mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-07 20:31:06 -05:00
49 lines
1.8 KiB
CoffeeScript
49 lines
1.8 KiB
CoffeeScript
Settings = require "settings-sharelatex"
|
|
RedisWrapper = require("../../infrastructure/RedisWrapper")
|
|
rclient = RedisWrapper.client("clsi_state")
|
|
logger = require "logger-sharelatex"
|
|
crypto = require "crypto"
|
|
|
|
buildKey = (project_id)->
|
|
return "clsistate:#{project_id}" # FIXME: should we cluster these on project??
|
|
|
|
# The "state" of a project is a hash of the relevant attributes in the
|
|
# project object in this case we only need the rootFolder.
|
|
#
|
|
# The idea is that it will change if any doc or file is
|
|
# created/renamed/deleted, and also if the content of any file (not
|
|
# doc) changes.
|
|
#
|
|
# When the hash changes the full set of files on the CLSI will need to
|
|
# be updated. If it doesn't change then we can overwrite changed docs
|
|
# in place on the clsi, getting them from the docupdater.
|
|
#
|
|
# The docupdater is also responsible for unsetting the key in redis if
|
|
# it removes any documents from the doc updater.
|
|
|
|
buildState = (project) ->
|
|
json = JSON.stringify(project.rootFolder)
|
|
return crypto.createHash('sha1').update(json, 'utf8').digest('hex')
|
|
|
|
clsiStateEnabled = Settings.clsiState
|
|
|
|
OneHour = 3600 * 1000
|
|
|
|
module.exports = ClsiStateManager =
|
|
|
|
checkProjectStateMatch: (project_id, project, callback = (err, ok) ->) ->
|
|
newState = buildState(project)
|
|
rclient.get buildKey(project_id), (err, oldState) ->
|
|
return callback(err) if err?
|
|
logger.log project_id: project_id, new_state: newState, old_state: oldState, "got project state from redis"
|
|
if newState is oldState
|
|
callback(null,true,oldState)
|
|
else
|
|
callback(null,false)
|
|
|
|
setProjectState: (project_id, project, callback = (err)->)->
|
|
projectState = buildState(project)
|
|
logger.log project_id: project_id, projectState: projectState, "setting project state in redis"
|
|
rclient.set buildKey(project_id), projectState, "PX", OneHour, (err) ->
|
|
return callback(err) if err?
|
|
callback(null,projectState)
|