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44 lines
2.2 KiB
CoffeeScript
44 lines
2.2 KiB
CoffeeScript
settings = require "settings-sharelatex"
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request = require "request"
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logger = require "logger-sharelatex"
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HistoryRedisManager = require "./HistoryRedisManager"
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module.exports = HistoryManager =
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flushDocChanges: (project_id, doc_id, callback = (error) ->) ->
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if !settings.apis?.trackchanges?
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logger.warn doc_id: doc_id, "track changes API is not configured, so not flushing"
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return callback()
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url = "#{settings.apis.trackchanges.url}/project/#{project_id}/doc/#{doc_id}/flush"
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logger.log project_id: project_id, doc_id: doc_id, url: url, "flushing doc in track changes api"
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request.post url, (error, res, body)->
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if error?
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return callback(error)
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else if res.statusCode >= 200 and res.statusCode < 300
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return callback(null)
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else
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error = new Error("track changes api returned a failure status code: #{res.statusCode}")
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return callback(error)
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FLUSH_EVERY_N_OPS: 100
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recordAndFlushHistoryOps: (project_id, doc_id, ops = [], length, callback = (error) ->) ->
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if ops.length == 0
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return callback()
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HistoryRedisManager.recordDocHasHistoryOps project_id, doc_id, ops, (error) ->
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return callback(error) if error?
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return callback() if not length? # don't flush unless we know the length
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# We want to flush every 100 ops, i.e. 100, 200, 300, etc
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# Find out which 'block' (i.e. 0-99, 100-199) we were in before and after pushing these
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# ops. If we've changed, then we've gone over a multiple of 100 and should flush.
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# (Most of the time, we will only hit 100 and then flushing will put us back to 0)
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previousLength = length - ops.length
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prevBlock = Math.floor(previousLength / HistoryManager.FLUSH_EVERY_N_OPS)
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newBlock = Math.floor(length / HistoryManager.FLUSH_EVERY_N_OPS)
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if newBlock != prevBlock
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# Do this in the background since it uses HTTP and so may be too
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# slow to wait for when processing a doc update.
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logger.log length: length, doc_id: doc_id, project_id: project_id, "flushing track changes api"
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HistoryManager.flushDocChanges project_id, doc_id, (error) ->
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if error?
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logger.error err: error, doc_id: doc_id, project_id: project_id, "error flushing doc to track changes api"
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callback()
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