420 lines
12 KiB
Perl
420 lines
12 KiB
Perl
#! /usr/bin/perl
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# Copyright (c) 2006, 2007 Manoj Srivastava <srivasta@debian.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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require 5.002;
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package IkiWiki::Plugin::calendar;
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use warnings;
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use strict;
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use IkiWiki 3.00;
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use Time::Local;
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use POSIX;
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my %cache;
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my %linkcache;
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my $time=time;
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my @now=localtime($time);
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sub import {
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hook(type => "getsetup", id => "calendar", call => \&getsetup);
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hook(type => "needsbuild", id => "calendar", call => \&needsbuild);
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hook(type => "preprocess", id => "calendar", call => \&preprocess);
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}
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sub getsetup () {
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return
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plugin => {
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safe => 1,
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rebuild => undef,
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},
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archivebase => {
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type => "string",
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example => "archives",
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description => "base of the archives hierarchy",
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safe => 1,
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rebuild => 1,
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},
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}
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sub is_leap_year (@) {
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my %params=@_;
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return ($params{year} % 4 == 0 && (($params{year} % 100 != 0) || $params{year} % 400 == 0));
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}
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sub month_days {
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my %params=@_;
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my $days_in_month = (31,28,31,30,31,30,31,31,30,31,30,31)[$params{month}-1];
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if ($params{month} == 2 && is_leap_year(%params)) {
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$days_in_month++;
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}
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return $days_in_month;
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}
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sub format_month (@) {
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my %params=@_;
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my $pagespec = $params{pages};
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my $year = $params{year};
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my $month = $params{month};
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my $pmonth = $params{pmonth};
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my $nmonth = $params{nmonth};
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my $pyear = $params{pyear};
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my $nyear = $params{nyear};
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my @list;
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my $calendar="\n";
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# When did this month start?
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my @monthstart = localtime(timelocal(0,0,0,1,$month-1,$year-1900));
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my $future_dom = 0;
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my $today = 0;
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if ($year == $now[5]+1900 && $month == $now[4]+1) {
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$future_dom = $now[3]+1;
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$today = $now[3];
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}
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# Find out month names for this, next, and previous months
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my $monthname=POSIX::strftime("%B", @monthstart);
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my $pmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
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my $nmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));
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my $archivebase = 'archives';
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$archivebase = $config{archivebase} if defined $config{archivebase};
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$archivebase = $params{archivebase} if defined $params{archivebase};
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# Calculate URL's for monthly archives.
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my ($url, $purl, $nurl)=("$monthname",'','');
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if (exists $cache{$pagespec}{"$year/$month"}) {
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$url = htmllink($params{page}, $params{destpage},
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"$archivebase/$year/".sprintf("%02d", $month),
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linktext => " $monthname ");
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}
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add_depends($params{page}, "$archivebase/$year/".sprintf("%02d", $month));
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if (exists $cache{$pagespec}{"$pyear/$pmonth"}) {
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$purl = htmllink($params{page}, $params{destpage},
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"$archivebase/$pyear/" . sprintf("%02d", $pmonth),
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linktext => " $pmonthname ");
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}
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add_depends($params{page}, "$archivebase/$pyear/".sprintf("%02d", $pmonth));
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if (exists $cache{$pagespec}{"$nyear/$nmonth"}) {
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$nurl = htmllink($params{page}, $params{destpage},
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"$archivebase/$nyear/" . sprintf("%02d", $nmonth),
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linktext => " $nmonthname ");
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}
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add_depends($params{page}, "$archivebase/$nyear/".sprintf("%02d", $nmonth));
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# Start producing the month calendar
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$calendar=<<EOF;
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<table class="month-calendar">
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<caption class="month-calendar-head">
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$purl
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$url
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$nurl
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</caption>
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<tr>
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EOF
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# Suppose we want to start the week with day $week_start_day
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# If $monthstart[6] == 1
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my $week_start_day = $params{week_start_day};
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my $start_day = 1 + (7 - $monthstart[6] + $week_start_day) % 7;
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my %downame;
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my %dowabbr;
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for my $dow ($week_start_day..$week_start_day+6) {
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my @day=localtime(timelocal(0,0,0,$start_day++,$month-1,$year-1900));
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my $downame = POSIX::strftime("%A", @day);
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my $dowabbr = POSIX::strftime("%a", @day);
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$downame{$dow % 7}=$downame;
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$dowabbr{$dow % 7}=$dowabbr;
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$calendar.= qq{\t\t<th class="month-calendar-day-head $downame">$dowabbr</th>\n};
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}
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$calendar.=<<EOF;
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</tr>
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EOF
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my $wday;
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# we start with a week_start_day, and skip until we get to the first
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for ($wday=$week_start_day; $wday != $monthstart[6]; $wday++, $wday %= 7) {
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$calendar.=qq{\t<tr>\n} if $wday == $week_start_day;
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$calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}"> </td>\n};
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}
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# At this point, either the first is a week_start_day, in which case
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# nothing has been printed, or else we are in the middle of a row.
