Class: DSLCompose::Parser::ForChildrenOfParser::Descendants

Inherits:
Object
  • Object
show all
Defined in:
lib/dsl_compose/parser/for_children_of_parser/descendants.rb

Instance Method Summary collapse

Constructor Details

#initialize(base_class, final_children_only, skip_classes = []) ⇒ Descendants

Returns a new instance of Descendants.



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# File 'lib/dsl_compose/parser/for_children_of_parser/descendants.rb', line 7

def initialize base_class, final_children_only, skip_classes = []
  @base_class = base_class
  @final_children_only = final_children_only
  @skip_classes = skip_classes
end

Instance Method Details

#classes ⇒ Object 



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# File 'lib/dsl_compose/parser/for_children_of_parser/descendants.rb', line 13

def classes
  # all objects which extend the provided base class
  extending_classes = subclasses @base_class

  # sort the results
  #
  # classes are ordered first by name
  extending_classes.sort_by! do |child_class|
    "#{child_class.name.split("::").count}_#{has_descendants(child_class) ? 0 : 1}_#{child_class.name}"
  end
  # then by ansestory chain (i.e. ancestors before descendants)
  extending_classes.sort! do |a, b|
    if a < b
      1
    elsif a > b
      -1
    else
      a.name <=> b.name
    end
  end

  # reject any classes which we are skipping
  extending_classes.reject! do |child_class|
    @skip_classes.include? child_class.name
  end

  # if this is not a final child, but we are processing final children only, then skip it
  if @final_children_only
    # reject any classes which have descendants
    extending_classes.reject! do |child_class|
      has_descendants child_class
    end
  end

  extending_classes
end