mirror of
https://github.com/overleaf/overleaf.git
synced 2024-09-16 02:52:31 -04:00
412 lines
13 KiB
JavaScript
412 lines
13 KiB
JavaScript
/* eslint-disable
|
||
camelcase,
|
||
handle-callback-err,
|
||
no-unused-vars,
|
||
*/
|
||
// TODO: This file was created by bulk-decaffeinate.
|
||
// Fix any style issues and re-enable lint.
|
||
/*
|
||
* decaffeinate suggestions:
|
||
* DS101: Remove unnecessary use of Array.from
|
||
* DS102: Remove unnecessary code created because of implicit returns
|
||
* DS201: Simplify complex destructure assignments
|
||
* DS205: Consider reworking code to avoid use of IIFEs
|
||
* DS207: Consider shorter variations of null checks
|
||
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
|
||
*/
|
||
let UpdateManager
|
||
const LockManager = require('./LockManager')
|
||
const RedisManager = require('./RedisManager')
|
||
const RealTimeRedisManager = require('./RealTimeRedisManager')
|
||
const ShareJsUpdateManager = require('./ShareJsUpdateManager')
|
||
const HistoryManager = require('./HistoryManager')
|
||
const Settings = require('settings-sharelatex')
|
||
const _ = require('lodash')
|
||
const async = require('async')
|
||
const logger = require('logger-sharelatex')
|
||
const Metrics = require('./Metrics')
|
||
const Errors = require('./Errors')
|
||
const DocumentManager = require('./DocumentManager')
|
||
const RangesManager = require('./RangesManager')
|
||
const SnapshotManager = require('./SnapshotManager')
|
||
const Profiler = require('./Profiler')
|
||
|
||
module.exports = UpdateManager = {
|
||
processOutstandingUpdates(project_id, doc_id, callback) {
|
||
if (callback == null) {
|
||
callback = function (error) {}
|
||
}
|
||
const timer = new Metrics.Timer('updateManager.processOutstandingUpdates')
|
||
return UpdateManager.fetchAndApplyUpdates(project_id, doc_id, function (
|
||
error
|
||
) {
|
||
timer.done()
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
return callback()
|
||
})
|
||
},
|
||
|
||
processOutstandingUpdatesWithLock(project_id, doc_id, callback) {
|
||
if (callback == null) {
|
||
callback = function (error) {}
|
||
}
|
||
const profile = new Profiler('processOutstandingUpdatesWithLock', {
|
||
project_id,
|
||
doc_id
|
||
})
|
||
return LockManager.tryLock(doc_id, (error, gotLock, lockValue) => {
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
if (!gotLock) {
|
||
return callback()
|
||
}
|
||
profile.log('tryLock')
|
||
return UpdateManager.processOutstandingUpdates(
|
||
project_id,
|
||
doc_id,
|
||
function (error) {
|
||
if (error != null) {
|
||
return UpdateManager._handleErrorInsideLock(
|
||
doc_id,
|
||
lockValue,
|
||
error,
|
||
callback
|
||
)
|
||
}
|
||
profile.log('processOutstandingUpdates')
|
||
return LockManager.releaseLock(doc_id, lockValue, (error) => {
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
profile.log('releaseLock').end()
|
||
return UpdateManager.continueProcessingUpdatesWithLock(
|
||
project_id,
|
||
doc_id,
|
||
callback
|
||
)
|
||
})
|
||
}
|
||
)
|
||
})
|
||
},
|
||
|
||
continueProcessingUpdatesWithLock(project_id, doc_id, callback) {
|
||
if (callback == null) {
|
||
callback = function (error) {}
|
||
}
|
||
return RealTimeRedisManager.getUpdatesLength(doc_id, (error, length) => {
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
if (length > 0) {
|
||
return UpdateManager.processOutstandingUpdatesWithLock(
|
||
project_id,
|
||
doc_id,
|
||
callback
|
||
)
|
||
} else {
|
||
return callback()
|
||
}
|
||
})
|
||
},
|
||
|
||
fetchAndApplyUpdates(project_id, doc_id, callback) {
|
||
if (callback == null) {
|
||
callback = function (error) {}
|
||
}
|
||
const profile = new Profiler('fetchAndApplyUpdates', { project_id, doc_id })
|
||
return RealTimeRedisManager.getPendingUpdatesForDoc(
|
||
doc_id,
|
||
(error, updates) => {
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
