munin-miflora: refactor into two implementations using go-ble and gatt libraries, have common package

common/gatt/impl.go

@@ -0,0 +1,86 @@
+package gatt
+
+import (
+	"errors"
+
+	"miflorad/common"
+
+	"github.com/currantlabs/gatt"
+)
+
+var MifloraCharVersionBatteryUUID = gatt.MustParseUUID("00001a02-0000-1000-8000-00805f9b34fb")
+
+func FindServiceByUUID(services []*gatt.Service, u gatt.UUID) *gatt.Service {
+	for _, service := range services {
+		if service.UUID().Equal(u) {
+			return service
+		}
+	}
+	return nil
+}
+
+func FindCharacteristicByUUID(characteristics []*gatt.Characteristic, u gatt.UUID) *gatt.Characteristic {
+	for _, characteristic := range characteristics {
+		if characteristic.UUID().Equal(u) {
+			return characteristic
+		}
+	}
+	return nil
+}
+
+func MifloraRequestVersionBattery(p gatt.Peripheral) (common.VersionBatteryResponse, error) {
+	mifloraService := FindServiceByUUID(p.Services(), gatt.MustParseUUID(common.MifloraServiceUUID))
+	if mifloraService == nil {
+		return common.VersionBatteryResponse{}, errors.New("Failed to get the miflora service")
+	}
+
+	mifloraVersionBatteryChar := FindCharacteristicByUUID(mifloraService.Characteristics(), MifloraCharVersionBatteryUUID)
+	if mifloraVersionBatteryChar == nil {
+		return common.VersionBatteryResponse{}, errors.New("Failed to get the version battery characteristic")
+	}
+
+	bytes, err := p.ReadCharacteristic(mifloraVersionBatteryChar)
+	if err != nil {
+		return common.VersionBatteryResponse{}, err
+	}
+
+	return common.ParseVersionBattery(bytes), nil
+}
+
+func MifloraRequestModeChange(p gatt.Peripheral) error {
+	mifloraService := FindServiceByUUID(p.Services(), gatt.MustParseUUID(common.MifloraServiceUUID))
+	if mifloraService == nil {
+		return errors.New("Failed to get the miflora service")
+	}
+
+	mifloraModeChangeChar := FindCharacteristicByUUID(mifloraService.Characteristics(), gatt.MustParseUUID(common.MifloraCharModeChangeUUID))
+	if mifloraModeChangeChar == nil {
+		return errors.New("Failed to discover the mode change characteristic")
+	}
+
+	err := p.WriteCharacteristic(mifloraModeChangeChar, common.MifloraGetModeChangeData(), false)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func MifloraRequstSensorData(p gatt.Peripheral) (common.SensorDataResponse, error) {
+	mifloraService := FindServiceByUUID(p.Services(), gatt.MustParseUUID(common.MifloraServiceUUID))
+	if mifloraService == nil {
+		return common.SensorDataResponse{}, errors.New("Failed to get the miflora service")
+	}
+
+	mifloraSensorDataChar := FindCharacteristicByUUID(mifloraService.Characteristics(), gatt.MustParseUUID(common.MifloraCharReadSensorDataUUID))
+	if mifloraSensorDataChar == nil {
+		return common.SensorDataResponse{}, errors.New("Failed to discover the sensor data characteristic")
+	}
+
+	bytes, err := p.ReadCharacteristic(mifloraSensorDataChar)
+	if err != nil {
+		return common.SensorDataResponse{}, err
+	}
+
+	return common.ParseSensorData(bytes), nil
+}