/[suikacvs]/messaging/manakai/lib/Message/Field/Date.pm
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Revision 1.15 - (hide annotations) (download)
Thu Aug 1 06:42:38 2002 UTC (22 years, 3 months ago) by wakaba
Branch: MAIN
Changes since 1.14: +5 -2 lines
2002-08-01  Wakaba <w@suika.fam.cx>

	* Unstructured.pm: Rewritten.
	* Subject.pm: Likewise.  Support Japanese government's
	spam mail prefix if Perl has defined $^V (=~ has UTF-8 support).

1 wakaba 1.1
2     =head1 NAME
3    
4 wakaba 1.9 Message::Field::Date --- Perl module for various styles of
5     date-time used in Internet messages and so on
6 wakaba 1.1
7     =cut
8    
9     package Message::Field::Date;
10     use strict;
11 wakaba 1.9 use vars qw(%DEFAULT @ISA %MONTH %REG $VERSION %ZONE);
12 wakaba 1.15 $VERSION=do{my @r=(q$Revision: 1.14 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
13 wakaba 1.9 require Message::Field::Structured;
14     push @ISA, qw(Message::Field::Structured);
15 wakaba 1.1 use Time::Local 'timegm_nocheck';
16 wakaba 1.10 use overload '0+' => sub { $_[0]->{date_time} },
17     fallback => 1;
18 wakaba 1.1
19 wakaba 1.9 %REG = %Message::Util::REG;
20 wakaba 1.14 ## RFC 822/2822 Internet Message Format
21 wakaba 1.9 $REG{M_dt_rfc822} = qr!(?:[A-Za-z]+ ## Day of week
22     [\x09\x20,]*)? ([0-9]+) ## Day
23     [\x09\x20/-]* ([A-Za-z]+) ## Month
24     [\x09\x20/-]* ([0-9]+) ## Year
25     [\x09\x20:Tt-]+ ([0-9]+) ## Hour
26     [\x09\x20:]+ ([0-9]+) ## Minute
27     [\x09\x20:]* ([0-9]+)? ## Second
28     ([\x09\x20 0-9A-Za-z+-]+)!x; ## Zone
29 wakaba 1.14 ## RFC 3339 Internet Date/Time Format (A profile of ISO 8601)
30     $REG{M_dt_rfc3339} = qr! ([0-9]{4,}) ## Year
31 wakaba 1.9 [\x09\x20.:/-]+ ([0-9]+) ## Month
32     [\x09\x20.:/-]+ ([0-9]+) ## Day
33     (?:[\x09\x20.:Tt-]+ ([0-9]+) ## Hour
34     [\x09\x20.:]+ ([0-9]+) ## Minute
35     (?:[\x09\x20.:]+ ([0-9]+) ## Second
36     (?:[\x09\x20.:]+ ([0-9]+))?)?)? ## frac.
37     ([\x09\x20 0-9A-Za-z:.+-]*) !x; ## Zone.
38 wakaba 1.14 ## RFC 733 ARPA Internet Message Format
39 wakaba 1.9 $REG{M_dt_rfc733} = qr!(?:[A-Za-z]+ ## Day of week
40     [\x09\x20,]*)? ([0-9]+) ## Day
41     [\x09\x20/-]* ([A-Za-z]+) ## Month
42     [\x09\x20/-]* ([0-9]+) ## Year
43     [\x09\x20:Tt-]+ ([0-9][0-9]) ## Hour
44     [\x09\x20:]* ([0-9][0-9]) ## Minute
45     [\x09\x20:]* ([0-9][0-9])? ## Second
46     ([\x09\x20 0-9A-Za-z+-]+)!x; ## Zone
47 wakaba 1.14 ## RFC 724 ARPA Internet Message Format (slash-date)
48 wakaba 1.9 $REG{M_dt_rfc724} = qr!(?:[A-Za-z]+ ## Day of week
49     [\x09\x20,]*)? ([0-9][0-9]?) ## Month
50     [\x09\x20/]+ ([0-9][0-9]?) ## Day
51     [\x09\x20/]+ ([0-9]{2,}) ## Year
52     [\x09\x20:Tt-]+ ([0-9][0-9]) ## Hour
53     [\x09\x20:]* ([0-9][0-9]) ## Minute
54     [\x09\x20:]* ([0-9][0-9])? ## Second
55     ([\x09\x20 0-9A-Za-z+-]+)!x; ## Zone
56 wakaba 1.1
57 wakaba 1.9 =head1 CONSTRUCTORS
58    
59     The following methods construct new objects:
60    
61     =over 4
62    
63     =cut
64    
65     ## Initialize of this class -- called by constructors
66 wakaba 1.1 %DEFAULT = (
67 wakaba 1.9 -_MEMBERS => [qw|date_time secfrac|],
68     -_METHODS => [qw|unix_time second_fraction
69     comment_add comment_count comment_item comment_delete|],
70     -date_format => 'string', ## 'unix' / 1*ALPHA
71     #field_param_name
72     #field_name
73     #format
74     #hook_encode_string
75     #hook_decode_string
