# 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