Tweeper.php: fix Invalid Character Error when converting Instagram json to XML
[tweeper.git] / src / rss_converter_dilbert.com.xsl
1 <!--
2   Stylesheet to convert Dilbert daily strips to RSS.
3
4   Copyright (C) 2013-2018  Antonio Ospite <ao2@ao2.it>
5
6   This file is part of tweeper.
7
8   This program is free software: you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation, either version 3 of the License, or
11   (at your option) any later version.
12
13   This program is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 -->
21
22 <!--
23   Since June 18, 2013 dilbert.com strips are not accessible anymore
24   directly from the RSS feed, this message is displayed instead:
25
26     Dilbert readers - Please visit Dilbert.com to read this feature. Due
27     to changes with our feeds, we are now making this RSS feed a link to
28     Dilbert.com.
29
30   How unhandy is that, was it because of a management decision?
31   Maybe a parody dilbert strip is needed about this issue...
32 -->
33
34 <xsl:stylesheet version="1.0"
35     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
36     xmlns:php="http://php.net/xsl"
37     exclude-result-prefixes="php">
38
39     <xsl:param name="generate-enclosure"/>
40     <xsl:param name="show-multimedia"/>
41
42     <xsl:output method="xml" indent="yes"/>
43
44     <xsl:variable name="BaseURL" select="//meta[@property='og:url']/@content"/>
45
46     <xsl:template match="//section[@class='comic-item']">
47         <xsl:variable name="item-permalink" select=".//a[@class='img-comic-link']/@href"/>
48         <xsl:variable name="picture-url" select=".//img[@class='img-responsive img-comic']/@src"/>
49         <xsl:variable name="picture-title" select=".//img[@class='img-responsive img-comic']/@alt"/>
50         <item>
51             <title>
52                 <xsl:variable name="title-length" select="140"/>
53                 <!-- ellipsize, inspired from http://stackoverflow.com/questions/13622338 -->
54                 <xsl:choose>
55                     <xsl:when test="string-length($picture-title) > $title-length">
56                         <xsl:variable name="truncated-length" select="$title-length - 3"/>
57                         <xsl:value-of select="substring($picture-title, 1, $truncated-length)"/>
58                         <xsl:text>...</xsl:text>
59                     </xsl:when>
60                     <xsl:otherwise>
61                         <xsl:value-of select="$picture-title"/>
62                     </xsl:otherwise>
63                 </xsl:choose>
64             </title>
65             <link>
66                 <xsl:value-of select="$item-permalink"/>
67             </link>
68             <guid>
69                 <xsl:value-of select="$item-permalink"/>
70             </guid>
71             <pubDate>
72                 <xsl:value-of select="php:functionString('Tweeper\Tweeper::strToRssDate', normalize-space(.//date))"/>
73             </pubDate>
74             <description>
75                 <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
76                 <xsl:if test="$show-multimedia = 1">
77                     <img src="{$picture-url}" alt="{$picture-title}"/>
78                 </xsl:if>
79                 <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
80             </description>
81             <xsl:if test="$generate-enclosure = 1">
82                 <!--
83                     Dilbert.com uses protocol-relative urls for pictures but
84                     generateEnclosure() relies on curl which cannot work
85                     without a schema.
86
87                     Use http as protocol because curl gives some error when
88                     attempting TLS negotiation with the server where
89                     Dilbert.com assets are.
90                 -->
91                 <xsl:copy-of select="php:functionString('Tweeper\Tweeper::generateEnclosure', concat('http:', $picture-url))"/>
92             </xsl:if>
93         </item>
94     </xsl:template>
95
96     <xsl:template match="/">
97         <xsl:variable name="channel-title" select="//meta[@property='og:title']/@content"/>
98         <xsl:variable name="channel-link" select="$BaseURL"/>
99
100         <rss version="2.0">
101             <xsl:attribute name="xml:base"><xsl:value-of select="$BaseURL" /></xsl:attribute>
102             <channel>
103                 <generator>Tweeper</generator>
104                 <title>
105                     <xsl:value-of select="$channel-title"/>
106                 </title>
107                 <link>
108                     <xsl:value-of select="$channel-link"/>
109                 </link>
110                 <description>
111                     <xsl:value-of select="//meta[@property='og:description']/@content"/>
112                 </description>
113                 <image>
114                     <title>
115                         <xsl:value-of select="$channel-title"/>
116                     </title>
117                     <link>
118                         <xsl:value-of select="$channel-link"/>
119                     </link>
120                     <url>
121                         <xsl:value-of select="concat($BaseURL, //img[@alt='Dilbert logo']/@src)"/>
122                     </url>
123                 </image>
124                 <xsl:apply-templates select="//section[@class='comic-item']"/>
125             </channel>
126         </rss>
127     </xsl:template>
128 </xsl:stylesheet>