102 lines
2 KiB
JavaScript
102 lines
2 KiB
JavaScript
'use strict';
|
|
|
|
/**
|
|
* Module dependencies
|
|
*/
|
|
import * as mongo from 'mongodb';
|
|
import User from '../../models/user';
|
|
import Following from '../../models/following';
|
|
import serialize from '../../serializers/user';
|
|
import getFriends from '../../common/get-friends';
|
|
|
|
/**
|
|
* Get following users of a user
|
|
*
|
|
* @param {Object} params
|
|
* @param {Object} me
|
|
* @return {Promise<object>}
|
|
*/
|
|
module.exports = (params, me) =>
|
|
new Promise(async (res, rej) =>
|
|
{
|
|
// Get 'user_id' parameter
|
|
const userId = params.user_id;
|
|
if (userId === undefined || userId === null) {
|
|
return rej('user_id is required');
|
|
}
|
|
|
|
// Get 'iknow' parameter
|
|
const iknow = params.iknow === 'true';
|
|
|
|
// Get 'limit' parameter
|
|
let limit = params.limit;
|
|
if (limit !== undefined && limit !== null) {
|
|
limit = parseInt(limit, 10);
|
|
|
|
// From 1 to 100
|
|
if (!(1 <= limit && limit <= 100)) {
|
|
return rej('invalid limit range');
|
|
}
|
|
} else {
|
|
limit = 10;
|
|
}
|
|
|
|
// Get 'cursor' parameter
|
|
const cursor = params.cursor || null;
|
|
|
|
// Lookup user
|
|
const user = await User.findOne({
|
|
_id: new mongo.ObjectID(userId)
|
|
});
|
|
|
|
if (user === null) {
|
|
return rej('user not found');
|
|
}
|
|
|
|
// Construct query
|
|
const query = {
|
|
follower_id: user._id,
|
|
deleted_at: { $exists: false }
|
|
};
|
|
|
|
// ログインしていてかつ iknow フラグがあるとき
|
|
if (me && iknow) {
|
|
// Get my friends
|
|
const myFriends = await getFriends(me._id);
|
|
|
|
query.followee_id = {
|
|
$in: myFriends
|
|
};
|
|
}
|
|
|
|
// カーソルが指定されている場合
|
|
if (cursor) {
|
|
query._id = {
|
|
$lt: new mongo.ObjectID(cursor)
|
|
};
|
|
}
|
|
|
|
// Get followers
|
|
const following = await Following
|
|
.find(query, {}, {
|
|
limit: limit + 1,
|
|
sort: { _id: -1 }
|
|
})
|
|
.toArray();
|
|
|
|
// 「次のページ」があるかどうか
|
|
const inStock = following.length === limit + 1;
|
|
if (inStock) {
|
|
following.pop();
|
|
}
|
|
|
|
// Serialize
|
|
const users = await Promise.all(following.map(async f =>
|
|
await serialize(f.followee_id, me, { detail: true })));
|
|
|
|
// Response
|
|
res({
|
|
users: users,
|
|
next: inStock ? following[following.length - 1]._id : null,
|
|
});
|
|
});
|