Class: Slacks::Driver

Inherits:
Object
  • Object
show all
Defined in:
lib/slacks/driver.rb

Constant Summary collapse

VALID = 
[:open, :message, :error].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Driver

Returns a new instance of Driver.



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# File 'lib/slacks/driver.rb', line 11

def initialize
  @has_been_init = false
  @stop = false
  @callbacks = {}
end

Instance Attribute Details

#stop ⇒ Object

Returns the value of attribute stop.



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# File 'lib/slacks/driver.rb', line 9

def stop
  @stop
end

Instance Method Details

#connect_to(url) ⇒ Object

This init has been delayed because the SSL handshake is a blocking and expensive call



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# File 'lib/slacks/driver.rb', line 28

def connect_to(url)
  raise "Already been init" if @has_been_init
  url = URI(url)
  raise ArgumentError.new ":url must be a valid websocket secure url!" unless url.scheme == "wss"

  @socket = OpenSSL::SSL::SSLSocket.new(TCPSocket.new url.host, 443)
  socket.connect # costly and blocking !

  internalWrapper = (Struct.new :url, :socket do
    def write(*args)
      self.socket.write(*args)
    end
  end).new url.to_s, socket

  # this, also, is costly and blocking
  @driver = WebSocket::Driver.client internalWrapper
  driver.on :open do
    @connected = true
    unless callbacks[:open].nil?
      callbacks[:open].call
    end
  end

  driver.on :error do |event|
    @connected = false
    unless callbacks[:error].nil?
      callbacks[:error].call event
    end
  end

  driver.on :message do |event|
    data = MultiJson.load event.data
    unless callbacks[:message].nil?
      callbacks[:message].call data
    end
  end

  driver.start
  @has_been_init = true
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/slacks/driver.rb', line 73

def connected?
  @connected || false
end

#inner_loop ⇒ Object

All the polling work is done here



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# File 'lib/slacks/driver.rb', line 78

def inner_loop
  return if @stop

  data = @socket.readpartial 4096
  driver.parse data unless data.nil? or data.empty?
end

#main_loop ⇒ Object 



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# File 'lib/slacks/driver.rb', line 85

def main_loop
  loop do
    inner_loop
  end
end

#on(type, &block) ⇒ Object 



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# File 'lib/slacks/driver.rb', line 18

def on(type, &block)
  unless VALID.include? type
    raise ArgumentError.new "Client#on accept one of #{VALID.inspect}"
  end

  callbacks[type] = block
end

#write(message) ⇒ Object 



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# File 'lib/slacks/driver.rb', line 69

def write(message)
  @driver.text(message)
end