module Munge
  module Reader
    class Filesystem
      include Enumerable

      def initialize(source_path)
        @source_path = source_path
      end

      def each
        return enum_for(:each) unless block_given?

        filepaths =
          Dir.glob(File.join(@source_path, "**", "*"))
            .select { |path| File.file?(path) }

        filepaths.each do |abspath|
          filehash = Hash[
            relpath: compute_relpath(abspath),
            content: compute_content(abspath),
            stat: compute_stat(abspath)
          ]

          yield filehash
        end
      end

      private

      def compute_stat(abspath)
        File.stat(abspath)
      end

      def compute_relpath(abspath)
        folder = Pathname.new(@source_path)
        file   = Pathname.new(abspath)

        file.relative_path_from(folder).to_s
      end

      def compute_content(abspath)
        File.read(abspath)
      end
    end
  end
end