IkiWiki/Plugin/calendar.pm

   1 #! /usr/bin/perl
   2 # Copyright (c) 2006, 2007 Manoj Srivastava <srivasta@debian.org>
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18 require 5.002;
  19 package IkiWiki::Plugin::calendar;
  20
  21 use warnings;
  22 use strict;
  23 use IkiWiki 3.00;
  24 use Time::Local;
  25 use POSIX;
  26
  27 my $time=time;
  28 my @now=localtime($time);
  29
  30 sub import {
  31         hook(type => "getsetup", id => "calendar", call => \&getsetup);
  32         hook(type => "needsbuild", id => "calendar", call => \&needsbuild);
  33         hook(type => "preprocess", id => "calendar", call => \&preprocess);
  34 }
  35
  36 sub getsetup () {
  37         return
  38                 plugin => {
  39                         safe => 1,
  40                         rebuild => undef,
  41                 },
  42                 archivebase => {
  43                         type => "string",
  44                         example => "archives",
  45                         description => "base of the archives hierarchy",
  46                         safe => 1,
  47                         rebuild => 1,
  48                 },
  49 }
  50
  51 sub is_leap_year (@) {
  52         my %params=@_;
  53         return ($params{year} % 4 == 0 && (($params{year} % 100 != 0) || $params{year} % 400 == 0));
  54 }
  55
  56 sub month_days {
  57         my %params=@_;
  58         my $days_in_month = (31,28,31,30,31,30,31,31,30,31,30,31)[$params{month}-1];
  59         if ($params{month} == 2 && is_leap_year(%params)) {
  60                 $days_in_month++;
  61         }
  62         return $days_in_month;
  63 }
  64
  65 sub format_month (@) {
  66         my %params=@_;
  67
  68         my %linkcache;
  69         foreach my $p (pagespec_match_list($params{page},
  70                                 "creation_year($params{year}) and creation_month($params{month}) and ($params{pages})",
  71                                 # add presence dependencies to update
  72                                 # month calendar when pages are added/removed
  73                                 deptype => deptype("presence"))) {
  74                 my $mtime = $IkiWiki::pagectime{$p};
  75                 my @date  = localtime($mtime);
  76                 my $mday  = $date[3];
  77                 my $month = $date[4] + 1;
  78                 my $year  = $date[5] + 1900;
  79                 my $mtag  = sprintf("%02d", $month);
  80
  81                 # Only one posting per day is being linked to.
  82                 $linkcache{"$year/$mtag/$mday"} = $p;
  83         }
  84
  85         my $pmonth = $params{month} - 1;
  86         my $nmonth = $params{month} + 1;
  87         my $pyear  = $params{year};
  88         my $nyear  = $params{year};
  89
  90         # Adjust for January and December
  91         if ($params{month} == 1) {
  92                 $pmonth = 12;
  93                 $pyear--;
  94         }
  95         if ($params{month} == 12) {
  96                 $nmonth = 1;
  97                 $nyear++;
  98         }
  99
 100         # Add padding.
 101         $pmonth=sprintf("%02d", $pmonth);
 102         $nmonth=sprintf("%02d", $nmonth);
 103
 104         my $calendar="\n";
 105
 106         # When did this month start?
 107         my @monthstart = localtime(timelocal(0,0,0,1,$params{month}-1,$params{year}-1900));
 108
 109         my $future_dom = 0;
 110         my $today      = 0;
 111         if ($params{year} == $now[5]+1900 && $params{month} == $now[4]+1) {
 112                 $future_dom = $now[3]+1;
 113                 $today      = $now[3];
 114         }
 115
 116         # Find out month names for this, next, and previous months
 117         my $monthname=POSIX::strftime("%B", @monthstart);
 118         my $pmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
 119         my $nmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));
 120
 121         my $archivebase = 'archives';
 122         $archivebase = $config{archivebase} if defined $config{archivebase};
 123         $archivebase = $params{archivebase} if defined $params{archivebase};
 124
 125         # Calculate URL's for monthly archives.