76     -output_comment => 1,
77 wakaba 1.11 -fmt2str => {
78 wakaba 1.9 CC => sub { sprintf $_[2]->{_fmt}, ## Support AD only
79     (($_[1]->{$_[2]->{_prefix}.'tm'}->[5] + 1899) / 100) + 1 },
80     YYYY => sub { $_[2]->{_fmt} =~ tr/2/4/;
81     sprintf $_[2]->{_fmt},
82     $_[1]->{$_[2]->{_prefix}.'tm'}->[5] + 1900 },
83     YY => sub { sprintf $_[2]->{_fmt},
84     substr ($_[1]->{$_[2]->{_prefix}.'tm'}->[5], -2) },
85     MM => sub { sprintf $_[2]->{_fmt},
86     $_[1]->{$_[2]->{_prefix}.'tm'}->[4] + 1 },
87     Mon => sub { qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec)
88     [$_[1]->{$_[2]->{_prefix}.'tm'}->[4]] },
89     Month => sub { qw(January February March April May June
90     July August September October November December)
91     [$_[1]->{$_[2]->{_prefix}.'tm'}->[4]] },
92     DD => sub { sprintf $_[2]->{_fmt}, $_[1]->{$_[2]->{_prefix}.'tm'}->[3] },
93     Wdy => sub { qw(Sun Mon Tue Wed Thu Fri Sat)
94     [$_[1]->{$_[2]->{_prefix}.'tm'}->[6]] },
95     Weekday => sub { qw(Sunday Monday Tuesday Wednesday Thursday Friday Saturday)
96     [$_[1]->{$_[2]->{_prefix}.'tm'}->[6]] },
97     shun => sub {
98     my @alphabet = split /:/, $_[2]->{alphabet} || 'abcc';
99     my $day = $_[1]->{$_[2]->{_prefix}.'tm'}->[3];
100     $day <= 10? $alphabet[0]: ## 1 - 10 joujun
101     $day <= 20? $alphabet[1]: ## 11 - 20 chuujun
102     $alphabet[2]; ## 21 - 31 gejun
103     },
104     HH => sub { sprintf $_[2]->{_fmt}, $_[1]->{$_[2]->{_prefix}.'tm'}->[2] },
105     TT => sub { sprintf $_[2]->{_fmt}, $_[1]->{$_[2]->{_prefix}.'tm'}->[1] },
106     SS => sub { sprintf $_[2]->{_fmt}, $_[1]->{$_[2]->{_prefix}.'tm'}->[0] },
107     unix => sub { $_[1]->{$_[2]->{_prefix}.'unix'} },
108     frac => sub { $_[0]->{secfrac} },
109     zsign => sub { $_[1]->{zone}->[0] > 0 ? '+' : '-' },
110     zHH => sub { sprintf $_[2]->{_fmt}, $_[1]->{zone}->[1] },
111     zTT => sub { sprintf $_[2]->{_fmt}, $_[1]->{zone}->[2] },
112     },
113     -use_comment => 1,
114     -use_military_zone => +1, ## +1 / -1 / 0
115 wakaba 1.13 #zone => [+1, 0, 0],
116 wakaba 1.9 -zone_default_string => '-0000',
117 wakaba 1.1 );
118    
119     %MONTH = (
120     JAN => 1, JANUARY => 1,
121     FEB => 2, FEBRUARY => 2,
122     MAR => 3, MARCH => 3,
123     APR => 4, APRIL => 4,
124     MAY => 5,
125     JUN => 6, JUNE => 6,
126     JUL => 7, JULY => 7,
127     AUG => 8, AUGUST => 8,
128 wakaba 1.8 SEP => 9, SEPTEMBER => 9, SEPT => 9,
129 wakaba 1.1 OCT => 10, OCTOBER => 10,
130     NOV => 11, NOVEMBER => 11,
131     DEC => 12, DECEMBER => 12,
132     );
133    
134 wakaba 1.9 %ZONE = ( ## NA = Northern America
135     ADT => [-1, 3, 0], ## (NA)Atlantic Daylight 733
136     CHST => [-1, 10, 0], ## Alaska-Hawaii Standard
137     AST => [-1, 4, 0], ## (NA)Atlantic Standard 733
138     AT => [-1, 2, 0], ## Azores
139     BDT => [-1, 10, 0], ## 733
140     BST => [-1, 11, 0], ## 733
141     #BST => [+1, 1, 0], ## British Summer
142     #BST => [-1, 3, 0], ## Brazil Standard
143     BT => [+1, 3, 0], ## Baghdad
144     CADT => [+1, 10, 30], ## Central Australian Daylight
145     CAST => [+1, 9, 30], ## Central Australian Standard
146     CAT => [-1, 10, 0], ## Central Alaska
147     CCT => [+1, 8, 0], ## China Coast
148     CDT => [-1, 5, 0], ## (NA)Central Daylight 733, 822
149     CET => [+1, 1, 0], ## Central European
150     CEST => [+1, 2, 0], ## Central European Daylight
151     CST => [-1, 6, 0], ## (NA)Central Standard 733, 822
