Arguments

Documentation for this module may be created at ModuleDoc:Arguments
local arguments

function arguments.preprocess( frame, args )
	
	-- TODO: Complete error messages, make sure that in the preprocessed version, the keys for numbered args are still numbered
	
	local parent = frame:getParent()
	
	local valid = {}
	local required = {}
	local recommended = {}
	local deprecated = {}
	
	for i, v in ipairs( args.valid or {} ) do
		local vl = mw.ustring.lower( tostring( v ) )
		valid[ vl ] = true
	end
	for i, v in ipairs( args.required or {} ) do
		local vl = mw.ustring.lower( tostring( v ) )
		valid[ vl ] = true
		required[ vl ] = true
	end
	for i, v in ipairs( args.recommended or {} ) do
		local vl = mw.ustring.lower( tostring( v ) )
		valid[ vl ] = true
		recommended[ vl ] = true
	end
	for i, v in ipairs( args.deprecated or {} ) do
		local vl = mw.ustring.lower( tostring( v ) )
		valid[ vl ] = true
		deprecated[ vl ] = true
	end
	
	for i, v in ipairs( args.valid or {} ) do
		local vl = mw.ustring.lower( tostring( v ) )
		valid[ vl ] = true
	end
	
	local preprocessed = {}
	
	local missingRequired = required
	local missingRecommended = recommended
	local usingDeprecated = {}
	local usingInvalid = {}
	local clobbered = {}
	
	for k, v in pairs( parent.args ) do
		local kl = mw.ustring.lower( k )
		kl =  args.aliases[ kl ] or kl
		missingRequired[ kl ] = nil
		missingRecommended[ kl ] = nil
		if not valid[ kl ] then
			usingInvalid[ kl ] = true
		end
		if deprecated[ kl ] then
			usingDeprecated[ kl ] = true
		end
		preprocessed[ kl ] = v
	end
	for i, v in ipairs( parent.args ) do
		local k = args.aliases[ i ] or i
		missingRequired[ k ] = nil
		missingRecommended[ k ] = nil
		if not valid[ k ] then
			usingInvalid[ k ] = true
		end
		if deprecated[ k ] then
			usingDeprecated[ k ] = true
		end
		preprocessed[ k ] = v
	end
	
	local foundError = false
	local out = ''
	if next( missingRequired ) then
		local missing = ''
		for k, v in pairs( missingRequired ) do
			missing = missing .. ', "' .. k .. '"'
		end
		missing = mw.ustring.sub( missing, 3 )
		out = out .. utils.error(
			'Template missing required fields: ' .. missing,
			'template',
			'Pages containing missing template parameter errors')
	end
	if next( missingRecommended ) then
		local missing = ''
		for k, v in pairs( missingRecommended ) do
			missing = missing .. ', "' .. k .. '"'
		end
		missing = mw.ustring.sub( missing, 3 )
		out = out .. utils.warning(
			'Template missing required fields: ' .. missing,
			'template',
			'Pages containing missing template parameter warnings')
	end
	
	return {
		[ 'args' ] = preprocessed,
		[ 'out' ] = out
	}
end

return arguments
Module:Arguments
