XHTMLCompiler/DOMFilter/RSSFromGit.php

   1 <?php
   2
   3 /**
   4  * GEnerates an RSS feed from a page's associated Git log.
   5  */
   6 class XHTMLCompiler_DOMFilter_RSSFromGit extends XHTMLCompiler_DOMFilter
   7 {
   8     protected $name = 'RSSFromGit';
   9     /** Number of log entries to display */
  10     protected $limit = 10;
  11     /** Description of changelog to place in feed title */
  12     protected $description = 'Git changelog for %s';
  13     /** Compact title to place in <link> and other places */
  14     protected $title = 'Log for %s';
  15     protected $xcAttr = array('rss-from-git');
  16
  17     public function process(DOMDocument $dom, $page, $manager) {
  18         $xc = XHTMLCompiler::getInstance();
  19         // implement gitweb/repo.or.cz support
  20
  21         $logs = $page->getLog();
  22
  23         // see if we need to make the link ourself
  24         $trigger = $this->confiscateAttr($dom->documentElement, $this->ns, 'rss-from-git');
  25         if ($trigger == 'yes') {
  26             // this shows up twice because we have to perform all
  27             // confiscations before aborting
  28             if (!$logs) return;
  29             $link = $dom->createElement('link');
  30             $link->setAttribute('rel', 'alternate');
  31             $link->setAttribute('type', 'application/rss+xml');
  32             $link->setAttribute('title', str_replace('%s', $page->getCachePath(), $this->title));
  33             $link->setAttribute('href', $page->getPathStem() . '.rss');
  34             $head = $this->query('//html:head')->item(0);
  35             $head->appendChild($link);
  36         } else {
  37             // grab the document's links to RSS feeds
  38             // link must be marked with xc:rss-from-svn
  39             // only one allowed
  40             $link = $this->query('//html:link[@xc:rss-from-svn]')->item(0);
  41             if (!$link) return; // nothing to do
  42
  43             $trigger = $this->confiscateAttr($link, $this->ns, 'rss-from-svn');
  44             if ($trigger != 'yes') return;
  45             if (!$logs) return;
  46         }
  47
  48         $path = $page->getWebPath();
  49
  50         $rss = new XHTMLCompiler_RSSFeed(
  51             $link->getAttribute('title'),
  52             $path,
  53             str_replace('%s', $page->getCachePath(), $this->description),
  54             $dom->documentElement->getAttribute('xml:lang')
  55         );
  56
  57         for ($i = 0; $i < $this->limit && isset($logs[$i]); $i++) {
  58             $commit = $logs[$i];
  59
  60             // :TODO: link to gitweb commitdiff
  61             $item_link = $path . '#git_' . $commit->id;
  62
  63             // generate short message (first line) for title\
  64
  65             $rss->addItem(
  66                 $item_link,
  67                 htmlspecialchars($commit->message),
  68                 $d = $commit->committedDate->format('r'),
  69                 // :TODO: Extend phpgit so that we can retrieve full message
  70                 htmlspecialchars($commit->message)
  71             );
  72         }
  73
  74         $rss->save(
  75             $page->normalizePath(
  76                 $link->getAttribute('href')
  77             )
  78         );
  79
  80
  81     }
  82 }