Message/Field/ValueParams.pm


=head1 NAME

Message::Field::ValueParams --- Perl module for "word; parameter(s)" style
Internet message field bodies

=cut

package Message::Field::ValueParams;
use strict;
use vars qw(@ISA %REG $VERSION);
$VERSION=do{my @r=(q$Revision: 1.5 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
require Message::Field::Params;
push @ISA, qw(Message::Field::Params);

use overload '+=' => sub { $_[0]->{value} = $_[0]->{value} + $_[1]; $_[0] },
             '-=' => sub { $_[0]->{value} = $_[0]->{value} - $_[1]; $_[0] },
             '*=' => sub { $_[0]->{value} = $_[0]->{value} * $_[1]; $_[0] },
             '**=' => sub { $_[0]->{value} = $_[0]->{value} ** $_[1]; $_[0] },
             '/=' => sub { $_[0]->{value} = $_[0]->{value} / $_[1]; $_[0] },
             '%=' => sub { $_[0]->{value} = $_[0]->{value} % $_[1]; $_[0] },
             fallback => 1;

*REG = \%Message::Field::Params::REG;
## Inherited: comment, quoted_string, domain_literal, angle_quoted
        ## WSP, FWS, atext, atext_dot, token, attribute_char
        ## S_encoded_word
        ## M_quoted_string
        ## param, parameter
        ## M_parameter, M_parameter_name, M_parameter_extended_value

=head1 CONSTRUCTORS

The following methods construct new objects:

=over 4

=cut

## Initialize of this class -- called by constructors
sub _init ($;%) {
  my $self = shift;
  my %options = @_;
  my %DEFAULT = (
    #delete_fws ## Inheritted
    #encoding_after_encode      ## Inherited
    #encoding_before_decode     ## Inherited
    #format     ## Inherited
    #hook_encode_string ## Inherited
    #hook_decode_string ## Inherited
    #parameter_name_case_sensible       ## Inherited
    #parameter_value_max_length ## Inherited
    #parse_all  ## Inherited
    #use_parameter_extension    ## Inherited
    -value_case_sensible        => 1,
    -value_default      => '',
    -value_no_regex     => qr/(?!)/,    ## default = (none)
    -value_regex        => qr/[\x00-\xFF]+/,
    #value_type ## Inherited
  );
  $self->SUPER::_init (%DEFAULT, %options);
  
  my $fname = $self->_n11n_field_name ($self->{option}->{field_name});
  if ($fname eq 'content-disposition') {
    $self->{option}->{value_case_sensible} = 0;
    $self->{option}->{value_default} = 'inline';
    $self->{option}->{value_no_regex} = $REG{NON_token};
    unless ($self->{option}->{format} =~ /^http/) {
      $self->{option}->{value_no_regex} = $REG{NON_http_token};
      $self->{option}->{use_parameter_extension} = 1;
    }
    $self->{option}->{value_type}->{'creation-date'} = ['Message::Field::Date'];
    $self->{option}->{value_type}->{'modification-date'} = ['Message::Field::Date'];
    $self->{option}->{value_type}->{'read-date'} = ['Message::Field::Date'];
  } elsif ($fname eq 'link') {
    $self->{option}->{parameter_value_unsafe_rule}->{'*value'} = 'MATCH_NONE';
    $self->{option}->{value_type}->{'*value'} = ['Message::Field::URI'];
  } else {
    $self->{option}->{parameter_value_unsafe_rule}->{'*value'}
      = 'NON_http_token_wsp';
  }
}

## Initialization for new () method.
sub _initialize_new ($;%) {
  my $self = shift;
  $self->{value} = $self->{option}->{value_default};
}

## Initialization for parse () method.
#sub _initialize_parse ($;%) {
  ## Inherited
#}

=item $vp = Message::Field::ValueParams->new ([%options])

Constructs a new object.  You might pass some options as parameters 
to the constructor.

=cut

## Inherited

=item $vp = Message::Field::ValueParams->parse ($field-body, [%options])

Constructs a new object with given field body.  You might pass 
some options as parameters to the constructor.

