# Module:Shortcut

-- This module implements .  
-- 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, , cfg)
checkType('_main', 1, shortcuts, 'table')
checkType('_main', 2, options, 'table', true)
options = options or {}
= or mw.getCurrentFrame
cfg = cfg or mw.loadData(CONFIG_MODULE)
local templateMode = options.template and yesno(options.template)
local redirectMode = options.redirect and yesno(options.redirect)
local isCategorized = not options.category or 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
local templatePath, prefix
if templateMode then
-- Namespace detection
local titleObj = mw.title.new(shortcut, 10)
if titleObj.namespace == 10 then
templatePath = titleObj.fullText
else
templatePath = shortcut
end
prefix = options['pre' .. i] or options.pre or ''
end
if options.target and yesno(options.target) then
listItems[i] = templateMode
and string.format("&#123;&#123;%s%s&#125;&#125;", prefix, templatePath, shortcut)
or string.format("%s", shortcut)
else
listItems[i] = :expandTemplate{
title = 'No redirect',
args = templateMode and {templatePath, shortcut} or {shortcut, shortcut}
}
if templateMode then
listItems[i] = string.format("&#123;&#123;%s%s&#125;&#125;", prefix, listItems[i])
end
end
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>%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
root:wikitext(:extensionTag{ name = 'templatestyles', args = { src = 'Module:Shortcut/styles.css'} })
-- Anchors
local anchorDiv = root
:tag('div')
:addClass('module-shortcutanchordiv')
for i, shortcut in ipairs(shortcuts) do
local anchor = mw.uri.anchorEncode(shortcut)
anchorDiv:tag('span'):attr('id', anchor)
end  
-- Shortcut heading
local shortcutHeading
do
local nShortcuts = #shortcuts
if nShortcuts > 0 then
local headingMsg = options['shortcut-heading'] or
redirectMode and cfg['redirect-heading'] or
cfg['shortcut-heading']
shortcutHeading = message(headingMsg, nShortcuts)
shortcutHeading = :preprocess(shortcutHeading)
end
end  
-- Shortcut box
local shortcutList = root
:tag('div')
:addClass('module-shortcutboxplain noprint')
:attr('role', 'note')
if options.float and options.float:lower == '' then
shortcutList:addClass('module-shortcutboxleft')
end
if options.clear and options.clear ~= '' then
shortcutList:css('clear', options.clear)
end
if shortcutHeading then
shortcutList
:tag('div')
:addClass('module-shortcutlist')
:wikitext(shortcutHeading)
end  
local ubl = require('Module:List').unbulleted(listItems)
shortcutList:wikitext(ubl)
return tostring(root)
end  
function p.main
local args = require('Module:Arguments').getArgs  
-- 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, )
end  
return p