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

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Settings = require('settings-sharelatex')
rclient = require("redis-sharelatex").createClient(Settings.redis.history)
Keys = Settings.redis.history.key_schema
logger = require('logger-sharelatex')
module.exports = HistoryRedisManager =
recordDocHasHistoryOps: (project_id, doc_id, ops = [], callback = (error) ->) ->
if ops.length == 0
return callback(new Error("cannot push no ops")) # This should never be called with no ops, but protect against a redis error if we sent an empty array to rpush
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logger.log project_id: project_id, doc_id: doc_id, "marking doc in project for history ops"
rclient.sadd Keys.docsWithHistoryOps({project_id}), doc_id, (error) ->
return callback(error) if error?
callback()