Module:Babel

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local p = {}

local getArgs

local function showUserbox(frame, v, nocat)
	local maybeNocat = ''
	if nocat then
		maybeNocat = '|nocat=yes'
	end
	return frame:preprocess('{{User ' .. v .. maybeNocat .. '}}')
end

function p.main(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	local args = getArgs(frame, {
		wrappers = 'Template:Babel'
	})
	
	local ret = mw.html.create('table')
		:attr('role', 'presentation')
		:addClass('userboxes')
		:css({
			float = args.align or 'right',
			['margin-left'] = (args.left or '1') .. 'em',
			['margin-bottom'] = (args.bottom or '0') .. 'em',
			width = (args.width or '248') .. 'px',
			clear = args.align or 'right',
			color = args.textcolor or '#000000',
			border = (args.bordercolor or '#99B3FF') .. ' solid ' .. (args.solid or 1) .. 'px'
		})
	
	local nocat = args.nocat and string.lower(args.nocat) == 'yes'
	
	if args.shadow and string.lower(args.shadow) == 'yes' then
		ret:css({
			['box-shadow'] = '0 2px 4px rgb(0, 0, 0, 0.2)'
		})
	end
	
	ret:cssText(args['extra-css'] or '')
	
	local color = args.color or 'inherit'
	local row1 = ret:tag('tr')
	local row2 = ret:tag('tr')
	local row3 = ret:tag('tr')

	local body_cells = row2:tag('td')
		:css('vertical-align', 'middle !important')
	
	local userboxes
	-- Special message for when first argument is blank; otherwise treat it as normal
	if args[1] and args[1]:find('%S') then
		userboxes = showUserbox(frame, args[1], nocat)
	else
		userboxes = args.noboxestext or
			"''You haven't set up any languages. Please see [[:en:Template:Babel/doc|the template's documentation]] for help.''"
	end
	
	body_cells:wikitext(userboxes)
	
	-- "remove" args[1] so it isn't looked at in the loop
	-- table.remove(args,1) doesn't produce desired result
	args[1] = ''
	
	-- Keep track of how many columns are in this table
	local col_span = 1
	for _, v in ipairs(args) do
		-- ! indicates a new cell should be created
		if v:find('%S') and v ~= '!' then
			body_cells:wikitext(showUserbox(frame, v, nocat))
		-- Recycling body_cells for <td>
		elseif v and v == '!' then
			col_span = col_span + 1
			body_cells:done()
			body_cells = row2:tag('td')
		end
	end
	
	row1:tag('th')
		:attr('colspan', col_span)
		:css({
			['background-color'] = color,
			['text-align'] = 'center'
		})
		:wikitext(args.header or '[[:m:User language|User language]]')
		:done()
	
	row3:tag('td')
		:attr('colspan', col_span)
		:css({
			['background-color'] = color,
			['text-align'] = 'center'
		})
		:wikitext(args.footer or '[[:Category:Users by language|Search user languages]]')
		:done()
	
	if args['special-boxes'] then
		body_cells:wikitext(args['special-boxes'])
	end
	
	body_cells:done()
	
	return tostring(ret)
end

return p