From e6103791f528357197f8afb9ed222a9469cbd177 Mon Sep 17 00:00:00 2001
From: Thomas Lange <code@nerdmind.de>
Date: Tue, 20 Jul 2021 18:39:34 +0200
Subject: Implement new *content functions* feature (readme)

This commit implements a new feature called *content functions* that is
similar but much more powerful than the already existing *content tags*
which you may have already used (`{POST[1]}`, for example).

You now can also add your own *content functions* to do some interesting
things like embedding a YouTube video or other things to prevent typing
repetitive lines of text or code in your entities content.

Read the corresponding wiki page to learn more about this:
https://github.com/Nerdmind/Blog/wiki/Content-functions
---
 core/namespace/Application.php | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'core/namespace/Application.php')

diff --git a/core/namespace/Application.php b/core/namespace/Application.php
index 5690841..140baac 100644
--- a/core/namespace/Application.php
+++ b/core/namespace/Application.php
@@ -1,5 +1,6 @@
 <?php
 use ORM\EntityInterface;
+use Parsers\FunctionParser;
 
 class Application {
 
@@ -213,6 +214,18 @@ class Application {
 		}
 	}
 
+	#===============================================================================
+	# Add a custom content function
+	#===============================================================================
+	public static function addContentFunction(string $name, callable $callback): void {
+		if(!preg_match('#^([0-9A-Z_]+)$#', $name)) {
+			throw new Exception('The name for adding a content function must
+				contain only numbers, uppercase letters and underscores!');
+		}
+
+		FunctionParser::register($name, $callback);
+	}
+
 	#===============================================================================
 	# Exit application with a custom message and status code
 	#===============================================================================
-- 
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