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}, $params{pages},
  70                                 # add presence dependencies to update
  71                                 # month calendar when pages are added/removed
  72                                 deptype => deptype("presence"))) {
  73                 my $mtime = $IkiWiki::pagectime{$p};
  74                 my @date  = localtime($mtime);
  75                 my $mday  = $date[3];
  76                 my $month = $date[4] + 1;
  77                 my $year  = $date[5] + 1900;
  78                 my $mtag  = sprintf("%02d", $month);
  79
  80                 # Only one posting per day is being linked to.
  81                 $linkcache{"$year/$mtag/$mday"} = $p;
  82         }
  83
  84         my $pmonth = $params{month} - 1;
  85         my $nmonth = $params{month} + 1;
  86         my $pyear  = $params{year};
  87         my $nyear  = $params{year};
  88
  89         # Adjust for January and December
  90         if ($params{month} == 1) {
  91                 $pmonth = 12;
  92                 $pyear--;
  93         }
  94         if ($params{month} == 12) {
  95                 $nmonth = 1;
  96                 $nyear++;
  97         }
  98
  99         # Add padding.
 100         $pmonth=sprintf("%02d", $pmonth);
 101         $nmonth=sprintf("%02d", $nmonth);
 102
 103         my $calendar="\n";
 104
 105         # When did this month start?
 106         my @monthstart = localtime(timelocal(0,0,0,1,$params{month}-1,$params{year}-1900));
 107
 108         my $future_dom = 0;
 109         my $today      = 0;
 110         if ($params{year} == $now[5]+1900 && $params{month} == $now[4]+1) {
 111                 $future_dom = $now[3]+1;
 112                 $today      = $now[3];
 113         }
 114
 115         # Find out month names for this, next, and previous months
 116         my $monthname=POSIX::strftime("%B", @monthstart);
 117         my $pmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
 118         my $nmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));
 119
 120         my $archivebase = 'archives';
 121         $archivebase = $config{archivebase} if defined $config{archivebase};
 122         $archivebase = $params{archivebase} if defined $params{archivebase};
 123
 124         # Calculate URL's for monthly archives.
 125         my ($url, $purl, $nurl)=("$monthname",'','');
 126         if (exists $pagesources{"$archivebase/$params{year}/$params{month}"}) {
 127                 $url = htmllink($params{page}, $params{destpage},
 128                         "$archivebase/$params{year}/".$params{month},
 129                         linktext => " $monthname ");
 130         }
 131         add_depends($params{page}, "$archivebase/$params{year}/$params{month}",
 132                 deptype("presence"));
 133         if (exists $pagesources{"$archivebase/$pyear/$pmonth"}) {
 134                 $purl = htmllink($params{page}, $params{destpage},
 135                         "$archivebase/$pyear/$pmonth",
 136                         linktext => " $pmonthname ");
 137         }
 138         add_depends($params{page}, "$archivebase/$pyear/$pmonth",
 139                 deptype("presence"));
 140         if (exists $pagesources{"$archivebase/$nyear/$nmonth"}) {
 141                 $nurl = htmllink($params{page}, $params{destpage},
 142                         "$archivebase/$nyear/$nmonth",
 143                         linktext => " $nmonthname ");
 144         }
 145         add_depends($params{page}, "$archivebase/$nyear/$nmonth",
 146                 deptype("presence"));
 147
 148         # Start producing the month calendar
 149         $calendar=<<EOF;
 150 <table class="month-calendar">
 151         <caption class="month-calendar-head">
 152         $purl
 153         $url
 154         $nurl
 155         </caption>
 156         <tr>
 157 EOF
 158
 159         # Suppose we want to start the week with day $week_start_day
 160         # If $monthstart[6] == 1
 161         my $week_start_day = $params{week_start_day};
 162
 163         my $start_day = 1 + (7 - $monthstart[6] + $week_start_day) % 7;
 164         my %downame;
 165         my %dowabbr;
 166         for my $dow ($week_start_day..$week_start_day+6) {
 167                 my @day=localtime(timelocal(0,0,0,$start_day++,$params{month}-1,$params{year}-1900));
 168                 my $downame = POSIX::strftime("%A", @day);
 169                 my $dowabbr = POSIX::strftime("%a", @day);
 170                 $downame{$dow % 7}=$downame;
 171                 $dowabbr{$dow % 7}=$dowabbr;
 172                 $calendar.= qq{\t\t<th class="month-calendar-day-head $downame">$dowabbr</th>\n};
 173         }
 174
 175         $calendar.=<<EOF;
 176         </tr>
 177 EOF
 178
 179         my $wday;
 180         # we start with a week_start_day, and skip until we get to the first
 181         for ($wday=$week_start_day; $wday != $monthstart[6]; $wday++, $wday %= 7) {
 182                 $calendar.=qq{\t<tr>\n} if $wday == $week_start_day;
 183                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 184         }
 185
 186         # At this point, either the first is a week_start_day, in which case
 187         # nothing has been printed, or else we are in the middle of a row.