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for (my $day = 1; $day <= month_days(year => $year, month => $month);
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$day++, $wday++, $wday %= 7) {
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# At tihs point, on a week_start_day, we close out a row,
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# and start a new one -- unless it is week_start_day on the
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# first, where we do not close a row -- since none was started.
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if ($wday == $week_start_day) {
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$calendar.=qq{\t</tr>\n} unless $day == 1;
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$calendar.=qq{\t<tr>\n};
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}
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my $tag;
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my $mtag = sprintf("%02d", $month);
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if (defined $cache{$pagespec}{"$year/$mtag/$day"}) {
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if ($day == $today) {
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$tag='month-calendar-day-this-day';
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}
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else {
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$tag='month-calendar-day-link';
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}
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$calendar.=qq{\t\t<td class="$tag $downame{$wday}">};
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$calendar.=htmllink($params{page}, $params{destpage},
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pagename($linkcache{"$year/$mtag/$day"}),
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"linktext" => "$day");
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push @list, pagename($linkcache{"$year/$mtag/$day"});
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$calendar.=qq{</td>\n};
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}
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else {
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if ($day == $today) {
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$tag='month-calendar-day-this-day';
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}
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elsif ($day == $future_dom) {
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$tag='month-calendar-day-future';
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}
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else {
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$tag='month-calendar-day-nolink';
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}
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$calendar.=qq{\t\t<td class="$tag $downame{$wday}">$day</td>\n};
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}
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}
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# finish off the week
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for (; $wday != $week_start_day; $wday++, $wday %= 7) {
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$calendar.=qq{\t\t<td class="month-calendar-day-noday $downame{$wday}"> </td>\n};
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}
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$calendar.=<<EOF;
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</tr>
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</table>
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EOF
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# Add dependencies to update the calendar whenever pages
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# matching the pagespec are added or removed.
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add_depends($params{page}, $params{pages});
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# Explicitly add all currently linked pages as dependencies, so
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# that if they are removed, the calendar will be sure to be updated.
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add_depends($params{page}, join(" or ", @list));
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return $calendar;
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}
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sub format_year (@) {
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my %params=@_;
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my $pagespec = $params{pages};
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my $year = $params{year};
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my $month = $params{month};
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my $pmonth = $params{pmonth};
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my $nmonth = $params{nmonth};
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my $pyear = $params{pyear};
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my $nyear = $params{nyear};
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my $calendar="\n";
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my $future_month = 0;
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$future_month = $now[4]+1 if ($year == $now[5]+1900);
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my $archivebase = 'archives';
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$archivebase = $config{archivebase} if defined $config{archivebase};
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$archivebase = $params{archivebase} if defined $params{archivebase};
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# calculate URL's for previous and next years
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my ($url, $purl, $nurl)=("$year",'','');
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if (exists $cache{$pagespec}{"$year"}) {
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$url = htmllink($params{page}, $params{destpage},
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"$archivebase/$year",
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linktext => "$year");
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}
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add_depends($params{page}, "$archivebase/$year");
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if (exists $cache{$pagespec}{"$pyear"}) {
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$purl = htmllink($params{page}, $params{destpage},
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"$archivebase/$pyear",
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linktext => "\←");
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}
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add_depends($params{page}, "$archivebase/$pyear");
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if (exists $cache{$pagespec}{"$nyear"}) {
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$nurl = htmllink($params{page}, $params{destpage},
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"$archivebase/$nyear",
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linktext => "\→");
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}
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add_depends($params{page}, "$archivebase/$nyear");
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# Start producing the year calendar
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$calendar=<<EOF;
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<table class="year-calendar">
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<caption class="year-calendar-head">
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$purl
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$url
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$nurl
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</caption>
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<tr>
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<th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
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</tr>
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EOF
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for ($month = 1; $month <= 12; $month++) {
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my @day=localtime(timelocal(0,0,0,15,$month-1,$year-1900));
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my $murl;
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my $monthname = POSIX::strftime("%B", @day);
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my $monthabbr = POSIX::strftime("%b", @day);
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$calendar.=qq{\t<tr>\n} if ($month % $params{months_per_row} == 1);
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my $tag;
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my $mtag=sprintf("%02d", $month);
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if ($month == $params{month}) {
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if ($cache{$pagespec}{"$year/$mtag"}) {
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$tag = 'this_month_link';
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}
