64 lines
1.6 KiB
TypeScript
64 lines
1.6 KiB
TypeScript
import { decode } from './nip19.ts'
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import { NOSTR_URI_REGEX, type NostrURI } from './nip21.ts'
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/** Regex to find NIP-21 URIs inside event content. */
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export const regex = () => new RegExp(`\\b${NOSTR_URI_REGEX.source}\\b`, 'g')
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/** Match result for a Nostr URI in event content. */
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export interface NostrURIMatch extends NostrURI {
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/** Index where the URI begins in the event content. */
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start: number
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/** Index where the URI ends in the event content. */
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end: number
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}
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/** Find and decode all NIP-21 URIs. */
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export function* matchAll(content: string): Iterable<NostrURIMatch> {
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const matches = content.matchAll(regex())
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for (const match of matches) {
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try {
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const [uri, value] = match
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yield {
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uri: uri as `nostr:${string}`,
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value,
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decoded: decode(value),
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start: match.index!,
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end: match.index! + uri.length,
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}
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} catch (_e) {
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// do nothing
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}
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}
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}
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/**
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* Replace all occurrences of Nostr URIs in the text.
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*
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* WARNING: using this on an HTML string is potentially unsafe!
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*
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* @example
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* ```ts
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* nip27.replaceAll(event.content, ({ decoded, value }) => {
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* switch(decoded.type) {
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* case 'npub':
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* return renderMention(decoded)
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* case 'note':
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* return renderNote(decoded)
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* default:
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* return value
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* }
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* })
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* ```
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*/
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export function replaceAll(content: string, replacer: (match: NostrURI) => string): string {
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return content.replaceAll(regex(), (uri, value: string) => {
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return replacer({
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uri: uri as `nostr:${string}`,
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value,
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decoded: decode(value),
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})
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})
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}
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