=cut

## Inherited

sub _save_param ($@) {
  my $self = shift;
  my @p = @_;
  $self->{value} = $self->{option}->{value_default};
  if ($p[0]->[1]->{is_parameter} == 0) {
    my $type = shift (@p)->[0];
    if ($type && $type !~ /$self->{option}->{value_no_regex}/) {
      $self->{value} = $type;
    } elsif ($type) {
      push @p, ['x-invalid-value' => {value => $type, is_parameter => 1}];
    }
  }
  #$self->{param} = \@p;
  $self->SUPER::_save_param (@p);
  $self;
}

=back

=head1 METHODS

=over 4

=item $vp->add ($name => [$value], [$name => $value,...])

Sets new parameter C<value> of $name.

  Example:
    $vp->add (title => 'foo of bar');   ## title="foo of bar"
    $vp->add (subject => 'hogehoge, foo');      ## subject*=''hogehoge%2C%20foo
    $vp->add (foo => 'bar', language => 'en')   ## foo*='en'bar

This method returns array reference of (name, {value => value, attribute...}).
C<value> is same as returned value of C<$self-E<gt>parameter>.

Available options: charset (charset name), language (language tag),
value (1/0, see example above).

=item $vp->replace ($name => [$value], [$name => $value,...])

=item $count = $vp->count

Returns the number of C<parameter>s.

=item $param-value = $vp->parameter ($name, [$new_value])

Returns given C<name>'ed C<parameter>'s C<value>.

Note that when $self->{option}->{value_type}->{$name}
is defined (and it is class name), returned value
is a reference to the object.

=item $param-name = $vp->parameter_name ($index, [$new_name])

Returns (and set) C<$index>'th C<parameter>'s name.

=item $param-value = $vp->parameter_value ($index, [$new_value])

Returns (and set) C<$index>'th C<parameter>'s value.

Note that when $self->{option}->{value_type}->{$name}
is defined (and it is class name), returned value
is a reference to the object.

=cut

## add, replace, count, parameter, parameter_name, parameter_value: Inherited.

## Hook called before returning C<value>.
## $self->_param_value ($name, $value);
## -- Inherited.

=item $field-body = $vp->stringify ()

Returns C<field-body> as a string.

=cut

sub stringify ($;%) {
  my $self = shift;
  my $param = $self->SUPER::stringify (@_);
  $self->value_as_string (@_).(defined $param? '; '.$param: '');
}
*as_string = \&stringify;

## This method is intended to be used by child classes
sub stringify_params ($;%) {
  shift->SUPER::stringify (@_);
}

=item $value = $vp->value ([$new_value])

Returns or set value.

=cut

sub value ($;$%) {
  my $self = shift;
  my $new_value = shift;
  my %option = @_;
  if (defined $new_value && $new_value !~ m#$self->{option}->{value_no_regex}#) {
    $self->{value} = $new_value;
  }
  $self->{value} = $self->_param_value ('*value' => $self->{value});
  $self->{option}->{value_case_sensible}? $self->{value}: lc $self->{value};
}

=item $value = $vp->value_as_string ([%options])

Returns value.  If necessary, quoted and encoded in
message format.  Same as C<stringify> except that
only first "value" is outputed.

=cut

sub value_as_string ($;%) {
  my $self = shift;
  my (%e) = &{$self->{option}->{hook_encode_string}} ($self, 
          $self->{value}, type => 'phrase');
  my $unsafe_rule = $self->{option}->{parameter_value_unsafe_rule}->{'*value'};
  Message::Util::quote_unsafe_string ($e{value}, unsafe => $unsafe_rule);
}


=item $option-value = $vp->option ($option-name)

Gets option value.

=item $vp->option ($option-name, $option-value, ...)

Set option value(s).  You can pass multiple option name-value pair
as parameter when setting.

=cut

## Inherited.

=item $clone = $ua->clone ()

Returns a copy of the object.

=cut

## Inherited

=head1 EXAMPLE

  use Message::Field::ValueParams;
  my $cd = new Message::Field::ValueParams (-field_name => 'Content-Disposition');
  $cd->type ('attachment');
  $cd->parameter ('filename' => 'foobar');
  $cd->parameter ('creation-date' => '')->unix_time (0);
  print $cd;    ## attachment; filename=foobar; 
                ## creation-date="Thr, 01 Jan 1970 00:00:00 +0000"

  use Message::Field::ValueParams;
  my $b = q{attachment; filename*=iso-2022-jp''%1B%24B%25U%25%21%25%24%25k%1B%28B};
  my $cd = Message::Field::ValueParams->parse ($b,
                    -field_name => 'Content-Disposition');
  my $filename = $cd->parameter ('FileName');
  if (!$filename || $filename =~ /[^A-Za-z0-9.,_~=+-]/ || -e $filename) {
    ## $filename can be unsafe, see RFC 2183.
    $filename = 'default';
  }
  open MSG, "> $filename";
    print $something;
  close MSG;

