module PactBroker
  module StringRefinements
    refine NilClass do
      def blank?
        true
      end
    end

    refine Numeric do
      def blank?
        false
      end
    end

    refine String do
      def not_blank?
        !blank?
      end

      def blank?
        self.strip.size == 0
      end

      # ripped from rubyworks/facets, thank you
      def snakecase
        gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2')
        .gsub(/([a-z\d])([A-Z])/,'\1_\2')
        .tr("-", "_")
        .gsub(/\s/, "_")
        .gsub(/__+/, "_")
        .downcase
      end

      # ripped from rubyworks/facets, thank you
      def camelcase(*separators)
        case separators.first
        when Symbol, TrueClass, FalseClass, NilClass
          first_letter = separators.shift
        end

        separators = ["_", "\\s"] if separators.empty?

        str = self.dup

        separators.each do |s|
          str = str.gsub(/(?:#{s}+)([a-z])/){ $1.upcase }
        end

        case first_letter
        when :upper, true
          str = str.gsub(/(\A|\s)([a-z])/){ $1 + $2.upcase }
        when :lower, false
          str = str.gsub(/(\A|\s)([A-Z])/){ $1 + $2.downcase }
        end

        str
      end

      # Adopt from https://stackoverflow.com/questions/1451384/how-can-i-center-truncate-a-string
      def ellipsisize(minimum_length: 20, edge_length: 10)
        return self if self.length < minimum_length || self.length <= edge_length * 2

        edge = "." * edge_length
        mid_length = self.length - edge_length * 2
        gsub(/(#{edge}).{#{mid_length},}(#{edge})/, '\1...\2')
      end
    end
  end
end