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vendor/fguillot/picofeed/lib/PicoFeed/Scraper/RuleParser.php

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+<?php
+
+namespace PicoFeed\Scraper;
+
+use DOMXPath;
+use PicoFeed\Parser\XmlParser;
+
+/**
+ * Rule Parser.
+ *
+ * @author  Frederic Guillot
+ */
+class RuleParser implements ParserInterface
+{
+    private $dom;
+    private $xpath;
+    private $rules = array();
+
+    /**
+     * Constructor.
+     *
+     * @param string $html
+     * @param array  $rules
+     */
+    public function __construct($html, array $rules)
+    {
+        $this->rules = $rules;
+        $this->dom = XmlParser::getHtmlDocument('<?xml version="1.0" encoding="UTF-8">'.$html);
+        $this->xpath = new DOMXPath($this->dom);
+    }
+
+    /**
+     * Get the relevant content with predefined rules.
+     *
+     * @return string
+     */
+    public function execute()
+    {
+        $this->stripTags();
+
+        return $this->findContent();
+    }
+
+    /**
+     * Remove HTML tags.
+     */
+    public function stripTags()
+    {
+        if (isset($this->rules['strip']) && is_array($this->rules['strip'])) {
+            foreach ($this->rules['strip'] as $pattern) {
+                $nodes = $this->xpath->query($pattern);
+
+                if ($nodes !== false && $nodes->length > 0) {
+                    foreach ($nodes as $node) {
+                        $node->parentNode->removeChild($node);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Fetch content based on Xpath rules.
+     */
+    public function findContent()
+    {
+        $content = '';
+
+        if (isset($this->rules['body']) && is_array($this->rules['body'])) {
+            foreach ($this->rules['body'] as $pattern) {
+                $nodes = $this->xpath->query($pattern);
+
+                if ($nodes !== false && $nodes->length > 0) {
+                    foreach ($nodes as $node) {
+                        $content .= $this->dom->saveXML($node);
+                    }
+                }
+            }
+        }
+
+        return $content;
+    }
+}