Array/Object keys to type?

So I got this object:

export const supportedLanguages: {
    afr: Language;
    ara: Language;
    ces: Language;
    cmn: Language;
    dan: Language;
    deu: Language;
    div: Language;
    ell: Language;
    fas: Language;
    fra: Language;
    gle: Language;
    grc: Language;
    hun: Language;
    hye: Language;
    jav: Language;
    jpn: Language;
    kat: Language;
    kor: Language;
    lat: Language;
    lav: Language;
    lit: Language;
    mkd: Language;
    nld: Language;
    nno: Language;
    nob: Language;
    nor: Language;
    pol: Language;
    por: Language;
    pus: Language;
    ron: Language;
    rus: Language;
    slk: Language;
    spa: Language;
    srp: Language;
    swe: Language;
    tha: Language;
    tur: Language;
    ukr: Language;
    urd: Language;
    vie: Language;
};

export const supportedLanguages: {
    afr: Language;
    ara: Language;
    ces: Language;
    cmn: Language;
    dan: Language;
    deu: Language;
    div: Language;
    ell: Language;
    fas: Language;
    fra: Language;
    gle: Language;
    grc: Language;
    hun: Language;
    hye: Language;
    jav: Language;
    jpn: Language;
    kat: Language;
    kor: Language;
    lat: Language;
    lav: Language;
    lit: Language;
    mkd: Language;
    nld: Language;
    nno: Language;
    nob: Language;
    nor: Language;
    pol: Language;
    por: Language;
    pus: Language;
    ron: Language;
    rus: Language;
    slk: Language;
    spa: Language;
    srp: Language;
    swe: Language;
    tha: Language;
    tur: Language;
    ukr: Language;
    urd: Language;
    vie: Language;
};

Which as you can see has a few keys, you can pass these keys in an array, how would I make a ArkType for them automatically/dynamically since this object updates often. Without ArkType we currently use the following:

export type SupportedISOs = keyof typeof supportedLanguages;
export interface Options {
  //Other options
  languages: SupportedISOs[] // ("afr" | "ara" | "ces" | "cmn" | "dan" | "deu" | "div" | "ell" | "fas" | "fra" | "gle" | "grc" | "hun" | "hye" | "jav" | "jpn" | "kat" | "kor" | "lat" | "lav" | "lit" | "mkd" | "nld" | "nno" | "nob" | "nor" | "pol" | "por" | "pus" | "ron" | "rus" | "slk" | "spa" | "srp" | "swe" | "tha" | "tur" | "ukr" | "urd" | "vie")[];
}

export type SupportedISOs = keyof typeof supportedLanguages;
export interface Options {
  //Other options
  languages: SupportedISOs[] // ("afr" | "ara" | "ces" | "cmn" | "dan" | "deu" | "div" | "ell" | "fas" | "fra" | "gle" | "grc" | "hun" | "hye" | "jav" | "jpn" | "kat" | "kor" | "lat" | "lav" | "lit" | "mkd" | "nld" | "nno" | "nob" | "nor" | "pol" | "por" | "pus" | "ron" | "rus" | "slk" | "spa" | "srp" | "swe" | "tha" | "tur" | "ukr" | "urd" | "vie")[];
}

Can't figure out yet how I would make this in ArkType. Anyone have some ideas?

4 Replies

Dimava•2y ago

In 0.15 that's

const supportedLanguages = { en: Language, fr: Language }
export type Lang = keyof typeof supportedLanguages;
export const Lang = declare<Lang>().type('===', ...Object.keys(supportedLanguages ));

const supportedLanguages = { en: Language, fr: Language }
export type Lang = keyof typeof supportedLanguages;
export const Lang = declare<Lang>().type('===', ...Object.keys(supportedLanguages ));

ssalbdivad•2y ago

If you already have them in an object I would try something like this:

export const myType = type(
    Object.keys(supportedLanguages)
        .map((lang) => `'${lang}'`)
        .join("|") as Infer<keyof typeof supportedLanguages>
)

export const myType = type(
    Object.keys(supportedLanguages)
        .map((lang) => `'${lang}'`)
        .join("|") as Infer<keyof typeof supportedLanguages>
)

You can try messing around with the type here! https://stackblitz.com/edit/mrvfrm-gq6z2z?file=type.ts

StackBlitz

ArkType Example (forked) - StackBlitz

ArkType type demo

Dimava•2y ago

JSON.stringify

Bas950OP•2y ago

Thanks both! Will use:

arrayOf(
  type(
    Object.keys(supportedLanguages).map(lang => `'${lang}'`)
    .join("|") as Infer<SupportedISOs>
  )
)

arrayOf(
  type(
    Object.keys(supportedLanguages).map(lang => `'${lang}'`)
    .join("|") as Infer<SupportedISOs>
  )
)

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Array/Object keys to type?