=head1 LICENSE

Copyright 2002 wakaba E<lt>w@suika.fam.cxE<gt>.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

=head1 CHANGE

See F<ChangeLog>.
$Date: 2002/04/01 05:32:15 $

=cut

1;
1	wakaba	1.1
2			=head1 NAME
3
4	wakaba	1.6	Message::Field::ValueParams --- Perl module for "word; parameter(s)" style
5			Internet message field bodies
6	wakaba	1.1
7			=cut
8
9			package Message::Field::ValueParams;
10			use strict;
11	wakaba	1.6	use vars qw(@ISA %REG $VERSION);
12			$VERSION=do{my @r=(q$Revision: 1.5 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
13			require Message::Field::Params;
14			push @ISA, qw(Message::Field::Params);
15
16			use overload '+=' => sub { $_[0]->{value} = $_[0]->{value} + $_[1]; $_[0] },
17			'-=' => sub { $_[0]->{value} = $_[0]->{value} - $_[1]; $_[0] },
18			'=' => sub { $_[0]->{value} = $_[0]->{value} $_[1]; $_[0] },
19			'=' => sub { $_[0]->{value} = $_[0]->{value} $_[1]; $_[0] },
20			'/=' => sub { $_[0]->{value} = $_[0]->{value} / $_[1]; $_[0] },
21			'%=' => sub { $_[0]->{value} = $_[0]->{value} % $_[1]; $_[0] },
22			fallback => 1;
23
24			*REG = \%Message::Field::Params::REG;
25			## Inherited: comment, quoted_string, domain_literal, angle_quoted
26			## WSP, FWS, atext, atext_dot, token, attribute_char
27			## S_encoded_word
28			## M_quoted_string
29			## param, parameter
30			## M_parameter, M_parameter_name, M_parameter_extended_value
31
32			=head1 CONSTRUCTORS
33	wakaba	1.4
34	wakaba	1.6	The following methods construct new objects:
35	wakaba	1.1
36	wakaba	1.6	=over 4
37	wakaba	1.1
38			=cut
39
40	wakaba	1.6	## Initialize of this class -- called by constructors
41			sub _init ($;%) {
42			my $self = shift;
43			my %options = @_;
44			my %DEFAULT = (
45			#delete_fws ## Inheritted
46			#encoding_after_encode ## Inherited
47			#encoding_before_decode ## Inherited
48			#format ## Inherited
49			#hook_encode_string ## Inherited
50			#hook_decode_string ## Inherited
51			#parameter_name_case_sensible ## Inherited
52			#parameter_value_max_length ## Inherited
53			#parse_all ## Inherited
54			#use_parameter_extension ## Inherited
55			-value_case_sensible => 1,
56			-value_default => '',
57			-value_no_regex => qr/(?!)/, ## default = (none)
58			-value_regex => qr/[\x00-\xFF]+/,
59			#value_type ## Inherited
60			);
61			$self->SUPER::_init (%DEFAULT, %options);
62
63			my $fname = $self->_n11n_field_name ($self->{option}->{field_name});
64			if ($fname eq 'content-disposition') {
65			$self->{option}->{value_case_sensible} = 0;
66			$self->{option}->{value_default} = 'inline';
67			$self->{option}->{value_no_regex} = $REG{NON_token};
68			unless ($self->{option}->{format} =~ /^http/) {
69			$self->{option}->{value_no_regex} = $REG{NON_http_token};
70			$self->{option}->{use_parameter_extension} = 1;
71			}
72			$self->{option}->{value_type}->{'creation-date'} = ['Message::Field::Date'];
73			$self->{option}->{value_type}->{'modification-date'} = ['Message::Field::Date'];
74			$self->{option}->{value_type}->{'read-date'} = ['Message::Field::Date'];
75			} elsif ($fname eq 'link') {
76			$self->{option}->{parameter_value_unsafe_rule}->{'*value'} = 'MATCH_NONE';
77			$self->{option}->{value_type}->{'*value'} = ['Message::Field::URI'];
78			} else {
79			$self->{option}->{parameter_value_unsafe_rule}->{'*value'}
80			= 'NON_http_token_wsp';
81			}
82			}
83	wakaba	1.1
84			## Initialization for new () method.
85			sub _initialize_new ($;%) {
86			my $self = shift;
87	wakaba	1.6	$self->{value} = $self->{option}->{value_default};
88	wakaba	1.1	}
89
90			## Initialization for parse () method.
