diff -r cf2f66b233d1 -r 2a8bbfcb6868 plugins/muc/request.lib.lua
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/muc/request.lib.lua	Sat Jun 02 20:15:32 2018 +0200
@@ -0,0 +1,122 @@
+-- Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+-- Copyright (C) 2014 Daurnimator
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local st = require "util.stanza";
+local jid_resource = require "util.jid".resource;
+
+local voice_request_form = require "util.dataforms".new({
+	title = "Voice Request";
+	{
+		name = "FORM_TYPE";
+		type = "hidden";
+		value = "http://jabber.org/protocol/muc#request";
+	},
+	{
+		name = "muc#jid";
+		type = "jid-single";
+		label = "User ID";
+	},
+	{
+		name = "muc#roomnick";
+		type = "text-single";
+		label = "Room Nickname";
+	},
+	{
+		name = "muc#role";
+		type = "list-single";
+		label = "Requested Role";
+		value = "participant";
+		options = {
+			"none",
+			"visitor",
+			"participant",
+			"moderator",
+		};
+	},
+	{
+		name = "muc#request_allow";
+		type = "boolean";
+		label = "Grant voice to this person?";
+		value = false;
+	}
+});
+
+local function handle_request(room, origin, stanza, form)
+	local occupant = room:get_occupant_by_real_jid(stanza.attr.from);
+	local fields = voice_request_form:data(form);
+	local event = {
+		room = room;
+		origin = origin;
+		stanza = stanza;
+		fields = fields;
+		occupant = occupant;
+	};
+	if occupant.role == "moderator" then
+		module:log("debug", "%s responded to a voice request in %s", jid_resource(occupant.nick), room.jid);
+		module:fire_event("muc-voice-response", event);
+	else
+		module:log("debug", "%s requested voice in %s", jid_resource(occupant.nick), room.jid);
+		module:fire_event("muc-voice-request", event);
+	end
+end
+
+module:hook("muc-voice-request", function(event)
+	if event.occupant.role == "visitor" then
+		local nick = jid_resource(event.occupant.nick);
+		local formdata = {
+			["muc#jid"] = event.stanza.attr.from;
+			["muc#roomnick"] = nick;
+		};
+
+		local message = st.message({ type = "normal"; from = event.room.jid }):add_child(voice_request_form:form(formdata)):up();
+
+		event.room:broadcast(message, function (_, occupant)
+			return occupant.role == "moderator";
+		end);
+	end
+end);
+
+module:hook("muc-voice-response", function(event)
+	local actor = event.stanza.attr.from;
+	local affected_occupant = event.room:get_occupant_by_real_jid(event.fields["muc#jid"]);
+	local occupant = event.occupant;
+
+	if occupant.role ~= "moderator" then
+		module:log("debug", "%s tried to grant voice but wasn't a moderator", jid_resource(occupant.nick));
+		return;
+	end
+
+	if not event.fields["muc#request_allow"] then
+		module:log("debug", "%s did not grant voice", jid_resource(occupant.nick));
+		return;
+	end
+
+	if not affected_occupant then
+		module:log("debug", "%s tried to grant voice to unknown occupant %s", jid_resource(occupant.nick), event.fields["muc#jid"]);
+		return;
+	end
+
+	if affected_occupant.role ~= "visitor" then
+		module:log("debug", "%s tried to grant voice to %s but they already have it", jid_resource(occupant.nick), jid_resource(occupant.jid));
+		return;
+	end
+
+	module:log("debug", "%s granted voice to %s", jid_resource(event.occupant.nick), jid_resource(occupant.jid));
+	local ok, errtype, err = event.room:set_role(actor, affected_occupant.nick, "participant", "Voice granted");
+
+	if not ok then
+		module:log("debug", "Error granting voice: %s", err or errtype);
+		event.origin.send(st.error_reply(event.stanza, errtype, err));
+	end
+end);
+
+
+return {
+	handle_request = handle_request;
+};