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45 lines
1.9 KiB
CoffeeScript
45 lines
1.9 KiB
CoffeeScript
logger = require "logger-sharelatex"
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settings = require 'settings-sharelatex'
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redis = require("redis-sharelatex")
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rclient = redis.createClient(settings.redis.web)
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SafeJsonParse = require "./SafeJsonParse"
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MESSAGE_SIZE_LOG_LIMIT = 1024 * 1024 # 1Mb
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module.exports = DocumentUpdaterController =
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# DocumentUpdaterController is responsible for updates that come via Redis
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# Pub/Sub from the document updater.
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listenForUpdatesFromDocumentUpdater: (io) ->
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rclient.subscribe "applied-ops"
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rclient.on "message", (channel, message) ->
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DocumentUpdaterController._processMessageFromDocumentUpdater(io, channel, message)
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_processMessageFromDocumentUpdater: (io, channel, message) ->
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SafeJsonParse.parse message, (error, message) ->
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if error?
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logger.error {err: error, channel}, "error parsing JSON"
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return
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if message.op?
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DocumentUpdaterController._applyUpdateFromDocumentUpdater(io, message.doc_id, message.op)
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else if message.error?
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DocumentUpdaterController._processErrorFromDocumentUpdater(io, message.doc_id, message.error, message)
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_applyUpdateFromDocumentUpdater: (io, doc_id, update) ->
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for client in io.sockets.clients(doc_id)
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if client.id == update.meta.source
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logger.log doc_id: doc_id, version: update.v, source: update.meta?.source, "distributing update to sender"
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client.emit "otUpdateApplied", v: update.v, doc: update.doc
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else if !update.dup # Duplicate ops should just be sent back to sending client for acknowledgement
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logger.log doc_id: doc_id, version: update.v, source: update.meta?.source, client_id: client.id, "distributing update to collaborator"
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client.emit "otUpdateApplied", update
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_processErrorFromDocumentUpdater: (io, doc_id, error, message) ->
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for client in io.sockets.clients(doc_id)
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logger.error err: error, doc_id: doc_id, client_id: client.id, "error from document updater, disconnecting client"
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client.emit "otUpdateError", error, message
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client.disconnect()
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