mirror of
https://github.com/overleaf/overleaf.git
synced 2024-10-31 21:21:03 -04:00
106 lines
5.2 KiB
CoffeeScript
106 lines
5.2 KiB
CoffeeScript
LockManager = require "./LockManager"
|
||
RedisManager = require "./RedisManager"
|
||
RealTimeRedisManager = require "./RealTimeRedisManager"
|
||
ShareJsUpdateManager = require "./ShareJsUpdateManager"
|
||
HistoryManager = require "./HistoryManager"
|
||
Settings = require('settings-sharelatex')
|
||
async = require("async")
|
||
logger = require('logger-sharelatex')
|
||
Metrics = require "./Metrics"
|
||
Errors = require "./Errors"
|
||
DocumentManager = require "./DocumentManager"
|
||
RangesManager = require "./RangesManager"
|
||
|
||
module.exports = UpdateManager =
|
||
processOutstandingUpdates: (project_id, doc_id, callback = (error) ->) ->
|
||
timer = new Metrics.Timer("updateManager.processOutstandingUpdates")
|
||
DocumentManager.ensureDocIsLoaded project_id, doc_id, (error) ->
|
||
# an error at this point is safe, because we haven't consumed any ops yet
|
||
return callback(error) if error?
|
||
UpdateManager.fetchAndApplyUpdates project_id, doc_id, (error) ->
|
||
timer.done()
|
||
# now we have taken ops off the queue so errors here will cause data loss
|
||
return callback(error) if error?
|
||
callback()
|
||
|
||
processOutstandingUpdatesWithLock: (project_id, doc_id, callback = (error) ->) ->
|
||
LockManager.tryLock doc_id, (error, gotLock, lockValue) =>
|
||
return callback(error) if error?
|
||
return callback() if !gotLock
|
||
UpdateManager.processOutstandingUpdates project_id, doc_id, (error) ->
|
||
return UpdateManager._handleErrorInsideLock(doc_id, lockValue, error, callback) if error?
|
||
LockManager.releaseLock doc_id, lockValue, (error) =>
|
||
return callback(error) if error?
|
||
UpdateManager.continueProcessingUpdatesWithLock project_id, doc_id, callback
|
||
|
||
continueProcessingUpdatesWithLock: (project_id, doc_id, callback = (error) ->) ->
|
||
RealTimeRedisManager.getUpdatesLength doc_id, (error, length) =>
|
||
return callback(error) if error?
|
||
if length > 0
|
||
UpdateManager.processOutstandingUpdatesWithLock project_id, doc_id, callback
|
||
else
|
||
callback()
|
||
|
||
fetchAndApplyUpdates: (project_id, doc_id, callback = (error) ->) ->
|
||
RealTimeRedisManager.getPendingUpdatesForDoc doc_id, (error, updates) =>
|
||
return callback(error) if error?
|
||
if updates.length == 0
|
||
return callback()
|
||
async.eachSeries updates,
|
||
(update, cb) -> UpdateManager.applyUpdate project_id, doc_id, update, cb
|
||
callback
|
||
|
||
applyUpdate: (project_id, doc_id, update, _callback = (error) ->) ->
|
||
callback = (error) ->
|
||
if error?
|
||
RealTimeRedisManager.sendData {project_id, doc_id, error: error.message || error}
|
||
_callback(error)
|
||
|
||
UpdateManager._sanitizeUpdate update
|
||
DocumentManager.getDoc project_id, doc_id, (error, lines, version, ranges) ->
|
||
return callback(error) if error?
|
||
if !lines? or !version?
|
||
return callback(new Errors.NotFoundError("document not found: #{doc_id}"))
|
||
ShareJsUpdateManager.applyUpdate project_id, doc_id, update, lines, version, (error, updatedDocLines, version, appliedOps) ->
|
||
return callback(error) if error?
|
||
RangesManager.applyUpdate project_id, doc_id, ranges, appliedOps, updatedDocLines, (error, new_ranges) ->
|
||
return callback(error) if error?
|
||
RedisManager.updateDocument doc_id, updatedDocLines, version, appliedOps, new_ranges, (error, historyOpsLength) ->
|
||
return callback(error) if error?
|
||
HistoryManager.recordAndFlushHistoryOps project_id, doc_id, appliedOps, historyOpsLength, callback
|
||
|
||
lockUpdatesAndDo: (method, project_id, doc_id, args..., callback) ->
|
||
LockManager.getLock doc_id, (error, lockValue) ->
|
||
return callback(error) if error?
|
||
UpdateManager.processOutstandingUpdates project_id, doc_id, (error) ->
|
||
return UpdateManager._handleErrorInsideLock(doc_id, lockValue, error, callback) if error?
|
||
method project_id, doc_id, args..., (error, response_args...) ->
|
||
return UpdateManager._handleErrorInsideLock(doc_id, lockValue, error, callback) if error?
|
||
LockManager.releaseLock doc_id, lockValue, (error) ->
|
||
return callback(error) if error?
|
||
callback null, response_args...
|
||
# We held the lock for a while so updates might have queued up
|
||
UpdateManager.continueProcessingUpdatesWithLock project_id, doc_id
|
||
|
||
_handleErrorInsideLock: (doc_id, lockValue, original_error, callback = (error) ->) ->
|
||
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 op in update.op or []
|
||
if op.i?
|
||
# Replace high and low surrogate characters with 'replacement character' (\uFFFD)
|
||
op.i = op.i.replace(/[\uD800-\uDFFF]/g, "\uFFFD")
|
||
return update
|
||
|