new project structure

- use objects and inheritance
- enabled combined version for drinking and loading bar without impacting any of them

zeitlaeufer/src/main/java/de/szimnau/SimpleLoadingBar.java

@@ -0,0 +1,108 @@
+package de.szimnau;
+
+import de.szimnau.tools.FormatTools;
+import java.time.LocalTime;
+import java.util.*;
+
+import static de.szimnau.tools.CommonTools.println;
+
+
+public class SimpleLoadingBar extends AbstractProgressBar {
+
+   private final String title;
+
+
+   private SimpleLoadingBar(LocalTime startTime, LocalTime endTime, String title) {
+      super(startTime, endTime);
+      this.title = initTitle(title);
+   }
+
+
+   public static void main(String[] args) {
+      if (args.length > 0 && Objects.equals(args[0], "--help")) {
+         printHelp();
+         return;
+      }
+      verifyMinimumNumberOfArgs(args);
+      String nextArg = args[0];
+      verifyTimeFormat(nextArg, "Erstes Argument");
+      var firstTime = LocalTime.parse(nextArg, FormatTools.TIME_FORMATTER);
+      LocalTime startTime = null;
+      String title = "";
+      LocalTime endTime = null;
+      if (args.length > 1) {
+         nextArg = args[1];
+         if ("-msg".equals(nextArg)) {
+            title = args.length > 2 ? args[2] : title;
+         } else {
+            verifyTimeFormat(nextArg, "Zweites Argument");
+            endTime = LocalTime.parse(nextArg, FormatTools.TIME_FORMATTER);
+         }
+      }
+      if (endTime == null) {
+         startTime = LocalTime.now();
+         endTime = firstTime;
+      } else {
+         startTime = firstTime;
+      }
+      if (args.length == 2 || !title.isBlank()) {
+         new SimpleLoadingBar(startTime, endTime, title).showLoadingBar();
+         return;
+      }
+      // if there are 3 arguments, the third will be discarded.
+      boolean hasTitleArg = args.length > 3 && "-msg".equals(args[2]);
+      title = hasTitleArg ? args[3] : title;
+      new SimpleLoadingBar(startTime, endTime, title).showLoadingBar();
+   }
+
+
+   private static void printHelp() {
+      println("Mögliche Argumente für LoadingBar:\n"
+          + "Startzeit, Endzeit, Endnachricht (Optional)\n"
+          + FormatTools.TIME_FORMAT + " " + FormatTools.TIME_FORMAT + " -msg <Nachricht>\n"
+          + "Endzeit (Startzeit = jetzt), Endnachricht (Optional)\n"
+          + FormatTools.TIME_FORMAT + " -msg <Nachricht>\n"
+      );
+   }
+
+
+   private static void verifyMinimumNumberOfArgs(String[] args) {
+      if (args.length >= 1) {
+         return;
+      }
+      println("Mindestens 1 Argument muss gegeben sein.");
+      printHelp();
+      System.exit(1);
+   }
+
+
+   private static void verifyTimeFormat(String param, String errMsgPrefix) {
+      if (FormatTools.TIME_PATTERN.matcher(param).matches()) {
+         return;
+      }
+      println(errMsgPrefix + " \"" + param + "\" muss Uhrzeitformat (" + FormatTools.TIME_FORMAT + ") entsprechen.");
+      System.exit(1);
+   }
+
+
+   private String initTitle(String inputTitle) {
+      String fallbackTitle = "Ende! Endzeit " + FormatTools.TIME_FORMATTER.format(getEndTime()) + " erreicht.";
+      String effectiveTitle = inputTitle == null || inputTitle.isBlank() ? fallbackTitle : inputTitle;
+      String separator = "*".repeat(effectiveTitle.length());
+      return separator + "\n" + effectiveTitle + "\n" + separator;
+   }
+
+
+   @Override
+   protected void showLoadingBar() {
+      showLoadingBar();
+      // showLoadingBarDebug(); // DEBUG
+      println(title);
+   }
+
+
+   private String formatTitle(String title) {
+      String separator = "*".repeat(title.length());
+      return separator + "\n" + title + "\n" + separator;
+   }
+}