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#!/usr/bin/perl
package IkiWiki::Plugin::flattr;
use warnings;
use strict;
use IkiWiki 3.00;
sub import {
hook(type => "getsetup", id => "flattr", call => \&getsetup);
hook(type => "preprocess", id => "flattr", call => \&preprocess);
hook(type => "format", id => "flattr", call => \&format);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => undef,
},
flattr_userid => {
type => "string",
example => 'joeyh',
description => "userid or user name to use by default for Flattr buttons",
advanced => 0,
safe => 1,
rebuild => undef,
},
}
my %flattr_pages;
sub preprocess (@) {
my %params=@_;
$flattr_pages{$params{destpage}}=1;
my $url=$params{url};
if (! defined $url) {
$url=urlto($params{page}, "", 1);
}
my @fields;
foreach my $field (qw{language uid button hidden category tags}) {
if (exists $params{$field}) {
push @fields, "$field:$params{$field}";
}
}
return '<a class="FlattrButton" href="'.$url.'"'.
(exists $params{title} ? ' title="'.$params{title}.'"' : '').
' rev="flattr;'.join(';', @fields).';"'.
'>'.
(exists $params{description} ? $params{description} : '').
'</a>';
}
sub format (@) {
my %params=@_;
# Add flattr's javascript to pages with flattr buttons.
if ($flattr_pages{$params{page}}) {
if (! ($params{content}=~s!^(<body[^>]*>)!$1.flattrjs()!em)) {
# no <body> tag, probably in preview mode
$params{content}=flattrjs().$params{content};
}
}
return $params{content};
}
my $js_cached;
sub flattrjs {
return $js_cached if defined $js_cached;
my $js_url='https://api.flattr.com/js/0.5.0/load.js?mode=auto';
if (defined $config{flattr_userid}) {
my $userid=$config{flattr_userid};
$userid=~s/[^-A-Za-z0-9_]//g; # sanitize for inclusion in javascript
$js_url.="&uid=$userid";
}
# This is Flattr's standard javascript snippet to include their
# external javascript file, asynchronously.
return $js_cached=<<"EOF";
<script type="text/javascript">
<!--//--><![CDATA[//><!--
(function() {
var s = document.createElement('script'), t = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.async = true;
s.src = '$js_url';
t.parentNode.insertBefore(s, t);
})();//--><!]]>
</script>
EOF
}
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