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/**
* Module dependencies
*/
import $ from 'cafy';
import Channel from '../../models/channel';
import Watching from '../../models/channel-watching';
/**
* Watch a channel
*
* @param {any} params
* @param {any} user
* @return {Promise<any>}
*/
module.exports = (params, user) => new Promise(async (res, rej) => {
// Get 'channelId' parameter
const [channelId, channelIdErr] = $(params.channelId).id().$;
if (channelIdErr) return rej('invalid channelId param');
//#region Fetch channel
const channel = await Channel.findOne({
_id: channelId
});
if (channel === null) {
return rej('channel not found');
}
//#endregion
//#region Check whether already watching
const exist = await Watching.findOne({
userId: user._id,
channelId: channel._id,
deletedAt: { $exists: false }
});
if (exist !== null) {
return rej('already watching');
}
//#endregion
// Create Watching
await Watching.insert({
createdAt: new Date(),
userId: user._id,
channelId: channel._id
});
// Send response
res();
// Increment watching count
Channel.update(channel._id, {
$inc: {
watchingCount: 1
}
});
});
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