aboutsummaryrefslogtreecommitdiff
path: root/IkiWiki/Plugin/meta.pm
blob: 0afe1c3622561654bf682df6ea2e6d5b9551f135 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
#!/usr/bin/perl
# Ikiwiki metadata plugin.
package IkiWiki::Plugin::meta;

use warnings;
use strict;
use IkiWiki 2.00;

my %metaheaders;

sub import { #{{{
	hook(type => "needsbuild", id => "meta", call => \&needsbuild);
	hook(type => "preprocess", id => "meta", call => \&preprocess, scan => 1);
	hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
} # }}}

sub needsbuild (@) { #{{{
	my $needsbuild=shift;
	foreach my $page (keys %pagestate) {
		if (exists $pagestate{$page}{meta}) {
			if (exists $pagesources{$page} &&
			    grep { $_ eq $pagesources{$page} } @$needsbuild) {
				# remove state, it will be re-added
				# if the preprocessor directive is still
				# there during the rebuild
				delete $pagestate{$page}{meta};
			}
		}
	}
}

sub scrub ($) { #{{{
	if (IkiWiki::Plugin::htmlscrubber->can("sanitize")) {
		return IkiWiki::Plugin::htmlscrubber::sanitize(content => shift);
	}
	else {
		return shift;
	}
} #}}}

sub safeurl ($) { #{{{
	my $url=shift;
	if (exists $IkiWiki::Plugin::htmlscrubber::{safe_url_regexp} &&
	    defined $IkiWiki::Plugin::htmlscrubber::safe_url_regexp) {
		return $url=~/$IkiWiki::Plugin::htmlscrubber::safe_url_regexp/;
	}
	else {
		return 1;
	}
} #}}}

sub htmlize ($$$) { #{{{
	my $page = shift;
	my $destpage = shift;

	return IkiWiki::htmlize($page, pagetype($pagesources{$page}),
		IkiWiki::linkify($page, $destpage,
		IkiWiki::preprocess($page, $destpage, shift)));
}

sub preprocess (@) { #{{{
	return "" unless @_;
	my %params=@_;
	my $key=shift;
	my $value=$params{$key};
	delete $params{$key};
	my $page=$params{page};
	delete $params{page};
	my $destpage=$params{destpage};
	delete $params{destpage};
	delete $params{preview};

	eval q{use HTML::Entities};
	# Always decode, even if encoding later, since it might not be
	# fully encoded.
	$value=decode_entities($value);

	# Metadata collection that needs to happen during the scan pass.
	if ($key eq 'title') {
		$pagestate{$page}{meta}{title}=HTML::Entities::encode_numeric($value);
	}
	elsif ($key eq 'license') {
		push @{$metaheaders{$page}}, '<link rel="license" href="#page_license" />';
		$pagestate{$page}{meta}{license}=$value;
		return "";
	}
	elsif ($key eq 'copyright') {
		push @{$metaheaders{$page}}, '<link rel="copyright" href="#page_copyright" />';
		$pagestate{$page}{meta}{copyright}=$value;
		return "";
	}
	elsif ($key eq 'link' && ! %params) {
		# hidden WikiLink
		push @{$links{$page}}, $value;
		return "";
	}
	elsif ($key eq 'author') {
		$pagestate{$page}{meta}{author}=$value;
		# fallthorough
	}
	elsif ($key eq 'authorurl') {
		$pagestate{$page}{meta}{authorurl}=$value if safeurl($value);
		# fallthrough
	}

	if (! defined wantarray) {
		# avoid collecting duplicate data during scan pass
		return;
	}

	# Metadata collection that happens only during preprocessing pass.
	if ($key eq 'date') {
		eval q{use Date::Parse};
		if (! $@) {
			my $time = str2time($value);
			$IkiWiki::pagectime{$page}=$time if defined $time;
		}
	}
	elsif ($key eq 'permalink') {
		if (safeurl($value)) {
			$pagestate{$page}{meta}{permalink}=$value;
			push @{$metaheaders{$page}}, scrub('<link rel="bookmark" href="'.encode_entities($value).'" />');
		}
	}
	elsif ($key eq 'stylesheet') {
		my $rel=exists $params{rel} ? $params{rel} : "alternate stylesheet";
		my $title=exists $params{title} ? $params{title} : $value;
		# adding .css to the value prevents using any old web
		# editable page as a stylesheet
		my $stylesheet=bestlink($page, $value.".css");
		if (! length $stylesheet) {
			return "[[meta ".gettext("stylesheet not found")."]]";
		}
		push @{$metaheaders{$page}}, '<link href="'.urlto($stylesheet, $page).
			'" rel="'.encode_entities($rel).
			'" title="'.encode_entities($title).
			"\" type=\"text/css\" />";
	}
	elsif ($key eq 'openid') {
		if (exists $params{server} && safeurl($params{server})) {
			push @{$metaheaders{$page}}, '<link href="'.encode_entities($params{server}).
				'" rel="openid.server" />';
			push @{$metaheaders{$page}}, '<link href="'.encode_entities($params{server}).
				'" rel="openid2.provider" />';
		}
		if (safeurl($value)) {
			push @{$metaheaders{$page}}, '<link href="'.encode_entities($value).
				'" rel="openid.delegate" />';
			push @{$metaheaders{$page}}, '<link href="'.encode_entities($value).
				'" rel="openid2.local_id" />';
		}
		if (exists $params{"xrds-location"} && safeurl($params{"xrds-location"})) {
			push @{$metaheaders{$page}}, '<meta http-equiv="X-XRDS-Location"'.
				'content="'.encode_entities($params{"xrds-location"}).'" />';
		}
	}
	elsif ($key eq 'redir') {
		return "" if $page ne $destpage;
		my $safe=0;
		if ($value !~ /^\w+:\/\//) {
			my ($redir_page, $redir_anchor) = split /\#/, $value;

