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import { MongoClient } from 'mongodb';

import assert from 'assert';

import config from './config';

MongoClient.connect(config.mongodbUri, (err, db) => {

assert.equal(null, err);

let contestCount = 0;

db.collection('contests').find({}).each((err, contest) => {

assert.equal(null, err);

if (!contest) { return; }

contestCount++;

db.collection('names')

.find({ id: { $in: contest.nameIds }})

.project({ _id: 1 })

.toArray()

.then(_ids => {

const newIds = _ids.map(o => o._id);

db.collection('contests').updateOne(

{ id: contest.id },

{ $set: { nameIds: newIds } }

).then(() => {

console.info('Updated', contest._id);

contestCount--;

if (contestCount === 0) { db.close(); }

});

})

.catch(console.error);

});

});