mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-21 20:47:08 -05:00
417 lines
14 KiB
JavaScript
417 lines
14 KiB
JavaScript
/* eslint-disable
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camelcase,
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handle-callback-err,
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no-unused-vars,
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS201: Simplify complex destructure assignments
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* DS205: Consider reworking code to avoid use of IIFEs
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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let UpdateManager
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const LockManager = require('./LockManager')
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const RedisManager = require('./RedisManager')
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const RealTimeRedisManager = require('./RealTimeRedisManager')
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const ShareJsUpdateManager = require('./ShareJsUpdateManager')
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const HistoryManager = require('./HistoryManager')
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const Settings = require('@overleaf/settings')
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const _ = require('lodash')
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const async = require('async')
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const logger = require('logger-sharelatex')
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const Metrics = require('./Metrics')
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const Errors = require('./Errors')
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const DocumentManager = require('./DocumentManager')
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const RangesManager = require('./RangesManager')
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const SnapshotManager = require('./SnapshotManager')
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const Profiler = require('./Profiler')
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module.exports = UpdateManager = {
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processOutstandingUpdates(project_id, doc_id, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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const timer = new Metrics.Timer('updateManager.processOutstandingUpdates')
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return UpdateManager.fetchAndApplyUpdates(
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project_id,
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doc_id,
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function (error) {
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timer.done()
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if (error != null) {
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return callback(error)
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}
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return callback()
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}
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)
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},
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processOutstandingUpdatesWithLock(project_id, doc_id, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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const profile = new Profiler('processOutstandingUpdatesWithLock', {
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project_id,
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doc_id,
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})
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return LockManager.tryLock(doc_id, (error, gotLock, lockValue) => {
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if (error != null) {
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return callback(error)
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}
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if (!gotLock) {
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return callback()
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}
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profile.log('tryLock')
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return UpdateManager.processOutstandingUpdates(
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project_id,
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doc_id,
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function (error) {
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if (error != null) {
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return UpdateManager._handleErrorInsideLock(
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doc_id,
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lockValue,
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error,
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callback
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)
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}
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profile.log('processOutstandingUpdates')
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return LockManager.releaseLock(doc_id, lockValue, error => {
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if (error != null) {
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return callback(error)
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}
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profile.log('releaseLock').end()
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return UpdateManager.continueProcessingUpdatesWithLock(
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project_id,
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doc_id,
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callback
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)
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})
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}
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)
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})
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},
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continueProcessingUpdatesWithLock(project_id, doc_id, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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return RealTimeRedisManager.getUpdatesLength(doc_id, (error, length) => {
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if (error != null) {
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return callback(error)
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}
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if (length > 0) {
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return UpdateManager.processOutstandingUpdatesWithLock(
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project_id,
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doc_id,
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callback
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)
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} else {
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return callback()
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}
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})
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},
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fetchAndApplyUpdates(project_id, doc_id, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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const profile = new Profiler('fetchAndApplyUpdates', { project_id, doc_id })
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return RealTimeRedisManager.getPendingUpdatesForDoc(
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doc_id,
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(error, updates) => {
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if (error != null) {
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return callback(error)
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}
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logger.debug(
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{ project_id, doc_id, count: updates.length },
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'processing updates'
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)
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if (updates.length === 0) {
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return callback()
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}
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profile.log('getPendingUpdatesForDoc')
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const doUpdate = (update, cb) =>
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UpdateManager.applyUpdate(project_id, doc_id, update, function (err) {
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profile.log('applyUpdate')
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return cb(err)
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})
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const finalCallback = function (err) {
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profile.log('async done').end()
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return callback(err)
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}
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return async.eachSeries(updates, doUpdate, finalCallback)
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}
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)
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},
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applyUpdate(project_id, doc_id, update, _callback) {
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if (_callback == null) {
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_callback = function (error) {}
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}
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const callback = function (error) {
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if (error != null) {
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RealTimeRedisManager.sendData({
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project_id,
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doc_id,
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error: error.message || error,
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})
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profile.log('sendData')
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}
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profile.end()
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return _callback(error)
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}
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var profile = new Profiler('applyUpdate', { project_id, doc_id })
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UpdateManager._sanitizeUpdate(update)
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profile.log('sanitizeUpdate')
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return DocumentManager.getDoc(
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project_id,
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doc_id,
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function (error, lines, version, ranges, pathname, projectHistoryId) {
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profile.log('getDoc')
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if (error != null) {
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return callback(error)
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}
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if (lines == null || version == null) {
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return callback(
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new Errors.NotFoundError(`document not found: ${doc_id}`)
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)
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}
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const previousVersion = version
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return ShareJsUpdateManager.applyUpdate(
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project_id,
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doc_id,
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update,
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lines,
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version,
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function (error, updatedDocLines, version, appliedOps) {
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profile.log('sharejs.applyUpdate')
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if (error != null) {
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return callback(error)
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}
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return RangesManager.applyUpdate(
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project_id,
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doc_id,
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ranges,
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appliedOps,
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updatedDocLines,
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function (error, new_ranges, ranges_were_collapsed) {
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UpdateManager._addProjectHistoryMetadataToOps(
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appliedOps,
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pathname,
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projectHistoryId,
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lines
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)
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profile.log('RangesManager.applyUpdate')
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if (error != null) {
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return callback(error)
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}
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return RedisManager.updateDocument(
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project_id,
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doc_id,
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updatedDocLines,
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version,
