93 lines
2.1 KiB
TypeScript
93 lines
2.1 KiB
TypeScript
import { ApObject, getApIds } from './type';
|
|
import Resolver from './resolver';
|
|
import { resolvePerson } from './models/person';
|
|
import { unique, concat } from '@/prelude/array';
|
|
import * as promiseLimit from 'promise-limit';
|
|
import { User, IRemoteUser } from '@/models/entities/user';
|
|
|
|
type Visibility = 'public' | 'home' | 'followers' | 'specified';
|
|
|
|
type AudienceInfo = {
|
|
visibility: Visibility,
|
|
mentionedUsers: User[],
|
|
visibleUsers: User[],
|
|
};
|
|
|
|
export async function parseAudience(actor: IRemoteUser, to?: ApObject, cc?: ApObject, resolver?: Resolver): Promise<AudienceInfo> {
|
|
const toGroups = groupingAudience(getApIds(to), actor);
|
|
const ccGroups = groupingAudience(getApIds(cc), actor);
|
|
|
|
const others = unique(concat([toGroups.other, ccGroups.other]));
|
|
|
|
const limit = promiseLimit<User | null>(2);
|
|
const mentionedUsers = (await Promise.all(
|
|
others.map(id => limit(() => resolvePerson(id, resolver).catch(() => null)))
|
|
)).filter((x): x is User => x != null);
|
|
|
|
if (toGroups.public.length > 0) {
|
|
return {
|
|
visibility: 'public',
|
|
mentionedUsers,
|
|
visibleUsers: [],
|
|
};
|
|
}
|
|
|
|
if (ccGroups.public.length > 0) {
|
|
return {
|
|
visibility: 'home',
|
|
mentionedUsers,
|
|
visibleUsers: [],
|
|
};
|
|
}
|
|
|
|
if (toGroups.followers.length > 0) {
|
|
return {
|
|
visibility: 'followers',
|
|
mentionedUsers,
|
|
visibleUsers: [],
|
|
};
|
|
}
|
|
|
|
return {
|
|
visibility: 'specified',
|
|
mentionedUsers,
|
|
visibleUsers: mentionedUsers,
|
|
};
|
|
}
|
|
|
|
function groupingAudience(ids: string[], actor: IRemoteUser) {
|
|
const groups = {
|
|
public: [] as string[],
|
|
followers: [] as string[],
|
|
other: [] as string[],
|
|
};
|
|
|
|
for (const id of ids) {
|
|
if (isPublic(id)) {
|
|
groups.public.push(id);
|
|
} else if (isFollowers(id, actor)) {
|
|
groups.followers.push(id);
|
|
} else {
|
|
groups.other.push(id);
|
|
}
|
|
}
|
|
|
|
groups.other = unique(groups.other);
|
|
|
|
return groups;
|
|
}
|
|
|
|
function isPublic(id: string) {
|
|
return [
|
|
'https://www.w3.org/ns/activitystreams#Public',
|
|
'as#Public',
|
|
'Public',
|
|
].includes(id);
|
|
}
|
|
|
|
function isFollowers(id: string, actor: IRemoteUser) {
|
|
return (
|
|
id === (actor.followersUri || `${actor.uri}/followers`)
|
|
);
|
|
}
|