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                         section => "widget",
  42                 },
  43                 archivebase => {
  44                         type => "string",
  45                         example => "archives",
  46                         description => "base of the archives hierarchy",
  47                         safe => 1,
  48                         rebuild => 1,
  49                 },
  50                 archive_pagespec => {
  51                         type => "pagespec",
  52                         example => "page(posts/*) and !*/Discussion",
  53                         description => "PageSpec of pages to include in the archives; used by ikiwiki-calendar command",
  54                         link => 'ikiwiki/PageSpec',
  55                         safe => 1,
  56                         rebuild => 0,
  57                 },
  58 }
  59
  60 sub is_leap_year (@) {
  61         my %params=@_;
  62         return ($params{year} % 4 == 0 && (($params{year} % 100 != 0) || $params{year} % 400 == 0));
  63 }
  64
  65 sub month_days {
  66         my %params=@_;
  67         my $days_in_month = (31,28,31,30,31,30,31,31,30,31,30,31)[$params{month}-1];
  68         if ($params{month} == 2 && is_leap_year(%params)) {
  69                 $days_in_month++;
  70         }
  71         return $days_in_month;
  72 }
  73
  74 sub format_month (@) {
  75         my %params=@_;
  76
  77         my %linkcache;
  78         foreach my $p (pagespec_match_list($params{page},
  79                                 "creation_year($params{year}) and creation_month($params{month}) and ($params{pages})",
  80                                 # add presence dependencies to update
  81                                 # month calendar when pages are added/removed
  82                                 deptype => deptype("presence"))) {
  83                 my $mtime = $IkiWiki::pagectime{$p};
  84                 my @date  = localtime($mtime);
  85                 my $mday  = $date[3];
  86                 my $month = $date[4] + 1;
  87                 my $year  = $date[5] + 1900;
  88                 my $mtag  = sprintf("%02d", $month);
  89
  90                 # Only one posting per day is being linked to.
  91                 $linkcache{"$year/$mtag/$mday"} = $p;
  92         }
  93
  94         my $pmonth = $params{month} - 1;
  95         my $nmonth = $params{month} + 1;
  96         my $pyear  = $params{year};
  97         my $nyear  = $params{year};
  98
  99         # Adjust for January and December
 100         if ($params{month} == 1) {
 101                 $pmonth = 12;
 102                 $pyear--;
 103         }
 104         if ($params{month} == 12) {
 105                 $nmonth = 1;
 106                 $nyear++;
 107         }
 108
 109         # Add padding.
 110         $pmonth=sprintf("%02d", $pmonth);
 111         $nmonth=sprintf("%02d", $nmonth);
 112
 113         my $calendar="\n";
 114
 115         # When did this month start?
 116         my @monthstart = localtime(timelocal(0,0,0,1,$params{month}-1,$params{year}-1900));
 117
 118         my $future_dom = 0;
 119         my $today      = 0;
 120         if ($params{year} == $now[5]+1900 && $params{month} == $now[4]+1) {
 121                 $future_dom = $now[3]+1;
 122                 $today      = $now[3];
 123         }
 124
 125         # Find out month names for this, next, and previous months
 126         my $monthabbrev=POSIX::strftime("%b", @monthstart);
 127         my $monthname=POSIX::strftime("%B", @monthstart);
 128         my $pmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
 129         my $nmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));
 130
 131         my $archivebase = 'archives';
 132         $archivebase = $config{archivebase} if defined $config{archivebase};
 133         $archivebase = $params{archivebase} if defined $params{archivebase};
 134
 135         # Calculate URL's for monthly archives.