152     EADT => [+1, 11, 0], ## Eastern Australian Daylight
153     EADT => [+1, 10, 0], ## Eastern Australian Standard
154     ECT => [+1, 1, 0], ## Central European (French)
155     EDT => [-1, 4, 0], ## (NA)Eastern Daylight 733, 822
156     EEST => [+1, 3, 0], ## Eastern European Summer
157     EET => [+1, 2, 0], ## Eastern Europe 1947
158     EST => [-1, 5, 0], ## (NA)Eastern Standard 733, 822
159     EWT => [-1, 4, 0], ## U.S. Eastern War Time
160     FST => [+1, 2, 0], ## French Summer
161     FWT => [+1, 1, 0], ## French Winter
162     GDT => [+1, 1, 0], ## 724
163     GMT => [+1, 0, 0], ## Greenwich Mean 733, 822
164     #GST => [-1, 3, 0], ## Greenland Standard
165     GST => [+1, 10, 0], ## Guam Standard
166     HDT => [-1, 9, 0], ## Hawaii Daylight 733
167     HKT => [+1, 8, 0], ## Hong Kong
168     HST => [-1, 10, 0], ## Hawaii Standard 733
169     IDLE => [+1, 12, 0], ## International Date Line East
170     IDLW => [-1, 12, 0], ## International Date Line West
171 wakaba 1.2 IDT => [+1, 3, 0],
172 wakaba 1.9 IST => [+1, 2, 0], ## Israel standard
173     #IST => [+1, 5, 30], ## Indian standard
174     IT => [+1, 3, 30], ## Iran
175     JST => [+1, 9, 0], ## Japan Central Standard
176     JT => [+1, 7, 30], ## Java
177     KDT => [+1, 10, 0], ## Korean Daylight
178     KST => [+1, 9, 0], ## Korean Standard
179 wakaba 1.14 LCL => [-1, 0, 0], ## (unknown zone used by LSMTP)
180     LOCAL => [-1, 0, 0], ## local time zone
181     LT => [-1, 0, 0], ## Luna Time [RFC 1607]
182 wakaba 1.9 MDT => [-1, 6, 0], ## (NA)Mountain Daylight 733, 822
183     MET => [+1, 0, 0], ## Middle European
184     METDST => [+1, 2, 0],
185     MEST => [+1, 2, 0], ## Middle European Summer
186     MEWT => [+1, 0, 0], ## Middle European Winter
187     MEZ => [+1, 0, 0], ## Central European (German)
188     MST => [-1, 7, 0], ## (NA)Mountain Standard 733, 822
189 wakaba 1.14 MT => [-1, 0, 0], ## Mars Time [RFC 1607]
190 wakaba 1.9 NDT => [-1, 2, 30], ## Newfoundland Daylight
191     NFT => [-1, 3, 30], ## Newfoundland Standard
192     NST => [-1, 3, 30], ## Newfoundland Standard 733
193     #NST => [-1, 6, 30], ## North Sumatra
194     NT => [-1, 11, 0], ## Nome
195     NZD => [+1, 13, 0], ## New Zealand Daylight
196     NZT => [+1, 12, 0], ## New Zealand
197     NZDT => [+1, 13, 0], ## New Zealand Daylight
198     NZST => [+1, 12, 0], ## New Zealand Standard
199     PDT => [-1, 7, 0], ## (NA)Pacific Daylight 733, 822
200     PST => [-1, 8, 0], ## (NA)Pacific Standard 733, 822
201     SET => [+1, 1, 0], ## Seychelles
202     SST => [+1, 2, 0], ## Swedish Summer
203     #SST => [+1, 7, 0], ## South Sumatra
204     SWT => [+1, 1, 0], ## Swedish Winter
205     UKR => [+1, 2, 0], ## Ukraine
206 wakaba 1.14 UT => [+1, 0, 0], ## Universal Time 822
207     UTC => [+1, 0, 0], ## Coordinated Universal Time
208 wakaba 1.9 WADT => [+1, 8, 0], ## West Australian Daylight
209     WAT => [-1, 0, 0], ## West Africa
210     WET => [+1, 0, 0], ## Western European
211     WST => [+1, 8, 0], ## West Australian Standard
212     YDT => [-1, 8, 0], ## Yukon Daylight 733
213     YST => [-1, 9, 0], ## Yukon Standard 733
214     Z => [+1, 0, 0], ## 822, ISO 8601
215     ZP4 => [+1, 4, 0], ## Z+4
216     ZP5 => [+1, 5, 0], ## Z+5
217     ZP6 => [+1, 6, 0], ## Z+6
218 wakaba 1.1 );
219    
220 wakaba 1.9 ## -use_military_zone => +1 / -1 / 0
221     ## Whether military zone names are understood or not.
