rudeshark.net/src/server/api/endpoints/following/create.ts

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/**
* Module dependencies
*/
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import $ from 'cafy';
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import User, { pack as packUser } from '../../models/user';
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import Following from '../../models/following';
import notify from '../../common/notify';
import event from '../../event';
/**
* Follow a user
*
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* @param {any} params
* @param {any} user
* @return {Promise<any>}
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*/
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module.exports = (params, user) => new Promise(async (res, rej) => {
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const follower = user;
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// Get 'userId' parameter
const [userId, userIdErr] = $(params.userId).id().$;
if (userIdErr) return rej('invalid userId param');
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// 自分自身
if (user._id.equals(userId)) {
return rej('followee is yourself');
}
// Get followee
const followee = await User.findOne({
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_id: userId
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}, {
fields: {
data: false,
'account.profile': false
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}
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});
if (followee === null) {
return rej('user not found');
}
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// Check if already following
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const exist = await Following.findOne({
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followerId: follower._id,
followeeId: followee._id,
deletedAt: { $exists: false }
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});
if (exist !== null) {
return rej('already following');
}
// Create following
await Following.insert({
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createdAt: new Date(),
followerId: follower._id,
followeeId: followee._id
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});
// Send response
res();
// Increment following count
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User.update(follower._id, {
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$inc: {
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followingCount: 1
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}
});
// Increment followers count
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User.update({ _id: followee._id }, {
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$inc: {
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followersCount: 1
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}
});
// Publish follow event
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event(follower._id, 'follow', await packUser(followee, follower));
event(followee._id, 'followed', await packUser(follower, followee));
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// Notify
notify(followee._id, follower._id, 'follow');
});