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31 lines
1.3 KiB
CoffeeScript
31 lines
1.3 KiB
CoffeeScript
Settings = require "settings-sharelatex"
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logger = require "logger-sharelatex"
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crypto = require "crypto"
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ProjectEntityHandler = require "../Project/ProjectEntityHandler"
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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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# The idea is that it will change if any doc or file is
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# created/renamed/deleted, and also if the content of any file (not
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# doc) changes.
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#
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# When the hash changes the full set of files on the CLSI will need to
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# be updated. If it doesn't change then we can overwrite changed docs
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# in place on the clsi, getting them from the docupdater.
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#
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# The docupdater is responsible for setting the key in redis, and
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# unsetting it if it removes any documents from the doc updater.
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buildState = (s) ->
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return crypto.createHash('sha1').update(s, 'utf8').digest('hex')
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module.exports = ClsiStateManager =
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computeHash: (project, callback = (err, hash) ->) ->
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ProjectEntityHandler.getAllEntitiesFromProject project, (err, docs, files) ->
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fileList = ("#{f.file._id}:#{f.file.rev}:#{f.file.created}:#{f.path}" for f in files or [])
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docList = ("#{d.doc._id}:#{d.path}" for d in docs or [])
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sortedEntityList = [docList..., fileList...].sort()
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hash = buildState(sortedEntityList.join("\n"))
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callback(null, hash)
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