100 lines
1.9 KiB
JavaScript
100 lines
1.9 KiB
JavaScript
'use strict';
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/**
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* Module dependencies
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*/
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import * as mongo from 'mongodb';
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import Vote from '../../../models/poll-vote';
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import Post from '../../../models/post';
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import notify from '../../../common/notify';
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/**
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* Vote poll of a post
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*
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* @param {Object} params
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* @param {Object} user
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* @return {Promise<object>}
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*/
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module.exports = (params, user) =>
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new Promise(async (res, rej) => {
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// Get 'post_id' parameter
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const postId = params.post_id;
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if (postId === undefined || postId === null) {
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return rej('post_id is required');
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}
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// Validate id
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if (!mongo.ObjectID.isValid(postId)) {
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return rej('incorrect post_id');
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}
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// Get votee
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const post = await Post.findOne({
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_id: new mongo.ObjectID(postId)
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});
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if (post === null) {
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return rej('post not found');
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}
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if (post.poll == null) {
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return rej('poll not found');
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}
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// Get 'choice' parameter
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const choice = params.choice;
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if (choice == null) {
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return rej('choice is required');
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}
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// Validate choice
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if (!post.poll.choices.some(x => x.id == choice)) {
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return rej('invalid choice');
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}
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// if already voted
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const exist = await Vote.findOne({
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post_id: post._id,
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user_id: user._id
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});
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if (exist !== null) {
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return rej('already voted');
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}
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// Create vote
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await Vote.insert({
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created_at: new Date(),
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post_id: post._id,
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user_id: user._id,
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choice: choice
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});
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// Send response
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res();
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const inc = {};
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inc[`poll.choices.${findWithAttr(post.poll.choices, 'id', choice)}.votes`] = 1;
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console.log(inc);
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// Increment likes count
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Post.update({ _id: post._id }, {
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$inc: inc
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});
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// Notify
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notify(post.user_id, user._id, 'poll_vote', {
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post_id: post._id,
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choice: choice
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});
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});
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function findWithAttr(array, attr, value) {
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for (let i = 0; i < array.length; i += 1) {
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if (array[i][attr] === value) {
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return i;
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}
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}
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return -1;
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}
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