133 lines
4.2 KiB
JavaScript
133 lines
4.2 KiB
JavaScript
const createRequest = require('../../utils/api');
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const config = require('../../config.json');
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const getUserLevel = require('../../utils/getUserLevel');
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const Vote = require('../../db/models/Vote');
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async function EditAnswerCommentVote(req, res) {
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const { user } = req;
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const { question_id, answer_id, comment_id } = req.params;
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const { operation } = req.body;
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// Verify an operation is in response body
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if (!operation) return res.status(400).send(config.errorIncomplete);
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// Verify user has required permissions
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const userLevel = getUserLevel(user.points);
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if (operation === 'upvote' && userLevel < 2) {
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return res.status(403).send(config.errorForbidden);
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}
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if (operation === 'downvote' && userLevel < 5) {
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return res.status(403).send(config.errorForbidden);
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}
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const URL = `/questions/${question_id}/answers/${answer_id}/comments/${comment_id}/vote/${user.username}`;
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// Get cached vote, and refresh cache if not present
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let cachedVote = await Vote.findOneAndDelete({
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parent_id: comment_id,
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creator: user.username,
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});
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if (!cachedVote) {
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const { error, vote } = await createRequest('get', URL);
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cachedVote = !error ? { status: vote } : { status: null };
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}
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if (cachedVote.status === 'upvoted') {
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// Undo upvote if previously upvoted
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const { success } = await createRequest('patch', URL, {
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operation: 'decrement',
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target: 'upvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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// If downvote, increment downvotes and cache vote
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if (operation === 'downvote') {
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const { success } = await createRequest('patch', URL, {
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operation: 'increment',
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target: 'downvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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await Vote.create({
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parent_id: comment_id,
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creator: user.username,
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status: 'downvoted',
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docModel: 'Comment',
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});
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return res.send({ vote: 'downvoted' });
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}
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} else if (cachedVote.status === 'downvoted') {
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// Decrement downvotes if previously downvoted
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const { success } = await createRequest('patch', URL, {
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operation: 'decrement',
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target: 'downvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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// If operation is upvoted, cache and change vote
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if (operation === 'upvote') {
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const { success } = await createRequest('patch', URL, {
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operation: 'increment',
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target: 'upvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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await Vote.create({
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parent_id: comment_id,
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creator: user.username,
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status: 'upvoted',
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docModel: 'Comment',
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});
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return res.send({ vote: 'upvoted' });
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}
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} else {
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if (operation === 'upvote') {
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// Increment upvotes
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const { success } = await createRequest('patch', URL, {
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operation: 'increment',
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target: 'upvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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await Vote.create({
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parent_id: comment_id,
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creator: user.username,
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status: 'upvoted',
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docModel: 'Comment',
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});
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return res.send({ vote: 'upvoted' });
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} else if (operation === 'downvote') {
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// Increment downvotes
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const { success } = await createRequest('patch', URL, {
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operation: 'increment',
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target: 'downvotes',
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});
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if (!success) return res.status(500).send(config.errorGeneric);
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await Vote.create({
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parent_id: comment_id,
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creator: user.username,
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status: 'downvoted',
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docModel: 'Comment',
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});
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return res.send({ vote: 'downvoted' });
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}
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}
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return res.send({ vote: null });
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}
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module.exports = EditAnswerCommentVote;
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