modify a few definitions and files for the preparation of Ticket::** class

create FML::SequenceFile to increment id

1 files changed, 109 insertions, 0 deletions

diff --git a/fml/lib/FML/SequenceFile.pm b/fml/lib/FML/SequenceFile.pm
new file mode 100644
index 00000000..01b4a696
--- /dev/null
+++ b/fml/lib/FML/SequenceFile.pm
@@ -0,0 +1,109 @@
+#-*- perl -*-
+#
+#  Copyright (C) 2001 Ken'ichi Fukamachi
+#   All rights reserved. This program is free software; you can
+#   redistribute it and/or modify it under the same terms as Perl itself. 
+#
+# $Id$
+# $FML$
+#
+
+package FML::SequenceFile;
+use strict;
+use vars qw(@ISA @EXPORT @EXPORT_OK);
+use Carp;
+
+require Exporter;
+@ISA = qw(Exporter);
+
+
+sub new
+{
+    my ($self, $args) = @_;
+    my ($type) = ref($self) || $self;
+    my $me     = {};
+    $me->{ _sequence_file } = $args->{ sequence_file };
+    return bless $me, $type;
+}
+
+
+sub increment_id
+{
+    my ($self, $file) = @_;
+    my $id = 0;
+    my $seq_file = $file || $self->{ _sequence_file };
+
+    unless ($seq_file) {
+	$self->error_is_why("the sequence file is not specified");
+	return 0;
+    };
+
+    use IO::File::Atomic;
+    my ($rh, $wh) = IO::File::Atomic->rw_open($seq_file);
+
+    # read the current sequence number
+    if (defined $rh) {
+	$id = $rh->getline;
+	$rh->close;
+    }
+    else {
+	$self->error_is_why("cannot open the sequence file");
+	return 0;
+    }
+
+    # increment $id. The incremented number is the current article ID.
+    $id++;
+
+    # save $id
+    print $wh $id, "\n";
+    $wh->close;
+
+    $id;
+}
+
+
+sub error
+{
+    my ($self) = @_;
+    return $self->{ _error };
+}
+
+
+sub error_is_why
+{
+    my ($self, $msg) = @_;
+    $self->{ _error } = $msg;
+}
+
+
+=head1 NAME
+
+FML::SequenceFile.pm - what is this
+
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+=head2 new
+
+=item Function()
+
+
+=head1 AUTHOR
+
+=head1 COPYRIGHT
+
+Copyright (C) 2001 __YOUR_NAME__
+
+All rights reserved. This program is free software; you can
+redistribute it and/or modify it under the same terms as Perl itself. 
+
+=head1 HISTORY
+
+FML::SequenceFile.pm appeared in fml5.
+
+=cut
+
+
+1;