-- Copyright (C) 2009 Thilo Cestonaro

-- 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 = require "util.stanza";

local is_admin = require "core.usermanager".is_admin;

local adhoc_handle_cmd = module:require "adhoc".handle_cmd;

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

local xmlns_disco = "http://jabber.org/protocol/disco";

local commands = {};

module:add_feature(xmlns_cmd);

module:hook("iq/host/"..xmlns_disco.."#info:query", function (event)

	local origin, stanza = event.origin, event.stanza;

	local node = stanza.tags[1].attr.node;

	if stanza.attr.type == "get" and node then

		if commands[node] then

			-- Required for Prosody <= 0.7

			local privileged = is_admin(stanza.attr.from)

			    or is_admin(stanza.attr.from, stanza.attr.to);

			if (commands[node].permission == "admin" and privileged)

			    or (commands[node].permission == "user") then

				reply = st.reply(stanza);

				reply:tag("query", { xmlns = xmlns_disco.."#info",

				    node = node });

				reply:tag("identity", { name = commands[node].name,

				    category = "automation", type = "command-node" }):up();

				reply:tag("feature", { var = xmlns_cmd }):up();

				reply:tag("feature", { var = "jabber:x:data" }):up();

			else

				reply = st.error_reply(stanza, "auth", "forbidden", "This item is not available to you");

			end

			origin.send(reply);

			return true;

		elseif node == xmlns_cmd then

			reply = st.reply(stanza);

			reply:tag("query", { xmlns = xmlns_disco.."#info",

			    node = node });

			reply:tag("identity", { name = "Ad-Hoc Commands",

			    category = "automation", type = "command-list" }):up();

			origin.send(reply);

			return true;

		end

	end

end);

module:hook("iq/host/"..xmlns_disco.."#items:query", function (event)

	local origin, stanza = event.origin, event.stanza;

	if stanza.attr.type == "get" and stanza.tags[1].attr.node

	    and stanza.tags[1].attr.node == xmlns_cmd then

		-- Required for Prosody <= 0.7

		local privileged = is_admin(stanza.attr.from)

		    or is_admin(stanza.attr.from, stanza.attr.to);

		reply = st.reply(stanza);

		reply:tag("query", { xmlns = xmlns_disco.."#items",

		    node = xmlns_cmd });

		for node, command in pairs(commands) do

			if (command.permission == "admin" and privileged)

			    or (command.permission == "user") then

				reply:tag("item", { name = command.name,

				    node = node, jid = module:get_host() });

				reply:up();

			end

		end

		origin.send(reply);

		return true;

	end

end, 500);

module:hook("iq/host/"..xmlns_cmd..":command", function (event)

	local origin, stanza = event.origin, event.stanza;

	if stanza.attr.type == "set" then

		local node = stanza.tags[1].attr.node

		if commands[node] then

			-- Required for Prosody <= 0.7

			local privileged = is_admin(event.stanza.attr.from)

			    or is_admin(stanza.attr.from, stanza.attr.to);

			if commands[node].permission == "admin"

			    and not privileged then

				origin.send(st.error_reply(stanza, "auth", "forbidden", "You don't have permission to execute this command"):up()

				    :add_child(commands[node]:cmdtag("canceled")

					:tag("note", {type="error"}):text("You don't have permission to execute this command")));

				return true

			end

			-- User has permission now execute the command

			return adhoc_handle_cmd(commands[node], origin, stanza);

		end

	end

end, 500);

local function handle_item_added(item)

	commands[item.node] = item;

end

module:hook("item-added/adhoc", function (event)

	return handle_item_added(event.item);

end, 500);

module:hook("item-removed/adhoc", function (event)

	commands[event.item.node] = nil;

end, 500);

-- Pick up any items that are already added

for _, item in ipairs(module:get_host_items("adhoc")) do

	handle_item_added(item);

end