Class: SelfSDK::MessagingClient

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

Constant Summary collapse

DEFAULT_DEVICE = 
"1"
DEFAULT_AUTO_RECONNECT = 
true
PRIORITIES = 
{ 
'chat.invite':                 SelfSDK::Messages::PRIORITY_VISIBLE,
'chat.join':                   SelfSDK::Messages::PRIORITY_INVISIBLE,
'chat.message':                SelfSDK::Messages::PRIORITY_VISIBLE,
'chat.message.delete':         SelfSDK::Messages::PRIORITY_INVISIBLE,
'chat.message.delivered':      SelfSDK::Messages::PRIORITY_INVISIBLE,
'chat.message.edit':           SelfSDK::Messages::PRIORITY_INVISIBLE,
'chat.message.read':           SelfSDK::Messages::PRIORITY_INVISIBLE,
'chat.remove':                 SelfSDK::Messages::PRIORITY_INVISIBLE,
'document.sign.req':           SelfSDK::Messages::PRIORITY_VISIBLE,
'identities.authenticate.req': SelfSDK::Messages::PRIORITY_VISIBLE,
'identities.connections.req':  SelfSDK::Messages::PRIORITY_VISIBLE,
'identities.facts.query.req':  SelfSDK::Messages::PRIORITY_VISIBLE,
'identities.facts.issue':      SelfSDK::Messages::PRIORITY_VISIBLE,
'identities.notify':           SelfSDK::Messages::PRIORITY_VISIBLE }.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, client, storage_key, storage, options = {}) ⇒ MessagingClient

RestClient initializer

Parameters:

  • url (string) —

    self-messaging url

  • opts (Hash) —

    a customizable set of options



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# File 'lib/messaging.rb', line 117

def initialize(url, client, storage_key, storage, options = {})
  @mon = Monitor.new
  @messages = {}
  @acks = {}
  @type_observer = {}
  @uuid_observer = {}
  @jwt = client.jwt
  @client = client
  @ack_timeout = 60 # seconds
  @timeout = 120 # seconds
  @auth_id = SecureRandom.uuid
  @device_id = options.fetch(:device_id, DEFAULT_DEVICE)
  @source = SelfSDK::Sources.new("#{__dir__}/sources.json")
  @storage = storage

  unless options.include? :no_crypto
    @encryption_client = Crypto.new(@client, @device_id, @storage, storage_key)
  end
  @offset = @storage.

  @ws = if options.include? :ws
          options[:ws]
        else
          WebsocketClient.new(url,
                              options.fetch(:auto_reconnect, DEFAULT_AUTO_RECONNECT),
                              -> { authenticate },
                              ->(event) { on_message(event) })
        end
end

Instance Attribute Details

#ack_timeout ⇒ Object

Returns the value of attribute ack_timeout.



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# File 'lib/messaging.rb', line 106

def ack_timeout
  @ack_timeout
end

#client ⇒ Object

Returns the value of attribute client.



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# File 'lib/messaging.rb', line 106

def client
  @client
end

#device_id ⇒ Object

Returns the value of attribute device_id.



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# File 'lib/messaging.rb', line 106

def device_id
  @device_id
end

#encryption_client ⇒ Object

Returns the value of attribute encryption_client.



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# File 'lib/messaging.rb', line 106

def encryption_client
  @encryption_client
end

#jwt ⇒ Object

Returns the value of attribute jwt.



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# File 'lib/messaging.rb', line 106

def jwt
  @jwt
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/messaging.rb', line 106

def source
  @source
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/messaging.rb', line 106

def timeout
  @timeout
end

#type_observer ⇒ Object

Returns the value of attribute type_observer.



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# File 'lib/messaging.rb', line 106

def type_observer
  @type_observer
end

#uuid_observer ⇒ Object

Returns the value of attribute uuid_observer.



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# File 'lib/messaging.rb', line 106

def uuid_observer
  @uuid_observer
end

Instance Method Details

#clean_observers ⇒ Object 



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# File 'lib/messaging.rb', line 324

def clean_observers
  live = {}
  @uuid_observer.clone.each do |id, msg|
    if msg[:timeout] < SelfSDK::Time.now
      message = SelfSDK::Messages::Base.new(self)
      message.status = "errored"

      @uuid_observer[id][:block].call(message)
      @uuid_observer.delete(id)
    else
      live[id] = msg
    end
  end
  @uuid_observer = live
end

#close ⇒ Object 



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# File 'lib/messaging.rb', line 196

def close
  @ws.close
end

#notify_observer(message) ⇒ Object

Notify the type observer for the given message



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# File 'lib/messaging.rb', line 341

def notify_observer(message)
  if @uuid_observer.include? message.id
    SelfSDK.logger.debug " - notifying by id"
    observer = @uuid_observer[message.id]
    message.validate!(observer[:original_message]) if observer.include?(:original_message)
    Thread.new do
      @uuid_observer[message.id][:block].call(message)
      @uuid_observer.delete(message.id)
    end
    return
  end

  SelfSDK.logger.debug " - notifying by type"
  SelfSDK.logger.debug " - #{message.typ}"
  SelfSDK.logger.debug " - #{message.payload}"
  SelfSDK.logger.debug " - #{@type_observer.keys.join(',')}"

  # Return if there is no observer setup for this kind of message
  return unless @type_observer.include? message.typ

  SelfSDK.logger.debug " - notifying by type (Y)"
  Thread.new do
    @type_observer[message.typ][:block].call(message)
  end
end

