quick and dirty room membership<->group membership sync script

scripts/sync_room_to_group.pl

@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+use JSON::XS;
+use LWP::UserAgent;
+use URI::Escape;
+
+if (@ARGV < 4) {
+    die "usage: $0 <homeserver url> <access_token> <room_id|room_alias> <group_id>\n";
+}
+
+my ($hs, $access_token, $room_id, $group_id) = @ARGV;
+my $ua = LWP::UserAgent->new();
+$ua->timeout(10);
+
+if ($room_id =~ /^#/) {
+    $room_id = uri_escape($room_id);
+    $room_id = decode_json($ua->get("${hs}/_matrix/client/r0/directory/room/${room_id}?access_token=${access_token}")->decoded_content)->{room_id};
+}
+
+my $room_users  = [ keys %{decode_json($ua->get("${hs}/_matrix/client/r0/rooms/${room_id}/joined_members?access_token=${access_token}")->decoded_content)->{joined}} ];
+my $group_users = [ map { $_->{user_id} } @{decode_json($ua->get("${hs}/_matrix/client/unstable/groups/${group_id}/users?access_token=${access_token}" )->decoded_content)->{chunk}} ];
+
+my $diff = {};
+foreach my $user (@$room_users) { $diff->{$user}++ }
+foreach my $user (@$group_users) { $diff->{$user}-- }
+
+foreach my $user (keys %$diff) {
+    if ($diff->{$user} == 1) {
+        warn "inviting $user";
+        $ua->put("${hs}/_matrix/client/unstable/groups/${group_id}/admin/users/invite/${user}?access_token=${access_token}", Content=>'{}');
+    }
+    elsif ($diff->{$user} == -1) {
+        warn "removing $user";
+        $ua->put("${hs}/_matrix/client/unstable/groups/${group_id}/admin/users/remove/${user}?access_token=${access_token}", Content=>'{}');
+    }
+}