Method: Ably::Models::ProtocolMessage#timestamp

Defined in:
lib/ably/models/protocol_message.rb,
lib/ably/models/protocol_message.rb

#timestamp ⇒ Time (readonly)

Returns An optional timestamp, applied by the service in messages sent to the client, to indicate the system time at which the message was sent (milliseconds past epoch).

Returns:

  • (Time) —

    An optional timestamp, applied by the service in messages sent to the client, to indicate the system time at which the message was sent (milliseconds past epoch)



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
 
# File 'lib/ably/models/protocol_message.rb', line 40

class ProtocolMessage
  include Ably::Modules::ModelCommon
  include Ably::Modules::Encodeable
  include Ably::Modules::SafeDeferrable if defined?(Ably::Realtime)
  extend Ably::Modules::Enum

  # Actions which are sent by the Ably Realtime API
  #
  # The values correspond to the ints which the API
  # understands.
  ACTION = ruby_enum('ACTION',
    heartbeat:    0,
    ack:          1,
    nack:         2,
    connect:      3,
    connected:    4,
    disconnect:   5,
    disconnected: 6,
    close:        7,
    closed:       8,
    error:        9,
    attach:       10,
    attached:     11,
    detach:       12,
    detached:     13,
    presence:     14,
    message:      15,
    sync:         16,
    auth:         17
  )

  # Indicates this protocol message action will generate an ACK response such as :message or :presence
  # @api private
  def self.ack_required?(for_action)
    ACTION(for_action).match_any?(ACTION.Presence, ACTION.Message)
  end

  # {ProtocolMessage} initializer
  #
  # @param  hash_object [Hash]            object with the underlying protocol message data
  # @param  [Hash]      options           an options Hash for this initializer
  # @option options     [Logger]          :logger            An optional Logger to be used by {Ably::Modules::SafeDeferrable} if an exception is caught in a callback
  #
  def initialize(hash_object, options = {})
    @logger = options[:logger] # Logger expected for SafeDeferrable

    @raw_hash_object = hash_object
    @hash_object     = IdiomaticRubyWrapper(@raw_hash_object.clone)

    raise ArgumentError, 'Invalid ProtocolMessage, action cannot be nil' if @hash_object[:action].nil?
    @hash_object[:action] = ACTION(@hash_object[:action]).to_i unless @hash_object[:action].kind_of?(Integer)

    @hash_object.freeze
  end

  %w(id channel channel_serial connection_id).each do |attribute|
    define_method attribute do
      attributes[attribute.to_sym]
    end
  end

  def connection_key
    # connection_key in connection details takes precedence over connection_key on the ProtocolMessage
    # connection_key in the ProtocolMessage will be deprecated in future protocol versions > 0.8
    connection_details.connection_key || attributes[:connection_key]
  end

  def id!
    raise RuntimeError, 'ProtocolMessage #id is nil' unless id
    id
  end

  def action
    ACTION(attributes[:action])
  rescue KeyError
    raise KeyError, "Action '#{attributes[:action]}' is not supported by ProtocolMessage"
  end

  def error
    @error ||= ErrorInfo.new(attributes[:error]) if attributes[:error]
  end

  def timestamp
    as_time_from_epoch(attributes[:timestamp]) if attributes[:timestamp]
  end

  def message_serial
    Integer(attributes[:msg_serial])
  rescue TypeError
    raise TypeError, "msg_serial '#{attributes[:msg_serial]}' is invalid, a positive Integer is expected for a ProtocolMessage"
  end

  def connection_serial
    Integer(attributes[:connection_serial])
  rescue TypeError
    raise TypeError, "connection_serial '#{attributes[:connection_serial]}' is invalid, a positive Integer is expected for a ProtocolMessage"
  end

  def count
    [1, attributes[:count].to_i].max
  end

  # @api private
  def has_message_serial?
    message_serial && true
  rescue TypeError
    false
  end

  # @api private
  def has_connection_serial?
    connection_serial && true
  rescue TypeError
    false
  end

  def serial
    if has_connection_serial?
      connection_serial
    else
      message_serial
    end
  end

  # @api private
  def has_serial?
    has_connection_serial? || has_message_serial?
  end

  def messages
    @messages ||=
      Array(attributes[:messages]).map do |message|
        Ably::Models.Message(message, protocol_message: self)
      end
  end

  # @api private
  def add_message(message)
    messages << message
  end

  def presence
    @presence ||=
      Array(attributes[:presence]).map do |message|
        Ably::Models.PresenceMessage(message, protocol_message: self)
      end
  end

  def flags
    Integer(attributes[:flags])
  rescue TypeError
    0
  end

  # @api private
  def has_presence_flag?
    flags & 1 == 1
  end

  # @api private
  def has_backlog_flag?
    flags & 2 == 2
  end

  # @api private
  def has_channel_resumed_flag?
    flags & 4 == 4
  end

  def connection_details
    @connection_details ||= Ably::Models::ConnectionDetails(attributes[:connection_details])
  end

  def auth
    @auth ||= Ably::Models::AuthDetails(attributes[:auth])
  end

  # Indicates this protocol message will generate an ACK response when sent
  # Examples of protocol messages required ACK include :message and :presence
  # @api private
  def ack_required?
    self.class.ack_required?(action)
  end

  def attributes
    @hash_object
  end

  # Return a JSON ready object from the underlying #attributes using Ably naming conventions for keys
  def as_json(*args)
    raise TypeError, ':action is missing, cannot generate a valid Hash for ProtocolMessage' unless action
    raise TypeError, ':msg_serial or :connection_serial is missing, cannot generate a valid Hash for ProtocolMessage' if ack_required? && !has_serial?

    attributes.dup.tap do |hash_object|
      hash_object['action']   = action.to_i
      hash_object['messages'] = messages.map(&:as_json) unless messages.empty?
      hash_object['presence'] = presence.map(&:as_json) unless presence.empty?
    end.as_json
  end

  def to_s
    json_hash = as_json

    # Decode any binary data to before converting to a JSON string representation
    %w(messages presence).each do |message_type|
      if json_hash[message_type] && !json_hash[message_type].empty?
        json_hash[message_type].each do |message|
          decode_binary_data_before_to_json message
        end
      end
    end

    json_hash.to_json
  end

  # True if the ProtocolMessage appears to be invalid, however this is not a guarantee
  # @return [Boolean]
  # @api private
  def invalid?
    action_enum = action rescue nil
    !action_enum || (ack_required? && !has_serial?)
  end

  # @!attribute [r] logger
  # @api private
  attr_reader :logger
end