feat: create the RSS feed class, all rss feeds are instances of this class

It provides the appropriate namespace map, alternate property xpath selector expressions that are
used in parsing rss feeds

Author: Harrison Ifeanyichukwu

src/Feeds/RSSFeed.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types = 1);
+
+namespace Forensic\FeedParser\Feeds;
+
+use Forensic\FeedParser\Enums\FeedTypes;
+use Forensic\FeedParser\XPath;
+use Forensic\FeedParser\FeedItems\RSSFeedItem;
+
+class RSSFeed extends BaseFeed
+{
+    public function __construct(XPath $xpath, string $default_lang,
+        bool $remove_styles, bool $remove_scripts)
+    {
+        $namespaces = [
+            'def' => 'http://purl.org/rss/1.0/',
+            'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
+            'dc' => 'http://purl.org/dc/elements/1.1/',
+            'sy' => 'http://purl.org/rss/1.0/modules/syndication',
+            'enc' => 'http://purl.oclc.org/net/rss_2.0/enc#',
+            'content' => 'http://purl.org/rss/1.0/modules/content/',
+            'taxo' => 'http://purl.org/rss/1.0/modules/taxonomy/'
+        ];
+
+        $property_selectors = [
+            'id' => 'channel/title',
+            'title' => 'channel/title',
+            'link' => 'channel/link',
+            'description' => 'channel/description',
+            'image' => [
+                'src' => 'channel/image/url',
+                'link' => 'channel/image/link',
+                'title' => 'channel/image/title'
+            ],
+            'copyright' => 'channel/copyright',
+            'publisher' => 'channel/managingEditor || channel/webMaster',
+            'lastUpdated' => 'channel/pubDate',
+            'generator' => 'channel/generator',
+            'language' => 'channel/language',
+            'category' => 'channel/category'
+        ];
+
+        $items_selector = 'channel/item';
+
+        parent::__construct(
+            new FeedTypes(FeedTypes::RSS_FEED),
+            $default_lang,
+            $xpath,
+            $namespaces,
+            $property_selectors,
+            $items_selector,
+            $remove_styles,
+            $remove_scripts
+        );
+    }
+}