ozzymcduff / swe-id-num

Validate swedish identity numbers

SweIdNum

Validate swedish identity numbers

Installation

Add the GlobalPhone nuget package to your app. For example, using Package Manager Console:

PM> Install-Package SweIdNum

Examples

c#

First make sure to import the relevant namespaces

using SweIdNum;
using SweIdNum.Core;

Then you can parse swedish personal identity numbers

try{
  var tolvansson = PersonalIdentityNumbers.Parse("121212-1212");
  var birthdate = tolvansson.GetDate();
} catch (DoesNotMatchFormatException){
  // ...
} catch (InvalidChecksumException){
  // ...
}

If you don't want to handle potential exceptions then you use the TryParse method

if (PersonalIdentityNumbers.TryParse("121212-1212", out tolvansson)) 
{
  // to stuff
}

f#

First make sure to import the relevant namespaces. In the code below we import the module PersonalIdentityNumbers for brevity.

open SweIdNum;
open SweIdNum.Core.PersonalIdentityNumbers

Note that the parse below will throw an exception if you feed it an invalid value

let tolvansson = parse "121212-1212"
let birthdate = getDate tolvansson 

If you are unsure if it's correct and want to handle it in a more f#y way, then use tryParse

let maybeTolvansson = tryParse "121212-1212"
match maybeTolvansson with
| Choice1Of2 tolvansson -> 
    //...
| Choice2Of2 err ->
    match err with
    | DoesNotMatchFormat -> //...
    | InvalidChecksum (expected,actual) -> //...

Influences

R package sweidnumbr

swe-id-num's Issues

Samordningsnummer och testpersonnummer

Personnummer och samordningsnummer som går att testa med finns dokumenterade på skatteverkets hemsida.

Samordningsnummer används i många sammanhan varför det kan vara vettigt att implementera dessa:
https://www.skatteverket.se/privat/skatter/internationellt/bosattutomlands/samordningsnummer.4.53a97fe91163dfce2da80001279.html

Att testa med riktiga personnummer/samordningsnummer kan strida mot lag, varför det är bättre att använda skatteverkets testnummer

• https://skatteverket.se/apierochoppnadata/hittaapierochoppnadata/allaskatteverketsoppnadata.4.8bcb26d16a5646a148dbf.html
• https://www.skatteverket.se/foretagochorganisationer/myndigheter/informationsutbytemellanmyndigheter/navethamtauppgifteromfolkbokforing.4.18e1b10334ebe8bc80001754.html

Dessa är i synnerhet vettiga att använda i t.ex. enhetstester och integrationstester.

Look into

https://viktorvan.github.io/fsharp/migrating-activelogin.identity-to-property-based-tests-4/

Make package easy to use in c#

http://theburningmonk.com/2012/09/f-make-extension-methods-visible-to-c/

Update the library based modern f# and perhaps on what's written by @ploeh

https://github.com/ploeh/ploeh.github.com/blob/master/_posts/2018-12-10-danish-cpr-numbers-in-f.html

EU also provides information about how to implement it for many countries:
https://ec.europa.eu/taxation_customs/tin/

There are Java sources that can be used as a base

Generate ...

https://gist.github.com/henrik/54513
from @henrik