class NotificationFactory::Template

=begin

examples how to use

    cleaned_template = NotificationFactory::Template.new(
      'some template <b>#{ticket.title}</b> #{config.fqdn}',
      true,
    ).to_s

=end

  def initialize(template, escape)
    @template = template
    @escape = escape
  end

  def to_s
    strip_html
  end

  def strip_html
    # some browsers start adding HTML tags
    # fixes https://github.com/zammad/zammad/issues/385
    @template.gsub(/\#\{\s*t\((.+?)\)\s*\}/m) do
      if $1 =~ /^'(.+?)'$/
        %(<%= t "#{strip_content($1)}", #{@escape} %>)
      else
        %(<%= t d"#{strip_variable(strip_content($1))}", #{@escape} %>)
      end
    end.gsub(/\#\{\s*config\.(.+?)\s*\}/m) do
      %(<%= c "#{strip_variable($1)}", #{@escape} %>)
    end.gsub(/\#\{(.*?)\}/m) do
      %(<%= d "#{strip_variable($1)}", #{@escape} %>)
    end
  end

  def strip_content(string)
    string&.gsub(/\t|\r|\n/, '')
          &.gsub(/"/, '\"')
  end

  def strip_variable(string)
    string&.gsub(/\t|\r|\n|"|'|§|;/, '')
          &.gsub(/\s*/, '')
          &.gsub(/<.+?>/, '')
  end

end