#send_and_wait_for_response(msgs, original) ⇒ Object

Sends a message and waits for the response



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# File 'lib/messaging.rb', line 252

def send_and_wait_for_response(msgs, original)
  SelfSDK.logger.debug "sending/wait for #{msgs.first.id}"
  wait_for msgs.first.id, original do
    msgs.each do |msg|
      send_message msg
    end
  end
end

#send_custom(recipients, request_body) ⇒ Object

Send custom mmessage

Parameters:

  • recipient (string) —

    selfID to be requested

  • type (string) —

    message type

  • request (hash) —

    original message requesing information



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# File 'lib/messaging.rb', line 211

def send_custom(recipients, request_body)
  # convert argument into an array if is a string
  recipients = [recipients] if recipients.is_a? String

  # send to current identity devices except the current one.
  recipients |= [@jwt.id]

  # build recipients list
  recs = []
  recipients.each do |r|
    @client.devices(r).each do |to_device|
      recs << { id: r, device_id: to_device }
    end
  end

  SelfSDK.logger.debug "sending custom message #{request_body.to_json}"
  current_device = "#{@jwt.id}:#{@device_id}"

  recs.each do |r|
    next if current_device == "#{r[:id]}:#{r[:device_id]}"

    request_body[:sub] = r[:id]
    request_body[:aud] = r[:id] unless request_body.key?(:aud)
    ciphertext = @encryption_client.encrypt(@jwt.prepare(request_body), recs)

    m = SelfMsg::Message.new
    m.id = SecureRandom.uuid
    m.sender = current_device
    m.recipient = "#{r[:id]}:#{r[:device_id]}"
    m.ciphertext = ciphertext
    m.message_type = r[:typ]
    m.priority = select_priority(r[:typ])

    SelfSDK.logger.debug "[#{m.id}] -> to #{m.recipient}"
    send_message m
  end
end

#send_message(msg) ⇒ Object

Send a message through self network



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# File 'lib/messaging.rb', line 294

def send_message(msg)
  uuid = msg.id
  @mon.synchronize do
    @acks[uuid] = {
      waiting_cond: @mon.new_cond,
      waiting: true,
      timeout: SelfSDK::Time.now + @ack_timeout,
    }
  end
  @ws.send msg
  SelfSDK.logger.debug "waiting for acknowledgement #{uuid}"
  @mon.synchronize do
    @acks[uuid][:waiting_cond].wait_while do
      @acks[uuid][:waiting]
    end
  end

  # response has timed out
  if @acks[uuid][:timed_out]
    SelfSDK.logger.debug "acknowledgement response timed out re-sending message #{uuid}"
    return send_message(msg)
  end

  SelfSDK.logger.debug "acknowledged #{uuid}"
  true
ensure
  @acks.delete(uuid)
  false
end

#session?(identifier, device) ⇒ Boolean

Checks if the session with a specified identity / device is already created.

Returns:

  • (Boolean) 


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# File 'lib/messaging.rb', line 201

def session?(identifier, device)
  path = @encryption_client.session_path(identifier, device)
  File.file?(path)
end

#set_observer(original, options = {}, &block) ⇒ Object 



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# File 'lib/messaging.rb', line 367

def set_observer(original, options = {}, &block)
  request_timeout = options.fetch(:timeout, @timeout)
  @uuid_observer[original.id] = { original_message: original, block: block, timeout: SelfSDK::Time.now + request_timeout }
end

#start ⇒ Object

Starts the underlying websocket connection.



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# File 'lib/messaging.rb', line 148

def start
  SelfSDK.logger.debug "starting"
  auth_id = @auth_id.dup

  @mon.synchronize do
    @acks[auth_id] = { waiting_cond: @mon.new_cond,
                       waiting: true,
                       timeout: SelfSDK::Time.now + @ack_timeout }
  end

  Thread.new do
    EM.run start_connection
  end

  Thread.new do
    loop do
      sleep 10
      clean_timeouts
      @ws.ping
    end
  end

  @mon.synchronize do
    @acks[auth_id][:waiting_cond].wait_while { @acks[auth_id][:waiting] }
    @acks.delete(auth_id)
  end

  return unless @acks.include? auth_id

  # In case this does not succeed start the process again.
  if @acks[auth_id][:waiting]
    close
    start_connection
  end
  @acks.delete(auth_id)
end

#stop ⇒ Object

Stops the underlying websocket connection.



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# File 'lib/messaging.rb', line 186

def stop
  @acks.each do |k, _v|
    mark_as_acknowledged(k)
  end
  @messages.each do |k, _v|
    mark_as_acknowledged(k)
    mark_as_arrived(k)
  end
end

#subscribe(type, &block) ⇒ Object 



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# File 'lib/messaging.rb', line 372

def subscribe(type, &block)
  type = @source.message_type(type) if type.is_a? Symbol
  SelfSDK.logger.debug "Subscribing to messages by type: #{type}"
  @type_observer[type] = { block: block }
end

#wait_for(uuid, msg = nil) ⇒ Object

Executes the given block and waits for the message id specified on the uuid.



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# File 'lib/messaging.rb', line 265

def wait_for(uuid, msg = nil)
  SelfSDK.logger.debug "sending #{uuid}"
  @mon.synchronize do
    @messages[uuid] = {
      waiting_cond: @mon.new_cond,
      waiting: true,
      timeout: SelfSDK::Time.now + @timeout,
      original_message: msg,
    }
  end

  yield

  SelfSDK.logger.debug "waiting for client to respond #{uuid}"
  @mon.synchronize do
    @messages[uuid][:waiting_cond].wait_while do
      @messages[uuid][:waiting]
    end
  end

  SelfSDK.logger.debug "response received for #{uuid}"
  @messages[uuid][:response]
ensure
  @messages.delete(uuid)
end