This function remove all non alpha numerical characters from a string
and substitute this characters with one -

So HELLO%%/$&/)%$%(&&HH becomes hello-hh

Signed-off-by: Jonatan Schlag <jonatan.schlag(a)ipfire.org>
---
 src/functions/functions.util | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/functions/functions.util b/src/functions/functions.util
index 24e3e66..8df0d86 100644
--- a/src/functions/functions.util
+++ b/src/functions/functions.util
@@ -845,3 +845,13 @@ copy() {
 		return ${EXIT_ERROR}
 	fi
 }
+
+
+normalize() {
+	assert [ $# -eq 1 ]
+
+	local string="${1}"
+
+	string="${string,,}"
+	tr -sc [:alnum:] "-" < <(printf "%s" "${string}")
+}
-- 
2.6.3