-- Prosody IM

-- Copyright (C) 2008-2009 Matthew Wild

-- Copyright (C) 2008-2009 Waqas Hussain

-- Copyright (C) 2009 Thilo Cestonaro

-- 

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

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

--

local prosody = prosody;

local helpers = require "util/helpers";

local st = require "util.stanza";

local datamanager = require "util.datamanager";

local privacy_lists = nil

local bare_sessions = bare_sessions;

function findNamedList (name)

	local ret = nil

	if privacy_lists.lists == nil then return nil; end

	for i=1, #privacy_lists.lists do

		if privacy_lists.lists[i].name == name then

			ret = i;

			break;

		end

	end

	return ret;

end

function declineList (origin, stanza, which)

	module:log("info", "User requests to decline the use of privacy list: %s", which);

	privacy_lists[which] = nil;

	origin.send(st.reply(stanza));

	return true;

end

function activateList (origin, stanza, which, name)

	module:log("info", "User requests to change the privacy list: %s, to be list named %s", which, name);

	local ret = false;

	local idx = findNamedList(name);

	if privacy_lists[which] == nil then

		privacy_lists[which] = "";

	end

	if privacy_lists[which] ~= name and idx ~= nil then

		privacy_lists[which] = name;

		origin.send(st.reply(stanza));

		ret = true;

	end

	return ret;

end

function deleteList (origin, stanza, name)

	module:log("info", "User requests to delete privacy list: %s", name);

	local ret = false;

	local idx = findNamedList(name);

	if idx ~= nil then

		table.remove(privacy_lists.lists, idx);

		origin.send(st.reply(stanza));

		ret = true;

	end

	return ret;

end

function createOrReplaceList (origin, stanza, name, entries)

	module:log("info", "User requests to create / replace list named %s, item count: %d", name, #entries);

	local ret = true;

	local idx = findNamedList(name);

	local bare_jid = origin.username.."@"..origin.host;

	if privacy_lists.lists == nil then

		privacy_lists.lists = {};

	end

	if idx == nil then

		idx = #privacy_lists.lists + 1;

	end

	local list = {};

	list.name = name;

	list.items = {};

	for _,item in ipairs(entries) do

		tmp = {};

		tmp["type"] = item.attr.type;

		tmp["value"] = item.attr.value;

		tmp["action"] = item.attr.action;

		tmp["order"] = item.attr.order;

		tmp["presence-in"] = false;

		tmp["presence-out"] = false;

		tmp["message"] = false;

		tmp["iq"] = false;

		if #item.tags > 0 then

			for _,tag in ipairs(item.tags) do

				tmp[tag.name] = true;

			end

		end

		list.items[#list.items + 1] = tmp;

	end

	privacy_lists.lists[idx] = list;

	origin.send(st.reply(stanza));

	if bare_sessions[bare_jid] ~= nil then

		iq = st.iq ( { type = "set", id="push1" } );

		iq:tag ("query", { xmlns = "jabber:iq:privacy" } );

		iq:tag ("list", { name = list.name } ):up();

		iq:up();

		for resource, session in pairs(bare_sessions[bare_jid].sessions) do

			iq.attr.to = bare_jid.."/"..resource

			session.send(iq);

		end

	end

	return true;

end

function getList(origin, stanza, name)

	module:log("info", "User requests list named: %s", name or "nil");

	local ret = true;

	local idx = findNamedList(name);

	local reply = st.reply(stanza);

	reply = reply:tag("query", {xmlns="jabber:iq:privacy"});

	if idx == nil then

		reply:tag("active", {name=privacy_lists.active or ""}):up();

		reply:tag("default", {name=privacy_lists.default or ""}):up();

		if privacy_lists.lists then

			for _,list in ipairs(privacy_lists.lists) do

				reply:tag("list", {name=list.name}):up();

			end		

		end

	else

		list = privacy_lists.lists[idx];

		reply = reply:tag("list", {name=list.name});

		for _,item in ipairs(list.items) do

			reply:tag("item", {type=item.type, value=item.value, action=item.action, order=item.order});

			if item["message"] then reply:tag("message"):up(); end

			if item["iq"] then reply:tag("iq"):up(); end

			if item["presence-in"] then reply:tag("presence-in"):up(); end

			if item["presence-out"] then reply:tag("presence-out"):up(); end

			reply:up();

		end

	end

	origin.send(reply);

	return ret;

end

--          "[tagname]/[target-type]/[payload-namespace]:[payload-tagname]"

module:hook("iq/bare/jabber:iq:privacy:query", function(data)

	local origin, stanza = data.origin, data.stanza;

	if stanza.attr.to == nil then -- only service requests to own bare JID

		local query = stanza.tags[1]; -- the query element

		local valid = false;

		privacy_lists = datamanager.load(origin.username, origin.host, "privacy") or {};

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

			if #query.tags >= 1 then

				for _,tag in ipairs(query.tags) do

					if tag.name == "active" or tag.name == "default" then

						if tag.attr.name == nil then -- Client declines the use of active / default list

							valid = declineList(origin, stanza, tag.name);

						else -- Client requests change of active / default list

							valid = activateList(origin, stanza, tag.name, tag.attr.name);

						end

					elseif tag.name == "list" and tag.attr.name then -- Client adds / edits a privacy list

						if #tag.tags == 0 then -- Client removes a privacy list

							valid = deleteList(origin, stanza, tag.attr.name);

						else -- Client edits a privacy list

							valid = createOrReplaceList(origin, stanza, tag.attr.name, tag.tags)

						end

					end

				end

			end

		elseif stanza.attr.type == "get" then

			local name = nil;

			if #query.tags >= 1 then

				for _,tag in ipairs(query.tags) do

					if tag.name == "list" then -- Client requests a privacy list from server

						name = tag.attr.name;

						break;

					end

				end

			end

			valid = getList(origin, stanza, name);

		end

		if valid == false then

			origin.send(st.error_reply(stanza, "modify", "bad-request"));

		else

			datamanager.store(origin.username, origin.host, "privacy", privacy_lists);

		end

		return true;

	end

	return false;

end, 500);

function checkIfNeedToBeBlocked(e)

	return false;

end

module:hook("pre-message/full", checkIfNeedToBeBlocked, 500);

module:hook("pre-iq/bare", checkIfNeedToBeBlocked, 500);

module:hook("pre-presence/bare", checkIfNeedToBeBlocked, 500);

-- helpers.log_events(hosts["albastru.de"].events, "albastru.de");

-- helpers.log_events(prosody.events, "*");

module:log("info", "mod_privacy loaded ...");