 126         my ($url, $purl, $nurl)=("$monthname",'','');
 127         if (exists $pagesources{"$archivebase/$params{year}/$params{month}"}) {
 128                 $url = htmllink($params{page}, $params{destpage},
 129                         "$archivebase/$params{year}/".$params{month},
 130                         noimageinline => 1,
 131                         linktext => $monthname,
 132                         title => $monthname);
 133         }
 134         add_depends($params{page}, "$archivebase/$params{year}/$params{month}",
 135                 deptype("presence"));
 136         if (exists $pagesources{"$archivebase/$pyear/$pmonth"}) {
 137                 $purl = htmllink($params{page}, $params{destpage},
 138                         "$archivebase/$pyear/$pmonth",
 139                         noimageinline => 1,
 140                         linktext => "\&larr",
 141                         title => $pmonthname);
 142         }
 143         add_depends($params{page}, "$archivebase/$pyear/$pmonth",
 144                 deptype("presence"));
 145         if (exists $pagesources{"$archivebase/$nyear/$nmonth"}) {
 146                 $nurl = htmllink($params{page}, $params{destpage},
 147                         "$archivebase/$nyear/$nmonth",
 148                         noimageinline => 1,
 149                         linktext => "\&rarr",
 150                         title => $nmonthname);
 151         }
 152         add_depends($params{page}, "$archivebase/$nyear/$nmonth",
 153                 deptype("presence"));
 154
 155         # Start producing the month calendar
 156         $calendar=<<EOF;
 157 <table class="month-calendar">
 158         <caption class="month-calendar-head">
 159         $purl
 160         $url
 161         $nurl
 162         </caption>
 163         <tr>
 164 EOF
 165
 166         # Suppose we want to start the week with day $week_start_day
 167         # If $monthstart[6] == 1
 168         my $week_start_day = $params{week_start_day};
 169
 170         my $start_day = 1 + (7 - $monthstart[6] + $week_start_day) % 7;
 171         my %downame;
 172         my %dowabbr;
 173         for my $dow ($week_start_day..$week_start_day+6) {
 174                 my @day=localtime(timelocal(0,0,0,$start_day++,$params{month}-1,$params{year}-1900));
 175                 my $downame = POSIX::strftime("%A", @day);
 176                 my $dowabbr = POSIX::strftime("%a", @day);
 177                 $downame{$dow % 7}=$downame;
 178                 $dowabbr{$dow % 7}=$dowabbr;
 179                 $calendar.= qq{\t\t<th class="month-calendar-day-head $downame" title="$downame">$dowabbr</th>\n};
 180         }
 181
 182         $calendar.=<<EOF;
 183         </tr>
 184 EOF
 185
 186         my $wday;
 187         # we start with a week_start_day, and skip until we get to the first
 188         for ($wday=$week_start_day; $wday != $monthstart[6]; $wday++, $wday %= 7) {
 189                 $calendar.=qq{\t<tr>\n} if $wday == $week_start_day;
 190                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 191         }
 192
 193         # At this point, either the first is a week_start_day, in which case
 194         # nothing has been printed, or else we are in the middle of a row.
 195         for (my $day = 1; $day <= month_days(year => $params{year}, month => $params{month});
 196              $day++, $wday++, $wday %= 7) {
 197                 # At this point, on a week_start_day, we close out a row,
 198                 # and start a new one -- unless it is week_start_day on the
 199                 # first, where we do not close a row -- since none was started.
