From 55db406401e3c4137ebd97489393dade78b21c41 Mon Sep 17 00:00:00 2001
From: Joshua Ramon Enslin <joshua@museum-digital.de>
Date: Fri, 4 Sep 2020 00:46:45 +0200
Subject: [PATCH] Add wrappers for sanitizing URLs and mail addresses

---
 MD_STD_IN.php | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/MD_STD_IN.php b/MD_STD_IN.php
index 9816e5e..4a648e5 100644
--- a/MD_STD_IN.php
+++ b/MD_STD_IN.php
@@ -136,4 +136,44 @@ final class MD_STD_IN {
 
     }
 
+    /**
+     * Sanitizes and validates a URL. An empty string passes.
+     *
+     * @param mixed $input Input string.
+     *
+     * @return string
+     */
+    final public static function sanitize_url($input):string {
+
+        if ($input === "") return $input;
+
+        $output = \filter_var($input, FILTER_SANITIZE_URL);
+        if (\filter_var($input, FILTER_VALIDATE_URL) === false) {
+            throw new MDInvalidUrl("Invalid input URL");
+        }
+
+        return $output;
+
+    }
+
+    /**
+     * Sanitizes and validates an e-mail address. An empty string passes.
+     *
+     * @param mixed $input Input string.
+     *
+     * @return string
+     */
+    final public static function sanitize_email($input):string {
+
+        if ($input === "") return $input;
+
+        $output = \filter_var($input, FILTER_SANITIZE_EMAIL);
+        if (\filter_var($input, FILTER_VALIDATE_EMAIL) === false) {
+            throw new MDInvalidEmail("Invalid input email address");
+        }
+
+        return $output;
+
+    }
+
 }