yumechi-no-kuni/src/server/api/endpoints/notes/replies.ts

import $ from 'cafy'; import ID from '../../../../cafy-id';
import Note, { pack } from '../../../../models/note';

/**
 * Get replies of a note
 */
module.exports = (params, user) => new Promise(async (res, rej) => {
	// Get 'noteId' parameter
	const [noteId, noteIdErr] = $.type(ID).get(params.noteId);
	if (noteIdErr) return rej('invalid noteId param');

	// Get 'limit' parameter
	const [limit = 10, limitErr] = $.num.optional().range(1, 100).get(params.limit);
	if (limitErr) return rej('invalid limit param');

	// Get 'offset' parameter
	const [offset = 0, offsetErr] = $.num.optional().min(0).get(params.offset);
	if (offsetErr) return rej('invalid offset param');

	// Lookup note
	const note = await Note.findOne({
		_id: noteId
	});

	if (note === null) {
		return rej('note not found');
	}

	const ids = note._replyIds.slice(offset, offset + limit);

	// Serialize
	res(await Promise.all(ids.map(id => pack(id, user))));
});