logger.log(
|
||
{ project_id, doc_id, count: updates.length },
|
||
'processing updates'
|
||
)
|
||
if (updates.length === 0) {
|
||
return callback()
|
||
}
|
||
profile.log('getPendingUpdatesForDoc')
|
||
const doUpdate = (update, cb) =>
|
||
UpdateManager.applyUpdate(project_id, doc_id, update, function (err) {
|
||
profile.log('applyUpdate')
|
||
return cb(err)
|
||
})
|
||
const finalCallback = function (err) {
|
||
profile.log('async done').end()
|
||
return callback(err)
|
||
}
|
||
return async.eachSeries(updates, doUpdate, finalCallback)
|
||
}
|
||
)
|
||
},
|
||
|
||
applyUpdate(project_id, doc_id, update, _callback) {
|
||
if (_callback == null) {
|
||
_callback = function (error) {}
|
||
}
|
||
const callback = function (error) {
|
||
if (error != null) {
|
||
RealTimeRedisManager.sendData({
|
||
project_id,
|
||
doc_id,
|
||
error: error.message || error
|
||
})
|
||
profile.log('sendData')
|
||
}
|
||
profile.end()
|
||
return _callback(error)
|
||
}
|
||
|
||
var profile = new Profiler('applyUpdate', { project_id, doc_id })
|
||
UpdateManager._sanitizeUpdate(update)
|
||
profile.log('sanitizeUpdate')
|
||
return DocumentManager.getDoc(project_id, doc_id, function (
|
||
error,
|
||
lines,
|
||
version,
|
||
ranges,
|
||
pathname,
|
||
projectHistoryId
|
||
) {
|
||
profile.log('getDoc')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
if (lines == null || version == null) {
|
||
return callback(
|
||
new Errors.NotFoundError(`document not found: ${doc_id}`)
|
||
)
|
||
}
|
||
const previousVersion = version
|
||
return ShareJsUpdateManager.applyUpdate(
|
||
project_id,
|
||
doc_id,
|
||
update,
|
||
lines,
|
||
version,
|
||
function (error, updatedDocLines, version, appliedOps) {
|
||
profile.log('sharejs.applyUpdate')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
return RangesManager.applyUpdate(
|
||
project_id,
|
||
doc_id,
|
||
ranges,
|
||
appliedOps,
|
||
updatedDocLines,
|
||
function (error, new_ranges, ranges_were_collapsed) {
|
||
UpdateManager._addProjectHistoryMetadataToOps(
|
||
appliedOps,
|
||
pathname,
|
||
projectHistoryId,
|
||
lines
|
||
)
|
||
profile.log('RangesManager.applyUpdate')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
return RedisManager.updateDocument(
|
||
project_id,
|
||
doc_id,
|
||
updatedDocLines,
|
||
version,
|
||
appliedOps,
|
||
new_ranges,
|
||
update.meta,
|
||
function (error, doc_ops_length, project_ops_length) {
|
||
profile.log('RedisManager.updateDocument')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
return HistoryManager.recordAndFlushHistoryOps(
|
||
project_id,
|
||
doc_id,
|
||
appliedOps,
|
||
doc_ops_length,
|
||
project_ops_length,
|
||
function (error) {
|
||
profile.log('recordAndFlushHistoryOps')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
if (ranges_were_collapsed) {
|
||
logger.log(
|
||
{
|
||
project_id,
|
||
doc_id,
|
||
previousVersion,
|
||
lines,
|
||
ranges,
|
||
update
|
||
},
|
||
'update collapsed some ranges, snapshotting previous content'
|
||
)
|
||
// Do this last, since it's a mongo call, and so potentially longest running
|
||
// If it overruns the lock, it's ok, since all of our redis work is done
|
||
return SnapshotManager.recordSnapshot(
|
||
project_id,
|
||
doc_id,
|
||
previousVersion,
|
||
pathname,
|
||
lines,
|
||
ranges,
|
||
function (error) {
|
||
if (error != null) {
|
||
logger.error(
|
||
{
|
||
err: error,
|
||
project_id,
|
||
doc_id,
|
||
version,
|
||
lines,
|
||
ranges
|
||
},
|
||
'error recording snapshot'
|
||
)
|
||
return callback(error)
|
||
} else {
|
||
return callback()
|
||
}
|
||
}
|
||
)
|
||
} else {
|
||
return callback()
|
||
}
|
||
}
|
||
)
|
||
}
|
||
)
|
||
}
|
||
)
|
||
}
|
||
)
|
||
})
|
||
},
|
||
|
||
lockUpdatesAndDo(method, project_id, doc_id, ...rest) {
|
||
const adjustedLength = Math.max(rest.length, 1)
|
||
const args = rest.slice(0, adjustedLength - 1)
