55 lines
1.5 KiB
TypeScript
55 lines
1.5 KiB
TypeScript
import { u256 } from "Nostr";
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import { default as NEvent } from "Nostr/Event";
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import EventKind from "Nostr/EventKind";
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import Tag from "Nostr/Tag";
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export default class Thread {
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Root?: Tag;
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ReplyTo?: Tag;
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Mentions: Array<Tag>;
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PubKeys: Array<u256>;
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constructor() {
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this.Mentions = [];
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this.PubKeys = [];
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}
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/**
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* Extract thread information from an Event
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* @param ev Event to extract thread from
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*/
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static ExtractThread(ev: NEvent) {
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const isThread = ev.Tags.some(a => a.Key === "e");
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if (!isThread) {
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return null;
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}
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const shouldWriteMarkers = ev.Kind === EventKind.TextNote;
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const ret = new Thread();
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const eTags = ev.Tags.filter(a => a.Key === "e");
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const marked = eTags.some(a => a.Marker !== undefined);
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if (!marked) {
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ret.Root = eTags[0];
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ret.Root.Marker = shouldWriteMarkers ? "root" : undefined;
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if (eTags.length > 1) {
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ret.ReplyTo = eTags[1];
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ret.ReplyTo.Marker = shouldWriteMarkers ? "reply" : undefined;
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}
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if (eTags.length > 2) {
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ret.Mentions = eTags.slice(2);
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if (shouldWriteMarkers) {
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ret.Mentions.forEach(a => (a.Marker = "mention"));
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}
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}
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} else {
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const root = eTags.find(a => a.Marker === "root");
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const reply = eTags.find(a => a.Marker === "reply");
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ret.Root = root;
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ret.ReplyTo = reply;
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ret.Mentions = eTags.filter(a => a.Marker === "mention");
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}
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ret.PubKeys = Array.from(new Set(ev.Tags.filter(a => a.Key === "p").map(a => <u256>a.PubKey)));
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return ret;
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}
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}
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