222     ## +1 Admits them and treats as standard value. (eg. "A" = +0100)
223     ## -1 Admits them but treats as negative value. (eg. "A" = -0100)
224     ## 0 They are ignored and zone is set as -0000. (eg. "A" = -0000)
225     ## Because of typo in BNF comment of RFCs 733 and 822,
226     ## quite a few implemention use these values incorrectly.
227     ## As a result, these zone names carry no worthful information.
228     ## RFC 2822 recommends these names be taken as '-0000' (i.e.
229     ## unknown zone).
230 wakaba 1.1
231 wakaba 1.9 sub _set_military_zone_name ($) {
232 wakaba 1.1 my $self = shift;
233 wakaba 1.9 my $mode = $self->{option}->{use_military_zone};
234 wakaba 1.1 my $i = 0;
235 wakaba 1.9 if ($mode == 0) {
236     for my $letter ('A'..'Y') {$ZONE{$letter} = [-1, 0, 0]} return;
237 wakaba 1.1 }
238     for my $letter ('Z', 'A'..'I', 'K'..'M') {
239     $ZONE{$letter} = [+1*$mode, $i++, 0];
240     } $i = 1;
241     for my $letter ('N'..'Y') {
242     $ZONE{$letter} = [-1*$mode, $i++, 0];
243     }
244     }
245    
246 wakaba 1.9 sub _init ($;%) {
247     my $self = shift;
248     my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
249     my %option = @_;
250     $self->SUPER::_init (%$DEFAULT, %option);
251     $self->{date_time} = $option{unix} if defined $option{unix};
252     $self->{secfrac} = $option{frac} if defined $option{frac};
253 wakaba 1.13 unless (ref $self->{option}->{zone}) {
254     my $zone = $self->{option}->{zone} || ''; #$main::ENV{TZ} || '';
255     ## Since _zone_string_to_array does not provide full support
256     ## of parsing TZ format (eg. daytime), not seeing it might be
257     ## better way.
258     if (length $zone) {
259     $self->{option}->{zone} = [ $self->_zone_string_to_array ($zone) ];
260     } else {
261     my $time = time;
262     my $ltime = timegm_nocheck (localtime ($time));
263     my $o = int ( ($ltime - $time) / 60);
264     my @zone;
265     $zone[2] = $o % 60; $o = int ( $o / 60 );
266     $zone[1] = $o % 24;
267     $zone[0] = $o >= 0 ? +1 : -1;
268     $self->{option}->{zone} = \@zone;
269     }
270     }
271 wakaba 1.9
272     my $format = $self->{option}->{format};
273 wakaba 1.14 if ($format =~ /mail-rfc2822/) {
274 wakaba 1.9 $self->{option}->{use_military_zone} = 0;
275     }
276    
277     $self->_set_military_zone_name;
278     }
279    
280     =item $date = Message::Field::Date->new ([%options])
281 wakaba 1.1
282 wakaba 1.9 Constructs a new object. You might pass some options as parameters
283     to the constructor.
284 wakaba 1.1
285     =cut
286    
287 wakaba 1.9 ## Inherited
288 wakaba 1.1
289 wakaba 1.9 =item $date = Message::Field::Date->parse ($field-body, [%options])
290 wakaba 1.1
291 wakaba 1.9 Constructs a new object with given field body. You might pass
292     some options as parameters to the constructor.
293 wakaba 1.1
294     =cut
295    
296     sub parse ($$;%) {
297 wakaba 1.9 my $class = shift;
298     my $self = bless {}, $class;
299     my $body = shift;
300     $self->_init (@_);
301     ($body, @{$self->{comment}})
302     = $self->Message::Util::delete_comment_to_array ($body)
303     if $self->{option}->{use_comment};
304     $body =~ s/^$REG{WSP}+//; $body =~ s/$REG{WSP}+$//;
305     if ($self->{option}->{date_format} eq 'unix') {
306     $self->{date_time} = int ($body);
307 wakaba 1.13 } elsif (!$body) {
308     return $self;
309 wakaba 1.9 } elsif ($body =~ /^$REG{M_dt_rfc822}$/x) {
310 wakaba 1.1 my ($day, $month, $year, $hour, $minute, $second, $zone)
311     = ($1, uc $2, $3, $4, $5, $6, uc $7);
312     $month = $MONTH{$month} || 1;
313 wakaba 1.9 $year = $self->_obvious_year ($year) if length($year)<4;
314 wakaba 1.1 my ($zone_sign, $zone_hour, $zone_minute) = $self->_zone_string_to_array ($zone);
315     eval '$self->{date_time} = timegm_nocheck
316     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
317     $day, $month-1, $year);';
318 wakaba 1.2 $self->{secfrac} = '';
319     $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
