forked from coracle/flotilla
Jon Staab
32 lines
1020 B
TypeScript
32 lines
1020 B
TypeScript
import {hexToBytes, bytesToHex} from "@noble/hashes/utils"
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import * as nip19 from "nostr-tools/nip19"
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import {range, DAY} from "@welshman/lib"
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export const displayList = <T>(xs: T[], conj = "and", n = 6, locale = "en-US") => {
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const stringItems = xs.map(String)
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if (xs.length > n + 2) {
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const formattedList = new Intl.ListFormat(locale, {style: "long", type: "unit"}).format(
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stringItems.slice(0, n),
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)
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return `${formattedList}, ${conj} ${xs.length - n} others`
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}
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return new Intl.ListFormat(locale, {style: "long", type: "conjunction"}).format(stringItems)
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}
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export const nsecEncode = (secret: string) => nip19.nsecEncode(hexToBytes(secret))
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export const nsecDecode = (nsec: string) => {
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const {type, data} = nip19.decode(nsec)
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if (type !== "nsec") throw new Error(`Invalid nsec: ${nsec}`)
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return bytesToHex(data)
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}
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export const day = (seconds: number) => Math.floor(seconds / DAY)
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export const daysBetween = (start: number, end: number) => [...range(start, end, DAY)].map(day)
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