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appliedOps,
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new_ranges,
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update.meta,
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function (error, doc_ops_length, project_ops_length) {
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profile.log('RedisManager.updateDocument')
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if (error != null) {
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return callback(error)
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}
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return HistoryManager.recordAndFlushHistoryOps(
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project_id,
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doc_id,
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appliedOps,
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doc_ops_length,
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project_ops_length,
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function (error) {
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profile.log('recordAndFlushHistoryOps')
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if (error != null) {
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return callback(error)
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}
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if (ranges_were_collapsed) {
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logger.debug(
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{
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project_id,
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doc_id,
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previousVersion,
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lines,
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ranges,
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update,
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},
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'update collapsed some ranges, snapshotting previous content'
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)
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// Do this last, since it's a mongo call, and so potentially longest running
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// If it overruns the lock, it's ok, since all of our redis work is done
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return SnapshotManager.recordSnapshot(
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project_id,
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doc_id,
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previousVersion,
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pathname,
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lines,
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ranges,
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function (error) {
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if (error != null) {
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logger.error(
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{
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err: error,
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project_id,
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doc_id,
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version,
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lines,
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ranges,
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},
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'error recording snapshot'
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)
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return callback(error)
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} else {
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return callback()
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}
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}
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)
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} else {
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return callback()
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}
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}
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)
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}
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)
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}
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)
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}
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)
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}
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)
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},
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lockUpdatesAndDo(method, project_id, doc_id, ...rest) {
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const adjustedLength = Math.max(rest.length, 1)
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const args = rest.slice(0, adjustedLength - 1)
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const callback = rest[adjustedLength - 1]
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const profile = new Profiler('lockUpdatesAndDo', { project_id, doc_id })
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return LockManager.getLock(doc_id, function (error, lockValue) {
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profile.log('getLock')
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if (error != null) {
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return callback(error)
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}
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return UpdateManager.processOutstandingUpdates(
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project_id,
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doc_id,
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function (error) {
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if (error != null) {
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return UpdateManager._handleErrorInsideLock(
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doc_id,
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lockValue,
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error,
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callback
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)
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}
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profile.log('processOutstandingUpdates')
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return method(
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project_id,
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doc_id,
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...Array.from(args),
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function (error, ...response_args) {
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if (error != null) {
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return UpdateManager._handleErrorInsideLock(
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doc_id,
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lockValue,
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error,
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callback
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)
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}
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profile.log('method')
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return LockManager.releaseLock(
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doc_id,
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lockValue,
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function (error) {
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if (error != null) {
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return callback(error)
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}
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profile.log('releaseLock').end()
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callback(null, ...Array.from(response_args))
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// We held the lock for a while so updates might have queued up
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return UpdateManager.continueProcessingUpdatesWithLock(
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project_id,
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doc_id
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)
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}
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)
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}
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)
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}
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)
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})
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},
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_handleErrorInsideLock(doc_id, lockValue, original_error, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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return LockManager.releaseLock(doc_id, lockValue, lock_error =>
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callback(original_error)
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)
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},
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_sanitizeUpdate(update) {
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// In Javascript, characters are 16-bits wide. It does not understand surrogates as characters.
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//
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// From Wikipedia (http://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane):
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// "The High Surrogates (U+D800–U+DBFF) and Low Surrogate (U+DC00–U+DFFF) codes are reserved
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// for encoding non-BMP characters in UTF-16 by using a pair of 16-bit codes: one High Surrogate
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// and one Low Surrogate. A single surrogate code point will never be assigned a character.""
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//
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// The main offender seems to be \uD835 as a stand alone character, which would be the first
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// 16-bit character of a blackboard bold character (http://www.fileformat.info/info/unicode/char/1d400/index.htm).
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// Something must be going on client side that is screwing up the encoding and splitting the
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// two 16-bit characters so that \uD835 is standalone.
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for (const op of Array.from(update.op || [])) {
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if (op.i != null) {
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// Replace high and low surrogate characters with 'replacement character' (\uFFFD)
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op.i = op.i.replace(/[\uD800-\uDFFF]/g, '\uFFFD')
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}
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}
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return update
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},
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_addProjectHistoryMetadataToOps(updates, pathname, projectHistoryId, lines) {
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let doc_length = _.reduce(lines, (chars, line) => chars + line.length, 0)
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doc_length += lines.length - 1 // count newline characters
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return updates.forEach(function (update) {
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update.projectHistoryId = projectHistoryId
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if (!update.meta) {
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update.meta = {}
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}
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update.meta.pathname = pathname
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update.meta.doc_length = doc_length
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// Each update may contain multiple ops, i.e.
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// [{
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// ops: [{i: "foo", p: 4}, {d: "bar", p:8}]
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// }, {
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// ops: [{d: "baz", p: 40}, {i: "qux", p:8}]
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// }]
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// We want to include the doc_length at the start of each update,
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// before it's ops are applied. However, we need to track any
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// changes to it for the next update.
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return (() => {
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const result = []
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for (const op of Array.from(update.op)) {
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if (op.i != null) {
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doc_length += op.i.length
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}
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if (op.d != null) {
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result.push((doc_length -= op.d.length))
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} else {
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result.push(undefined)
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}
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}
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return result
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})()
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})
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},
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}
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