overleaf/services/document-updater/app/coffee/RangesManager.coffee

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CoffeeScript
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RangesTracker = require "./RangesTracker"
logger = require "logger-sharelatex"
module.exports = RangesManager =
applyUpdate: (project_id, doc_id, entries = {}, updates = [], callback = (error, new_entries) ->) ->
{changes, comments} = entries
logger.log {changes, comments, updates}, "appliyng updates to ranges"
rangesTracker = new RangesTracker(changes, comments)
for update in updates
rangesTracker.track_changes = !!update.meta.tc
for op in update.op
rangesTracker.applyOp(op, { user_id: update.meta?.user_id })
# Return the minimal data structure needed, since most documents won't have any
# changes or comments
response = {}
if rangesTracker.changes?.length > 0
response ?= {}
response.changes = rangesTracker.changes
if rangesTracker.comments?.length > 0
response ?= {}
response.comments = rangesTracker.comments
logger.log {response}, "applied updates to ranges"
callback null, response