Module: Facebook::Messenger::Bot

Includes:
HTTParty
Defined in:
lib/facebook/messenger/bot.rb,
lib/facebook/messenger/bot/tag.rb,
lib/facebook/messenger/bot/exceptions.rb,
lib/facebook/messenger/bot/error_parser.rb,
lib/facebook/messenger/bot/message_type.rb,
lib/facebook/messenger/bot/messaging_type.rb

Overview

Module Bot provides functionality to sends and receives messages.

Defined Under Namespace

Modules: MessageType, MessagingType, Tag Classes: AccessTokenError, AccountLinkingError, BadParameterError, ErrorParser, InternalError, LimitError, PermissionError, SendError

Constant Summary collapse

EVENTS =

Returns Array containing the supported webhook events.

Returns:

  • (Array) —

    Array containing the supported webhook events.

i[
  message
  delivery
  postback
  optin
  read
  
  referral
  message_echo
  payment
  policy_enforcement
].freeze

Class Method Summary collapse

Class Method Details

.default_options ⇒ Hash

Default HTTParty options.

Returns:

  • (Hash) —

    Default HTTParty options.



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# File 'lib/facebook/messenger/bot.rb', line 132

def default_options
  super.merge(
    read_timeout: 300,
    headers: {
      'Content-Type' => 'application/json'
    }
  )
end

.deliver(message, access_token:, app_secret_proof: nil) ⇒ Object

Deliver a message with the given payload. developers.facebook.com/docs/graph-api/securing-requests/ Note: we provide a helper function available at Messenger::Configuration::Providers::Base#calculate_app_secret_proof

Returns a String describing the message ID if the message was sent, or raises an exception if it was not.

Parameters:

  • message (Hash) —

    A Hash describing the recipient and the message.

  • access_token (String) —

    Access token.

  • app_secret_proof (String) (defaults to: nil) —

    proof of the app_secret

Raises:

See Also:



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# File 'lib/facebook/messenger/bot.rb', line 49

def deliver(message, access_token:, app_secret_proof: nil)
  query = {
    access_token: access_token
  }
  query[:appsecret_proof] = app_secret_proof if app_secret_proof
  response = post '/messages',
                  body: JSON.dump(message),
                  format: :json,
                  query: query

  Facebook::Messenger::Bot::ErrorParser.raise_errors_from(response)

  response.body
end

.hooks ⇒ Hash

Return a Hash of hooks.

Returns:

  • (Hash) —

    Hash of hooks.



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# File 'lib/facebook/messenger/bot.rb', line 114

def hooks
  @hooks ||= {}
end

.on(event, &block) ⇒ Object

Register a hook for the given event.

Parameters:

  • event (String) —

    A String describing a Messenger event.

  • block (Block) —

    A code block to run upon the event.

Returns:

  • Save event and its block in hooks.

Raises:

  • (ArgumentError) —

    if received event is not registered.



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# File 'lib/facebook/messenger/bot.rb', line 72

def on(event, &block)
  unless EVENTS.include? event
    raise ArgumentError,
          "#{event} is not a valid event; " \
          "available events are #{EVENTS.join(',')}"
  end

  hooks[event] = block
end

.receive(payload) ⇒ Object

Receive a given message from Messenger.

Parameters:

  • payload (Hash) —

    A Hash describing the message.

Returns:

  • pass event and object of callback class to trigger function.

See Also:



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# File 'lib/facebook/messenger/bot.rb', line 90

def receive(payload)
  callback = Facebook::Messenger::Incoming.parse(payload)
  event = Facebook::Messenger::Incoming::EVENTS.invert[callback.class]
  trigger(event.to_sym, callback)
end

.trigger(event, *args) ⇒ Object

Trigger the hook for the given event. Fetch callback for event from hooks and call it.

Parameters:

  • event (String) —

    A String describing a Messenger event.

  • args (Object) —

    Arguments to pass to the hook.

Raises:

  • (KeyError) —

    if hook is not registered for event



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# File 'lib/facebook/messenger/bot.rb', line 103

def trigger(event, *args)
  hooks.fetch(event).call(*args)
rescue KeyError
  warn "Ignoring #{event} (no hook registered)"
end

.unhook ⇒ Hash

Deregister all hooks.

Returns:

  • (Hash) —

    Assign empty hash to hooks and return it.



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# File 'lib/facebook/messenger/bot.rb', line 123

def unhook
  @hooks = {}
end