84 lines
2 KiB
TypeScript
84 lines
2 KiB
TypeScript
import $ from 'cafy'; import ID from '../../../../cafy-id';
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import User, { ILocalUser } from '../../../../models/user';
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import Following from '../../../../models/following';
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import { pack } from '../../../../models/user';
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import { getFriendIds } from '../../common/get-friends';
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/**
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* Get followers of a user
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*/
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export default (params: any, me: ILocalUser) => new Promise(async (res, rej) => {
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// Get 'userId' parameter
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const [userId, userIdErr] = $.type(ID).get(params.userId);
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if (userIdErr) return rej('invalid userId param');
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// Get 'iknow' parameter
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const [iknow = false, iknowErr] = $.bool.optional.get(params.iknow);
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if (iknowErr) return rej('invalid iknow param');
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// Get 'limit' parameter
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const [limit = 10, limitErr] = $.num.optional.range(1, 100).get(params.limit);
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if (limitErr) return rej('invalid limit param');
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// Get 'cursor' parameter
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const [cursor = null, cursorErr] = $.type(ID).optional.get(params.cursor);
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if (cursorErr) return rej('invalid cursor param');
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// Lookup user
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const user = await User.findOne({
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_id: userId
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}, {
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fields: {
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_id: true
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}
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});
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if (user === null) {
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return rej('user not found');
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}
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// Construct query
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const query = {
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followeeId: user._id
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} as any;
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// ログインしていてかつ iknow フラグがあるとき
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if (me && iknow) {
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// Get my friends
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const myFriends = await getFriendIds(me._id);
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query.followerId = {
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$in: myFriends
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};
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}
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// カーソルが指定されている場合
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if (cursor) {
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query._id = {
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$lt: cursor
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};
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}
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// Get followers
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const following = await Following
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.find(query, {
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limit: limit + 1,
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sort: { _id: -1 }
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});
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// 「次のページ」があるかどうか
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const inStock = following.length === limit + 1;
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if (inStock) {
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following.pop();
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}
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// Serialize
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const users = await Promise.all(following.map(async f =>
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await pack(f.followerId, me, { detail: true })));
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// Response
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res({
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users: users,
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next: inStock ? following[following.length - 1]._id : null,
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});
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});
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