snort/src/element/Thread.js

import Event from "../nostr/Event";
import EventKind from "../nostr/EventKind";
import Note from "./Note";
import NoteGhost from "./NoteGhost";

export default function Thread(props) {
    /** @type {Array<Event>} */
    const notes = props.notes?.map(a => Event.FromObject(a));

    // root note has no thread info
    const root = notes.find(a => a.GetThread() === null);

    function reactions(id) {
        return notes?.filter(a => a.Kind === EventKind.Reaction && a.GetThread()?.Root?.Event === id);
    }

    const repliesToRoot = notes?.
        filter(a => a.GetThread()?.Root?.Event === root?.Id && a.Kind === EventKind.TextNote)
        .sort((a, b) => b.CreatedAt - a.CreatedAt);
    return (
        <>
            {root === undefined ?
                <NoteGhost />
                : <Note data={root?.ToObject()} reactions={reactions(root?.Id)} />}
            {repliesToRoot?.map(a => <Note key={a.Id} data={a.ToObject()} reactions={reactions(a.Id)} />)}
        </>
    );
}