Class: MingleEvents::Processors::CardData

Inherits:
Object
  • Object
show all
Defined in:
lib/mingle_events/processors/card_data.rb

Overview

Provides ability to lookup card data, e.g., card’s type name, for any card serving as a source for the stream of events. Implements two interfaces: the standard event processing interface, handle_events, and also, for_card_event, which returns of has of card data for the given event. See the project README for additional information on using this class in a processing pipeline.

Instance Method Summary collapse

Constructor Details

#initialize(mingle_access, project_identifier, custom_properties = ProjectCustomProperties.new(mingle_access, project_identifier)) ⇒ CardData

Returns a new instance of CardData.



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# File 'lib/mingle_events/processors/card_data.rb', line 11

def initialize(mingle_access, project_identifier, custom_properties = ProjectCustomProperties.new(mingle_access, project_identifier))
  @mingle_access = mingle_access
  @project_identifier = project_identifier
  @custom_properties = custom_properties
  @card_data_by_number_and_version = nil
end

Instance Method Details

#for_card_event(card_event) ⇒ Object

Return a hash of data for the card that sourced the passed event. The data will be for the version of the card that was created by the event and not the current state of the card. Currently supported data keys are: :number, :version, :card_type_name



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# File 'lib/mingle_events/processors/card_data.rb', line 29

def for_card_event(card_event)
  if @card_data_by_number_and_version.nil?
    load_bulk_card_data
  end
  key = data_key(card_event.card_number, card_event.version)
  @card_data_by_number_and_version[key] ||= load_card_data_for_event(card_event)
end

#process_events(events) ⇒ Object

Capture which events are card events and might require data lookup. The actual data retrieval is lazy and will only occur as needed.



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# File 'lib/mingle_events/processors/card_data.rb', line 20

def process_events(events)
  @card_events = events.select(&:card?)     
  events      
end