INSTALL: explain better what "usable HTML" means in this context
[tweeper.git] / src / rss_converter_instagram.com.xsl
1 <!--
2   Stylesheet to convert Instagram user timelines to RSS.
3
4   Copyright (C) 2015  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 <xsl:stylesheet version="1.0"
22     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
23     xmlns:php="http://php.net/xsl"
24     xsl:extension-element-prefixes="php"
25     exclude-result-prefixes="php">
26
27     <xsl:param name="generate-enclosure"/>
28
29     <xsl:output method="xml" indent="yes"/>
30
31     <xsl:variable name="BaseURL">
32         <xsl:text>https://instagram.com</xsl:text>
33     </xsl:variable>
34
35     <xsl:variable name="user-name" select="//ProfilePage/user/username"/>
36
37     <!--
38          NOTE: some users do not specify the full name.
39
40          Remember to handle this case when using it and fall-back to the plain
41          user name when appropriate.
42     -->
43     <xsl:variable name="full-name" select="//ProfilePage/user/full_name"/>
44
45     <xsl:variable name="location-name" select="//LocationsPage/location/name"/>
46
47     <xsl:variable name="screen-name">
48         <xsl:choose>
49             <xsl:when test="$location-name != ''">
50                 <xsl:variable name="location-latitude" select="//LocationsPage/location/lat"/>
51                 <xsl:variable name="location-longitude" select="//LocationsPage/location/lng"/>
52                 <xsl:value-of select="concat($location-name, ' (', $location-latitude, ', ', $location-longitude, ')')"/>
53             </xsl:when>
54             <xsl:when test="$full-name != ''">
55                 <xsl:value-of select="$full-name"/>
56             </xsl:when>
57             <xsl:otherwise>
58                 <xsl:value-of select="$user-name"/>
59             </xsl:otherwise>
60         </xsl:choose>
61     </xsl:variable>
62
63     <xsl:template match="//media/nodes">
64         <xsl:variable name="item-content-image" select="./display_src"/>
65         <xsl:variable name="item-content-caption" select="./caption"/>
66         <xsl:variable name="item-permalink" select="concat($BaseURL, '/p/', ./code, '/')"/>
67         <item>
68             <title>
69                 <xsl:variable name="title-length" select="140"/>
70                 <xsl:variable name="item-content-title" select="normalize-space(concat($user-name, ': ', $item-content-caption))"/>
71                 <!-- ellipsize, inspired from http://stackoverflow.com/questions/13622338 -->
72                 <xsl:choose>
73                     <xsl:when test="string-length($item-content-title) > $title-length">
74                         <xsl:variable name="truncated-length" select="$title-length - 3"/>
75                         <xsl:value-of select="substring($item-content-title, 1, $truncated-length)"/>
76                         <xsl:text>...</xsl:text>
77                     </xsl:when>
78                     <xsl:otherwise>
79                         <xsl:value-of select="$item-content-title"/>
80                     </xsl:otherwise>
81                 </xsl:choose>
82             </title>
83             <link>
84                 <xsl:value-of select="$item-permalink"/>
85             </link>
86             <guid>
87                 <xsl:value-of select="$item-permalink"/>
88             </guid>
89             <pubDate>
90                 <xsl:variable name="timestamp" select="./date"/>
91                 <xsl:value-of select="php:functionString('Tweeper\Tweeper::epochToRssDate', $timestamp)"/>
92             </pubDate>
93             <description>
94                 <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
95                 <p>
96                     <xsl:if test="./is_video/text() = 1">
97                         (Video)
98                     </xsl:if>
99                     <xsl:value-of select="$item-content-caption"/>
100                 </p><br />
101                 <a href="{$item-permalink}"><img src="{$item-content-image}" style="max-width: 100%"/></a>
102                 <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
103             </description>
104             <xsl:if test="$generate-enclosure = 1">
105                 <xsl:copy-of select="php:functionString('Tweeper\Tweeper::generateEnclosure', $item-content-image)"/>
106             </xsl:if>
107         </item>
108     </xsl:template>
109
110     <xsl:template match="/">
111
112         <xsl:variable name="channel-title" select="concat('Instagram / ', $screen-name)"/>
113         <xsl:variable name="channel-link">
114             <xsl:choose>
115                 <xsl:when test="$location-name != ''">
116                     <xsl:variable name="location-id" select="//LocationsPage/location/id"/>
117                     <xsl:value-of select="concat($BaseURL, '/explore/locations/', $location-id)"/>
118                 </xsl:when>
119                 <xsl:otherwise>
120                     <xsl:value-of select="concat($BaseURL, '/', $user-name)"/>
121                 </xsl:otherwise>
122             </xsl:choose>
123         </xsl:variable>
124         <xsl:variable name="channel-image" select="//ProfilePage/user/profile_pic_url"/>
125
126         <rss version="2.0">
127             <xsl:attribute name="xml:base"><xsl:value-of select="$BaseURL" /></xsl:attribute>
128             <channel>
129                 <generator>Tweeper</generator>
130                 <title>
131                     <xsl:value-of select="$channel-title"/>
132                 </title>
133                 <link>
134                     <xsl:value-of select="$channel-link"/>
135                 </link>
136                 <description>
137                     <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
138                     <xsl:value-of select="normalize-space(concat($screen-name, '. ', //user/biography))"/>
139                     <xsl:variable name="external-url" select="//user/external_url"/>
140                     <xsl:if test="$external-url != ''">
141                         <xsl:text> </xsl:text><a href="{$external-url}"><xsl:value-of select="$external-url"/></a>
142                     </xsl:if>
143                     <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
144                 </description>
145                 <xsl:if test="$channel-image != ''">
146                     <image>
147                         <title>
148                             <xsl:value-of select="$channel-title"/>
149                         </title>
150                         <link>
151                             <xsl:value-of select="$channel-link"/>
152                         </link>
153                         <url>
154                             <xsl:value-of select="$channel-image"/>
155                         </url>
156                     </image>
157                 </xsl:if>
158                 <xsl:apply-templates select="//ProfilePage/user/media/nodes|//LocationsPage/location/media/nodes"/>
159             </channel>
160         </rss>
161     </xsl:template>
162 </xsl:stylesheet>