# frozen_string_literal: true

# Convert Hash with mixed array and hash values to an
# array of paths.
module Runger::Ext::FlattenNames
  refine ::Array do
    def flatten_names(prefix, buf)
      if empty?
        buf << :"#{prefix}"
        return buf
      end

      each_with_object(buf) do |name, acc|
        if name.is_a?(::Symbol)
          acc << :"#{prefix}.#{name}"
        else
          name.flatten_names(prefix, acc)
        end
      end
    end
  end

  refine ::Hash do
    def flatten_names(prefix = nil, buf = [])
      each_with_object(buf) do |(k, v), acc|
        parent = prefix ? "#{prefix}.#{k}" : k
        v.flatten_names(parent, acc)
      end
    end
  end

  using self
end