module Ckeditor::Utils

def escape_single_quotes(str)
  str.gsub('\\','\0\0').gsub('</','<\/').gsub(/\r\n|\n|\r/, "\\n").gsub(/["']/) { |m| "\\#{m}" }
end

def filethumb(filename)
  extname = filename.blank? ? 'unknown' : File.extname(filename).gsub(/^\./, '')
  image = "#{extname}.gif"
  source = Ckeditor.root_path.join('app/assets/javascripts/ckeditor/filebrowser/images/thumbs')
  image = 'unknown.gif' unless File.exist?(File.join(source, image))
  File.join(Ckeditor.relative_path, 'filebrowser/images/thumbs', image)
end

def js_fileuploader(uploader_type, options = {})
  options = { multiple: true, element: 'fileupload' }.merge(options)
  case uploader_type.to_s.downcase
  when 'image' then
    options[:action] = JavascriptCode.new('EDITOR.config.filebrowserImageUploadUrl')
    options[:allowedExtensions] = Ckeditor.image_file_types
  when 'flash' then
    options[:action] = JavascriptCode.new('EDITOR.config.filebrowserFlashUploadUrl')
    options[:allowedExtensions] = Ckeditor.flash_file_types
  else
    options[:action] = JavascriptCode.new('EDITOR.config.filebrowserUploadUrl')
    options[:allowedExtensions] = Ckeditor.attachment_file_types
  end
  js_options = ActiveSupport::JSON.encode(options)
  js_options.gsub!(/"(EDITOR\.config\.filebrowser(Image|Flash|)UploadUrl)"/, '\1')
  "(function() { new qq.FileUploaderInput(#{js_options}); }).call(this);".html_safe
end

def js_replace(dom_id, options = nil)
  js = ["(function() { if (typeof CKEDITOR != 'undefined') {"]
  if options && !options.keys.empty?
    js_options = ActiveSupport::JSON.encode(options)
    js << "if (CKEDITOR.instances['#{dom_id}'] == undefined) { CKEDITOR.replace('#{dom_id}', #{js_options}); }"
  else
    js << "if (CKEDITOR.instances['#{dom_id}'] == undefined) { CKEDITOR.replace('#{dom_id}'); }"
  end
  js << '} else { setTimeout(arguments.callee, 50); } })();'
  js.join.html_safe
end

def parameterize_filename(filename)
  return filename unless Ckeditor.parameterize_filenames
  extension = File.extname(filename)
  basename = filename.gsub(/#{extension}$/, '')
  [basename.parameterize('_'), extension].join.downcase
end

def select_assets(path, relative_path)
  relative_folder = Ckeditor.root_path.join(relative_path)
  folder = relative_folder.join(path)
  extensions = '*.{js,css,png,gif,jpg,html}'
  languages = (Ckeditor.assets_languages || [])
  # Files at root
  files = Dir[folder.join(extensions)]
  # Filter plugins
  if Ckeditor.assets_plugins.nil?
    files += Dir[folder.join('plugins', '**', extensions)]
  else
    Ckeditor.assets_plugins.each do |plugin|
      files += Dir[folder.join('plugins', plugin, '**', extensions)]
    end
  end
  # Other folders
  Dir[folder.join('*/')].each do |subfolder|
    path = Pathname.new(subfolder)
    next if ['plugins'].include?(path.basename.to_s)
    files += Dir[path.join('**', extensions)]
  end
  files.inject([]) do |items, name|
    file = Pathname.new(name)
    base = file.basename('.*').to_s
    if !name.include?('/lang/') || languages.include?(base)
      items << file.relative_path_from(relative_folder).to_s
    end
    items
  end
end