|
||
const callback = rest[adjustedLength - 1]
|
||
const profile = new Profiler('lockUpdatesAndDo', { project_id, doc_id })
|
||
return LockManager.getLock(doc_id, function (error, lockValue) {
|
||
profile.log('getLock')
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
return UpdateManager.processOutstandingUpdates(
|
||
project_id,
|
||
doc_id,
|
||
function (error) {
|
||
if (error != null) {
|
||
return UpdateManager._handleErrorInsideLock(
|
||
doc_id,
|
||
lockValue,
|
||
error,
|
||
callback
|
||
)
|
||
}
|
||
profile.log('processOutstandingUpdates')
|
||
return method(project_id, doc_id, ...Array.from(args), function (
|
||
error,
|
||
...response_args
|
||
) {
|
||
if (error != null) {
|
||
return UpdateManager._handleErrorInsideLock(
|
||
doc_id,
|
||
lockValue,
|
||
error,
|
||
callback
|
||
)
|
||
}
|
||
profile.log('method')
|
||
return LockManager.releaseLock(doc_id, lockValue, function (error) {
|
||
if (error != null) {
|
||
return callback(error)
|
||
}
|
||
profile.log('releaseLock').end()
|
||
callback(null, ...Array.from(response_args))
|
||
// We held the lock for a while so updates might have queued up
|
||
return UpdateManager.continueProcessingUpdatesWithLock(
|
||
project_id,
|
||
doc_id
|
||
)
|
||
})
|
||
})
|
||
}
|
||
)
|
||
})
|
||
},
|
||
|
||
_handleErrorInsideLock(doc_id, lockValue, original_error, callback) {
|
||
if (callback == null) {
|
||
callback = function (error) {}
|
||
}
|
||
return LockManager.releaseLock(doc_id, lockValue, (lock_error) =>
|
||
callback(original_error)
|
||
)
|
||
},
|
||
|
||
_sanitizeUpdate(update) {
|
||
// In Javascript, characters are 16-bits wide. It does not understand surrogates as characters.
|
||
//
|
||
// From Wikipedia (http://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane):
|
||
// "The High Surrogates (U+D800–U+DBFF) and Low Surrogate (U+DC00–U+DFFF) codes are reserved
|
||
// for encoding non-BMP characters in UTF-16 by using a pair of 16-bit codes: one High Surrogate
|
||
// and one Low Surrogate. A single surrogate code point will never be assigned a character.""
|
||
//
|
||
// The main offender seems to be \uD835 as a stand alone character, which would be the first
|
||
// 16-bit character of a blackboard bold character (http://www.fileformat.info/info/unicode/char/1d400/index.htm).
|
||
// Something must be going on client side that is screwing up the encoding and splitting the
|
||
// two 16-bit characters so that \uD835 is standalone.
|
||
for (const op of Array.from(update.op || [])) {
|
||
if (op.i != null) {
|
||
// Replace high and low surrogate characters with 'replacement character' (\uFFFD)
|
||
op.i = op.i.replace(/[\uD800-\uDFFF]/g, '\uFFFD')
|
||
}
|
||
}
|
||
return update
|
||
},
|
||
|
||
_addProjectHistoryMetadataToOps(updates, pathname, projectHistoryId, lines) {
|
||
let doc_length = _.reduce(lines, (chars, line) => chars + line.length, 0)
|
||
doc_length += lines.length - 1 // count newline characters
|
||
return updates.forEach(function (update) {
|
||
update.projectHistoryId = projectHistoryId
|
||
if (!update.meta) {
|
||
update.meta = {}
|
||
}
|
||
update.meta.pathname = pathname
|
||
update.meta.doc_length = doc_length
|
||
// Each update may contain multiple ops, i.e.
|
||
// [{
|
||
// ops: [{i: "foo", p: 4}, {d: "bar", p:8}]
|
||
// }, {
|
||
// ops: [{d: "baz", p: 40}, {i: "qux", p:8}]
|
||
// }]
|
||
// We want to include the doc_length at the start of each update,
|
||
// before it's ops are applied. However, we need to track any
|
||
// changes to it for the next update.
|
||
return (() => {
|
||
const result = []
|
||
for (const op of Array.from(update.op)) {
|
||
if (op.i != null) {
|
||
doc_length += op.i.length
|
||
}
|
||
if (op.d != null) {
|
||
result.push((doc_length -= op.d.length))
|
||
} else {
|
||
result.push(undefined)
|
||
}
|
||
}
|
||
return result
|
||
})()
|
||
})
|
||
}
|
||
}
|