1 files changed, 82 insertions, 0 deletions
diff --git a/src/components/ble/HeartRateService.cpp b/src/components/ble/HeartRateService.cpp
new file mode 100644
index 0000000..4824a6b
--- /dev/null
+++ b/src/components/ble/HeartRateService.cpp
@@ -0,0 +1,82 @@
+#include "components/ble/HeartRateService.h"
+#include "components/heartrate/HeartRateController.h"
+#include "systemtask/SystemTask.h"
+#include <nrf_log.h>
+
+using namespace Pinetime::Controllers;
+
+constexpr ble_uuid16_t HeartRateService::heartRateServiceUuid;
+constexpr ble_uuid16_t HeartRateService::heartRateMeasurementUuid;
+
+namespace {
+  int HeartRateServiceCallback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt* ctxt, void* arg) {
+    auto* heartRateService = static_cast<HeartRateService*>(arg);
+    return heartRateService->OnHeartRateRequested(conn_handle, attr_handle, ctxt);
+  }
+}
+
+// TODO Refactoring - remove dependency to SystemTask
+HeartRateService::HeartRateService(Pinetime::System::SystemTask& system, Controllers::HeartRateController& heartRateController)
+  : system {system},
+    heartRateController {heartRateController},
+    characteristicDefinition {{.uuid = &heartRateMeasurementUuid.u,
+                               .access_cb = HeartRateServiceCallback,
+                               .arg = this,
+                               .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                               .val_handle = &heartRateMeasurementHandle},
+                              {0}},
+    serviceDefinition {
+      {/* Device Information Service */
+       .type = BLE_GATT_SVC_TYPE_PRIMARY,
+       .uuid = &heartRateServiceUuid.u,
+       .characteristics = characteristicDefinition},
+      {0},
+    } {
+  // TODO refactor to prevent this loop dependency (service depends on controller and controller depends on service)
+  heartRateController.SetService(this);
+}
+
+void HeartRateService::Init() {
+  int res = 0;
+  res = ble_gatts_count_cfg(serviceDefinition);
+  ASSERT(res == 0);
+
+  res = ble_gatts_add_svcs(serviceDefinition);
+  ASSERT(res == 0);
+}
+
+int HeartRateService::OnHeartRateRequested(uint16_t connectionHandle, uint16_t attributeHandle, ble_gatt_access_ctxt* context) {
+  if (attributeHandle == heartRateMeasurementHandle) {
+    NRF_LOG_INFO("HEARTRATE : handle = %d", heartRateMeasurementHandle);
+    uint8_t buffer[2] = {0, heartRateController.HeartRate()}; // [0] = flags, [1] = hr value
+
+    int res = os_mbuf_append(context->om, buffer, 2);
+    return (res == 0) ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
+  }
+  return 0;
+}
+
+void HeartRateService::OnNewHeartRateValue(uint8_t heartRateValue) {
+  if(!heartRateMeasurementNotificationEnable) return;
+
+  uint8_t buffer[2] = {0, heartRateController.HeartRate()}; // [0] = flags, [1] = hr value
+  auto* om = ble_hs_mbuf_from_flat(buffer, 2);
+
+  uint16_t connectionHandle = system.nimble().connHandle();
+
+  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
+    return;
+  }
+
+  ble_gattc_notify_custom(connectionHandle, heartRateMeasurementHandle, om);
+}
+
+void HeartRateService::SubscribeNotification(uint16_t connectionHandle, uint16_t attributeHandle) {
+  if(attributeHandle == heartRateMeasurementHandle)
+    heartRateMeasurementNotificationEnable = true;
+}
+
+void HeartRateService::UnsubscribeNotification(uint16_t connectionHandle, uint16_t attributeHandle) {
+  if(attributeHandle == heartRateMeasurementHandle)
+    heartRateMeasurementNotificationEnable = false;
+}
+\ No newline at end of file