Add TextDocument as layout for simple text snippet files, such as robots.txt

Author: technicalguru

src/WebApp/DefaultTheme/TextDocument.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace WebApp\DefaultTheme;
+
+/** Returns the output of the page as a pure text */
+class TextDocument extends \WebApp\Layout {
+
+	public function __construct($theme, $page) {
+		parent::__construct($theme, $page);
+	}
+
+	public function renderPage() {
+		header('Content-Type: text/plain');
+		$rc = $this->page->getMain();
+		if ($rc == NULL) $rc = '';
+		if (!is_string($rc)) {
+			if (is_array($rc)) $rc = implode("\n", $rc);
+			else $rc = 'Invalid content detected.';
+		}
+		return $rc;
+	}
+}
+