go-mobilityid

Porting of the Scala MobilityId library to Go.

Features

• Creates instances of DIN91826, ISO15118-1, or eMI3 contract IDs
• Creates instances of DIN91826 or ISO15118-1 EVSE IDs
• Computes (or validates, if provided) their check digit

Usage

// Contract IDs

emi3Id, err := emi3.NewContractIdNoCheckDigit("NL", "TNM", "00122045")
if err != nil {
  // ...
}

emi3Id, err = emi3.NewContractId("NL", "TNM", "00122045", 'K')
if err != nil {
  // ...
}

fmt.Println(emi3Id.CountryCode()) // "NL"
fmt.Println(emi3Id.PartyCode()) // "TNM"
fmt.Println(emi3Id.InstanceValue()) // "00122045"
fmt.Println(emi3Id.CheckDigit()) // 'K'

fmt.Println(emi3Id.PartyId()) // "NL-TNM"
fmt.Println(emi3Id.CompactPartyId()) // "NLTNM"

fmt.Println(emi3Id.String()) // "NL-TNM-C00122045-K"
fmt.Println(emi3Id.CompactString()) // "NLTNMC00122045K"
fmt.Println(emi3Id.CompactStringNoCheckDigit()) // "NLTNMC00122045"

dinId, err := convert.Emi3ToDin(id)
if err != nil {
  // ...
}

fmt.Println(dinId.String()) // "NL-TNM-012204-5"

// EVSE IDs

isoId, err := iso.NewEvseId("NL", "TNM", "030123456*0")
if err != nil {
  // ...
}

fmt.Println(isoId.CountryCode()) // "NL"
fmt.Println(isoId.OperatorCode()) // "TNM"
fmt.Println(isoId.PowerOutletId()) // "030123456*0"

fmt.Println(isoId.String()) // "NL*TNM*E030123456*0"
fmt.Println(isoId.CompactString()) // "NLTNME0301234560"

Differences with original library

EMI3 instance value

Given the EMI3 contract ID NL-TNM-C12345678-J, getting the instanceValue:

• the Scala library will return (at the moment of writing, v1.1.0) C12345678
• this library's implementation, will return 12345678

This is because the leading C character is considered part of the format, rather than of the instance value.

ContractId conversions

Direct conversions from ISO to DIN and vice versa, which are deprecated in the original library, have not been ported.

Caveats

Types are public so that they can be referenced by clients, which means that it is technically possible to initialize them directly (e.g. contractid.Emi3ContractId{}); this will, however, create an empty instance which cannot be modified in any way because it only provides functions exported by the contractId.Reader interface, so it's effectively of no use to a client.