Class: Faye::Server

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# File 'lib/faye/protocol/server.rb', line 150

def connect(message, local = false, &callback)
  response        = make_response(message)
  client_id       = message['clientId']
  connection_type = message['connectionType']
  
  @engine.client_exists(client_id) do |exists|
    response['error'] = Error.client_unknown(client_id) unless exists
    response['error'] = Error.parameter_missing('clientId') if client_id.nil?
    
    unless CONNECTION_TYPES.include?(connection_type)
      response['error'] = Error.conntype_mismatch(connection_type)
    end
    
    response['error'] = Error.parameter_missing('connectionType') if connection_type.nil?
    
    response['successful'] = response['error'].nil?
    
    if response['successful']
      @engine.connect(response['clientId'], message['advice']) do |events|
        callback.call([response] + events)
      end
    else
      response.delete('clientId')
      callback.call(response)
    end
  end
end

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# File 'lib/faye/protocol/server.rb', line 181

def disconnect(message, local = false, &callback)
  response   = make_response(message)      
  client_id  = message['clientId']
  
  @engine.client_exists(client_id) do |exists|
    response['error'] = Error.client_unknown(client_id) unless exists
    response['error'] = Error.parameter_missing('clientId') if client_id.nil?
    
    response['successful'] = response['error'].nil?
    response.delete('clientId') unless response['successful']
    
    @engine.destroy_client(client_id) if response['successful']
    callback.call(response)
  end
end

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# File 'lib/faye/protocol/server.rb', line 16

def flush_connection(messages)
  [messages].flatten.each do |message|
    client_id = message["clientId"]
    info 'Flushing connection for ?', client_id
    @engine.flush(client_id) if client_id
  end
end

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# File 'lib/faye/protocol/server.rb', line 71

def handle(message, local = false, &callback)
  return callback.call([]) if !message
  info 'Handling message: ? (local: ?)', message, local
  
  channel_name = message['channel']
  
  return handle_meta(message, local, &callback) if Channel.meta?(channel_name)
  
  @engine.publish(message) unless message['error'] or Grammar::CHANNEL_NAME !~ channel_name
  
  if message['clientId']
    response = make_response(message)
    response['successful'] = !response['error']
    callback.call([response])
  else
    callback.call([])
  end
end

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# File 'lib/faye/protocol/server.rb', line 90

def handle_meta(message, local, &callback)
  method = Channel.parse(message['channel'])[1]
  
  __send__(method, message, local) do |responses|
    responses = [responses].flatten
    responses.each(&method(:advize))
    callback.call(responses)
  end
end

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# File 'lib/faye/protocol/server.rb', line 118

def handshake(message, local = false, &callback)
  response = make_response(message)
  response['version'] = BAYEUX_VERSION
  
  response['error'] = Error.parameter_missing('version') if message['version'].nil?
  
  client_conns = message['supportedConnectionTypes']
  
  unless local
    response['supportedConnectionTypes'] = CONNECTION_TYPES
    
    if client_conns
      common_conns = client_conns.select { |c| CONNECTION_TYPES.include?(c) }
      response['error'] = Error.conntype_mismatch(*client_conns) if common_conns.empty?
    else
      response['error'] = Error.parameter_missing('supportedConnectionTypes')
    end
  end
  
  response['successful'] = response['error'].nil?
  return callback.call(response) unless response['successful']
  
  @engine.create_client do |client_id|
    response['clientId'] = client_id
    callback.call(response)
  end
end

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# File 'lib/faye/protocol/server.rb', line 60

def make_response(message)
  response = {}
  %w[id clientId channel error].each do |field|
    if message[field]
      response[field] = message[field]
    end
  end
  response['successful'] = !response['error']
  response
end

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# File 'lib/faye/protocol/server.rb', line 24

def process(messages, local = false, &callback)
  messages = [messages].flatten
  info 'Processing messages: ? (local: ?)', messages, local

  return callback.call([]) if messages.size == 0
  processed, responses = 0, []
  
  gather_replies = lambda do |replies|
    responses.concat(replies)
    processed += 1
    responses.compact!
    info 'Returning replies: ?', responses
    callback.call(responses) if processed == messages.size
  end
  
  handle_reply = lambda do |replies|
    extended, expected = 0, replies.size
    gather_replies.call(replies) if expected == 0
    
    replies.each_with_index do |reply, i|
      debug 'Processing reply: ?', reply
      pipe_through_extensions(:outgoing, reply) do |message|
        replies[i] = message
        extended  += 1
        gather_replies.call(replies) if extended == expected
      end
    end
  end
  
  messages.each do |message|
    pipe_through_extensions(:incoming, message) do |piped_message|
      handle(piped_message, local, &handle_reply)
    end
  end
end

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# File 'lib/faye/protocol/server.rb', line 201

def subscribe(message, local = false, &callback)
  response     = make_response(message)
  client_id    = message['clientId']
  subscription = [message['subscription']].flatten
  
  @engine.client_exists(client_id) do |exists|
    response['error'] = Error.client_unknown(client_id) unless exists
    response['error'] = Error.parameter_missing('clientId') if client_id.nil?
    response['error'] = Error.parameter_missing('subscription') if message['subscription'].nil?
    
    response['subscription'] = message['subscription'] || []
    
    subscription.each do |channel|
      next if response['error']
      response['error'] = Error.channel_forbidden(channel) unless local or Channel.subscribable?(channel)
      response['error'] = Error.channel_invalid(channel) unless Channel.valid?(channel)
      
      next if response['error']
      @engine.subscribe(client_id, channel)
    end
    
    response['successful'] = response['error'].nil?
    callback.call(response)
  end
end

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# File 'lib/faye/protocol/server.rb', line 231

def unsubscribe(message, local = false, &callback)
  response     = make_response(message)
  client_id    = message['clientId']
  subscription = [message['subscription']].flatten
  
  @engine.client_exists(client_id) do |exists|
    response['error'] = Error.client_unknown(client_id) unless exists
    response['error'] = Error.parameter_missing('clientId') if client_id.nil?
    response['error'] = Error.parameter_missing('subscription') if message['subscription'].nil?
    
    response['subscription'] = message['subscription'] || []
    
    subscription.each do |channel|
      next if response['error']
      response['error'] = Error.channel_forbidden(channel) unless local or Channel.subscribable?(channel)
      response['error'] = Error.channel_invalid(channel) unless Channel.valid?(channel)
      
      next if response['error']
      @engine.unsubscribe(client_id, channel)
    end
    
    response['successful'] = response['error'].nil?
    callback.call(response)
  end
end