Read existing feed if present

lib/comic-page.php

@@ -0,0 +1,14 @@
+<?php
+declare(strict_types = 1);
+
+class ComicPage {
+    public string $href = '';
+    public string $pageNo = '';
+    public string $title = '';
+    public string $imageUrl = '';
+
+    function __construct() {}
+    function __toString() {
+        return "[{$this->href}] [{$this->imageUrl}] {$this->pageNo} // {$this->title}";
+    }
+};

lib/fetch-site-content.php

@@ -5,18 +5,7 @@ include_once('config/default.php');
 
 include_once('lib/log.php');
 include_once('lib/fetch-url.php');
-
-class ComicPage {
-    public string $href = '';
-    public string $pageNo = '';
-    public string $title = '';
-    public string $imageUrl = '';
-
-    function __construct() {}
-    function __toString() {
-        return "[{$this->href}] [{$this->imageUrl}] {$this->pageNo} // {$this->title}";
-    }
-};
+include_once('lib/comic-page.php');
 
 function fetchSiteContent() {
     $comicPages = array();

lib/generate-feed.php

@@ -25,11 +25,12 @@ function generateFeed($content) {
         ]);
 
         $items[] = $twig->render('item.xml', [
-            'title' => $page->title,
+            'title' => htmlspecialchars($page->title),
             'pageNo' => $page->pageNo,
             'fullTitle' => htmlspecialchars($page->pageNo . " // " . $page->title),
             'date' => $now,
             'url' => $page->href,
+            'imageUrl' => htmlspecialchars($page->imageUrl),
             'content' => htmlspecialchars($content)
         ]);
     };

lib/read-feed.php

@@ -0,0 +1,34 @@
+<?php
+declare(strict_types = 1);
+
+include_once('config/default.php');
+
+include_once('lib/comic-page.php');
+include_once('lib/log.php');
+
+function readFeed($path) {
+    $awfulSinging = file_get_contents($path);
+
+    if ($awfulSinging === false) {
+        Log::warn("Failed to read existing XML feed from " . $path);
+        return null;
+    };
+
+    Log::info("Read " . strlen($awfulSinging) . " bytes from " . $path);
+
+    $xml = simplexml_load_string($awfulSinging);
+
+    $items = array();
+    foreach ($xml->channel->item as $itemXml) {
+        $item = new ComicPage;
+        $item->href = (string) $itemXml->link;
+        $item->pageNo = (string) $itemXml['data-pageno'];
+        $item->title = (string) $itemXml['data-title'];
+        $item->imageUrl = (string) $itemXml['data-imageurl'];
+
+        print $item;
+        exit();
+
+        array_push($item);
+    };
+};

rssmonster.php

@@ -10,9 +10,11 @@ require_once('vendor/autoload.php');
 include_once('config/default.php');
 
 include_once('lib/log.php');
+include_once('lib/read-feed.php');
 include_once('lib/fetch-site-content.php');
 include_once('lib/generate-feed.php');
 
+$existingFeed = readFeed(Config::feedPath);
 $content = fetchSiteContent();
 $feedXml = generateFeed(array_reverse($content));
 

templates/item.xml

@@ -1,4 +1,7 @@
-<item data-pageno="{{ pageNo }}" data-title="{{ title }}">
+<item
+	data-pageno="{{ pageNo }}"
+	data-title="{{ title }}"
+	data-imageurl="{{ imageUrl }}">
   <title>{{ fullTitle }}</title>
   <description>{{ content }}</description>
   <pubDate>{{ date }}</pubDate>