45 lines
1.3 KiB
TypeScript
45 lines
1.3 KiB
TypeScript
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import { I18nValue, I18nValueDynamic } from "../types";
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export function ordinalSuffixEnglish(n: number): string {
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const v = n % 100
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if (v > 3 && v < 21) return 'th'
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switch (v % 10) {
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case 1:
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return 'st'
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case 2:
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return 'nd'
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case 3:
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return 'rd'
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default:
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return 'th'
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}
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}
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export function pluralizeEnglish<T>(n: number, one: T, many: T): T {
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return n === 1 ? one : many
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}
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export function createPluralEnglish<Args extends any[] = []>(
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one: I18nValue<[number, ...Args]>,
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many: I18nValue<[number, ...Args]>
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): I18nValueDynamic<[number, ...Args]> {
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if (typeof one === 'function' && typeof many === 'function') {
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return (n, ...args) => (n === 1 ? one(n, ...args) : many(n, ...args))
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}
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if (typeof one === 'string' && typeof many === 'string') {
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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return (n, ...args) => (n === 1 ? one : many)
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}
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if (typeof one === 'string' && typeof many === 'function') {
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return (n, ...args) => (n === 1 ? one : many(n, ...args))
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}
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if (typeof one === 'function' && typeof many === 'string') {
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return (n, ...args) => (n === 1 ? one(n, ...args) : many)
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}
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throw new TypeError()
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}
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