overleaf/services/web/scripts/back_fill_dummy_doc_meta.js

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const { promisify } = require('util')
const { ObjectId } = require('mongodb-legacy')
const {
db,
waitForDb,
READ_PREFERENCE_SECONDARY,
} = require('../app/src/infrastructure/mongodb')
const sleep = promisify(setTimeout)
const _ = require('lodash')
const NOW_IN_S = Date.now() / 1000
const ONE_WEEK_IN_S = 60 * 60 * 24 * 7
const TEN_SECONDS = 10 * 1000
const DUMMY_NAME = 'unknown.tex'
const DUMMY_TIME = new Date('2021-04-12T00:00:00.000Z')
const LRUCache = require('lru-cache')
let deletedProjectsCache = null
function getSecondsFromObjectId(id) {
return id.getTimestamp().getTime() / 1000
}
async function main(options) {
if (!options) {
options = {}
}
_.defaults(options, {
dryRun: process.env.DRY_RUN === 'true',
cacheSize: parseInt(process.env.CACHE_SIZE, 10) || 100,
firstProjectId: new ObjectId(process.env.FIRST_PROJECT_ID),
incrementByS: parseInt(process.env.INCREMENT_BY_S, 10) || ONE_WEEK_IN_S,
batchSize: parseInt(process.env.BATCH_SIZE, 10) || 1000,
stopAtS: parseInt(process.env.STOP_AT_S, 10) || NOW_IN_S,
letUserDoubleCheckInputsFor:
parseInt(process.env.LET_USER_DOUBLE_CHECK_INPUTS_FOR, 10) || TEN_SECONDS,
})
if (!options.firstProjectId) {
console.error('Set FIRST_PROJECT_ID and re-run.')
process.exit(1)
}
deletedProjectsCache = new LRUCache({
max: options.cacheSize,
})
await letUserDoubleCheckInputs(options)
await waitForDb()
let startId = options.firstProjectId
let nProcessed = 0
while (getSecondsFromObjectId(startId) <= options.stopAtS) {
const end = getSecondsFromObjectId(startId) + options.incrementByS
let endId = ObjectId.createFromTime(end)
const query = {
project_id: {
// include edge
$gte: startId,
// exclude edge
$lt: endId,
},
deleted: true,
name: {
$exists: false,
},
}
const docs = await db.docs
.find(query, { readPreference: READ_PREFERENCE_SECONDARY })
.project({ _id: 1, project_id: 1 })
.limit(options.batchSize)
.toArray()
if (docs.length) {
const docIds = docs.map(doc => doc._id)
console.log('Back filling dummy meta data for', JSON.stringify(docIds))
await processBatch(docs, options)
nProcessed += docIds.length
if (docs.length === options.batchSize) {
endId = docs[docs.length - 1].project_id
}
}
console.error('Processed %d until %s', nProcessed, endId)
startId = endId
}
}
async function getDeletedProject(projectId) {
const cacheKey = projectId.toString()
if (deletedProjectsCache.has(cacheKey)) {
return deletedProjectsCache.get(cacheKey)
}
const deletedProject = await db.deletedProjects.findOne(
{ 'deleterData.deletedProjectId': projectId },
{
projection: {
_id: 1,
'project.deletedDocs': 1,
},
}
)
deletedProjectsCache.set(cacheKey, deletedProject)
return deletedProject
}
async function processBatch(docs, options) {
for (const doc of docs) {
const { _id: docId, project_id: projectId } = doc
const deletedProject = await getDeletedProject(projectId)
let name = DUMMY_NAME
let deletedAt = DUMMY_TIME
if (deletedProject) {
const project = deletedProject.project
if (project) {
const deletedDoc =
project.deletedDocs &&
project.deletedDocs.find(deletedDoc => docId.equals(deletedDoc._id))
if (deletedDoc) {
console.log('Found deletedDoc for %s', docId)
name = deletedDoc.name
deletedAt = deletedDoc.deletedAt
} else {
console.log('Missing deletedDoc for %s', docId)
}
} else {
console.log('Orphaned deleted doc %s (failed hard deletion)', docId)
}
} else {
console.log('Orphaned deleted doc %s (no deletedProjects entry)', docId)
}
if (options.dryRun) continue
await db.docs.updateOne({ _id: docId }, { $set: { name, deletedAt } })
}
}
async function letUserDoubleCheckInputs(options) {
console.error('Options:', JSON.stringify(options, null, 2))
console.error(
'Waiting for you to double check inputs for',
options.letUserDoubleCheckInputsFor,
'ms'
)
await sleep(options.letUserDoubleCheckInputsFor)
}
module.exports = main
if (require.main === module) {
main()
.then(() => {
console.error('Done.')
process.exit(0)
})
.catch(error => {
console.error({ error })
process.exit(1)
})
}