHapticEvents.  Can be empty.
   	@param parameterCurves
   		An NSArray of CHHapticParameterCurves.  Can be empty.
   */
  - (nullable instancetype) initWithEvents:(NSArray<CHHapticEvent *> *)events
  						 parameterCurves:(NSArray<CHHapticParameterCurve *> *)parameterCurves
  								   error:(NSError **)outError;
  
  /*! @method initWithDictionary:error
  	@abstract
  		Initialize a new CHHapticPattern using the passed-in NSDictionary.
  	@param patternDict
  		NSDictionary containing a pattern property list.
   */
  - (nullable instancetype)initWithDictionary:(NSDictionary<CHHapticPatternKey, id> *)patternDict
  									  error:(NSError **)outError;
  
  /*! @method exportDictionaryAndReturnError:error
      @abstract
          Returns a NSDictionary representation of the contents of the pattern.
      @discussion
          Patterns containing custom audio resource IDs cannot be exported and will return nil
          with the error code set to CHHapticErrorCodeOperationNotPermitted.
   */
  - (nullable NSDictionary<CHHapticPatternKey, id> *) exportDictionaryAndReturnError:(NSError **)outError  __attribute__((swift_error(null_result)));
  
  @end
  
  NS_ASSUME_NONNULL_END
  
  