97 lines
1.9 KiB
TypeScript
97 lines
1.9 KiB
TypeScript
import type {Event} from './event'
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import type {EventPointer, ProfilePointer} from './nip19'
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export type NIP10Result = {
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/**
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* Pointer to the root of the thread.
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*/
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root: EventPointer | undefined
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/**
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* Pointer to a "parent" event that parsed event replies to (responded to).
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*/
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reply: EventPointer | undefined
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/**
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* Pointers to events which may or may not be in the reply chain.
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*/
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mentions: EventPointer[]
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/**
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* List of pubkeys that are involved in the thread in no particular order.
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*/
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profiles: ProfilePointer[]
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}
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export function parse(event: Pick<Event, 'tags'>): NIP10Result {
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const result: NIP10Result = {
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reply: undefined,
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root: undefined,
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mentions: [],
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profiles: []
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}
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const eTags: string[][] = []
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for (const tag of event.tags) {
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if (tag[0] === 'e' && tag[1]) {
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eTags.push(tag)
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}
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if (tag[0] === 'p' && tag[1]) {
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result.profiles.push({
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pubkey: tag[1],
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relays: tag[2] ? [tag[2]] : []
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})
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}
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}
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for (let eTagIndex = 0; eTagIndex < eTags.length; eTagIndex++) {
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const eTag = eTags[eTagIndex]
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const [_, eTagEventId, eTagRelayUrl, eTagMarker] = eTag as [
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string,
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string,
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undefined | string,
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undefined | string
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]
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const eventPointer: EventPointer = {
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id: eTagEventId,
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relays: eTagRelayUrl ? [eTagRelayUrl] : []
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}
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const isFirstETag = eTagIndex === 0
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const isLastETag = eTagIndex === eTags.length - 1
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if (eTagMarker === 'root') {
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result.root = eventPointer
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continue
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}
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if (eTagMarker === 'reply') {
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result.reply = eventPointer
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continue
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}
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if (eTagMarker === 'mention') {
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result.mentions.push(eventPointer)
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continue
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}
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if (isFirstETag) {
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result.root = eventPointer
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continue
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}
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if (isLastETag) {
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result.reply = eventPointer
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continue
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}
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result.mentions.push(eventPointer)
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}
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return result
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}
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