This package provides validation for Swedish zip codes (or postal codes) based on the provided CSV. The CSV was generated at 2019-01-19 by traversing the Bring API described below between 10000 and 99999.

Since there're constantly changes in zip codes in Sweden a lot of them are missing in the CSV submodule. This package supports the possibiity to fallback to an HTTPS API from Bring.

If you call Store() on the ZipCodes type you can store all newly found zip codes in the existing CSV file for faster and offline execution in the future.

A few zip codes are listed as multiple matches which means they're shared between multiple locations. Instead of choosing one of them none is chosen so to see which these are you can use grep ',$' sweden-zipcode.csv.

Example

set ex (grep  ',$' sweden-zipcode.csv | string sub --length 5 | head -1); \
    curl -sL \
    "https://api.bring.com/shippingguide/api/postalCode.json?clientUrl=ex&country=SE&pnr=$ex" \
    | jq .multipleMatches

[
  "Södertälje",
  "Enhörna"
]

// One time validation
sz.Valid("12010") // true
sz.Valid(12010)   // true

// Multiple validations - create a cache
httpFallback := true
zc := sz.NewZipCodes(httpFallback)
zc.ClientURL("https://my.url.se")

zc.Valid("12010") // true
zc.Valid(12010)   // true
zc.Valid(99999)   // false

zc.Store()        // Updates the CSV file with new zip codes.