 188         for (my $day = 1; $day <= month_days(year => $params{year}, month => $params{month});
 189              $day++, $wday++, $wday %= 7) {
 190                 # At tihs point, on a week_start_day, we close out a row,
 191                 # and start a new one -- unless it is week_start_day on the
 192                 # first, where we do not close a row -- since none was started.
 193                 if ($wday == $week_start_day) {
 194                         $calendar.=qq{\t</tr>\n} unless $day == 1;
 195                         $calendar.=qq{\t<tr>\n};
 196                 }
 197
 198                 my $tag;
 199                 if (defined $linkcache{"$params{year}/$params{month}/$day"}) {
 200                         if ($day == $today) {
 201                                 $tag='month-calendar-day-this-day';
 202                         }
 203                         else {
 204                                 $tag='month-calendar-day-link';
 205                         }
 206                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">};
 207                         $calendar.=htmllink($params{page}, $params{destpage},
 208                                             $linkcache{"$params{year}/$params{month}/$day"},
 209                                             "linktext" => "$day");
 210                         $calendar.=qq{</td>\n};
 211                 }
 212                 else {
 213                         if ($day == $today) {
 214                                 $tag='month-calendar-day-this-day';
 215                         }
 216                         elsif ($day == $future_dom) {
 217                                 $tag='month-calendar-day-future';
 218                         }
 219                         else {
 220                                 $tag='month-calendar-day-nolink';
 221                         }
 222                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">$day</td>\n};
 223                 }
 224         }
 225
 226         # finish off the week
 227         for (; $wday != $week_start_day; $wday++, $wday %= 7) {
 228                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 229         }
 230         $calendar.=<<EOF;
 231         </tr>
 232 </table>
 233 EOF
 234
 235         return $calendar;
 236 }
 237
 238 sub format_year (@) {
 239         my %params=@_;
 240
 241         my $calendar="\n";
 242
 243         my $pyear = $params{year}  - 1;
 244         my $nyear = $params{year}  + 1;
 245
 246         my $future_month = 0;
 247         $future_month = $now[4]+1 if ($params{year} == $now[5]+1900);
 248
 249         my $archivebase = 'archives';
 250         $archivebase = $config{archivebase} if defined $config{archivebase};
 251         $archivebase = $params{archivebase} if defined $params{archivebase};
 252
 253         # calculate URL's for previous and next years
 254         my ($url, $purl, $nurl)=("$params{year}",'','');
 255         if (exists $pagesources{"$archivebase/$params{year}"}) {
 256                 $url = htmllink($params{page}, $params{destpage},
 257                         "$archivebase/$params{year}",
 258                         linktext => "$params{year}");
 259         }
 260         add_depends($params{page}, "$archivebase/$params{year}", deptype("presence"));
 261         if (exists $pagesources{"$archivebase/$pyear"}) {
 262                 $purl = htmllink($params{page}, $params{destpage},
 263                         "$archivebase/$pyear",
 264                         linktext => "\&larr;");
 265         }
 266         add_depends($params{page}, "$archivebase/$pyear", deptype("presence"));
 267         if (exists $pagesources{"$archivebase/$nyear"}) {
 268                 $nurl = htmllink($params{page}, $params{destpage},
 269                         "$archivebase/$nyear",
 270                         linktext => "\&rarr;");
 271         }
 272         add_depends($params{page}, "$archivebase/$nyear", deptype("presence"));
 273
 274         # Start producing the year calendar
 275         $calendar=<<EOF;
 276 <table class="year-calendar">
 277         <caption class="year-calendar-head">
 278         $purl
 279         $url
 280         $nurl
 281         </caption>
 282         <tr>
 283                 <th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
 284         </tr>
 285 EOF
 286
 287         for (my $month = 1; $month <= 12; $month++) {
 288                 my @day=localtime(timelocal(0,0,0,15,$month-1,$params{year}-1900));
 289                 my $murl;
 290                 my $monthname = POSIX::strftime("%B", @day);
 291                 my $monthabbr = POSIX::strftime("%b", @day);
 292                 $calendar.=qq{\t<tr>\n}  if ($month % $params{months_per_row} == 1);
 293                 my $tag;
 294                 my $mtag=sprintf("%02d", $month);
 295                 if ($month == $params{month}) {
 296                         if ($pagesources{"$archivebase/$params{year}/$mtag"}) {
 297                                 $tag = 'this_month_link';
 298                         }
 299                         else {
 300                                 $tag = 'this_month_nolink';
 301                         }
 302                 }
