local setmetatable = setmetatable;

local pairs, ipairs = pairs, ipairs;

local st = require "util.stanza";

module "dataforms"

local xmlns_forms = 'jabber:x:data';

local form_t = {};

local form_mt = { __index = form_t };

function new(layout)

	return setmetatable(layout, form_mt);

end

local form_x_attr = { xmlns = xmlns_forms };

function form_t.form(layout, data)

	local form = st.stanza("x", form_x_attr);

	if layout.title then

		form:tag("title"):text(layout.title):up();

	end

	if layout.instructions then

		form:tag("instructions"):text(layout.instructions):up();

	end

	for n, field in ipairs(layout) do

		local field_type = field.type or "text-single";

		-- Add field tag

		form:tag("field", { type = field_type, var = field.name, label = field.label });

		local value = data[field.name];

		-- Add value, depending on type

		if field_type == "hidden" then

			if type(value) == "table" then

				-- Assume an XML snippet

				form:add_child(value);

			elseif value then

				form:text(tostring(value));

			end

		elseif field_type == "boolean" then

			form:tag("value"):text((value and "1") or "0");

		elseif field_type == "fixed" then

		elseif field_type == "jid-multi" then

			for _, jid in ipairs(value) do

				form:tag("value"):text(jid):up();

			end

		elseif field_type == "jid-single" then

			form:tag("value"):text(value):up();

		elseif field_type == "text-single" or field_type == "text-private" then

			form:tag("value"):text(value):up();

		elseif field_type == "text-multi" then

			-- Split into multiple <value> tags, one for each line

			for line in value:gmatch("([^\r\n]+)\r?\n*") do

				form:tag("value"):text(line):up();

			end

		end

		-- Jump back up to list of fields

		form:up();

	end

	return form;

end

function form_t.data(layout, stanza)

end

return _M;

--[=[

Layout:

{

	title = "MUC Configuration",

	instructions = [[Use this form to configure options for this MUC room.]],

	{ name = "FORM_TYPE", type = "hidden", required = true };

	{ name = "field-name", type = "field-type", required = false };

}

--]=]