Module:If preview

Dis module dey implement {{if preview}} and {{preview warning}}. E dey help templates and modules know whether dem dey show dem for preview mode.

If you dey work inside another template, e better make you use the template versions instead.

If you dey use dis inside one module and you want use main(), you for pass one frame table wey get one args table inside.

For the preview warning, use _warning().

---

local p = {}

local cfg = mw.loadData('Module:If preview/configuration')

--[[
main

This function returns either the first argument or second argument passed to
this module, depending on whether the page is being previewed.

]]
function p.main(frame)
	if cfg.preview then
		return frame.args[1] or ''
	else
		return frame.args[2] or ''
	end
end

--[[
pmain

This function returns either the first argument or second argument passed to
this module's parent (i.e. template using this module), depending on whether it
is being previewed.

]]
function p.pmain(frame)
	return p.main(frame:getParent())
end


local function warning_text(warning)
	return mw.ustring.format(
		cfg.warning_infrastructure,
		cfg.templatestyles,
		warning
	)
end

function p._warning(args)
	
	local warning = args[1] and args[1]:match('^%s*(.-)%s*$') or ''
	if warning == '' then
		return warning_text(cfg.missing_warning)
	end
	
	if not cfg.preview then return '' end
	
	return warning_text(warning)
end

--[[
warning

This function returns a "preview warning", which is the first argument marked
up with HTML and some supporting text, depending on whether the page is being previewed.

disabled since we'll implement the template version in general

]]
--function p.warning(frame)
--	return p._warning(frame.args)
--end

--[[
warning, but for pass-through templates like {{preview warning}}
]]
function p.pwarning(frame)
	return p._warning(frame:getParent().args)
end

return p