-- This module implements {{shortcut/sandbox}}.  -- Set constants local CONFIG_MODULE = 'Module:Shortcut/config'  -- Load required modules local checkType = require('libraryUtil').checkType local yesno = require('Module:Yesno')  local p = {}  local function message(msg, ...)  return mw.message.newRawMessage(msg, ...):plain() end  local function makeCategoryLink(cat)  return string.format('[[%s:%s]]', mw.site.namespaces[14].name, cat) end  function p._main(shortcuts, options, frame, cfg)  checkType('_main', 1, shortcuts, 'table')  checkType('_main', 2, options, 'table', true)  options = options or {}  frame = frame or mw.getCurrentFrame()  cfg = cfg or mw.loadData(CONFIG_MODULE)  local isCategorized = yesno(options.category) ~= false   -- Validate shortcuts  for i, shortcut in ipairs(shortcuts) do  if type(shortcut) ~= 'string' or #shortcut < 1 then  error(message(cfg['invalid-shortcut-error'], i), 2)  end  end   -- Make the list items. These are the shortcuts plus any extra lines such  -- as options.msg.  local listItems = {}  for i, shortcut in ipairs(shortcuts) do  listItems[i] = string.format('[[%s]]', shortcut)  end  table.insert(listItems, options.msg)   -- Return an error if we have nothing to display  if #listItems < 1 then  local msg = cfg['no-content-error']  msg = string.format('<strong class="error">%s</strong>', msg)  if isCategorized and cfg['no-content-error-category'] then  msg = msg .. makeCategoryLink(cfg['no-content-error-category'])  end  return msg  end   local root = mw.html.create()   -- Anchors  local anchorDiv = root  :tag('div')  :css('position', 'relative')  :css('top', '-3em')  for i, shortcut in ipairs(shortcuts) do  local anchor = mw.uri.anchorEncode(shortcut)  anchorDiv:tag('span'):attr('id', anchor)  end   root:newline() -- To match the old [[Template:Shortcut]]   -- Shortcut heading  local shortcutHeading  do  local nShortcuts = #shortcuts  if nShortcuts > 0 then  shortcutHeading = message(cfg['shortcut-heading'], nShortcuts)  shortcutHeading = frame:preprocess(shortcutHeading)  shortcutHeading = shortcutHeading .. '\n'  end  end   -- Shortcut box  local shortcutList = root  :tag('table')  :addClass('shortcutbox noprint')  :css('float', 'right')  :css('border', '1px solid #aaa')  :css('background', '#fff')  :css('margin', '.3em .3em .3em 1em')  :css('padding', '3px')  :css('text-align', 'center')  :tag('tr')  :tag('th')  :addClass('plainlist')  :css('border', 'none')  :css('background', 'transparent')  :tag('small')  :wikitext(shortcutHeading)  :tag('ul')  for i, item in ipairs(listItems) do  shortcutList:tag('li'):wikitext(item)  end   -- Output an error category if the first shortcut doesn't exist  if isCategorized  and shortcuts[1]  and cfg['first-parameter-error-category']  then  local title = mw.title.new(shortcuts[1])  if not title or not title.exists then  root:wikitext(makeCategoryLink(cfg['first-parameter-error-category']))  end  end   return tostring(root) end  function p.main(frame)  local args = require('Module:Arguments').getArgs(frame, {  wrappers = 'แม่แบบ:เว็บย่อ'  })   -- Separate shortcuts from options  local shortcuts, options = {}, {}  for k, v in pairs(args) do  if type(k) == 'number' then  shortcuts[k] = v  else  options[k] = v  end  end   -- Compress the shortcut array, which may contain nils.  local function compressArray(t)  local nums, ret = {}, {}  for k in pairs(t) do  nums[#nums + 1] = k  end  table.sort(nums)  for i, num in ipairs(nums) do  ret[i] = t[num]  end  return ret  end  shortcuts = compressArray(shortcuts)   return p._main(shortcuts, options, frame) end  return p