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mod_captcha_registration/util/dataforms.lua @ 5516:f25df3af02c1

mod_client_management: Include client software version number in listing Should you ever wish to revoke a client by version number, e.g. for security reasons affecting certain versions, then it would be good to at the very least see which version is used. Also includes the OAuth2 software ID, an optional unique identifier that should be the same for all installations of a particular software.
author Kim Alvefur <zash@zash.se>
date Sat, 03 Jun 2023 19:21:39 +0200
parent 1373:985bfc6e8cad
line wrap: on
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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- 
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local setmetatable = setmetatable;
local pairs, ipairs = pairs, ipairs;
local tostring, type, next = tostring, type, next;
local t_concat = table.concat;
local st = require "util.stanza";
local jid_prep = require "util.jid".prep;

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

function form_t.form(layout, data, formtype)
	local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
	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 and data[field.name]) or field.value;
		
		if value then
			-- Add value, depending on type
			if field_type == "hidden" then
				if type(value) == "table" then
					-- Assume an XML snippet
					form:tag("value")
						:add_child(value)
						:up();
				else
					form:tag("value"):text(tostring(value)):up();
				end
			elseif field_type == "boolean" then
				form:tag("value"):text((value and "1") or "0"):up();
			elseif field_type == "fixed" then
				form:tag("value"):text(value):up();
			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
			elseif field_type == "list-single" then
				local has_default = false;
				for _, val in ipairs(value) do
					if type(val) == "table" then
						form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
						if val.default and (not has_default) then
							form:tag("value"):text(val.value):up();
							has_default = true;
						end
					else
						form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
					end
				end
			elseif field_type == "list-multi" then
				for _, val in ipairs(value) do
					if type(val) == "table" then
						form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
						if val.default then
							form:tag("value"):text(val.value):up();
						end
					else
						form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
					end
				end
			elseif field_type == "media" then
				form:tag("media", { xmlns = "urn:xmpp:media-element" });
				for _, val in ipairs(value) do
					form:tag("uri", { type = val.type }):text(val.uri):up()
				end
				form:up();
			end
		end
		
		if field.required then
			form:tag("required"):up();
		end
		
		-- Jump back up to list of fields
		form:up();
	end
	return form;
end

local field_readers = {};

function form_t.data(layout, stanza)
	local data = {};
	local errors = {};

	for _, field in ipairs(layout) do
		local tag;
		for field_tag in stanza:childtags() do
			if field.name == field_tag.attr.var then
				tag = field_tag;
				break;
			end
		end

		if not tag then
			if field.required then
				errors[field.name] = "Required value missing";
			end
		else
			local reader = field_readers[field.type];
			if reader then
				data[field.name], errors[field.name] = reader(tag, field.required);
			end
		end
	end
	if next(errors) then
		return data, errors;
	end
	return data;
end

field_readers["text-single"] =
	function (field_tag, required)
		local data = field_tag:get_child_text("value");
		if data and #data > 0 then
			return data
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["text-private"] =
	field_readers["text-single"];

field_readers["jid-single"] =
	function (field_tag, required)
		local raw_data = field_tag:get_child_text("value")
		local data = jid_prep(raw_data);
		if data and #data > 0 then
			return data
		elseif raw_data then
			return nil, "Invalid JID: " .. raw_data;
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["jid-multi"] =
	function (field_tag, required)
		local result = {};
		local err = {};
		for value_tag in field_tag:childtags("value") do
			local raw_value = value_tag:get_text();
			local value = jid_prep(raw_value);
			result[#result+1] = value;
			if raw_value and not value then
				err[#err+1] = ("Invalid JID: " .. raw_value);
			end
		end
		if #result > 0 then
			return result, (#err > 0 and t_concat(err, "\n") or nil);
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["list-multi"] =
	function (field_tag, required)
		local result = {};
		for value in field_tag:childtags("value") do
			result[#result+1] = value:get_text();
		end
		if #result > 0 then
			return result;
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["text-multi"] =
	function (field_tag, required)
		local data, err = field_readers["list-multi"](field_tag, required);
		if data then
			data = t_concat(data, "\n");
		end
		return data, err;
	end

field_readers["list-single"] =
	field_readers["text-single"];

local boolean_values = {
	["1"] = true, ["true"] = true,
	["0"] = false, ["false"] = false,
};

field_readers["boolean"] =
	function (field_tag, required)
		local raw_value = field_tag:get_child_text("value");
		local value = boolean_values[raw_value ~= nil and raw_value];
		if value ~= nil then
			return value;
		elseif raw_value then
			return nil, "Invalid boolean representation";
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["hidden"] =
	function (field_tag)
		return field_tag:get_child_text("value");
	end

field_readers["media"] = field_readers["text-single"]

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 };
}


--]=]