320 wakaba 1.14 } elsif ($body =~ /^$REG{M_dt_rfc3339}$/x) {
321 wakaba 1.9 my ($year,$month,$day,$hour,$minute,$second,$secfrac,$zone)
322     = ($1, $2, $3, $4, $5, $6, $7, $8);
323     my ($zone_sign, $zone_hour, $zone_minute) = $self->_zone_string_to_array ($zone);
324 wakaba 1.2 eval '$self->{date_time} = timegm_nocheck
325     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
326     $day, $month-1, $year);';
327     $self->{secfrac} = $secfrac;
328 wakaba 1.1 $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
329 wakaba 1.9 } elsif ($body =~ /^$REG{M_dt_rfc733}$/x) {
330 wakaba 1.1 my ($day, $month, $year, $hour, $minute, $second, $zone)
331     = ($1, uc $2, $3, $4, $5, $6, uc $7);
332     $month = $MONTH{$month} || 1;
333 wakaba 1.9 $year = $self->_obvious_year ($year) if length($year)<4;
334 wakaba 1.1 my ($zone_sign, $zone_hour, $zone_minute) = $self->_zone_string_to_array ($zone);
335     eval '$self->{date_time} = timegm_nocheck
336     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
337     $day, $month-1, $year);';
338 wakaba 1.2 $self->{secfrac} = '';
339     $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
340 wakaba 1.9 } elsif ($body =~ /^$REG{M_dt_rfc724}$/x) {
341 wakaba 1.2 my ($month, $day, $year, $hour, $minute, $second, $zone)
342     = ($1, $2, $3, $4, $5, $6, uc $7);
343 wakaba 1.9 $year = $self->_obvious_year ($year) if length($year)<4;
344 wakaba 1.2 my ($zone_sign, $zone_hour, $zone_minute) = $self->_zone_string_to_array ($zone);
345     eval '$self->{date_time} = timegm_nocheck
346     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
347     $day, $month-1, $year);';
348     $self->{secfrac} = '';
349 wakaba 1.1 $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
350 wakaba 1.9 #} elsif ($body =~ /^[0-9]+$/) {
351     # $self->{date_time} = $&;
352 wakaba 1.1 } else {
353 wakaba 1.9 ## From HTTP::Date (revision 1.40) by Gisle Aas
354     #$body =~ s/^\s+//; # kill leading space
355     $body =~ s/^(?:Sun|Mon|Tue|Wed|Thu|Fri|Sat)[a-z]*,?\s*//i; # Useless weekday
356     my ($day, $month, $year, $hour, $minute, $second);
357     my ($secfrac, $zone, $ampm) = ('', $self->{option}->{zone_default_string});
358    
359     # Then we are able to check for most of the formats with this regexp
360     (($day,$month,$year,$hour,$minute,$second,$zone) =
361     $body =~ m"^
362     (\d\d?) # day
363     (?:\s+|[-\/])
364     (\w+) # month
365     (?:\s+|[-\/])
366     (\d+) # year
367     (?:
368     (?:\s+|:) # separator before clock
369     (\d\d?):(\d\d) # hour:min
370     (?::(\d\d))? # optional seconds
371     )? # optional clock
372     \s*
373     ([-+]?\d{2,4}|(?![APap][Mm]\b)[A-Za-z]+)? # timezone
374     $"x)
375    
376     ||
377    
378     # Try the ctime and asctime format
379     (($month, $day, $hour, $minute, $second, $zone, $year) =
380     $body =~ m"^
381     (\w{1,3}) # month
382     \s+
383     (\d\d?) # day
384     \s+
385     (\d\d?):(\d\d) # hour:min
386     (?::(\d\d))? # optional seconds
387     \s+
388     (?:([A-Za-z]+)\s+)? # optional timezone
389     (\d+) # year
390     $"x)
391    
392     ||
393    
394     # Then the Unix 'ls -l' date format
395     (($month, $day, $year, $hour, $minute, $second) =
396     $body =~ m"^
397     (\w{3}) # month
398     \s+
399     (\d\d?) # day
400     \s+
401     (?:
402     (\d\d\d\d) | # year
403     (\d{1,2}):(\d{2}) # hour:min
404     (?::(\d\d))? # optional seconds
405     )
406     $"x)
407    
408     ||
409    
410     # ISO 8601 format '1996-02-29 12:00:00 -0100' and variants
411     (($year, $month, $day, $hour, $minute, $second, $secfrac, $zone) =
412     $body =~ m"^
413     (\d{4}) # year
414     [-\/]?
415     (\d\d?) # numerical month
416     [-\/]?
417     (\d\d?) # day
418     (?:
419     (?:\s+|[-:Tt]) # separator before clock
420     (\d\d?):?(\d\d) # hour:min
421     (?:
422     :?
423     (\d\d)
424     (?:\.?(\d+))? ## optional second frac.
425     )? # optional seconds
426     )? # optional clock
427     \s*
428     ([-+]?\d\d?:?(:?\d\d)?
