feat:#34 refactored function to intended service, fixed docker files

services/data-manager/service/functions/string.go

@@ -0,0 +1,62 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package functions
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"strings"
+)
+
+// check if string is empty or contains only whitespaces
+func OnlyWhitespace(word string) bool {
+	return len(strings.TrimSpace(word)) == 0
+}
+
+// return function to check if rune is a separator
+func IsSeparator(separator []rune) func(rune) bool {
+	return func(character rune) bool {
+		for _, sep := range separator {
+			if sep == character {
+				return true
+			}
+		}
+		return false
+	}
+}
+
+func Contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+func HashString(s string) string {
+	hash := sha256.New()
+	hash.Write([]byte(s))
+	hashInBytes := hash.Sum(nil)
+	return hex.EncodeToString(hashInBytes)
+}
+
+func SeperateRoomString(rooms string) []string {
+	return strings.FieldsFunc(rooms, IsSeparator(
+		[]rune{',', '\t', '\n', '\r', ';', ' ', '\u00A0'}),
+	)
+}