comment + link extraction

[stapibas.git] / src / stapibas / Content / Extractor / Base.php

diff --git a/src/stapibas/Content/Extractor/Base.php b/src/stapibas/Content/Extractor/Base.php
new file mode 100644 (file)
index 0000000..9288120
--- /dev/null
+++ b/src/stapibas/Content/Extractor/Base.php
@@ -0,0 +1,117 @@
+<?php
+namespace stapibas;
+
+class Content_Extractor_Base
+{
+    public function __construct(Logger $log)
+    {
+        $this->log = $log;
+    }
+
+    protected function extractAuthorData($hentry, $xpath, &$data, $source)
+    {
+        $data['author_name']  = null;
+        $data['author_image'] = null;
+        $data['author_url']   = null;
+
+        $authors = $xpath->evaluate(
+            './/*[' . $this->xpc('p-author') . ']'
+        );
+        if ($authors->length != 1) {
+            //no p-author, so use page author data
+            $data['author_name'] = $this->getFirst(
+                '/*[self::html or self::h:html]/*[self::head or self::h:head]'
+                . '/*[(self::meta or self::h:meta) and @name="author"]',
+                'content', $hentry, $xpath
+            );
+        
+            $data['author_url'] = 
+                $this->absUrl(
+                    $this->getFirst(
+                        '/*[self::html or self::h:html]/*[self::head or self::h:head]'
+                        . '/*[(self::link or self::h:link) and @rel="author"]',
+                        'href', $hentry, $xpath
+                    ),
+                    $source
+                );
+            return;
+        }
+
+        $author = $authors->item(0);
+
+        $data['author_name'] = $this->getFirst(
+            './/*[' . $this->xpc('p-name') . ' or ' . $this->xpc('fn') . ']',
+            null, $author, $xpath
+        );
+        $data['author_image'] = $this->getFirst(
+            './/*[' . $this->xpc('u-photo') . ']',
+            'src', $author, $xpath
+        );
+        $data['author_url'] = $this->absUrl(
+            $this->getFirst(
+                './/*[' . $this->xpc('u-url') . ']',
+                'href', $author, $xpath
+            ),
+            $source
+        );
+    }
+
+    protected function getFirst($xpathExpr, $attrName, $elem, $xpath)
+    {
+        $items = $xpath->evaluate($xpathExpr, $elem);
+        if (!$items instanceof \DOMNodeList || $items->length == 0) {
+            return null;
+        }
+
+        if ($attrName === false) {
+            return $items->item(0);
+        } else if ($attrName == null) {
+            return $items->item(0)->nodeValue;
+        } else {
+            return $items->item(0)->attributes->getNamedItem($attrName)->nodeValue;
+        }
+    }
+
+    protected function innerHtml($element)
+    {
+        $innerHTML = '';
+        $children = $element->childNodes;
+        foreach ($children as $child) {
+            $tmp_dom = new \DOMDocument();
+            $tmp_dom->appendChild($tmp_dom->importNode($child, true));
+            $innerHTML .= rtrim($tmp_dom->saveHTML(), "\n");
+        }
+        return trim($innerHTML);
+    }
+
+    protected function getXpath($node)
+    {
+        $xpath = new \DOMXPath($node);
+        $xpath->registerNamespace('h', 'http://www.w3.org/1999/xhtml');
+        return $xpath;
+    }
+
+    protected function xpc($class)
+    {
+        return 'contains('
+            . 'concat(" ", normalize-space(@class), " "),'
+            . '" ' . $class . ' "'
+            . ')';
+    }
+
+    protected function xpq($str)
+    {
+        return '"' . htmlspecialchars($str, ENT_QUOTES) . '"';
+    }
+
+    protected function absUrl($url, $source)
+    {
+        if ($url === null) {
+            return null;
+        }
+        $sourceUrl = new \Net_URL2($source);
+        return (string)$sourceUrl->resolve($url);
+    }
+
+}
+?>