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# Encapsulate the cable connection held by the consumer. This is an internal class not intended for direct user manipulation.
{message_types} = ActionCable.INTERNAL
class ActionCable.Connection
@reopenDelay: 500
constructor: (@consumer) ->
@open()
send: (data) ->
if @isOpen()
@webSocket.send(JSON.stringify(data))
true
else
false
open: =>
if @webSocket and not @isClosed()
console.log("[cable] Attemped to open WebSocket, but existing socket is #{@getState()}", Date.now())
throw new Error("Existing connection must be closed before opening")
else
console.log("[cable] Opening WebSocket, current state is #{@getState()}", Date.now())
@webSocket = new WebSocket(@consumer.url)
@installEventHandlers()
true
close: ->
@webSocket?.close()
reopen: ->
console.log("[cable] Reopening WebSocket, current state is #{@getState()}", Date.now())
if @isClosed()
@open()
else
try
@close()
finally
console.log("[cable] Failed to reopen WebSocket, retrying in #{@constructor.reopenDelay}ms", Date.now())
setTimeout(@open, @constructor.reopenDelay)
isOpen: ->
@isState("open")
# Private
isClosed: ->
@isState("closing", "closed")
isState: (states...) ->
@getState() in states
getState: ->
return state.toLowerCase() for state, value of WebSocket when value is @webSocket?.readyState
null
installEventHandlers: ->
for eventName of @events
handler = @events[eventName].bind(this)
@webSocket["on#{eventName}"] = handler
return
events:
message: (event) ->
{identifier, message, type} = JSON.parse(event.data)
switch type
when message_types.confirmation
@consumer.subscriptions.notify(identifier, "connected")
when message_types.rejection
@consumer.subscriptions.reject(identifier)
else
@consumer.subscriptions.notify(identifier, "received", message)
open: ->
console.log("[cable] WebSocket onopen event", Date.now())
@disconnected = false
@consumer.subscriptions.reload()
close: ->
console.log("[cable] WebSocket onclose event", Date.now())
@disconnect()
error: ->
console.log("[cable] WebSocket onerror event", Date.now())
@disconnect()
disconnect: ->
return if @disconnected
@disconnected = true
@consumer.subscriptions.notifyAll("disconnected")
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