91	wakaba	1.6	#sub _initialize_parse ($;%) {
92			## Inherited
93			#}
94
95			=item $vp = Message::Field::ValueParams->new ([%options])
96
97			Constructs a new object. You might pass some options as parameters
98			to the constructor.
99
100			=cut
101
102			## Inherited
103	wakaba	1.1
104	wakaba	1.6	=item $vp = Message::Field::ValueParams->parse ($field-body, [%options])
105	wakaba	1.1
106	wakaba	1.6	Constructs a new object with given field body. You might pass
107			some options as parameters to the constructor.
108	wakaba	1.1
109			=cut
110
111			## Inherited
112
113			sub _save_param ($@) {
114			my $self = shift;
115			my @p = @_;
116	wakaba	1.6	$self->{value} = $self->{option}->{value_default};
117	wakaba	1.1	if ($p[0]->[1]->{is_parameter} == 0) {
118			my $type = shift (@p)->[0];
119			if ($type && $type !~ /$self->{option}->{value_no_regex}/) {
120			$self->{value} = $type;
121			} elsif ($type) {
122			push @p, ['x-invalid-value' => {value => $type, is_parameter => 1}];
123			}
124			}
125	wakaba	1.5	#$self->{param} = \@p;
126			$self->SUPER::_save_param (@p);
127	wakaba	1.1	$self;
128			}
129
130	wakaba	1.6	=back
131
132			=head1 METHODS
133
134			=over 4
135
136			=item $vp->add ($name => [$value], [$name => $value,...])
137	wakaba	1.1
138			Sets new parameter C<value> of $name.
139
140			Example:
141	wakaba	1.6	$vp->add (title => 'foo of bar'); ## title="foo of bar"
142			$vp->add (subject => 'hogehoge, foo'); ## subject*=''hogehoge%2C%20foo
143			$vp->add (foo => 'bar', language => 'en') ## foo*='en'bar
144	wakaba	1.1
145			This method returns array reference of (name, {value => value, attribute...}).
146			C<value> is same as returned value of C<$self-E<gt>parameter>.
147
148			Available options: charset (charset name), language (language tag),
149			value (1/0, see example above).
150
151	wakaba	1.6	=item $vp->replace ($name => [$value], [$name => $value,...])
152	wakaba	1.1
153	wakaba	1.6	=item $count = $vp->count
154	wakaba	1.1
155	wakaba	1.6	Returns the number of C<parameter>s.
156
157			=item $param-value = $vp->parameter ($name, [$new_value])
158	wakaba	1.1
159			Returns given C<name>'ed C<parameter>'s C<value>.
160
161			Note that when $self->{option}->{value_type}->{$name}
162			is defined (and it is class name), returned value
163			is a reference to the object.
164
165	wakaba	1.6	=item $param-name = $vp->parameter_name ($index, [$new_name])
166	wakaba	1.1
167			Returns (and set) C<$index>'th C<parameter>'s name.
168
169	wakaba	1.6	=item $param-value = $vp->parameter_value ($index, [$new_value])
170	wakaba	1.1
171			Returns (and set) C<$index>'th C<parameter>'s value.
172
173			Note that when $self->{option}->{value_type}->{$name}
174			is defined (and it is class name), returned value
175			is a reference to the object.
176
177			=cut
178
179	wakaba	1.6	## add, replace, count, parameter, parameter_name, parameter_value: Inherited.
180	wakaba	1.1
181			## Hook called before returning C<value>.
182			## $self->_param_value ($name, $value);
183	wakaba	1.4	## -- Inherited.
184	wakaba	1.1
185	wakaba	1.6	=item $field-body = $vp->stringify ()
186	wakaba	1.1
187	wakaba	1.6	Returns C<field-body> as a string.
188	wakaba	1.1
189			=cut
190
191			sub stringify ($;%) {
192			my $self = shift;
193			my $param = $self->SUPER::stringify (@_);
194	wakaba	1.6	$self->value_as_string (@_).(defined $param? '; '.$param: '');
195			}
196			*as_string = \&stringify;
197
198			## This method is intended to be used by child classes
199			sub stringify_params ($;%) {
200			shift->SUPER::stringify (@_);
