# HG changeset patch
# User Mikael Berthe <mikael@lilotux.net>
# Date 1422211959 -3600
# Node ID 620cc035ae1e414dea68389f34ca5e5d72d384e9
# Parent  d9f3c66ea9388e831d82a94b01b3b42de000d0e4
mod_admin_message: New IM-based administration console

This module provides a console over XMPP.
All the commands of the mod_admin_telnet module are available to Prosody admins
from an XMPP client.

diff -r d9f3c66ea938 -r 620cc035ae1e mod_admin_message/mod_admin_message.lua
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_admin_message/mod_admin_message.lua	Sun Jan 25 19:52:39 2015 +0100
@@ -0,0 +1,135 @@
+-- Prosody IM
+--
+-- mod_admin_message -- Console-over-XMPP implementation.
+--
+-- This module depends on Prosody's admin_telnet module
+--
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+-- Copyright (C) 2012-2013 Mikael Berthe
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local st = require "util.stanza";
+local um_is_admin = require "core.usermanager".is_admin;
+
+local admin_telnet = module:depends("admin_telnet");
+local telnet_def_env = module:shared("/*/admin_telnet/env");
+local telnet_commands = module:shared("/*/admin_telnet/commands");
+local default_env_mt = { __index = telnet_def_env };
+
+local host = module.host;
+
+-- Create our own session.  print() will store the results in a text
+-- string.  send(), quit(), disconnect() are no-op.
+local function new_session ()
+	local session = {
+			send        = function ()  end;
+			quit        = function ()  end;
+			disconnect  = function ()  end;
+			};
+
+	session.print = function (...)
+		local t = {};
+		for i=1,select("#", ...) do
+			t[i] = tostring(select(i, ...));
+		end
+		local text = "| "..table.concat(t, "\t");
+		if session.fulltext then
+		    session.fulltext = session.fulltext .. "\n" .. text;
+		else
+		    session.fulltext = text;
+		end
+	end
+
+	session.env = setmetatable({}, default_env_mt);
+
+	-- Load up environment with helper objects
+	for name, t in pairs(telnet_def_env) do
+		if type(t) == "table" then
+			session.env[name] = setmetatable({ session = session },
+							 { __index = t });
+		end
+	end
+
+	return session;
+end
+
+local function on_message(event)
+	-- Check the type of the incoming stanza to avoid loops:
+	if event.stanza.attr.type == "error" then
+		return; -- We do not want to reply to these, so leave.
+	end
+
+	local userjid = event.stanza.attr.from;
+	local bodytag = event.stanza:get_child("body");
+	local body = bodytag and bodytag:get_text() or "";
+	if not body or body == "" then
+		-- We do not reply to empty messages (chatstates, etc.)
+		return true;
+	end
+
+	-- Check the requester is an admin user
+	if not um_is_admin(userjid, module.host) then
+		module:log("info", "Ignored request from non-admin: %s",
+			   userjid);
+		return;
+	end
+
+	-- Create a session in order to use an admin_telnet-like environment
+	local session = new_session();
+
+	-- Process the message using admin_telnet's onincoming function
+	admin_telnet.console:process_line(session, body.."\n");
+
+	-- Strip trailing blank line
+	session.fulltext = tostring(session.fulltext):gsub("\n\|%s*$", "")
+
+	-- Send the reply stanza
+	local reply_stanza = st.message({ from = host, to = userjid,
+					type = "chat" });
+	reply_stanza = reply_stanza:body(session.fulltext);
+	module:send(reply_stanza);
+
+	return true;
+end
+
+local function on_presence(event)
+
+	local send_presence = false;
+
+	local userjid = event.stanza.attr.from;
+
+	-- Check the requester is an admin user
+	if not um_is_admin(userjid, module.host) then
+		module:log("info", "Ignored presence from non-admin: %s",
+			   userjid);
+		return;
+	end
+
+	if (event.stanza.attr.type == "subscribe") then
+		module:log("info", "Subscription request from %s", userjid);
+		send_presence = true;
+		-- Send a subscription ack
+		local presence_stanza = st.presence({ from = host,
+					to = userjid, type = "subscribed",
+					id = event.stanza.attr.id });
+		module:send(presence_stanza);
+	elseif (event.stanza.attr.type == "probe") then
+		send_presence = true;
+	elseif (event.stanza.attr.type == "unsubscribe") then
+		-- For information only...
+		module:log("info", "Unsubscription request from %s", userjid);
+	end
+
+	if (send_presence == true) then
+		-- Send a presence stanza
+		module:send(st.presence({ from = host, to = userjid }));
+	end
+	return true;
+end
+
+module:hook("message/bare", on_message);
+module:hook("presence/bare", on_presence);