# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1368091164 -3600
# Node ID 9c88960b0f811cbbe727bb82ccc83293e5e839df
# Parent  591590de34ef6469f5f09d2665e1a1330f7cde71
mod_auto_activate_hosts: Automatically activate and deactivate hosts when they are added/removed from the config

diff -r 591590de34ef -r 9c88960b0f81 mod_auto_activate_hosts/mod_auto_activate_hosts.lua
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_auto_activate_hosts/mod_auto_activate_hosts.lua	Thu May 09 10:19:24 2013 +0100
@@ -0,0 +1,37 @@
+module:set_global();
+
+local array = require "util.array";
+local set = require "util.set";
+local it = require "util.iterators";
+local config = require "core.configmanager";
+
+local function host_not_global(host)
+	return host ~= "*";
+end
+
+local function host_is_enabled(host)
+	return config.get(host, "enabled") ~= false;
+end
+
+function handle_reload()
+	local new_config = config.getconfig();
+	local active_hosts = set.new(array.collect(it.keys(prosody.hosts)):filter(host_not_global));
+	local enabled_hosts = set.new(array.collect(it.keys(new_config)):filter(host_is_enabled));
+	local need_to_activate = enabled_hosts - active_hosts;
+	local need_to_deactivate = active_hosts - enabled_hosts;
+	
+	module:log("debug", "Config reloaded... %d hosts need activating, and %d hosts need deactivating", it.count(need_to_activate), it.count(need_to_deactivate));
+	module:log("debug", "There are %d enabled and %d active hosts", it.count(enabled_hosts), it.count(active_hosts));	
+	for host in need_to_deactivate do
+		hostmanager.deactivate(host);
+	end
+	
+	-- If the lazy loader is loaded, hosts will get activated when they are needed
+	if not(getmetatable(prosody.hosts) and getmetatable(prosody.hosts).lazy_loader) then
+		for host in need_to_activate do
+			hostmanager.activate(host);
+		end
+	end
+end
+
+module:hook_global("config-reloaded", handle_reload);