-- Copyright (C) 2009-2010 Florian Zeitz

--

-- This file is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local st, uuid = require "util.stanza", require "util.uuid";

local xmlns_cmd = "http://jabber.org/protocol/commands";

local states = {}

local _M = {};

local function _cmdtag(desc, status, sessionid, action)

	local cmd = st.stanza("command", { xmlns = xmlns_cmd, node = desc.node, status = status });

	if sessionid then cmd.attr.sessionid = sessionid; end

	if action then cmd.attr.action = action; end

	return cmd;

end

function _M.new(name, node, handler, permission)

	return { name = name, node = node, handler = handler, cmdtag = _cmdtag, permission = (permission or "user") };

end

function _M.handle_cmd(command, origin, stanza)

	local cmdtag = stanza.tags[1]

	local sessionid = cmdtag.attr.sessionid or uuid.generate();

	local dataIn = {

		to = stanza.attr.to;

		from = stanza.attr.from;

		action = cmdtag.attr.action or "execute";

		form = cmdtag:get_child("x", "jabber:x:data");

	};

	local data, state = command:handler(dataIn, states[sessionid]);

	states[sessionid] = state;

	local cmdreply;

	if data.status == "completed" then

		states[sessionid] = nil;

		cmdreply = command:cmdtag("completed", sessionid);

	elseif data.status == "canceled" then

		states[sessionid] = nil;

		cmdreply = command:cmdtag("canceled", sessionid);

	elseif data.status == "error" then

		states[sessionid] = nil;

		local reply = st.error_reply(stanza, data.error.type, data.error.condition, data.error.message);

		origin.send(reply);

		return true;

	else

		cmdreply = command:cmdtag("executing", sessionid);

		data.actions = data.actions or { "complete" };

	end

	for name, content in pairs(data) do

		if name == "info" then

			cmdreply:tag("note", {type="info"}):text(content):up();

		elseif name == "warn" then

			cmdreply:tag("note", {type="warn"}):text(content):up();

		elseif name == "error" then

			cmdreply:tag("note", {type="error"}):text(content.message):up();

		elseif name == "actions" then

			local actions = st.stanza("actions", { execute = content.default });

			for _, action in ipairs(content) do

				if (action == "prev") or (action == "next") or (action == "complete") then

					actions:tag(action):up();

				else

					module:log("error", "Command %q at node %q provided an invalid action %q",

						command.name, command.node, action);

				end

			end

			cmdreply:add_child(actions);

		elseif name == "form" then

			cmdreply:add_child((content.layout or content):form(content.values));

		elseif name == "result" then

			cmdreply:add_child((content.layout or content):form(content.values, "result"));

		elseif name == "other" then

			cmdreply:add_child(content);

		end

	end

	local reply = st.reply(stanza);

	reply:add_child(cmdreply);

	origin.send(reply);

	return true;

end

return _M;