 303                 elsif ($pagesources{"$archivebase/$params{year}/$mtag"}) {
 304                         $tag = 'month_link';
 305                 }
 306                 elsif ($future_month && $month >= $future_month) {
 307                         $tag = 'month_future';
 308                 }
 309                 else {
 310                         $tag = 'month_nolink';
 311                 }
 312
 313                 if ($pagesources{"$archivebase/$params{year}/$mtag"}) {
 314                         $murl = htmllink($params{page}, $params{destpage},
 315                                 "$archivebase/$params{year}/$mtag",
 316                                 linktext => "$monthabbr");
 317                         $calendar.=qq{\t<td class="$tag">};
 318                         $calendar.=$murl;
 319                         $calendar.=qq{\t</td>\n};
 320                 }
 321                 else {
 322                         $calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
 323                 }
 324                 add_depends($params{page}, "$archivebase/$params{year}/$mtag",
 325                         deptype("presence"));
 326
 327                 $calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
 328         }
 329
 330         $calendar.=<<EOF;
 331 </table>
 332 EOF
 333
 334         return $calendar;
 335 }
 336
 337 sub preprocess (@) {
 338         my %params=@_;
 339
 340         my $thisyear=1900 + $now[5];
 341         my $thismonth=1 + $now[4];
 342
 343         $params{pages} = "*"            unless defined $params{pages};
 344         $params{type}  = "month"        unless defined $params{type};
 345         $params{week_start_day} = 0     unless defined $params{week_start_day};
 346         $params{months_per_row} = 3     unless defined $params{months_per_row};
 347         $params{year}  = $thisyear      unless defined $params{year};
 348         $params{month} = $thismonth     unless defined $params{month};
 349
 350         $params{month} = sprintf("%02d", $params{month});
 351
 352         if ($params{type} eq 'month' && $params{year} == $thisyear
 353             && $params{month} == $thismonth) {
 354                 # calendar for current month, updates next midnight
 355                 $pagestate{$params{destpage}}{calendar}{nextchange}=($time
 356                         + (60 - $now[0])                # seconds
 357                         + (59 - $now[1]) * 60           # minutes
 358                         + (23 - $now[2]) * 60 * 60      # hours
 359                 );
 360         }
 361         elsif ($params{type} eq 'month' &&
 362                (($params{year} == $thisyear && $params{month} > $thismonth) ||
 363                 $params{year} > $thisyear)) {
 364                 # calendar for upcoming month, updates 1st of that month
 365                 $pagestate{$params{destpage}}{calendar}{nextchange}=
 366                         timelocal(0, 0, 0, 1, $params{month}-1, $params{year});
 367         }
 368         elsif ($params{type} eq 'year' && $params{year} == $thisyear) {
 369                 # calendar for current year, updates 1st of next month
 370                 $pagestate{$params{destpage}}{calendar}{nextchange}=
 371                         timelocal(0, 0, 0, 1, $thismonth+1-1, $params{year});
 372         }
 373         elsif ($params{type} eq 'year' && $params{year} > $thisyear) {
 374                 # calendar for upcoming year, updates 1st of that year
 375                 $pagestate{$params{destpage}}{calendar}{nextchange}=
 376                         timelocal(0, 0, 0, 1, 1-1, $params{year});
 377         }
 378         else {
 379                 # calendar for past month or year, does not need
 380                 # to update any more
 381                 delete $pagestate{$params{destpage}}{calendar};
 382         }
 383
 384         # Calculate month names for next month, and previous months
 385         my $calendar="";
 386         if ($params{type} eq 'month') {
 387                 $calendar=format_month(%params);
 388         }
 389         elsif ($params{type} eq 'year') {
 390                 $calendar=format_year(%params);
 391         }
 392
 393         return "\n<div><div class=\"calendar\">$calendar</div></div>\n";
 394 } #}}
 395
 396 sub needsbuild (@) {
 397         my $needsbuild=shift;
 398         foreach my $page (keys %pagestate) {
 399                 if (exists $pagestate{$page}{calendar}{nextchange}) {
 400                         if ($pagestate{$page}{calendar}{nextchange} <= $time) {
 401                                 # force a rebuild so the calendar shows
 402                                 # the current day
 403                                 push @$needsbuild, $pagesources{$page};
 404                         }
 405                         if (exists $pagesources{$page} &&
 406                             grep { $_ eq $pagesources{$page} } @$needsbuild) {
 407                                 # remove state, will be re-added if
 408                                 # the calendar is still there during the
 409                                 # rebuild
 410                                 delete $pagestate{$page}{calendar};
 411                         }
 412                 }
 413         }
 414 }
 415
 416 1