-- luacheck: ignore 212/self

local function new_simple_form(form, result_handler)

	return function(self, data, state)

		if state or data.form then

			if data.action == "cancel" then

				return { status = "canceled" };

			end

			local fields, err = form:data(data.form);

			return result_handler(fields, err, data);

		else

			return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";

		end

	end

end

local function new_initial_data_form(form, initial_data, result_handler)

	return function(self, data, state)

		if state or data.form then

			if data.action == "cancel" then

				return { status = "canceled" };

			end

			local fields, err = form:data(data.form);

			return result_handler(fields, err, data);

		else

			local values, err = initial_data(data);

			if type(err) == "table" then

				return {status = "error"; error = err}

			elseif type(err) == "string" then

				return {status = "error"; error = {type = "cancel"; condition = "internal-server-error", err}}

			end

			return { status = "executing", actions = {"next", "complete", default = "complete"},

				 form = { layout = form, values = values } }, "executing";

		end

	end

end

return { new_simple_form = new_simple_form,

	 new_initial_data_form = new_initial_data_form };