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# Encapsulate the cable connection held by the consumer. This is an internal class not intended for direct user manipulation.
class Cable.Connection
@reopenDelay: 500
constructor: (@consumer) ->
@open()
send: (data) ->
if @isOpen()
@webSocket.send(JSON.stringify(data))
true
else
false
open: =>
if @webSocket and not @isState("closed")
throw new Error("Existing connection must be closed before opening")
else
@webSocket = new WebSocket(@consumer.url)
@installEventHandlers()
true
close: ->
@webSocket?.close()
reopen: ->
if @isState("closed")
@open()
else
try
@close()
finally
setTimeout(@open, @constructor.reopenDelay)
isOpen: ->
@isState("open")
# Private
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} = JSON.parse(event.data)
@consumer.subscriptions.notify(identifier, "received", message)
open: ->
@disconnected = false
@consumer.subscriptions.reload()
close: ->
@disconnect()
error: ->
@disconnect()
disconnect: ->
return if @disconnected
@disconnected = true
@consumer.subscriptions.notifyAll("disconnected")
toJSON: ->
state: @getState()
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