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