Module:GetParameters

local p = {}

--[[ Helper function that populates the argument list given that user may need to use a mix of named and unnamed parameters. This is relevant because named parameters are not identical to unnamed parameters due to string trimming, and when dealing with strings we sometimes want to either preserve or remove that whitespace depending on the application. ]] function p.getParameters( frame_args, arg_list )

   local new_args = {};
   local index = 1;
   local value;
   
   for i,arg in ipairs( arg_list ) do
       value = frame_args[arg]
       if value == nil then
           value = frame_args[index];
           index = index + 1;
       end
       new_args[arg] = value;
   end
   
   return new_args;

end

--[[ Helper Function to interpret boolean strings ]] function p.getBoolean( boolean_str )

   local boolean_value;
   
   if type( boolean_str ) == 'string' then
       boolean_str = boolean_str:lower();
       if boolean_str == 'false' or boolean_str == 'no' or boolean_str == '0' 
               or boolean_str ==  then
           boolean_value = false;
       else
           boolean_value = true;
       end    
   elseif type( boolean_str ) == 'boolean' then
       boolean_value = boolean_str;
   else
       error( 'No boolean value found' );
   end    
   return boolean_value

end

function p.defined(frame) local arg = mw.text.trim(frame.args[1]) --if arg == tostring(tonumber(arg)) then -- undesired result for '-0' -- arg = tonumber(arg) --end --if mw.ustring.find(arg, '^%s*-?[1-9][0-9]*%s*$') ~= nil or arg == '0' then -- arg = tonumber(arg) --end if mw.ustring.find(arg, '^-?[1-9][0-9]*$') ~= nil then arg = tonumber(arg) elseif arg == '0' then arg = 0 end return frame:getParent().args[arg] ~= nil end

return p