 136         my ($url, $purl, $nurl)=("$monthname $params{year}",'','');
 137         if (exists $pagesources{"$archivebase/$params{year}/$params{month}"}) {
 138                 $url = htmllink($params{page}, $params{destpage},
 139                         "$archivebase/$params{year}/".$params{month},
 140                         noimageinline => 1,
 141                         linktext => "$monthabbrev $params{year}",
 142                         title => $monthname);
 143         }
 144         add_depends($params{page}, "$archivebase/$params{year}/$params{month}",
 145                 deptype("presence"));
 146         if (exists $pagesources{"$archivebase/$pyear/$pmonth"}) {
 147                 $purl = htmllink($params{page}, $params{destpage},
 148                         "$archivebase/$pyear/$pmonth",
 149                         noimageinline => 1,
 150                         linktext => "\&larr;",
 151                         title => $pmonthname);
 152         }
 153         add_depends($params{page}, "$archivebase/$pyear/$pmonth",
 154                 deptype("presence"));
 155         if (exists $pagesources{"$archivebase/$nyear/$nmonth"}) {
 156                 $nurl = htmllink($params{page}, $params{destpage},
 157                         "$archivebase/$nyear/$nmonth",
 158                         noimageinline => 1,
 159                         linktext => "\&rarr;",
 160                         title => $nmonthname);
 161         }
 162         add_depends($params{page}, "$archivebase/$nyear/$nmonth",
 163                 deptype("presence"));
 164
 165         # Start producing the month calendar
 166         $calendar=<<EOF;
 167 <table class="month-calendar">
 168         <tr>
 169         <th class="month-calendar-arrow">$purl</th>
 170         <th class="month-calendar-head" colspan="5">$url</th>
 171         <th class="month-calendar-arrow">$nurl</th>
 172         </tr>
 173         <tr>
 174 EOF
 175
 176         # Suppose we want to start the week with day $week_start_day
 177         # If $monthstart[6] == 1
 178         my $week_start_day = $params{week_start_day};
 179
 180         my $start_day = 1 + (7 - $monthstart[6] + $week_start_day) % 7;
 181         my %downame;
 182         my %dowabbr;
 183         for my $dow ($week_start_day..$week_start_day+6) {
 184                 my @day=localtime(timelocal(0,0,0,$start_day++,$params{month}-1,$params{year}-1900));
 185                 my $downame = POSIX::strftime("%A", @day);
 186                 my $dowabbr = substr($downame, 0, 1);
 187                 $downame{$dow % 7}=$downame;
 188                 $dowabbr{$dow % 7}=$dowabbr;
 189                 $calendar.= qq{\t\t<th class="month-calendar-day-head $downame" title="$downame">$dowabbr</th>\n};
 190         }
 191
 192         $calendar.=<<EOF;
 193         </tr>
 194 EOF
 195
 196         my $wday;
 197         # we start with a week_start_day, and skip until we get to the first
 198         for ($wday=$week_start_day; $wday != $monthstart[6]; $wday++, $wday %= 7) {
 199                 $calendar.=qq{\t<tr>\n} if $wday == $week_start_day;
 200                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 201         }
 202
 203         # At this point, either the first is a week_start_day, in which case
 204         # nothing has been printed, or else we are in the middle of a row.
 205         for (my $day = 1; $day <= month_days(year => $params{year}, month => $params{month});
 206              $day++, $wday++, $wday %= 7) {
 207                 # At this point, on a week_start_day, we close out a row,
 208                 # and start a new one -- unless it is week_start_day on the
 209                 # first, where we do not close a row -- since none was started.
 210                 if ($wday == $week_start_day) {
 211                         $calendar.=qq{\t</tr>\n} unless $day == 1;
 212                         $calendar.=qq{\t<tr>\n};
 213                 }
 214
 215                 my $tag;
 216                 my $key="$params{year}/$params{month}/$day";
 217                 if (defined $linkcache{$key}) {
 218                         if ($day == $today) {
 219                                 $tag='month-calendar-day-this-day';
 220                         }
 221                         else {
 222                                 $tag='month-calendar-day-link';
 223                         }
 224                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">};
 225                         $calendar.=htmllink($params{page}, $params{destpage},
 226                                 $linkcache{$key},
 227                                 noimageinline => 1,
 228                                 linktext => $day,
 229                                 title => pagetitle(IkiWiki::basename($linkcache{$key})));
 230                         $calendar.=qq{</td>\n};
 231                 }
 232                 else {
 233                         if ($day == $today) {
 234                                 $tag='month-calendar-day-this-day';
 235                         }
 236                         elsif ($day == $future_dom) {
 237                                 $tag='month-calendar-day-future';
 238                         }
 239                         else {
 240                                 $tag='month-calendar-day-nolink';
 241                         }
 242                         $calendar.=qq{\t\t<td class="$tag $downame{$wday}">$day</td>\n};
 243                 }
 244         }
 245
 246         # finish off the week
 247         for (; $wday != $week_start_day; $wday++, $wday %= 7) {