201	wakaba	1.1	}
202
203	wakaba	1.6	=item $value = $vp->value ([$new_value])
204	wakaba	1.1
205			Returns or set value.
206
207			=cut
208
209	wakaba	1.2	sub value ($;$%) {
210	wakaba	1.1	my $self = shift;
211			my $new_value = shift;
212	wakaba	1.2	my %option = @_;
213	wakaba	1.6	if (defined $new_value && $new_value !~ m#$self->{option}->{value_no_regex}#) {
214	wakaba	1.1	$self->{value} = $new_value;
215			}
216	wakaba	1.6	$self->{value} = $self->_param_value ('*value' => $self->{value});
217			$self->{option}->{value_case_sensible}? $self->{value}: lc $self->{value};
218	wakaba	1.2	}
219
220	wakaba	1.6	=item $value = $vp->value_as_string ([%options])
221	wakaba	1.2
222			Returns value. If necessary, quoted and encoded in
223			message format. Same as C<stringify> except that
224			only first "value" is outputed.
225
226			=cut
227
228			sub value_as_string ($;%) {
229			my $self = shift;
230			my (%e) = &{$self->{option}->{hook_encode_string}} ($self,
231			$self->{value}, type => 'phrase');
232	wakaba	1.6	my $unsafe_rule = $self->{option}->{parameter_value_unsafe_rule}->{'*value'};
233			Message::Util::quote_unsafe_string ($e{value}, unsafe => $unsafe_rule);
234	wakaba	1.1	}
235
236
237	wakaba	1.6	=item $option-value = $vp->option ($option-name)
238
239			Gets option value.
240	wakaba	1.1
241	wakaba	1.6	=item $vp->option ($option-name, $option-value, ...)
242
243			Set option value(s). You can pass multiple option name-value pair
244			as parameter when setting.
245	wakaba	1.1
246			=cut
247
248			## Inherited.
249
250	wakaba	1.6	=item $clone = $ua->clone ()
251
252			Returns a copy of the object.
253
254			=cut
255
256			## Inherited
257
258			=head1 EXAMPLE
259
260			use Message::Field::ValueParams;
261			my $cd = new Message::Field::ValueParams (-field_name => 'Content-Disposition');
262			$cd->type ('attachment');
263			$cd->parameter ('filename' => 'foobar');
264			$cd->parameter ('creation-date' => '')->unix_time (0);
265			print $cd; ## attachment; filename=foobar;
266			## creation-date="Thr, 01 Jan 1970 00:00:00 +0000"
267
268			use Message::Field::ValueParams;
269			my $b = q{attachment; filename*=iso-2022-jp''%1B%24B%25U%25%21%25%24%25k%1B%28B};
270			my $cd = Message::Field::ValueParams->parse ($b,
271			-field_name => 'Content-Disposition');
272			my $filename = $cd->parameter ('FileName');
273			if (!$filename \|\| $filename =~ /[^A-Za-z0-9.,_~=+-]/ \|\| -e $filename) {
274			## $filename can be unsafe, see RFC 2183.
275			$filename = 'default';
276			}
277			open MSG, "> $filename";
278			print $something;
279			close MSG;
280	wakaba	1.1
281			=head1 LICENSE
282
283			Copyright 2002 wakaba E<lt>w@suika.fam.cxE<gt>.
284
285			This program is free software; you can redistribute it and/or modify
286			it under the terms of the GNU General Public License as published by
287			the Free Software Foundation; either version 2 of the License, or
288			(at your option) any later version.
289
290			This program is distributed in the hope that it will be useful,
291			but WITHOUT ANY WARRANTY; without even the implied warranty of
292			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
293			GNU General Public License for more details.
294
295			You should have received a copy of the GNU General Public License
296			along with this program; see the file COPYING. If not, write to
297			the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
298			Boston, MA 02111-1307, USA.
299
300			=head1 CHANGE
301
302			See F<ChangeLog>.
303	wakaba	1.6	$Date: 2002/04/01 05:32:15 $
304	wakaba	1.1
305			=cut
306
307			1;