+<!--
+ Stylesheet to convert a Facebook public page to RSS.
+
+ Copyright (C) 2015 Antonio Ospite <ao2@ao2.it>
+
+ This file is part of tweeper.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<!--
+ Since June 23rd, 2015 facebook.com deprecated the RSS feed endpoint for public pages:
+ https://developers.facebook.com/docs/apps/changelog#v2_3_90_day_deprecations
+
+ They suggest to use the Graph API but they fail to mention that it does not
+ work anymore without authentication, so it cannot be considered an
+ _equivalent_ solution.
+
+ Luckily we've got Tweeper!
+-->
+
+<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns:php="http://php.net/xsl"
+ xsl:extension-element-prefixes="php"
+ exclude-result-prefixes="php">
+
+ <xsl:output method="xml" indent="yes"/>
+
+ <xsl:variable name="BaseURL">
+ <xsl:text>https://facebook.com</xsl:text>
+ </xsl:variable>
+
+ <!--
+ Extract the page id from an element like:
+ <meta property="al:android:url" content="fb://page/793837197390834">
+
+ The page id will be used to build the permalink.
+ -->
+ <xsl:variable
+ name="page-id"
+ select="substring-after(//meta[@property='al:android:url']/@content, 'fb://page/')"/>
+
+ <xsl:template match="//div[contains(@class, 'userContentWrapper')]">
+ <xsl:variable name="story-id" select=".//input[@name='ft_ent_identifier']/@value"/>
+ <xsl:variable
+ name="item-permalink"
+ select="concat($BaseURL, '/permalink.php?id=', $page-id, '&story_fbid=', $story-id)"/>
+
+ <!-- Get only the first child in order to skip the footer of the content -->
+ <xsl:variable name="item-content" select="div[1]"/>
+
+ <item>
+ <title>
+ <xsl:variable name="item-title" select="$item-content//p"/>
+ <xsl:variable name="title-length" select="140"/>
+ <!-- ellipsize, inspired from http://stackoverflow.com/questions/13622338 -->
+ <xsl:choose>
+ <xsl:when test="string-length($item-title) > $title-length">
+ <xsl:variable name="truncated-length" select="$title-length - 3"/>
+ <xsl:value-of select="substring($item-title, 1, $truncated-length)"/>
+ <xsl:text>...</xsl:text>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:value-of select="$item-title"/>
+ </xsl:otherwise>
+ </xsl:choose>
+ </title>
+ <link>
+ <xsl:value-of select="$item-permalink"/>
+ </link>
+ <guid>
+ <xsl:value-of select="$item-permalink"/>
+ </guid>
+ <pubDate>
+ <xsl:variable name="timestamp" select=".//abbr[@data-shorten]/@data-utime"/>
+ <xsl:value-of select="php:functionString('Tweeper::epochToRssDate', $timestamp)"/>
+ </pubDate>
+ <description>
+
+ <!--
+ Get only the children starting from the one with class="userContent",
+ this way the content header is skipped
+ -->
+ <xsl:variable
+ name="usercontent-position"
+ select="count($item-content/div[contains(@class, 'userContent')]/preceding-sibling::*) + 1"/>
+
+ <xsl:text disable-output-escaping="yes"><![CDATA[</xsl:text>
+ <xsl:copy-of select="$item-content/div[position() >= $usercontent-position]"/>
+ <xsl:text disable-output-escaping="yes">]]></xsl:text>
+ </description>
+ </item>
+ </xsl:template>
+
+ <xsl:template match="/">
+ <xsl:variable name="channel-title" select="//title"/>
+ <xsl:variable name="channel-link" select="//div[contains(@class, 'userContentWrapper')][1]//a[1]/@href"/>
+
+ <rss version="2.0">
+ <xsl:attribute name="xml:base"><xsl:value-of select="$BaseURL" /></xsl:attribute>
+ <channel>
+ <generator>Tweeper</generator>
+ <title>
+ <xsl:value-of select="$channel-title"/>
+ </title>
+ <link>
+ <xsl:value-of select="$channel-link"/>
+ </link>
+ <description>
+ <xsl:text disable-output-escaping="yes"><![CDATA[</xsl:text>
+ <xsl:copy-of select="//div[@data-id='1']/node()"/>
+ <xsl:text disable-output-escaping="yes">]]></xsl:text>
+ </description>
+ <image>
+ <title>
+ <xsl:value-of select="$channel-title"/>
+ </title>
+ <link>
+ <xsl:value-of select="$channel-link"/>
+ </link>
+ <url>
+ <xsl:value-of select="//img[@class='profilePic img']/@src"/>
+ </url>
+ </image>
+ <xsl:apply-templates select="//div[contains(@class, 'userContentWrapper')]"/>
+ </channel>
+ </rss>
+ </xsl:template>
+</xsl:stylesheet>
projects / tweeper.git / blobdiff