429     |Z|z)? # timezone (Z is 'zero meridian', i.e. GMT)
430    
431     $"x)
432    
433     ||
434    
435     # ISO 8601 like format '96-02-29 2:0:0 -0100' and variants
436     (($year, $month, $day, $hour, $minute, $second, $secfrac, $zone) =
437     $body =~ m"^
438     (\d+) # year
439     [-/]
440     (\d\d?) # numerical month
441     [-/]
442     (\d\d?) # day
443     (?:
444     (?:\s+|[-:Tt]) # separator before clock
445     (\d\d?):(\d+) # hour:min
446     (?:
447     :
448     (\d+)
449     (?:\.(\d+)) ## optional second frac.
450     )? # optional seconds
451     )? # optional clock
452     \s*
453     ([-+]?\d+(:\d+)?
454     |Z|z)? # timezone (Z is 'zero meridian', i.e. GMT)
455    
456     $"x)
457    
458     ||
459    
460     # Windows 'dir' 11-12-96 03:52PM
461     (($month, $day, $year, $hour, $minute, $ampm) =
462     $body =~ m"^
463     (\d{2}) # numerical month
464     -
465     (\d{2}) # day
466     -
467     (\d{2}) # year
468     \s+
469     (\d\d?):(\d\d)([APap][Mm]) # hour:min AM or PM
470     $"x)
471    
472     #||
473     #return; # unrecognized format
474     ;
475    
476     $day ||= 1;
477     # Translate month name to number
478 wakaba 1.12 $month ||= 1;
479 wakaba 1.9 $month = $MONTH{uc $month}
480 wakaba 1.12 || int ($month);
481 wakaba 1.9
482     # If the year is missing, we assume first date before the current,
483     # because of the formats we support such dates are mostly present
484     # on "ls -l" listings.
485     unless (defined $year) {
486     my $cur_mon;
487     ($cur_mon, $year) = (localtime)[4, 5];
488     $year += 1900; $cur_mon++;
489     $year-- if $month > $cur_mon;
490     } elsif (length($year) < 3) {
491     $year = $self->_obvious_year ($year);
492     }
493    
494     # Make sure clock elements are defined
495     $hour = 0 unless defined($hour);
496     $minute = 0 unless defined($minute);
497     $second = 0 unless defined($second);
498    
499     # Compensate for AM/PM
500     if ($ampm) {
501     $ampm = uc $ampm;
502     $hour = 0 if $hour == 12 && $ampm eq 'AM';
503     $hour += 12 if $ampm eq 'PM' && $hour != 12;
504     }
505    
506     my ($zone_sign, $zone_hour, $zone_minute) = $self->_zone_string_to_array ($zone);
507     eval '$self->{date_time} = timegm_nocheck
508     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
509     $day, $month-1, $year);';
510     $self->{secfrac} = $secfrac;
511     $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
512 wakaba 1.1 }
513     $self;
514     }
515    
516 wakaba 1.10 sub zone ($;$) {
517     my $self = shift;
518     my $newzone = shift;
519 wakaba 1.12 if (ref $newzone) {
520     $self->{option}->{zone} = $newzone;
521     } elsif (length $newzone) {
522 wakaba 1.10 $self->{option}->{zone} = [$self->_zone_string_to_array ($newzone)];
523     }
524     $self->{option}->{zone};
525     }
526    
527 wakaba 1.9 ## Find "obvious" year
528     sub _obvious_year ($$) {
529     my $self = shift;
530     my $year = shift;
531     if ($self->{option}->{format} =~ /mail|news/) {
532     ## RFC 2822
533     if ( 0 <=$year && $year < 50) {$year += 2000}
534     elsif (50 < $year && $year < 1000) {$year += 1900}
535     } else {
536     ## RFC 2616
537     my $cur_yr = (localtime)[5] + 1900;
538     my $m = $cur_yr % 100;
539     my $tmp = $year;
540     $year += $cur_yr - $m;
541     $m -= $tmp;
542     $year += ($m > 0) ? 100 : -100 if abs($m) > 50;
543     }
544     $year;
545     }
546    
547     =back
548    
549     =head1 METHODS
550    
551     =over 4
552    
553    
554 wakaba 1.4 =head2 $self->unix_time ([$new_time])
555    
556     Returns or set the unix-time (seconds from the Epoch).
557    
558     =cut
559    
560     sub unix_time ($;$) {
561     my $self = shift;
562     my $new_time = shift;
563     if (defined $new_time) {
564 wakaba 1.6 $self->{date_time} = $new_time + 0;
565 wakaba 1.4 }
566     $self->{date_time};
567     }
568    
569 wakaba 1.10 sub set_datetime ($@) {
570     my $self = shift;
571     my ($year,$month,$day,$hour,$minute,$second,%misc) = @_;
572     my ($zone_sign, $zone_hour, $zone_minute)
573     = $self->_zone_string_to_array ($misc{zone});
574     eval '$self->{date_time} = timegm_nocheck
575     ($second, $minute-($zone_sign*$zone_minute), $hour-($zone_sign*$zone_hour),
576     $day, $month-1, $year);';
577     $self->{secfrac} = $misc{secfrac};
578     $self->{option}->{zone} = [$zone_sign, $zone_hour, $zone_minute];
579     }
580    
581 wakaba 1.2 =head2 $self->second_fraction ([$new_fraction])
582    
583     Returns or set the decimal fraction of a second.
584     Value is a string containing of only [0-9]
585     or empty string.
