Module:Shortcut

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Revision as of 04:03, 4 February 2015 by Tito Dutta (talk | contribs) (test)
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Documentation for this module may be created at Module:Shortcut/doc

-- This module implements {{shortcut}}.

local cfg = {}

--------------------------------------------------------------------------------
-- Configuration
--------------------------------------------------------------------------------

-- Name for the error category produced if the first shortcut is not an existing
-- page on the wiki.
cfg.errorCategory = 'Wikipedia shortcut box first parameter needs fixing'

-- The header text for the list of shortcuts.
-- cfg.shortcutHeaderSingular will be displayed if there is one shortcut, and
-- cfg.shortcutHeaderPlural will be displayed if there are multiple shortcuts.
cfg.shortcutHeaderSingular = '[[Wikipedia:Shortcut|Shortcut]]:'
cfg.shortcutHeaderPlural = '[[Wikipedia:Shortcut|Shortcuts]]:'

--------------------------------------------------------------------------------
-- Load external modules and define often-used functions
--------------------------------------------------------------------------------

-- Load external modules
local mArguments = require('Module:Arguments')
local mTableTools = require('Module:TableTools')
local mList = require('Module:List')

-- Define often-used functions
local anchorEncode = mw.uri.anchorEncode
local format = string.format
local fullUrl = mw.uri.fullUrl

--------------------------------------------------------------------------------
-- Main functions
--------------------------------------------------------------------------------

local p = {}

function p.main(frame)
	local args = mArguments.getArgs(frame)
	return p._main(args)
end

function p._main(args)
	local shortcuts = p.getShortcuts(args)
	local nShortcuts = #shortcuts
	if nShortcuts < 1 then
		-- Don't output anything if {{shortcut}} was called with no arguments.
		return ''
	end
	local anchors = p.makeAnchorList(shortcuts)
	local shortcutList = p.makeShortcutList(shortcuts)
	local errorCategories = p.getErrorCategories(shortcuts)
	return p.export(anchors, nShortcuts, shortcutList, errorCategories)
end

function p.getShortcuts(args)
	local shortcuts = mTableTools.compressSparseArray(args)
	return shortcuts
end

function p.makeAnchorList(shortcuts)
	local makeAnchor = p.makeAnchor
	local anchors = {}
	for i, shortcut in ipairs(shortcuts) do
		anchors[#anchors + 1] = makeAnchor(shortcut)
	end
	return table.concat(anchors)
end

function p.makeAnchor(s)
	s = anchorEncode(s)
	local anchor = format('<span id="%s"></span>', s)
	return anchor
end

function p.makeShortcutList(shortcuts)
	local makeShortcutLink = p.makeShortcutLink
	local listArgs = {}
	for i, shortcut in ipairs(shortcuts) do
		local link = makeShortcutLink(shortcut)
		listArgs[#listArgs + 1] = link
	end
	listArgs.class = 'plainlinks'
	return mList.makeList('bulleted', listArgs)
end

function p.makeShortcutLink(s)
	local uriObj = fullUrl(s, {redirect = 'no'})
	local url = tostring(uriObj)
	return format('[%s %s]', url, s)
end

function p.getErrorCategories(shortcuts)
	local shortcut1 = shortcuts[1]
	local title = mw.title.new(shortcut1)
	if not title or not title.exists then
		local categoryNsName = mw.site.namespaces[14].name
		return format('[[%s:%s]]', categoryNsName, cfg.errorCategory)
	else
		return nil
	end
end

function p.export(anchors, nShortcuts, shortcutList, errorCategories)
	local root = mw.html.create('')
	root
		:tag('div')
			:css{position = 'relative', top = '-3em'}
			:wikitext(anchors)
	root
		:tag('table')
			:addClass('shortcutbox noprint')
			:css{
				float = 'right',
				border = '1px solid #aaa',
				background = '#fff',
				margin = '.3em .3em .3em 1em',
				padding = '3px',
				['text-align'] = 'center'
			}
			:tag('tr')
				:tag('th')
					:addClass('plainlist')
					:css{border = 'none', background = 'transparent'}
					:tag('small')
						:wikitext(
							nShortcuts <= 1 
							and cfg.shortcutHeaderSingular
							or cfg.shortcutHeaderPlural
						)
						:newline()
						:wikitext(shortcutList)
	root:wikitext(errorCategories)
	return tostring(root)
end

return p