comment + link extraction

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

diff --git a/src/stapibas/Content/Extractor/Link.php b/src/stapibas/Content/Extractor/Link.php
new file mode 100644 (file)
index 0000000..91bdb31
--- /dev/null
+++ b/src/stapibas/Content/Extractor/Link.php
@@ -0,0 +1,67 @@
+<?php
+namespace stapibas;
+
+class Content_Extractor_Link extends Content_Extractor_Base
+{
+    /**
+     * Try to extract link data from HTML
+     *
+     * @param object $doc HTML
+     * @param string $source URL this HTML has been loaded from
+     * @param string $target URL the reply should be to
+     *
+     * @return mixed NULL if nothing found, array if ok
+     */
+    public function extract(\DOMDocument $doc, $source, $target)
+    {
+        $xpath = $this->getXpath($doc);
+        $hentries = $xpath->query(
+            '//*[(' . $this->xpc('h-entry') . ' or ' . $this->xpc('hentry') . ')'
+            . ' and //*[' . $this->xpc('e-content') . ']'
+            . ']'
+        );
+
+        $sourceUrl = new \Net_URL2($source);
+        $found = false;
+
+        foreach ($hentries as $hentry) {
+            $links = $xpath->query('.//*[self::a or self::h:a]', $hentry);
+            foreach ($links as $link) {
+                $url = (string)$sourceUrl->resolve(
+                    $link->attributes->getNamedItem('href')->nodeValue
+                );
+                if ($url == $target) {
+                    $found = true;
+                    break 2;
+                }
+            }
+        }
+
+        if (!$found) {
+            return null;
+        }
+
+        $data = array('title' => null);
+        $hentry = $hentries->item(0);
+
+        $this->extractAuthorData($hentry, $xpath, $data, $source);
+        $data['title'] = trim(
+            $this->getFirst(
+                './/*[' . $this->xpc('p-name') . ']', null, $hentry, $xpath
+            )
+        );
+        if ($data['title'] === null) {
+            //use page title
+            $data['title'] = trim(
+                $this->getFirst(
+                    '/*[self::html or self::h:html]/*[self::head or self::h:head]'
+                    . '/*[self::title or self::h:title]',
+                    null, $hentry, $xpath
+                )
+            );
+        }
+
+        return $data;
+    }
+}
+?>