 200                 if ($wday == $week_start_day) {
 201                         $calendar.=qq{\t</tr>\n} unless $day == 1;
 202                         $calendar.=qq{\t<tr>\n};
 203                 }
 204
 205                 my $tag;
 206                 my $key="$params{year}/$params{month}/$day";
 207                 if (defined $linkcache{$key}) {
 208                         if ($day == $today) {
 209                                 $tag='month-calendar-day-this-day';
 210                         }
 211                         else {
 212                                 $tag='month-calendar-day-link';
 213                         }
 214                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">};
 215                         $calendar.=htmllink($params{page}, $params{destpage},
 216                                 $linkcache{$key},
 217                                 noimageinline => 1,
 218                                 linktext => $day,
 219                                 title => pagetitle(IkiWiki::basename($linkcache{$key})));
 220                         $calendar.=qq{</td>\n};
 221                 }
 222                 else {
 223                         if ($day == $today) {
 224                                 $tag='month-calendar-day-this-day';
 225                         }
 226                         elsif ($day == $future_dom) {
 227                                 $tag='month-calendar-day-future';
 228                         }
 229                         else {
 230                                 $tag='month-calendar-day-nolink';
 231                         }
 232                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">$day</td>\n};
 233                 }
 234         }
 235
 236         # finish off the week
 237         for (; $wday != $week_start_day; $wday++, $wday %= 7) {
 238                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 239         }
 240         $calendar.=<<EOF;
 241         </tr>
 242 </table>
 243 EOF
 244
 245         return $calendar;
 246 }
 247
 248 sub format_year (@) {
 249         my %params=@_;
 250
 251         my @post_months;
 252         foreach my $p (pagespec_match_list($params{page},
 253                                 "creation_year($params{year}) and ($params{pages})",
 254                                 # add presence dependencies to update
 255                                 # year calendar's links to months when
 256                                 # pages are added/removed
 257                                 deptype => deptype("presence"))) {
 258                 my $mtime = $IkiWiki::pagectime{$p};
 259                 my @date  = localtime($mtime);
 260                 my $month = $date[4] + 1;
 261
 262                 $post_months[$month]++;
 263         }
 264
 265         my $calendar="\n";
 266
 267         my $pyear = $params{year}  - 1;
 268         my $nyear = $params{year}  + 1;
 269
 270         my $thisyear = $now[5]+1900;
 271         my $future_month = 0;
 272         $future_month = $now[4]+1 if $params{year} == $thisyear;
 273
 274         my $archivebase = 'archives';
 275         $archivebase = $config{archivebase} if defined $config{archivebase};
 276         $archivebase = $params{archivebase} if defined $params{archivebase};
 277
 278         # calculate URL's for previous and next years
 279         my ($url, $purl, $nurl)=("$params{year}",'','');
 280         if (exists $pagesources{"$archivebase/$params{year}"}) {
 281                 $url = htmllink($params{page}, $params{destpage},
 282                         "$archivebase/$params{year}",
 283                         noimageinline => 1,
 284                         linktext => $params{year},
 285                         title => $params{year});
 286         }
 287         add_depends($params{page}, "$archivebase/$params{year}", deptype("presence"));
 288         if (exists $pagesources{"$archivebase/$pyear"}) {
 289                 $purl = htmllink($params{page}, $params{destpage},
 290                         "$archivebase/$pyear",
 291                         noimageinline => 1,
 292                         linktext => "\&larr;",
 293                         title => $pyear);
 294         }
 295         add_depends($params{page}, "$archivebase/$pyear", deptype("presence"));
 296         if (exists $pagesources{"$archivebase/$nyear"}) {
 297                 $nurl = htmllink($params{page}, $params{destpage},
 298                         "$archivebase/$nyear",
 299                         noimageinline => 1,
 300                         linktext => "\&rarr;",
 301                         title => $nyear);
 302         }
 303         add_depends($params{page}, "$archivebase/$nyear", deptype("presence"));
 304
 305         # Start producing the year calendar
 306         $calendar=<<EOF;
 307 <table class="year-calendar">
 308         <caption class="year-calendar-head">
 309         $purl
 310         $url
 311         $nurl
 312         </caption>
 313         <tr>
 314                 <th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
 315         </tr>
 316 EOF
 317
 318         for (my $month = 1; $month <= 12; $month++) {
 319                 my @day=localtime(timelocal(0,0,0,15,$month-1,$params{year}-1900));
 320                 my $murl;
 321                 my $monthname = POSIX::strftime("%B", @day);
 322                 my $monthabbr = POSIX::strftime("%b", @day);
 323                 $calendar.=qq{\t<tr>\n}  if ($month % $params{months_per_row} == 1);
 324                 my $tag;
 325                 my $mtag=sprintf("%02d", $month);
 326                 if ($month == $params{month} && $thisyear == $params{year}) {
 327                         $tag = 'year-calendar-this-month';
 328                 }
