Class: MetadataPresenter::Route

Inherits:
Object
  • Object
show all
Defined in:
app/models/metadata_presenter/route.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(service:, traverse_from:, row: 0, column: 0) ⇒ Route

Returns a new instance of Route.



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# File 'app/models/metadata_presenter/route.rb', line 6

def initialize(service:, traverse_from:, row: 0, column: 0)
  @service = service
  @traverse_from = traverse_from
  @row = row
  @column = column
  @routes = []
  @flow_uuids = []
end

Instance Attribute Details

#column ⇒ Object

Returns the value of attribute column.



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# File 'app/models/metadata_presenter/route.rb', line 4

def column
  @column
end

#flow_uuids ⇒ Object

Returns the value of attribute flow_uuids.



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# File 'app/models/metadata_presenter/route.rb', line 4

def flow_uuids
  @flow_uuids
end

#routes ⇒ Object

Returns the value of attribute routes.



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# File 'app/models/metadata_presenter/route.rb', line 4

def routes
  @routes
end

#row ⇒ Object

Returns the value of attribute row.



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# File 'app/models/metadata_presenter/route.rb', line 4

def row
  @row
end

#traverse_from ⇒ Object (readonly)

Returns the value of attribute traverse_from.



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# File 'app/models/metadata_presenter/route.rb', line 3

def traverse_from
  @traverse_from
end

Instance Method Details

#traverse ⇒ Object 



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# File 'app/models/metadata_presenter/route.rb', line 15

def traverse
  @flow_uuid = traverse_from

  index = column
  until @flow_uuid.blank?
    if index > service.flow.size
      ActiveSupport::Notifications.instrument(
        'exceeded_total_flow_objects',
        message: 'Exceeded total number of flow objects'
      )
      break
    end

    @flow_uuids.push(@flow_uuid) unless @flow_uuids.include?(@flow_uuid)
    flow_object = service.flow_object(@flow_uuid)

    if flow_object.branch?
      destinations = destination_uuids(flow_object)
      # Take the first conditional destination and follow that until the end
      # of the route.
      @flow_uuid = destinations.shift

      # The remaining conditional destinations and the branch's default next
      # (otherwise) will be the starting point for a new Route object to be
      # traversed.
      # The default behaviour is that the next destination will be on the row
      # below this current route's row. This can be changed under certain
      # conditions in the Grid model.
      # Each of the destinations need to be placed in the column after the
      # current column.
      row_number = row + 1
      column_number = index + 1
      destinations.each do |uuid|
        @routes.push(
          MetadataPresenter::Route.new(
            service: service,
            traverse_from: uuid,
            row: row_number,
            column: column_number
          )
        )
        row_number += 1
      end
    else
      @flow_uuid = flow_object.default_next
    end

    index += 1
  end

  @flow_uuids
end