Module:Nav

local p = {}
function core(list, page, r_position)
    require('Module:list');
    processList = getListOfChaptersFromText(list);
    current = -1;
    i=0;
    for i=0, #processList do
        if page == processList[i] then
            current = i;
		    break;
	    end
    end
   if current == -1 then
        result = page;
    else 
        result = processList[current + r_position ];
    end        
    return result;
end
function p.nav(frame)
    list = frame:preprocess('{{:'..frame.args['list']..'}}');
    page = frame.args['page'];
    r_position = frame.args['relative-position'];
   return core(list, page, r_position);
end
return p;