62 lines
1.6 KiB
TypeScript
62 lines
1.6 KiB
TypeScript
import { Event, finishEvent, Kind } from './event.ts'
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import type { EventPointer } from './nip19.ts'
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export type ReactionEventTemplate = {
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/**
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* Pass only non-nip25 tags if you have to. Nip25 tags ('e' and 'p' tags from reacted event) will be added automatically.
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*/
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tags?: string[][]
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/**
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* @default '+'
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*/
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content?: string
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created_at: number
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}
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export function finishReactionEvent(t: ReactionEventTemplate, reacted: Event<number>, privateKey: string): Event {
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const inheritedTags = reacted.tags.filter(tag => tag.length >= 2 && (tag[0] === 'e' || tag[0] === 'p'))
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return finishEvent(
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{
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...t,
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kind: Kind.Reaction,
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tags: [...(t.tags ?? []), ...inheritedTags, ['e', reacted.id], ['p', reacted.pubkey]],
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content: t.content ?? '+',
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},
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privateKey,
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)
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}
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export function getReactedEventPointer(event: Event<number>): undefined | EventPointer {
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if (event.kind !== Kind.Reaction) {
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return undefined
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}
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let lastETag: undefined | string[]
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let lastPTag: undefined | string[]
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for (let i = event.tags.length - 1; i >= 0 && (lastETag === undefined || lastPTag === undefined); i--) {
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const tag = event.tags[i]
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if (tag.length >= 2) {
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if (tag[0] === 'e' && lastETag === undefined) {
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lastETag = tag
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} else if (tag[0] === 'p' && lastPTag === undefined) {
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lastPTag = tag
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}
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}
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}
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if (lastETag === undefined || lastPTag === undefined) {
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return undefined
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}
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return {
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id: lastETag[1],
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relays: [lastETag[2], lastPTag[2]].filter(x => x !== undefined),
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author: lastPTag[1],
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}
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}
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