Class: NtiReceiptBuilder::Renderer

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

Overview

The single entry point that assembles a template's visible layout elements into presenters. The designer preview and the printed receipt both call this — never two divergent render code paths.

Pass a receipt_object for real data; omit it and the configured variables class supplies samples, without calling any mapping method.

Instance Method Summary collapse

Constructor Details

#initialize(template:, receipt_object: nil, variables_class: NtiReceiptBuilder.variables_class) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/nti_receipt_builder/renderer.rb', line 11

def initialize(template:, receipt_object: nil, variables_class: NtiReceiptBuilder.variables_class)
  @template = template
  @receipt_object = receipt_object
  @variables_class = variables_class
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/nti_receipt_builder/renderer.rb', line 17

def call
  data = resolve_data
  resolved_variables = VariableResolver.new(data, definitions: variables_class.definitions).call
  collection_rows = collection_key ? data[collection_key] || [] : []

  presenters = visible_elements
               .map { |element| build_presenter(element, resolved_variables, collection_rows) }
               .sort_by(&:z_index)

  RenderResult.new(
    elements: presenters,
    overflow: overflow?(presenters),
    content_height_mm: content_height_mm(presenters)
  )
end