+=head2 tz
+
+ C4::Context->tz
+
+ Returns a DateTime::TimeZone object for the system timezone
+
+=cut
+
+sub tz {
+ my $self = shift;
+ if (!defined $context->{tz}) {
+ $context->{tz} = DateTime::TimeZone->new(name => 'local');
+ }
+ return $context->{tz};
+}
+
+
+=head2 IsSuperLibrarian
+
+ C4::Context->IsSuperlibrarian();
+
+=cut
+
+sub IsSuperLibrarian {
+ my $userenv = C4::Context->userenv;
+
+ unless ( $userenv and exists $userenv->{flags} ) {
+ # If we reach this without a user environment,
+ # assume that we're running from a command-line script,
+ # and act as a superlibrarian.
+ carp("C4::Context->userenv not defined!");
+ return 1;
+ }
+
+ return ($userenv->{flags}//0) % 2;
+}
+
+=head2 interface
+
+Sets the current interface for later retrieval in any Perl module
+
+ C4::Context->interface('opac');
+ C4::Context->interface('intranet');
+ my $interface = C4::Context->interface;
+
+=cut
+
+sub interface {
+ my ($class, $interface) = @_;
+
+ if (defined $interface) {
+ $interface = lc $interface;
+ if ($interface eq 'opac' || $interface eq 'intranet') {
+ $context->{interface} = $interface;
+ } else {
+ warn "invalid interface : '$interface'";
+ }
+ }
+
+ return $context->{interface} // 'opac';
+}
+