586    
587 wakaba 1.15 Note that this implemention is temporary and in the near future
588     it can be changed.
589    
590 wakaba 1.2 =cut
591    
592     sub second_fraction ($;$) {
593     my $self = shift;
594     my $new_fraction = shift;
595     if (defined $new_fraction) {
596     $self->{secfrac} = $new_fraction unless $new_fraction =~ /[^0-9]/;
597     }
598     $self->{secfrac};
599     }
600    
601 wakaba 1.9 =item $field-body = $date->stringify ()
602 wakaba 1.1
603     Returns C<field-body> as a string.
604    
605     =cut
606    
607 wakaba 1.2 sub stringify ($;%) {
608 wakaba 1.1 my $self = shift;
609 wakaba 1.9 my %o = @_;
610     my %option = %{$self->{option}};
611     for (grep {/^-/} keys %o) {$option{substr ($_, 1)} = $o{$_}}
612     unless ($option{format_template}) {
613 wakaba 1.14 if ($option{format} =~ /mail-rfc2822|news-usefor|mail-rfc822\+rfc1123|news-son-of-rfc1036|mime/) {
614 wakaba 1.9 $option{format_template} = '%Wdy(local);, %DD(local); %Mon(local); %YYYY(local); %HH(local);:%TT(local);:%SS(local); %zsign;%zHH;%zTT;';
615     } elsif ($option{format} =~ /http/) {
616     $option{format_template} = '%Wdy;, %DD; %Mon; %YYYY; %HH;:%TT;:%SS; GMT';
617 wakaba 1.14 } elsif ($option{format} =~ /mail-rfc822|news-rfc1036/) {
618 wakaba 1.9 $option{format_template} = '%Wdy(local);, %DD(local); %Mon(local); %YY(local); (%YYYY(local);) %HH(local);:%TT(local);:%SS(local); %zsign;%zHH;%zTT;';
619 wakaba 1.14 } elsif ($option{format} =~ /news-rfc850/) {
620 wakaba 1.9 $option{format_template} = '%Weekday;, %DD;-%Mon;-%YY; %HH;:%TT;:%SS; GMT';
621     } elsif ($option{format} =~ /asctime/) {
622     $option{format_template} = '%Wdy; %Mon; %DD(pad=>SP); %HH;:%MM;:%SS; %YYYY;';
623     #} elsif ($option{format} =~ /date\(1\)/) {
624     # $option{format_template} = '%Wdy; %Mon; %DD(pad=>SP); %HH;:%MM;:%SS; GMT %YYYY;';
625 wakaba 1.14 } elsif ($option{format} =~ /un[i*]x/) { ## ;-)
626 wakaba 1.9 $option{format_template} = '%unix;';
627 wakaba 1.14 } else { ## RFC 3339 (IETF's ISO 8601)
628 wakaba 1.9 $option{format_template} = '%YYYY(local);-%MM(local);-%DD(local);T%HH(local);:%TT(local);:%SS(local);%frac(prefix=>.);%zsign;%zHH;:%zTT;';
629     }
630 wakaba 1.2 }
631 wakaba 1.9 $self->_date2str (\%option)
632     . (($option{output_comment} && @{$self->{comment}} > 0)?
633     ' ' . $self->_comment_stringify: '');
634     }
635     *as_string = \&stringify;
636     *as_plain_string = \&stringify;
637 wakaba 1.10 ## You should use stringify instead of as_rfc2822_time
638     sub as_rfc2822_time ($@) {
639     shift->stringify (-format => 'mail-rfc2822', @_);
640     }
641 wakaba 1.9
642 wakaba 1.12 sub _date2str ($\%\%) {
643 wakaba 1.9 my $self = shift;
644     my $option = shift;
645 wakaba 1.12 my $gparam = shift;
646 wakaba 1.11 my $template = $option->{format_template};
647     my $time = $self->{date_time};
648     $time = $option->{date_time} if defined $option->{date_time};
649     my $zone = $option->{zone};
650 wakaba 1.12 if (ref $zone) { }
651 wakaba 1.9 elsif (length $zone) {$zone = [$self->_zone_string_to_array ($zone)]}
652     my $l_time = $time + $zone->[0] * ($zone->[1] * 60 + $zone->[2]) * 60;
653     my %time = (unix => $time,
654     tm => [gmtime ($time)],
655     l_unix => $l_time,
656     l_tm => [gmtime ($l_time)],
657     zone => $zone);
658     $template =~ s{%([A-Za-z0-9_]+)(?:\(([A-Za-z0-9,.:\x09\x20=>_-]*)\))?;}{
659     my ($f, $a) = ($1, $2);
660 wakaba 1.11 my $function = $option->{fmt2str}->{$f};
661 wakaba 1.9 if (ref $function) {
662     my %a;
663     for (split /[\x09\x20]*,[\x09\x20]*/, $a) {
664     if (/^([^=]+)=>(.+)$/) {$a{$1} = $2}
665     else {$a{$_} = 1}
666     }
667     $a{_prefix} = $a{local}? 'l_': '';
668     $a{_fmt} = $a{pad} eq 'SP'? '%2d':
669     $a{pad} eq 'none'? '%d':
