overleaf/services/document-updater/app/js/ProjectManager.js

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const RedisManager = require('./RedisManager')
const ProjectHistoryRedisManager = require('./ProjectHistoryRedisManager')
const DocumentManager = require('./DocumentManager')
const HistoryManager = require('./HistoryManager')
const async = require('async')
const logger = require('logger-sharelatex')
const Metrics = require('./Metrics')
const Errors = require('./Errors')
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module.exports = {
flushProjectWithLocks,
flushAndDeleteProjectWithLocks,
queueFlushAndDeleteProject,
getProjectDocsTimestamps,
getProjectDocsAndFlushIfOld,
clearProjectState,
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updateProjectWithLocks,
}
function flushProjectWithLocks(projectId, _callback) {
const timer = new Metrics.Timer('projectManager.flushProjectWithLocks')
const callback = function (...args) {
timer.done()
_callback(...args)
}
RedisManager.getDocIdsInProject(projectId, (error, docIds) => {
if (error) {
return callback(error)
}
const errors = []
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const jobs = docIds.map(docId => callback => {
DocumentManager.flushDocIfLoadedWithLock(projectId, docId, error => {
if (error instanceof Errors.NotFoundError) {
logger.warn(
{ err: error, projectId, docId },
'found deleted doc when flushing'
)
callback()
} else if (error) {
logger.error({ err: error, projectId, docId }, 'error flushing doc')
errors.push(error)
callback()
} else {
callback()
}
})
})
logger.log({ projectId, docIds }, 'flushing docs')
async.series(jobs, () => {
if (errors.length > 0) {
callback(new Error('Errors flushing docs. See log for details'))
} else {
callback(null)
}
})
})
}
function flushAndDeleteProjectWithLocks(projectId, options, _callback) {
const timer = new Metrics.Timer(
'projectManager.flushAndDeleteProjectWithLocks'
)
const callback = function (...args) {
timer.done()
_callback(...args)
}
RedisManager.getDocIdsInProject(projectId, (error, docIds) => {
if (error) {
return callback(error)
}
const errors = []
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const jobs = docIds.map(docId => callback => {
DocumentManager.flushAndDeleteDocWithLock(projectId, docId, {}, error => {
if (error) {
logger.error({ err: error, projectId, docId }, 'error deleting doc')
errors.push(error)
}
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callback()
})
})
logger.log({ projectId, docIds }, 'deleting docs')
async.series(jobs, () =>
// When deleting the project here we want to ensure that project
// history is completely flushed because the project may be
// deleted in web after this call completes, and so further
// attempts to flush would fail after that.
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HistoryManager.flushProjectChanges(projectId, options, error => {
if (errors.length > 0) {
callback(new Error('Errors deleting docs. See log for details'))
} else if (error) {
callback(error)
} else {
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callback(null)
}
})
)
})
}
function queueFlushAndDeleteProject(projectId, callback) {
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RedisManager.queueFlushAndDeleteProject(projectId, error => {
if (error) {
logger.error(
{ projectId, error },
'error adding project to flush and delete queue'
)
return callback(error)
}
Metrics.inc('queued-delete')
callback()
})
}
function getProjectDocsTimestamps(projectId, callback) {
RedisManager.getDocIdsInProject(projectId, (error, docIds) => {
if (error) {
return callback(error)
}
if (docIds.length === 0) {
return callback(null, [])
}
RedisManager.getDocTimestamps(docIds, (error, timestamps) => {
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if (error) {
return callback(error)
}
callback(null, timestamps)
})
})
}
function getProjectDocsAndFlushIfOld(
projectId,
projectStateHash,
excludeVersions,
_callback
) {
const timer = new Metrics.Timer('projectManager.getProjectDocsAndFlushIfOld')
const callback = function (...args) {
timer.done()
_callback(...args)
}
RedisManager.checkOrSetProjectState(
projectId,
projectStateHash,
(error, projectStateChanged) => {
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if (error) {
logger.error(
{ err: error, projectId },
'error getting/setting project state in getProjectDocsAndFlushIfOld'
)
return callback(error)
}
// we can't return docs if project structure has changed
if (projectStateChanged) {
return callback(
Errors.ProjectStateChangedError('project state changed')
)
}
// project structure hasn't changed, return doc content from redis
RedisManager.getDocIdsInProject(projectId, (error, docIds) => {
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if (error) {
logger.error(
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{ err: error, projectId },
'error getting doc ids in getProjectDocs'
)
return callback(error)
}
// get the doc lines from redis
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const jobs = docIds.map(docId => cb => {
DocumentManager.getDocAndFlushIfOldWithLock(
projectId,
docId,
(err, lines, version) => {
if (err) {
logger.error(
{ err, projectId, docId },
'error getting project doc lines in getProjectDocsAndFlushIfOld'
)
return cb(err)
}
const doc = { _id: docId, lines, v: version } // create a doc object to return
cb(null, doc)
}
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)
})
async.series(jobs, (error, docs) => {
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if (error) {
return callback(error)
}
callback(null, docs)
})
})
}
)
}
function clearProjectState(projectId, callback) {
RedisManager.clearProjectState(projectId, callback)
}
function updateProjectWithLocks(
projectId,
projectHistoryId,
userId,
updates,
projectVersion,
_callback
) {
const timer = new Metrics.Timer('projectManager.updateProject')
const callback = function (...args) {
timer.done()
_callback(...args)
}
let projectSubversion = 0 // project versions can have multiple operations
let projectOpsLength = 0
function handleUpdate(update, cb) {
update.version = `${projectVersion}.${projectSubversion++}`
switch (update.type) {
case 'add-doc':
ProjectHistoryRedisManager.queueAddEntity(
projectId,
projectHistoryId,
'doc',
update.id,
userId,
update,
(error, count) => {
projectOpsLength = count
cb(error)
}
)
break
case 'rename-doc':
DocumentManager.renameDocWithLock(
projectId,
update.id,
userId,
update,
projectHistoryId,
(error, count) => {
projectOpsLength = count
cb(error)
}
)
break
case 'add-file':
ProjectHistoryRedisManager.queueAddEntity(
projectId,
projectHistoryId,
'file',
update.id,
userId,
update,
(error, count) => {
projectOpsLength = count
cb(error)
}
)
break
case 'rename-file':
ProjectHistoryRedisManager.queueRenameEntity(
projectId,
projectHistoryId,
'file',
update.id,
userId,
update,
(error, count) => {
projectOpsLength = count
cb(error)
}
)
break
default:
cb(new Error(`Unknown update type: ${update.type}`))
}
}
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async.eachSeries(updates, handleUpdate, error => {
if (error) {
return callback(error)
}
if (
HistoryManager.shouldFlushHistoryOps(
projectOpsLength,
updates.length,
HistoryManager.FLUSH_PROJECT_EVERY_N_OPS
)
) {
HistoryManager.flushProjectChangesAsync(projectId)
}
callback()
})
}