Updates 2017-11-21 0950

1 files changed, 18 insertions, 1 deletions

diff --git a/src/BLEDescriptor.h b/src/BLEDescriptor.h
index 1d32d50..4eda4c9 100644
--- a/src/BLEDescriptor.h
+++ b/src/BLEDescriptor.h
@@ -17,6 +17,7 @@
 
 class BLEService;
 class BLECharacteristic;
+class BLEDescriptorCallbacks;
 
 /**
  * @brief A model of a %BLE descriptor.
@@ -27,6 +28,7 @@ public:
 	BLEDescriptor(BLEUUID uuid);
 	virtual ~BLEDescriptor();
 
+	uint16_t getHandle();
 	size_t   getLength();
 	BLEUUID  getUUID();
 	uint8_t* getValue();
@@ -34,6 +36,7 @@ public:
 			esp_gatts_cb_event_t      event,
 			esp_gatt_if_t             gatts_if,
 			esp_ble_gatts_cb_param_t* param);
+	void setCallbacks(BLEDescriptorCallbacks* pCallbacks);
 	void setValue(uint8_t* data, size_t size);
 	void setValue(std::string value);
 	std::string toString();
@@ -45,10 +48,24 @@ private:
 	esp_attr_value_t     m_value;
 	uint16_t             m_handle;
 	BLECharacteristic*   m_pCharacteristic;
+	BLEDescriptorCallbacks* m_pCallback;
 	void executeCreate(BLECharacteristic* pCharacteristic);
-	uint16_t getHandle();
 	void setHandle(uint16_t handle);
 	FreeRTOS::Semaphore m_semaphoreCreateEvt = FreeRTOS::Semaphore("CreateEvt");
 };
+
+/**
+ * @brief Callbacks that can be associated with a %BLE descriptors to inform of events.
+ *
+ * When a server application creates a %BLE descriptor, we may wish to be informed when there is either
+ * a read or write request to the descriptors value.  An application can register a
+ * sub-classed instance of this class and will be notified when such an event happens.
+ */
+class BLEDescriptorCallbacks {
+public:
+	virtual ~BLEDescriptorCallbacks();
+	virtual void onRead(BLEDescriptor* pDescriptor);
+	virtual void onWrite(BLEDescriptor* pDescriptor);
+};
 #endif /* CONFIG_BT_ENABLED */
 #endif /* COMPONENTS_CPP_UTILS_BLEDESCRIPTOR_H_ */