Module:Utilities

Documentation for this module may be created at Module:Utilities/doc

local Utilities = { }

function Utilities.trim( text )
	if type( text ) == 'string' and text ~= '' then
		text = text:gsub( '^%s*(%S?.-)%s*$', '%1' )
		if text ~= '' then
			return text
		end
	end
	return nil
end

function Utilities.validTextArg( args, name, ... )
	local text = Utilities.trim( args[name] )
	if text then
		return text
	end
	if select( '#', ... ) > 0 then
		return Utilities.validTextArg( args, ... )
	end
	return nil
end

function Utilities.notEmpty( var, ... )
	local text = Utilities.trim( var )
	if text then
		return text
	end

	local tvar = type( var )

	if tvar == 'table' then
		local nextFunc = pairs( var )
		if nextFunc( var ) ~= nil then
			return var
		end
	elseif var == true or ( tvar == 'number' and var ~= 0 ) or tvar == 'function' then
		return var
	end

	if select( '#', ... ) > 0 then
		return Utilities.notEmpty( ... )
	end
end

function Utilities.extractArgs ( frame )
	if type( frame.getParent ) == 'function' then
		local args = frame:getParent().args
		for k,v in pairs( frame.args ) do
			args[k] = v;
		end
		return args
	else
		return frame
	end
end


return Utilities