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99 lines
2.8 KiB
99 lines
2.8 KiB
// content-vote.js
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// Copyright (C) 2022 DTP Technologies, LLC
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// License: Apache-2.0
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'use strict';
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const mongoose = require('mongoose');
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const ContentVote = mongoose.model('ContentVote');
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const ioEmitter = require('socket.io-emitter');
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const { SiteService } = require('../../lib/site-lib');
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class ContentVoteService extends SiteService {
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constructor (dtp) {
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super(dtp, module.exports);
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}
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async start ( ) {
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await super.start();
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this.emitter = ioEmitter(this.dtp.redis);
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}
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async recordVote (user, resourceType, resource, vote) {
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const NOW = new Date();
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const ResourceModel = mongoose.model(resourceType);
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const updateOp = { $inc: { } };
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let message;
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const contentVote = await ContentVote.findOne({
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user: user._id,
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resource: resource._id,
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});
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this.log.debug('processing content vote', { resource: resource._id, user: user._id, vote, contentVote });
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if (!contentVote) {
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/*
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* It's a new vote from a new user
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*/
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await ContentVote.create({
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created: NOW,
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resourceType,
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resource: resource._id,
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user: user._id,
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vote
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});
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if (vote === 'up') {
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updateOp.$inc['resourceStats.upvoteCount'] = 1;
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message = 'Comment upvote recorded';
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} else {
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updateOp.$inc['resourceStats.downvoteCount'] = 1;
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message = 'Comment downvote recorded';
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}
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} else {
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/*
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* If vote not changed, do no further work.
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*/
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if (contentVote.vote === vote) {
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const updatedResource = await ResourceModel.findById(resource._id).select('resourceStats');
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return { message: "Comment vote unchanged", resourceStats: updatedResource.resourceStats };
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}
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/*
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* Update the user's existing vote
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*/
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await ContentVote.updateOne(
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{ _id: contentVote._id },
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{ $set: { vote } }
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);
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/*
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* Adjust resource's stats based on the changed vote
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*/
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if (vote === 'up') {
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updateOp.$inc['resourceStats.upvoteCount'] = 1;
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updateOp.$inc['resourceStats.downvoteCount'] = -1;
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message = 'Comment vote changed to upvote';
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} else {
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updateOp.$inc['resourceStats.upvoteCount'] = -1;
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updateOp.$inc['resourceStats.downvoteCount'] = 1;
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message = 'Comment vote changed to downvote';
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}
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}
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this.log.info('updating resource stats', { resourceType, resource, updateOp });
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await ResourceModel.updateOne({ _id: resource._id }, updateOp);
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const updatedResource = await ResourceModel.findById(resource._id).select('resourceStats');
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return { message, resourceStats: updatedResource.resourceStats };
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}
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}
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module.exports = {
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slug: 'content-vote',
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name: 'contentVote',
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create: (dtp) => { return new ContentVoteService(dtp); },
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};
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