84 lines
1.7 KiB
TypeScript
84 lines
1.7 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, { pack as packUser } from '../../../../models/user';
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import Following from '../../../../models/following';
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import notify from '../../common/notify';
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import event from '../../event';
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/**
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* Follow a user
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*
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* @param {any} params
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* @param {any} user
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* @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
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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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// 自分自身
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if (user._id.equals(userId)) {
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return rej('followee is yourself');
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}
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// Get followee
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const followee = await User.findOne({
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_id: userId
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}, {
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fields: {
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data: false,
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'account.profile': false
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}
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});
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if (followee === null) {
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return rej('user not found');
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}
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// Check if already following
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const exist = await Following.findOne({
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followerId: follower._id,
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followeeId: followee._id,
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deletedAt: { $exists: false }
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});
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if (exist !== null) {
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return rej('already following');
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}
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// Create following
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await Following.insert({
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createdAt: new Date(),
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followerId: follower._id,
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followeeId: followee._id
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});
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// Send response
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res();
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// Increment following count
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User.update(follower._id, {
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$inc: {
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followingCount: 1
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}
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});
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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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}
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});
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// Publish follow event
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event(follower._id, 'follow', await packUser(followee, follower));
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event(followee._id, 'followed', await packUser(follower, followee));
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// Notify
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notify(followee._id, follower._id, 'follow');
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});
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