			add_depends($page, $redir_page);
			my $link=bestlink($page, $redir_page);
			if (! length $link) {
				return "[[meta ".gettext("redir page not found")."]]";
			}

			$value=urlto($link, $page);
			$value.='#'.$redir_anchor if defined $redir_anchor;
			$safe=1;

			# redir cycle detection
			$pagestate{$page}{meta}{redir}=$link;
			my $at=$page;
			my %seen;
			while (exists $pagestate{$at}{meta}{redir}) {
				if ($seen{$at}) {
					return "[[meta ".gettext("redir cycle is not allowed")."]]";
				}
				$seen{$at}=1;
				$at=$pagestate{$at}{meta}{redir};
			}
		}
		else {
			$value=encode_entities($value);
		}
		my $delay=int(exists $params{delay} ? $params{delay} : 0);
		my $redir="<meta http-equiv=\"refresh\" content=\"$delay; URL=$value\" />";
		if (! $safe) {
			$redir=scrub($redir);
		}
		push @{$metaheaders{$page}}, $redir;
	}
	elsif ($key eq 'link') {
		if (%params) {
			push @{$metaheaders{$page}}, scrub("<link href=\"".encode_entities($value)."\" ".
				join(" ", map {
					encode_entities($_)."=\"".encode_entities(decode_entities($params{$_}))."\""
				} keys %params).
				" />\n");
		}
	}
	elsif ($key eq 'robots') {
		push @{$metaheaders{$page}}, '<meta name="robots"'.
			' content="'.encode_entities($value).'" />';
	}
	else {
		push @{$metaheaders{$page}}, scrub('<meta name="'.encode_entities($key).
			'" content="'.encode_entities($value).'" />');
	}

	return "";
} # }}}

sub pagetemplate (@) { #{{{
	my %params=@_;
        my $page=$params{page};
        my $destpage=$params{destpage};
        my $template=$params{template};

	if (exists $metaheaders{$page} && $template->query(name => "meta")) {
		# avoid duplicate meta lines
		my %seen;
		$template->param(meta => join("\n", grep { (! $seen{$_}) && ($seen{$_}=1) } @{$metaheaders{$page}}));
	}
	if (exists $pagestate{$page}{meta}{title} && $template->query(name => "title")) {
		$template->param(title => $pagestate{$page}{meta}{title});
		$template->param(title_overridden => 1);
	}

	foreach my $field (qw{author authorurl permalink}) {
		$template->param($field => $pagestate{$page}{meta}{$field})
			if exists $pagestate{$page}{meta}{$field} && $template->query(name => $field);
	}

	foreach my $field (qw{license copyright}) {
		if (exists $pagestate{$page}{meta}{$field} && $template->query(name => $field) &&
		    ($page eq $destpage || ! exists $pagestate{$destpage}{meta}{$field} ||
		     $pagestate{$page}{meta}{$field} ne $pagestate{$destpage}{meta}{$field})) {
			$template->param($field => htmlize($page, $destpage, $pagestate{$page}{meta}{$field}));
		}
	}
} # }}}

sub match { #{{{
	my $field=shift;
	my $page=shift;
	
	# turn glob into a safe regexp
	my $re=quotemeta(shift);
	$re=~s/\\\*/.*/g;
	$re=~s/\\\?/./g;

	my $val;
	if (exists $pagestate{$page}{meta}{$field}) {
		$val=$pagestate{$page}{meta}{$field};
	}
	elsif ($field eq 'title') {
		$val=pagetitle($page);
	}

	if (defined $val) {
		if ($val=~/^$re$/i) {
			return IkiWiki::SuccessReason->new("$re matches $field of $page");
		}
		else {
			return IkiWiki::FailReason->new("$re does not match $field of $page");
		}
	}
	else {
		return IkiWiki::FailReason->new("$page does not have a $field");
	}
} #}}}

package IkiWiki::PageSpec;

sub match_title ($$;@) { #{{{
	IkiWiki::Plugin::meta::match("title", @_);	
} #}}}

sub match_author ($$;@) { #{{{
	IkiWiki::Plugin::meta::match("author", @_);
} #}}}

sub match_authorurl ($$;@) { #{{{
	IkiWiki::Plugin::meta::match("authorurl", @_);
} #}}}

sub match_license ($$;@) { #{{{
	IkiWiki::Plugin::meta::match("license", @_);
} #}}}

sub match_copyright ($$;@) { #{{{
	IkiWiki::Plugin::meta::match("copyright", @_);
} #}}}

1