TaxID.utils.ts50 lines · main

1	import { TAX_IDS, TaxId } from './TaxID.constants'
2
3	/**
4	* Returns the country code to send to Orb for tax validation.
5	*
6	* Most tax IDs use their display country (countryIso2), but some territories
7	* share another country's tax system — e.g., Isle of Man uses GB VAT.
8	* In these cases, taxCountryIso2 overrides the country sent to Orb.
9	*/
10	export const getEffectiveTaxCountry = (taxId: TaxId): string =>
11	taxId.taxCountryIso2 ?? taxId.countryIso2
12
13	/**
14	* Resolves a stored tax ID (from Orb) back to its TAX_IDS UI entry.
15	*
16	* Uses billingCountry (from the customer's address) to disambiguate when
17	* multiple entries share the same Orb type+country — e.g., both "UK VAT"
18	* and "IM VAT" map to {type: 'gb_vat', country: 'GB'} in Orb, but differ
19	* by billing address country (GB vs IM).
20	*
21	* When billingCountry is unavailable, falls back to the stored country.
22	*/
23	export const resolveStoredTaxId = (
24	type: string,
25	taxCountry: string,
26	billingCountry?: string
27	): TaxId | undefined => {
28	const candidates = TAX_IDS.filter((option) => option.type === type)
29	const preferredCountry = billingCountry ?? taxCountry
30
31	return candidates.find((o) => o.countryIso2 === preferredCountry)
32	}
33
34	export const sanitizeTaxIdValue = (taxId: { name: string; value: string }) => {
35	const selectedTaxId = TAX_IDS.find((option) => option.name === taxId.name)
36
37	const vatIdPrefix = selectedTaxId?.vatPrefix
38
39	// if the value doesn't start with the prefix, prepend them
40	if (vatIdPrefix && !taxId.value.startsWith(vatIdPrefix)) {
41	return `${vatIdPrefix}${taxId.value}`
42	}
43
44	return taxId.value
45	}
46
47	/** Ignore id property amongst tax ids */
48	export const checkTaxIdEqual = (a: any, b: any) => {
49	return a?.type === b?.type && a?.value === b?.value
50	}