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import { toArray, unique } from '../../../prelude/array';
import { IObject, isMention, IApMention } from '../type';
import { resolvePerson } from './person';
import * as promiseLimit from 'promise-limit';
import Resolver from '../resolver';
import { User } from '../../../models/entities/user';
export async function extractApMentions(tags: IObject | IObject[] | null | undefined) {
const hrefs = unique(extractApMentionObjects(tags).map(x => x.href as string));
const resolver = new Resolver();
const limit = promiseLimit<User | null>(2);
const mentionedUsers = (await Promise.all(
hrefs.map(x => limit(() => resolvePerson(x, resolver).catch(() => null)))
)).filter((x): x is User => x != null);
return mentionedUsers;
}
export function extractApMentionObjects(tags: IObject | IObject[] | null | undefined): IApMention[] {
if (tags == null) return [];
return toArray(tags).filter(isMention);
}
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