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else {
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$tag = 'this_month_nolink';
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}
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}
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elsif ($cache{$pagespec}{"$year/$mtag"}) {
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$tag = 'month_link';
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}
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elsif ($future_month && $month >= $future_month) {
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$tag = 'month_future';
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}
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else {
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$tag = 'month_nolink';
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}
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if ($cache{$pagespec}{"$year/$mtag"}) {
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$murl = htmllink($params{page}, $params{destpage},
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"$archivebase/$year/$mtag",
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linktext => "$monthabbr");
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$calendar.=qq{\t<td class="$tag">};
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$calendar.=$murl;
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$calendar.=qq{\t</td>\n};
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}
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else {
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$calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
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}
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add_depends($params{page}, "$archivebase/$year/$mtag");
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$calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
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}
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$calendar.=<<EOF;
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</table>
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EOF
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return $calendar;
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}
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sub preprocess (@) {
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my %params=@_;
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$params{pages} = "*" unless defined $params{pages};
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$params{type} = "month" unless defined $params{type};
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$params{month} = sprintf("%02d", $params{month}) if defined $params{month};
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$params{week_start_day} = 0 unless defined $params{week_start_day};
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$params{months_per_row} = 3 unless defined $params{months_per_row};
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if (! defined $params{year} || ! defined $params{month}) {
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# Record that the calendar next changes at midnight.
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$pagestate{$params{destpage}}{calendar}{nextchange}=($time
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+ (60 - $now[0]) # seconds
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+ (59 - $now[1]) * 60 # minutes
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+ (23 - $now[2]) * 60 * 60 # hours
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);
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$params{year} = 1900 + $now[5] unless defined $params{year};
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$params{month} = 1 + $now[4] unless defined $params{month};
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}
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else {
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delete $pagestate{$params{destpage}}{calendar};
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}
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# Calculate month names for next month, and previous months
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my $pmonth = $params{month} - 1;
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my $nmonth = $params{month} + 1;
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my $pyear = $params{year} - 1;
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my $nyear = $params{year} + 1;
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# Adjust for January and December
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if ($params{month} == 1) {
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$pmonth = 12;
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$pyear--;
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}
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if ($params{month} == 12) {
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$nmonth = 1;
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$nyear++;
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}
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$params{pmonth}=$pmonth;
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$params{nmonth}=$nmonth;
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$params{pyear} =$pyear;
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$params{nyear} =$nyear;
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my $calendar="\n";
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my $pagespec=$params{pages};
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my $page =$params{page};
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if (! defined $cache{$pagespec}) {
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foreach my $p (pagespec_match_list([keys %pagesources], $pagespec)) {
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my $mtime = $IkiWiki::pagectime{$p};
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my $src = $pagesources{$p};
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my @date = localtime($mtime);
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my $mday = $date[3];
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my $month = $date[4] + 1;
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my $year = $date[5] + 1900;
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my $mtag = sprintf("%02d", $month);
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# Only one posting per day is being linked to.
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$linkcache{"$year/$mtag/$mday"} = "$src";
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$cache{$pagespec}{"$year"}++;
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$cache{$pagespec}{"$year/$mtag"}++;
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$cache{$pagespec}{"$year/$mtag/$mday"}++;
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}
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}
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if ($params{type} =~ /month/i) {
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$calendar=format_month(%params);
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}
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elsif ($params{type} =~ /year/i) {
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$calendar=format_year(%params);
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}
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return "\n<div><div class=\"calendar\">$calendar</div></div>\n";
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} #}}
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sub needsbuild (@) {
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my $needsbuild=shift;
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foreach my $page (keys %pagestate) {
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if (exists $pagestate{$page}{calendar}{nextchange}) {
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if ($pagestate{$page}{calendar}{nextchange} <= $time) {
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# force a rebuild so the calendar shows
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# the current day
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push @$needsbuild, $pagesources{$page};
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}
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if (exists $pagesources{$page} &&
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grep { $_ eq $pagesources{$page} } @$needsbuild) {
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# remove state, will be re-added if
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# the calendar is still there during the
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# rebuild
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delete $pagestate{$page}{calendar};
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}
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}
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}
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}
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1
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