 248                 $calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}">&nbsp;</td>\n};
 249         }
 250         $calendar.=<<EOF;
 251         </tr>
 252 </table>
 253 EOF
 254
 255         return $calendar;
 256 }
 257
 258 sub format_year (@) {
 259         my %params=@_;
 260
 261         my @post_months;
 262         foreach my $p (pagespec_match_list($params{page},
 263                                 "creation_year($params{year}) and ($params{pages})",
 264                                 # add presence dependencies to update
 265                                 # year calendar's links to months when
 266                                 # pages are added/removed
 267                                 deptype => deptype("presence"))) {
 268                 my $mtime = $IkiWiki::pagectime{$p};
 269                 my @date  = localtime($mtime);
 270                 my $month = $date[4] + 1;
 271
 272                 $post_months[$month]++;
 273         }
 274
 275         my $calendar="\n";
 276
 277         my $pyear = $params{year}  - 1;
 278         my $nyear = $params{year}  + 1;
 279
 280         my $thisyear = $now[5]+1900;
 281         my $future_month = 0;
 282         $future_month = $now[4]+1 if $params{year} == $thisyear;
 283
 284         my $archivebase = 'archives';
 285         $archivebase = $config{archivebase} if defined $config{archivebase};
 286         $archivebase = $params{archivebase} if defined $params{archivebase};
 287
 288         # calculate URL's for previous and next years
 289         my ($url, $purl, $nurl)=("$params{year}",'','');
 290         if (exists $pagesources{"$archivebase/$params{year}"}) {
 291                 $url = htmllink($params{page}, $params{destpage},
 292                         "$archivebase/$params{year}",
 293                         noimageinline => 1,
 294                         linktext => $params{year},
 295                         title => $params{year});
 296         }
 297         add_depends($params{page}, "$archivebase/$params{year}", deptype("presence"));
 298         if (exists $pagesources{"$archivebase/$pyear"}) {
 299                 $purl = htmllink($params{page}, $params{destpage},
 300                         "$archivebase/$pyear",
 301                         noimageinline => 1,
 302                         linktext => "\&larr;",
 303                         title => $pyear);
 304         }
 305         add_depends($params{page}, "$archivebase/$pyear", deptype("presence"));
 306         if (exists $pagesources{"$archivebase/$nyear"}) {
 307                 $nurl = htmllink($params{page}, $params{destpage},
 308                         "$archivebase/$nyear",
 309                         noimageinline => 1,
 310                         linktext => "\&rarr;",
 311                         title => $nyear);
 312         }
 313         add_depends($params{page}, "$archivebase/$nyear", deptype("presence"));
 314
 315         # Start producing the year calendar
 316         my $m=$params{months_per_row}-2;
 317         $calendar=<<EOF;
 318 <table class="year-calendar">
 319         <tr>
 320         <th class="year-calendar-arrow">$purl</th>
 321         <th class="year-calendar-head" colspan="$m">$url</th>
 322         <th class="year-calendar-arrow">$nurl</th>
 323         </tr>
 324         <tr>
 325                 <th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
 326         </tr>
 327 EOF
 328
 329         for (my $month = 1; $month <= 12; $month++) {
 330                 my @day=localtime(timelocal(0,0,0,15,$month-1,$params{year}-1900));
 331                 my $murl;
 332                 my $monthname = POSIX::strftime("%B", @day);
 333                 my $monthabbr = POSIX::strftime("%b", @day);
 334                 $calendar.=qq{\t<tr>\n}  if ($month % $params{months_per_row} == 1);
 335                 my $tag;
 336                 my $mtag=sprintf("%02d", $month);
 337                 if ($month == $params{month} && $thisyear == $params{year}) {
 338                         $tag = 'year-calendar-this-month';
 339                 }
 340                 elsif ($pagesources{"$archivebase/$params{year}/$mtag"}) {
 341                         $tag = 'year-calendar-month-link';
 342                 }
 343                 elsif ($future_month && $month >= $future_month) {
 344                         $tag = 'year-calendar-month-future';
 345                 }
 346                 else {
 347                         $tag = 'year-calendar-month-nolink';
 348                 }
 349
 350                 if ($pagesources{"$archivebase/$params{year}/$mtag"} &&
 351                     $post_months[$mtag]) {
 352                         $murl = htmllink($params{page}, $params{destpage},
 353                                 "$archivebase/$params{year}/$mtag",
 354                                 noimageinline => 1,
 355                                 linktext => $monthabbr,
 356                                 title => $monthname);
 357                         $calendar.=qq{\t<td class="$tag">};
 358                         $calendar.=$murl;
 359                         $calendar.=qq{\t</td>\n};
 360                 }
 361                 else {
 362                         $calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
 363                 }
 364                 add_depends($params{page}, "$archivebase/$params{year}/$mtag",
 365                         deptype("presence"));
 366
 367                 $calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
 368         }
 369
 370         $calendar.=<<EOF;
