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