# frozen_string_literal: true

module Middleware
  class CustomStatic
    def initialize(app, domain_map)
      @app = app
      @domain_map = domain_map
    end

    def call(env)
      request = Rack::Request.new(env)
      host = request.host

      if (target_path = find_mapped_path(host, request.path))
        env["PATH_INFO"] = target_path
      end

      @app.call(env)
    end

    private

    def find_mapped_path(host, path)
      @domain_map.each do |domain_pattern, subdirectory|
        matcher = "#{host}#{path}"
        return "#{subdirectory}#{path}" if matcher.match?(domain_pattern)
      end

      nil
    end
  end
end