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