implemented importer für Bandhaus Leipzug

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.base/src/main/java/de/srsoftware/cal/Util.java

@@ -11,8 +11,12 @@ import de.srsoftware.cal.api.Coords;
 import de.srsoftware.tools.Payload;
 import de.srsoftware.tools.Result;
 import de.srsoftware.tools.Tag;
+
+import java.io.IOException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
@@ -75,6 +79,14 @@ public class Util {
 		return String.join("\r\n",lines);
 	}
 
+	public static void dump(Tag tag){
+		try {
+			Files.writeString(Path.of("/tmp/dump.txt"),tag.toString(4));
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
 	public static Result<Coords> extractCoords(String coords) {
 		if (coords == null) return error("Argument is null");
 		if (coords.isBlank()) return error("Argument is blank");
@@ -197,6 +209,14 @@ public class Util {
 		}
 	}
 
+	public static Result<Integer> parseInt(String s){
+		try {
+			return Payload.of(Integer.parseInt(s));
+		} catch (NumberFormatException e){
+			return error(e,"Failed to parse %s as integer!",s);
+		}
+	}
+
 	public static Result<URL> url(Result<String> urlResult) {
 		if (urlResult.optional().isEmpty()) return transform(urlResult);
 		var url = urlResult.optional().get();