Sharkey/src/server/api/endpoints/users/followers.ts

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import $ from 'cafy'; import ID, { transform } from '../../../../misc/cafy-id';
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import User, { ILocalUser } from '../../../../models/user';
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import Following from '../../../../models/following';
import { pack } from '../../../../models/user';
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import { getFriendIds } from '../../common/get-friends';
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import getParams from '../../get-params';
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export const meta = {
desc: {
'ja-JP': '指定したユーザーのフォロワー一覧を取得します。',
'en-US': 'Get followers of a user.'
},
requireCredential: false,
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params: {
userId: {
validator: $.type(ID),
transform: transform,
},
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limit: {
validator: $.num.optional.range(1, 100),
default: 10
},
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cursor: {
validator: $.type(ID).optional,
default: null as any,
transform: transform,
},
iknow: {
validator: $.bool.optional,
default: false,
}
}
};
export default (params: any, me: ILocalUser) => new Promise(async (res, rej) => {
const [ps, psErr] = getParams(meta, params);
if (psErr) return rej(psErr);
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// Lookup user
const user = await User.findOne({
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_id: ps.userId
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}, {
fields: {
_id: true
}
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});
if (user === null) {
return rej('user not found');
}
// Construct query
const query = {
followeeId: user._id
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} as any;
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// ログインしていてかつ iknow フラグがあるとき
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if (me && ps.iknow) {
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// Get my friends
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const myFriends = await getFriendIds(me._id);
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query.followerId = {
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$in: myFriends
};
}
// カーソルが指定されている場合
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if (ps.cursor) {
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query._id = {
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$lt: ps.cursor
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};
}
// Get followers
const following = await Following
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.find(query, {
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limit: ps.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 === ps.limit + 1;
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if (inStock) {
following.pop();
}
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const users = await Promise.all(following.map(f => pack(f.followerId, me, { detail: true })));
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res({
users: users,
next: inStock ? following[following.length - 1]._id : null,
});
});