implement RSS feed

public/index.php

@@ -8,6 +8,7 @@ $query = isset($_GET['q'])  ? preg_replace('/[\W\D\S]+/',     '', $_GET['q'])  :
 $ns    = isset($_GET['ns']) ? preg_replace('/[^a-zA-Z0-9]+/', '', $_GET['ns']) : false;
 $tx    = isset($_GET['tx']) ? preg_replace('/[^a-zA-Z0-9]+/', '', $_GET['tx']) : false;
 $page  = (int) isset($_GET['page']) ? $_GET['page'] : 0;
+$rss   = isset($_GET['rss']) ? true : false;
 
 if (SEF_MODE && isset($_SERVER['QUERY_STRING'])) {
 
@@ -62,9 +63,9 @@ foreach ($db->getData($ns, $tx, $query, $limit, PAGE_LIMIT) as $value) {
     'namehash' => $value['namehash'],
     'block'    => $value['block'],
     'txid'     => $value['txid'],
-    'time'     => date('d-m-Y H:i', $value['time']),
-    'key'      => nl2br(trim($value['key'])),
-    'value'    => nl2br(trim($value['value'])),
+    'time'     => date(($rss ? 'r' : 'd-m-Y H:i'), $value['time']),
+    'key'      => $rss ? htmlentities(strip_tags(trim($value['key'])), ENT_XML1) : nl2br(trim($value['key'])),
+    'value'    => $rss ? htmlentities(strip_tags(trim($value['value'])), ENT_XML1): nl2br(trim($value['value'])),
   ];
 }
 
@@ -127,4 +128,13 @@ if ($ns) {
   }
 }
 
-require_once('index.phtml');
+if ($rss) {
+
+  header('Content-type: application/xml');
+  require_once('rss.phtml');
+
+} else {
+
+  require_once('index.phtml');
+
+}

public/index.phtml

@@ -97,6 +97,9 @@
     </form>
   </div>
   <div class="t-center px-16 pb-27">
+    <?php if (!$tx) { ?>
+      <div class="pb-16 f-s-12"><a href="?rss">RSS</a></div>
+    <?php } ?>
     <div class="pb-16 f-s-12 c-1"><a href="https://github.com/kvazar-network/webapp">KVAZAR Webapp</a> is the content exploring platform for <a href="https://kevacoin.org">Kevacoin Blockchain</a>.</div>
     <div class="f-s-12 c-1">Sources distributed under the MIT License. Ownership of all content belongs to the authors.</div>
   </div>

public/rss.phtml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <atom:link href="<?php echo BASE_URL; ?>/?rss" rel="self" type="application/rss+xml" />
+    <title><?php echo $namespaceValue ? $namespaceValue : 'KVAZAR'; ?></title>
+    <description>Observe Kevacoin Universe</description>
+    <?php foreach ($data as $item) { ?>
+    <item>
+      <title><?php echo $item['key']; ?></title>
+      <guid><?php echo BASE_URL; ?>/<?php echo $item['txid']; ?></guid>
+      <pubDate><?php echo $item['time']; ?></pubDate>
+      <description><?php echo $item['value']; ?></description>
+    </item>
+    <?php } ?>
+  </channel>
+</rss>