1 local dataforms = require "prosody.util.dataforms";

     2 

     3 local server_info_config = module:get_option("server_info", {});

     4 local server_info_custom_fields = module:get_option_array("server_info_extensions");

     5 

     6 -- Source: http://xmpp.org/registrar/formtypes.html#http:--jabber.org-network-serverinfo

     7 local form_layout = dataforms.new({

     8 	{ var = "FORM_TYPE"; type = "hidden"; value = "http://jabber.org/network/serverinfo" };

     9 });

    10 

    11 if server_info_custom_fields then

    12 	for _, field in ipairs(server_info_custom_fields) do

    13 		table.insert(form_layout, field);

    14 	end

    15 end

    16 

    17 local generated_form;

    18 

    19 function update_form()

    20 	local new_form = form_layout:form(server_info_config, "result");

    21 	if generated_form then

    22 		module:remove_item("extension", generated_form);

    23 	end

    24 	generated_form = new_form;

    25 	module:add_item("extension", generated_form);

    26 end

    27 

    28 function add_fields(event)

    29 	local fields = event.item;

    30 	for _, field in ipairs(fields) do

    31 		table.insert(form_layout, field);

    32 	end

    33 	update_form();

    34 end

    35 

    36 function remove_fields(event)

    37 	local removed_fields = event.item;

    38 	for _, removed_field in ipairs(removed_fields) do

    39 		local removed_var = removed_field.var or removed_field.name;

    40 		for i, field in ipairs(form_layout) do

    41 			local var = field.var or field.name

    42 			if var == removed_var then

    43 				table.remove(form_layout, i);

    44 				break;

    45 			end

    46 		end

    47 	end

    48 	update_form();

    49 end

    50 

    51 module:handle_items("server-info-fields", add_fields, remove_fields);

    52 

    53 function module.load()

    54 	update_form();

    55 end