module YARD::Templates::Helpers::MarkupHelper

def clear_markup_cache
  self.markup_cache = {}
end

def load_markup_provider(type = options.markup)
  return true if MarkupHelper.markup_cache[type]
  MarkupHelper.markup_cache[type] ||= {}
  providers = MARKUP_PROVIDERS[type.to_sym]
  return true if providers && providers.empty?
  if providers && options.markup_provider
    providers = providers.select {|p| p[:lib] == options.markup_provider }
  end
  if providers.nil? || providers.empty?
    log.error "Invalid markup type '#{type}' or markup provider " \
              "(#{options.markup_provider}) is not registered."
    return false
  end
  # Search for provider, return the library class name as const if found
  providers.each do |provider|
    begin require provider[:lib].to_s; rescue LoadError; next end if provider[:lib]
    begin klass = eval("::" + provider[:const]); rescue NameError; next end # rubocop:disable Lint/Eval
    MarkupHelper.markup_cache[type][:provider] = provider[:lib] # Cache the provider
    MarkupHelper.markup_cache[type][:class] = klass
    return true
  end
  # Show error message telling user to install first potential provider
  lib = providers.first[:lib] || type
  log.error "Missing '#{lib}' gem for #{type.to_s.capitalize} formatting. Install it with `gem install #{lib}`"
  false
end

def markup_class(type = options.markup)
  load_markup_provider(type)
  MarkupHelper.markup_cache[type][:class]
end

def markup_file_contents(contents)
  contents =~ MARKUP_FILE_SHEBANG ? $' : contents
end

def markup_for_file(contents, filename)
  return $1.to_sym if contents && contents =~ MARKUP_FILE_SHEBANG # Shebang support
  ext = (File.extname(filename)[1..-1] || '').downcase
  MARKUP_EXTENSIONS.each do |type, exts|
    return type if exts.include?(ext)
  end
  options.markup
end

def markup_provider(type = options.markup)
  MarkupHelper.markup_cache[type][:provider]
end