Sharkey/src/server/api/endpoints/posts/polls/vote.ts

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/**
* Module dependencies
*/
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import $ from 'cafy';
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import Vote from '../../../../../models/poll-vote';
import Post from '../../../../../models/post';
import Watching from '../../../../../models/post-watching';
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import notify from '../../../common/notify';
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import watch from '../../../common/watch-post';
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import { publishPostStream } from '../../../event';
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/**
* Vote poll of a post
*
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* @param {any} params
* @param {any} user
* @return {Promise<any>}
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*/
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module.exports = (params, user) => new Promise(async (res, rej) => {
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// Get 'postId' parameter
const [postId, postIdErr] = $(params.postId).id().$;
if (postIdErr) return rej('invalid postId param');
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// Get votee
const post = await Post.findOne({
_id: postId
});
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if (post === null) {
return rej('post not found');
}
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if (post.poll == null) {
return rej('poll not found');
}
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// Get 'choice' parameter
const [choice, choiceError] =
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$(params.choice).number()
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.pipe(c => post.poll.choices.some(x => x.id == c))
.$;
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if (choiceError) return rej('invalid choice param');
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// if already voted
const exist = await Vote.findOne({
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postId: post._id,
userId: user._id
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});
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if (exist !== null) {
return rej('already voted');
}
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// Create vote
await Vote.insert({
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createdAt: new Date(),
postId: post._id,
userId: user._id,
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choice: choice
});
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// Send response
res();
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const inc = {};
inc[`poll.choices.${findWithAttr(post.poll.choices, 'id', choice)}.votes`] = 1;
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// Increment votes count
await Post.update({ _id: post._id }, {
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$inc: inc
});
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publishPostStream(post._id, 'poll_voted');
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// Notify
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notify(post.userId, user._id, 'poll_vote', {
postId: post._id,
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choice: choice
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});
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// Fetch watchers
Watching
.find({
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postId: post._id,
userId: { $ne: user._id },
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// 削除されたドキュメントは除く
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deletedAt: { $exists: false }
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}, {
fields: {
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userId: true
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}
})
.then(watchers => {
watchers.forEach(watcher => {
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notify(watcher.userId, user._id, 'poll_vote', {
postId: post._id,
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choice: choice
});
});
});
// この投稿をWatchする
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if (user.account.settings.autoWatch !== false) {
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watch(user._id, post);
}
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});
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function findWithAttr(array, attr, value) {
for (let i = 0; i < array.length; i += 1) {
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if (array[i][attr] === value) {
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return i;
}
}
return -1;
}