 329                 elsif ($pagesources{"$archivebase/$params{year}/$mtag"}) {
 330                         $tag = 'year-calendar-month-link';
 331                 }
 332                 elsif ($future_month && $month >= $future_month) {
 333                         $tag = 'year-calendar-month-future';
 334                 }
 335                 else {
 336                         $tag = 'year-calendar-month-nolink';
 337                 }
 338
 339                 if ($pagesources{"$archivebase/$params{year}/$mtag"} &&
 340                     $post_months[$mtag]) {
 341                         $murl = htmllink($params{page}, $params{destpage},
 342                                 "$archivebase/$params{year}/$mtag",
 343                                 noimageinline => 1,
 344                                 linktext => $monthabbr,
 345                                 title => $monthname);
 346                         $calendar.=qq{\t<td class="$tag">};
 347                         $calendar.=$murl;
 348                         $calendar.=qq{\t</td>\n};
 349                 }
 350                 else {
 351                         $calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
 352                 }
 353                 add_depends($params{page}, "$archivebase/$params{year}/$mtag",
 354                         deptype("presence"));
 355
 356                 $calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
 357         }
 358
 359         $calendar.=<<EOF;
 360 </table>
 361 EOF
 362
 363         return $calendar;
 364 }
 365
 366 sub preprocess (@) {
 367         my %params=@_;
 368
 369         my $thisyear=1900 + $now[5];
 370         my $thismonth=1 + $now[4];
 371
 372         $params{pages} = "*"            unless defined $params{pages};
 373         $params{type}  = "month"        unless defined $params{type};
 374         $params{week_start_day} = 0     unless defined $params{week_start_day};
 375         $params{months_per_row} = 3     unless defined $params{months_per_row};
 376         $params{year}  = $thisyear      unless defined $params{year};
 377         $params{month} = $thismonth     unless defined $params{month};
 378
 379         $params{month} = sprintf("%02d", $params{month});
 380
 381         if ($params{type} eq 'month' && $params{year} == $thisyear
 382             && $params{month} == $thismonth) {
 383                 # calendar for current month, updates next midnight
 384                 $pagestate{$params{destpage}}{calendar}{nextchange}=($time
 385                         + (60 - $now[0])                # seconds
 386                         + (59 - $now[1]) * 60           # minutes
 387                         + (23 - $now[2]) * 60 * 60      # hours
 388                 );
 389         }
 390         elsif ($params{type} eq 'month' &&
 391                (($params{year} == $thisyear && $params{month} > $thismonth) ||
 392                 $params{year} > $thisyear)) {
 393                 # calendar for upcoming month, updates 1st of that month
 394                 $pagestate{$params{destpage}}{calendar}{nextchange}=
 395                         timelocal(0, 0, 0, 1, $params{month}-1, $params{year});
 396         }
 397         elsif ($params{type} eq 'year' && $params{year} == $thisyear) {
 398                 # calendar for current year, updates 1st of next month
 399                 if ($thismonth < 12) {
 400                         $pagestate{$params{destpage}}{calendar}{nextchange}=
 401                                 timelocal(0, 0, 0, 1, $thismonth+1-1, $params{year});
 402                 }
 403                 else {
 404                         $pagestate{$params{destpage}}{calendar}{nextchange}=
 405                                 timelocal(0, 0, 0, 1, 1-1, $params{year}+1);
 406                 }
 407         }
 408         elsif ($params{type} eq 'year' && $params{year} > $thisyear) {
 409                 # calendar for upcoming year, updates 1st of that year
 410                 $pagestate{$params{destpage}}{calendar}{nextchange}=
 411                         timelocal(0, 0, 0, 1, 1-1, $params{year});
 412         }
 413         else {
 414                 # calendar for past month or year, does not need
 415                 # to update any more
 416                 delete $pagestate{$params{destpage}}{calendar};
 417         }
 418
 419         # Calculate month names for next month, and previous months
 420         my $calendar="";
 421         if ($params{type} eq 'month') {
 422                 $calendar=format_month(%params);
 423         }
 424         elsif ($params{type} eq 'year') {
 425                 $calendar=format_year(%params);
 426         }
 427
 428         return "\n<div><div class=\"calendar\">$calendar</div></div>\n";
 429 } #}}
 430
 431 sub needsbuild (@) {
 432         my $needsbuild=shift;
 433         foreach my $page (keys %pagestate) {
 434                 if (exists $pagestate{$page}{calendar}{nextchange}) {
 435                         if ($pagestate{$page}{calendar}{nextchange} <= $time) {
 436                                 # force a rebuild so the calendar shows
 437                                 # the current day
 438                                 push @$needsbuild, $pagesources{$page};
 439                         }
 440                         if (exists $pagesources{$page} &&
 441                             grep { $_ eq $pagesources{$page} } @$needsbuild) {
 442                                 # remove state, will be re-added if
 443                                 # the calendar is still there during the
 444                                 # rebuild
 445                                 delete $pagestate{$page}{calendar};
 446                         }
 447                 }
 448         }
 449 }
 450
 451 1