670     '%02d';
671 wakaba 1.12 my $r = &$function ($self, \%time, \%a, $gparam);
672 wakaba 1.9 length $r? $a{prefix}.$r.$a{suffix}: '';
673     } elsif (length $function) {
674     $function;
675     } else {
676     "[$f: undef]";
677     }
678     }gex;
679     $template;
680 wakaba 1.1 }
681    
682 wakaba 1.2
683 wakaba 1.1
684     sub _zone_string_to_array ($$;$) {
685     my $self = shift;
686     my $zone = shift;
687 wakaba 1.12 return (+1, 0, 0) unless defined $zone;
688 wakaba 1.1 my $format = shift;
689     my @azone = [+1, 0, 0];
690 wakaba 1.9 $zone =~ tr/\x09\x20//d;
691 wakaba 1.13 if ($zone =~ /^[^0-9+-]+(?:([+-]?)([0-9]{1,2}))(?::([0-9]{1,2}))?/) {
692     ## $ENV{TZ} format, but is not fully supported
693     my ($s, $h, $m) = ($1, $2, $3);
694     $s ||= '+'; $s =~ tr/+-/-+/;
695     @azone = ("${s}1", 0+$h, 0+$m);
696     } elsif ($zone =~ /([+-])([0-9][0-9])([0-9][0-9])/) {
697 wakaba 1.9 @azone = ("${1}1", $2, $3);
698     } elsif ($zone =~ /([+-]?)([0-9]+)(?:[:.-]([0-9]+))?/) {
699 wakaba 1.13 @azone = ("${1}1", $2, 0+$3);
700 wakaba 1.1 } else { $zone =~ tr/-//d;
701     if (ref $ZONE{$zone}) {@azone = @{$ZONE{$zone}}}
702     elsif ($zone) {@azone = (-1, 0, 0)}
703     }
704     # }
705     @azone;
706     }
707    
708 wakaba 1.9 =item $option-value = $date->option ($option-name)
709    
710     Gets option value.
711    
712     =item $date->option ($option-name, $option-value, ...)
713    
714     Set option value(s). You can pass multiple option name-value pair
715     as parameter when setting.
716    
717     =item $clone = $date->clone ()
718    
719     Returns a copy of the object.
720    
721     =cut
722    
723     ## option, clone, method_available: Inherited
724    
725 wakaba 1.1 =head1 EXAMPLE
726    
727 wakaba 1.2 use Message::Field::Date;
728 wakaba 1.1
729 wakaba 1.9 print Message::Field::Date->new (unix => time,
730     -zone => '+0900'),"\n"; ## Thu, 16 May 2002 17:53:44 +0900
731     print Message::Field::Date->new (unix => time,
732     -format_template => ## Century: 21, Year: 02, Month: 05
733     'Century: %CC;, Year: %YY;, Month: %MM;'),"\n";
734    
735 wakaba 1.2 my $field_body = '04 Feb 2002 00:12:33 CST';
736     my $field = Message::Field::Date->parse ($field_body);
737 wakaba 1.1
738 wakaba 1.9 print "RFC 2822:\t", $field->stringify (-format => 'mail-rfc2822'), "\n";
739     print "HTTP preferred:\t", $field->stringify (-format => 'http-1.1'), "\n";
740     print "ISO 8601:\t", $field->stringify (-format => 'mail-cpim'), "\n";
741     ## RFC 2822: Mon, 04 Feb 2002 00:12:33 -0600
742     ## HTTP preferred: Mon, 04 Feb 2002 06:12:33 GMT
743     ## ISO 8601: 2002-02-04T00:12:33-06:00
744 wakaba 1.1
745     =head1 LICENSE
746    
747     Copyright 2002 wakaba E<lt>w@suika.fam.cxE<gt>.
748    
749     This program is free software; you can redistribute it and/or modify
750     it under the terms of the GNU General Public License as published by
751     the Free Software Foundation; either version 2 of the License, or
752     (at your option) any later version.
753    
754     This program is distributed in the hope that it will be useful,
755     but WITHOUT ANY WARRANTY; without even the implied warranty of
756     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
757     GNU General Public License for more details.
758    
759     You should have received a copy of the GNU General Public License
760     along with this program; see the file COPYING. If not, write to
761     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
762     Boston, MA 02111-1307, USA.
763    
764     =head1 CHANGE
765    
766     See F<ChangeLog>.
767 wakaba 1.15 $Date: 2002/07/30 08:50:36 $
768 wakaba 1.1
769     =cut
770    
771     1;

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