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|
#-*- perl -*-
# Copyright (C) 2000 Ken'ichi Fukamachi
#
# $Id$
# $FML$ # ����: cvs �Υ����� $FML$ �ˤ���
#
package FML::Config;
use vars qw(%_fml_config);
use strict;
use Carp;
sub new
{
my ($self) = @_;
my $me = \%_fml_config;
return bless $me, $self;
}
sub dump_variables
{
my ($k, $v);
while (($k, $v) = each %_fml_config) {
print "${k}: $v\n";
}
}
sub _log
{
my ($self, $msg) = @_;
$self->{ _error_message } = $msg;
}
sub error
{
my ($self) = @_;
$self->{ _error_message };
}
sub get
{
my ($self, $key) = @_;
$self->{ $key };
}
sub set
{
my ($self, $key, $value) = @_;
$self->{ $key } = $value;
}
sub overload
{
my ($self, $file) = @_;
$self->load_file($file);
}
sub load_file
{
my ($self, $file) = @_;
my (@_fml_config) = ();
# open the $file by using FileHandle.pm
use FileHandle;
my $fh = new FileHandle $file;
if (defined $fh) {
my ($key, $value, $comment);
while (<$fh>) {
# end of postfix format
last if /^=cut/;
# here we go
chop;
# reset { key => value }
if (/^\s*$/) {
if ($key) {
$_fml_config{$key} = $value;
}
undef $key; undef $value; undef $comment;
}
# ignore special keywords of pod formats
next if /^=/;
if (/^([A-Za-z]\w+)\s+=\s*(.*)/) {
($key, $value) = ($1, $2);
# record the keyword order
push(@_fml_config, $key);
}
elsif (/^\s+(.*)/ && $key) {
$value .= " ".$1;
}
else {
$comment .= $_;
}
}
$fh->close;
}
else {
$self->_log("Error: cannot open $file");
}
# expand variable name e.g. $dir/xxx -> /var/spool/ml/elena/xxx
_expand_variables( \%_fml_config , \@_fml_config );
}
sub _expand_variables
{
my ($config, $order) = @_;
my $max = 0;
my $org = '';
# expand $xxx style variables
no strict 'refs';
for my $x ( @$order ) { $$x = $config->{ $x };}
KEY:
for my $x ( @$order ) {
next KEY unless $config->{ $x } =~ /\$/o;
$max = 0;
# we need a loop to expand nested variables, for example,
# a = $x/y and b = $a/c/0
EXPAND_LOOP:
while ($max++ < 16) {
$org = $config->{ $x };
$config->{ $x } =~ s/\$([a-z_]+)/${$1}/g;
last EXPAND_LOOP if $org eq $config->{ $x };
}
}
}
sub yes
{
my ($self, $key) = @_;
$_fml_config{$key} eq 'yes' ? 1 : 0;
}
sub no
{
my ($self, $key) = @_;
$_fml_config{$key} eq 'no' ? 1 : 0;
}
sub FETCH
{
my ($self, $key) = @_;
return $_fml_config{$key};
}
sub STORE
{
my ($self, $key, $value) = @_;
$_fml_config{$key} = $value;
}
sub DELETE
{
my ($self, $key) = @_;
delete $_fml_config{$key};
}
sub CLEAR
{
my ($self) = @_;
undef %_fml_config;
}
=head1 NAME
FML::Config -- fml5 configuration holding object
=head1 SYNOPSIS
$config = new FML::Config;
# get the current value
$config->{recipient_maps};
# set the new value
$config->{recipient_maps} = 'mysql:toymodel';
# function style to get/set the value for the key "recipient_maps"
$config->get('recipient_maps');
$config->set('recipient_maps', 'mysql:toymodel');
=head1 DESCRIPTION
=head1 METHOD
=item Init( ref_to_curproc )
special method only used in the initialization phase.
This method binds $curproc and the %_fml_config memory area.
=item load_file( filename )
read the configuration file, split key and value and set them to
%_fml_config.
=item get( key )
=item set( key, value )
=item dump_variables()
show all {key => value} for debug.
=head1 DATA STRUCTURE
C<%CurProc> holds the CURrent PROCess information.
The hash holds several references to other data structures,
which are mainly hashes.
$CurProc = {
# configurations
config => {
key => value,
},
# emulator mode though fml mode in fact
emulator => $emulator,
# struct incoming_mail holds the mail input from STDIN.
incoming_mail => $r_msg,
article => $r_msg,
};
We use r_variable_name syntax where "r_" implies "reference to" here.
C<$r_msg> is the reference to "struct message".
$r_msg = {
r_header => \$header,
r_body => \$body,
info => {
mime-version => 1.0,
content-type => {
charset => ISO-2022-JP,
},
size => $size,
},
};
where $header is the object returned by Mail::Header class (CPAN
module) and the $body is the reference to the mail body region on
memory which locates within FML::Parse name space.
=cut
1;
|