 371 </table>
 372 EOF
 373
 374         return $calendar;
 375 }
 376
 377 sub setnextchange ($$) {
 378         my $page=shift;
 379         my $timestamp=shift;
 380
 381         if (! exists $pagestate{$page}{calendar}{nextchange} ||
 382             $pagestate{$page}{calendar}{nextchange} > $timestamp) {
 383                 $pagestate{$page}{calendar}{nextchange}=$timestamp;
 384         }
 385 }
 386
 387 sub preprocess (@) {
 388         my %params=@_;
 389
 390         my $thisyear=1900 + $now[5];
 391         my $thismonth=1 + $now[4];
 392
 393         $params{pages} = "*"            unless defined $params{pages};
 394         $params{type}  = "month"        unless defined $params{type};
 395         $params{week_start_day} = 0     unless defined $params{week_start_day};
 396         $params{months_per_row} = 3     unless defined $params{months_per_row};
 397         $params{year}  = $thisyear      unless defined $params{year};
 398         $params{month} = $thismonth     unless defined $params{month};
 399
 400         my $relativeyear=0;
 401         if ($params{year} < 1) {
 402                 $relativeyear=1;
 403                 $params{year}=$thisyear+$params{year};
 404         }
 405         my $relativemonth=0;
 406         if ($params{month} < 1) {
 407                 $relativemonth=1;
 408                 my $monthoff=$params{month};
 409                 $params{month}=($thismonth+$monthoff) % 12;
 410                 $params{month}=12 if $params{month}==0;
 411                 my $yearoff=POSIX::ceil(($thismonth-$params{month}) / -12)
 412                         - int($monthoff / 12);
 413                 $params{year}-=$yearoff;
 414         }
 415
 416         $params{month} = sprintf("%02d", $params{month});
 417
 418         if ($params{type} eq 'month' && $params{year} == $thisyear
 419             && $params{month} == $thismonth) {
 420                 # calendar for current month, updates next midnight
 421                 setnextchange($params{destpage}, ($time
 422                         + (60 - $now[0])                # seconds
 423                         + (59 - $now[1]) * 60           # minutes
 424                         + (23 - $now[2]) * 60 * 60      # hours
 425                 ));
 426         }
 427         elsif ($params{type} eq 'month' &&
 428                (($params{year} == $thisyear && $params{month} > $thismonth) ||
 429                 $params{year} > $thisyear)) {
 430                 # calendar for upcoming month, updates 1st of that month
 431                 setnextchange($params{destpage},
 432                         timelocal(0, 0, 0, 1, $params{month}-1, $params{year}));
 433         }
 434         elsif (($params{type} eq 'year' && $params{year} == $thisyear) ||
 435                $relativemonth) {
 436                 # Calendar for current year updates 1st of next month.
 437                 # Any calendar relative to the current month also updates
 438                 # then.
 439                 if ($thismonth < 12) {
 440                         setnextchange($params{destpage},
 441                                 timelocal(0, 0, 0, 1, $thismonth+1-1, $params{year}));
 442                 }
 443                 else {
 444                         setnextchange($params{destpage},
 445                                 timelocal(0, 0, 0, 1, 1-1, $params{year}+1));
 446                 }
 447         }
 448         elsif ($relativeyear) {
 449                 # Any calendar relative to the current year updates 1st
 450                 # of next year.
 451                 setnextchange($params{destpage},
 452                         timelocal(0, 0, 0, 1, 1-1, $thisyear+1));
 453         }
 454         elsif ($params{type} eq 'year' && $params{year} > $thisyear) {
 455                 # calendar for upcoming year, updates 1st of that year
 456                 setnextchange($params{destpage},
 457                         timelocal(0, 0, 0, 1, 1-1, $params{year}));
 458         }
 459         else {
 460                 # calendar for past month or year, does not need
 461                 # to update any more
 462                 delete $pagestate{$params{destpage}}{calendar};
 463         }
 464
 465         my $calendar="";
 466         if ($params{type} eq 'month') {
 467                 $calendar=format_month(%params);
 468         }
 469         elsif ($params{type} eq 'year') {
 470                 $calendar=format_year(%params);
 471         }
 472
 473         return "\n<div><div class=\"calendar\">$calendar</div></div>\n";
 474 } #}}
 475
 476 sub needsbuild (@) {
 477         my $needsbuild=shift;
 478         foreach my $page (keys %pagestate) {
 479                 if (exists $pagestate{$page}{calendar}{nextchange}) {
 480                         if ($pagestate{$page}{calendar}{nextchange} <= $time) {
 481                                 # force a rebuild so the calendar shows
 482                                 # the current day
 483                                 push @$needsbuild, $pagesources{$page};
 484                         }
 485                         if (exists $pagesources{$page} &&
 486                             grep { $_ eq $pagesources{$page} } @$needsbuild) {
 487                                 # remove state, will be re-added if
 488                                 # the calendar is still there during the
 489                                 # rebuild
 490                                 delete $pagestate{$page}{calendar};
 491                         }
 492                 }
 493         }
 494 }
 495
 496 1