ShortenString added

stringFunctions.go

@@ -0,0 +1,28 @@
+/**
+= Creative Commons Lizenzvertrag =
+ebktools von der archium GmbH, Gera ist lizenziert unter einer Creative Commons Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International Lizenz. (http://creativecommons.org/licenses/by-nc-nd/4.0/deed.de)
+Individuelle über diese Lizenz hinausgehende Berechtigungen können Sie unter https://archium.org erhalten.
+
+= Creative Commons License =
+ebktools by archium GmbH, Gera is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. (http://creativecommons.org/licenses/by-nc-nd/4.0/)
+Individual permissions beyond the scope of this license may be available at https://archium.org.
+**/
+package ebkTools
+
+import "math"
+
+// ShortenString() shortens String in them MIDDLE and inserts a surrogate. It ist possible to prevent shortening, if maximum stringlength is inside a tolerance space
+// 	fmt.Println(shortenString("abcdefghi",6,2,"[…]")) //a[…]hi
+func ShortenString(input string, lengthmax, tolerance int, surrogate string) (output string) {
+	if len(input) > int(lengthmax+tolerance) && lengthmax != 0 {
+
+		charstodelete := (float64(lengthmax) / 2) - (float64(len(surrogate)) / 2)
+		front := input[0 : int(math.Floor(charstodelete))+1]
+		rear := input[len(input)-int(math.Ceil(charstodelete))-1:]
+		output = front + surrogate + rear
+	} else {
+		output = input
+	}
+
+	return
+}