92 lines
2 KiB
TypeScript
92 lines
2 KiB
TypeScript
/**
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* Module dependencies
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*/
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import $ from 'cafy';
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import User 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 getFriends 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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* @param {any} params
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* @param {any} me
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* @return {Promise<any>}
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*/
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module.exports = (params, me) => new Promise(async (res, rej) => {
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// Get 'userId' parameter
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const [userId, userIdErr] = $(params.userId).id().$;
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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] = $(params.iknow).optional.boolean().$;
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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] = $(params.limit).optional.number().range(1, 100).$;
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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] = $(params.cursor).optional.id().$;
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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 getFriends(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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