New Api in dependent library

[davidkroell]

The maintainer of a dependency released a new feature to create .fit-files from scratch to his library. Needed functionality added in tormoder/fit#49

bodycomposition/main.go

Lines 24 to 68 in 42fecfc

	func (bc BodyComposition) writeFitFile(writer io.Writer) error {
	weightfile := fit.WeightFile{
	UserProfile: nil,
	WeightScales: []*fit.WeightScaleMsg{
	{
	Timestamp: bc.TimeStamp,
	Weight: fit.Weight(bc.Weight * 100),
	PercentFat: uint16(bc.PercentFat * 100),
	PercentHydration: uint16(bc.PercentHydration * 100),
	BoneMass: uint16(bc.Weight * bc.PercentBone),
	MuscleMass: uint16(bc.Weight * bc.PercentMuscle),
	VisceralFatRating: uint8(bc.VisceralFatRating),
	PhysiqueRating: uint8(bc.PhysiqueRating),
	MetabolicAge: uint8(bc.MetabolicAge),
	},
	},
	}
	fitfile := fit.File{
	FileId: struct {
	Type fit.FileType
	Manufacturer fit.Manufacturer
	Product uint16
	SerialNumber uint32
	TimeCreated time.Time
	Number uint16
	ProductName string
	}{Type: fit.FileTypeWeight, Manufacturer: fit.ManufacturerTanita},
	Header: struct {
	Size byte
	ProtocolVersion byte
	ProfileVersion uint16
	DataSize uint32
	DataType [4]byte
	CRC uint16
	}{Size: 14, ProtocolVersion: 16, ProfileVersion: 2092, DataType: [4]byte{46, 70, 73, 84}},
	}
	err := fitfile.SetWeight(&weightfile)
	if err != nil {
	panic(err)
	}
	return fit.Encode(writer, &fitfile, binary.BigEndian)
	}

Tasks:

• re-implement using the new version of the package