helper methods for printing to stdout

LoadingBar.java

@@ -75,27 +75,36 @@ public class LoadingBar {
 
    private static void askParametersAndRun() throws IOException {
       var br = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
-      System.out.print("Ankunftszeit: ");
+      print("Ankunftszeit: ");
       String startTimeRaw = br.readLine();
-      var startTime = LocalTime.parse(startTimeRaw, TIME_FORMATTER);
+      var startTime = LocalTime.parse(startTimeRaw, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
       handleMittagspause(br, startTime);
       handleZapfenstreich(br, startTime);
    }
 
 
+   private static void println(Object o) {
+      System.out.println(o);
+   }
+
+
+   private static void print(Object o) {
+      System.out.print(o);
+   }
+
 
    private static void handleMittagspause(BufferedReader br, LocalTime startTime) throws IOException {
-      System.out.print("Mittagspause verschieben um (optional): ");
+      print("Mittagspause verschieben um (optional): ");
       String mittagspauseOffsetRaw = br.readLine();
       if (mittagspauseOffsetRaw != null && !mittagspauseOffsetRaw.isBlank()) {
          var mittagspauseOffset = Integer.parseInt(mittagspauseOffsetRaw);
          showLoadingBarMittagspause(startTime, mittagspauseOffset);
          return;
       }
-      System.out.print("Mittagspause um (optional): ");
+      print("Mittagspause um (optional): ");
       String manualMittagspauseRaw = br.readLine();
       if (manualMittagspauseRaw != null && !manualMittagspauseRaw.isBlank()) {
-         var manualMittagspause = LocalTime.parse(manualMittagspauseRaw, TIME_FORMATTER);
+         var manualMittagspause = LocalTime.parse(manualMittagspauseRaw, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
          showLoadingBarMittagspause(startTime, manualMittagspause);
       } else {
          showLoadingBarMittagspause(startTime);
@@ -104,13 +113,13 @@ public class LoadingBar {
 
 
    private static void handleZapfenstreich(BufferedReader br, LocalTime startTime) throws IOException {
-      System.out.print("Mittagspause hat gedauert (optional): ");
+      print("Mittagspause hat gedauert (optional): ");
       String mittagspauseDurationRaw = br.readLine();
       Integer mittagspauseDuration = null;
       if (mittagspauseDurationRaw != null && !mittagspauseDurationRaw.isBlank()) {
          mittagspauseDuration = Integer.valueOf(mittagspauseDurationRaw);
       }
-      System.out.print("Feierabend verschieben um (optional): ");
+      print("Feierabend verschieben um (optional): ");
       String zapfenstreichOffsetRaw = br.readLine();
       Integer zapfenstreichOffset = null;
       if (zapfenstreichOffsetRaw != null && !zapfenstreichOffsetRaw.isBlank()) {
@@ -118,11 +127,11 @@ public class LoadingBar {
          showLoadingBarZapfenstreich(startTime, mittagspauseDuration, zapfenstreichOffset);
          return;
       }
-      System.out.print("Manuelle Uhrzeit Feierabend (optional): ");
+      print("Manuelle Uhrzeit Feierabend (optional): ");
       String manualZapfenstreichRaw = br.readLine();
       LocalTime manualZapfenstreich = null;
       if (manualZapfenstreichRaw != null && !manualZapfenstreichRaw.isBlank()) {
-         manualZapfenstreich = LocalTime.parse(manualZapfenstreichRaw, TIME_FORMATTER);
+         manualZapfenstreich = LocalTime.parse(manualZapfenstreichRaw, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
          showLoadingBarZapfenstreich(startTime, mittagspauseDuration, manualZapfenstreich);
          return;
       }
@@ -138,7 +147,7 @@ public class LoadingBar {
       }
       verifyMinimumNumberOfArgs(args);
       verifyTimeFormat(nextArg, "Erstes Argument");
-      var startTime = LocalTime.parse(nextArg, TIME_FORMATTER);
+      var startTime = LocalTime.parse(nextArg, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
       nextArg = args[1];
       var section = DaySection.byParam(nextArg);
       verifyDaySection(section, nextArg);
@@ -161,7 +170,7 @@ public class LoadingBar {
          return;
       }
       verifyTimeFormat(nextArg, "Argument nach " + DaySection.MITTAG.getParam());
-      var manualMittagspause = LocalTime.parse(nextArg, TIME_FORMATTER);
+      var manualMittagspause = LocalTime.parse(nextArg, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
       showLoadingBarMittagspause(startTime, manualMittagspause);
    }
 
@@ -176,7 +185,7 @@ public class LoadingBar {
       int endTimeOffset = 0;
       Integer lunchDuration = null;
       if (TIME_PATTERN.matcher(nextArg).matches()) {
-         maxZapfenstreich = LocalTime.parse(nextArg, TIME_FORMATTER);
+         maxZapfenstreich = LocalTime.parse(nextArg, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
       } else if (OFFSET_PATTERN.matcher(nextArg).matches()) {
          endTimeOffset = Integer.parseInt(nextArg);
       } else {
@@ -195,12 +204,12 @@ public class LoadingBar {
       }
       nextArg = args[3];
       if (lunchDuration == null) {
-         System.out.println("Letztes Argument darf nur auf Mittagspausendauer folgen.");
+         println("Letztes Argument darf nur auf Mittagspausendauer folgen.");
          System.exit(1);
       }
       if (maxZapfenstreich == null && !OFFSET_PATTERN.matcher(nextArg).matches()) {
          verifyTimeFormat(nextArg, "Letztes Argument nach " + DaySection.ZAPFENSTREICH.getParam() + " und Mittagspausendauer");
-         maxZapfenstreich = LocalTime.parse(nextArg, TIME_FORMATTER);
+         maxZapfenstreich = LocalTime.parse(nextArg, TIME_FORMATTER).truncatedTo(ChronoUnit.MINUTES);
          showLoadingBarZapfenstreich(startTime, lunchDuration, maxZapfenstreich);
          return;
       }
@@ -214,7 +223,7 @@ public class LoadingBar {
       if (args.length >= 2) {
          return;
       }
-      System.out.println("Mindestens 2 Argumente müssen gegeben sein.");
+      println("Mindestens 2 Argumente müssen gegeben sein.");
       printHelp();
       System.exit(1);
    }
@@ -241,7 +250,7 @@ public class LoadingBar {
       } // FSFIXME fine tune message -> HH:mm, mm, -+mm
       var firstInputPart = timeInput ? "Uhrzeitformat (" + TIME_FORMAT + ")" : "Minutenanzahl (" + LUNCH_DURATION_PATTERN + ")";
       var possibleTimeInputPart = !timeInput && timeInputPossible ? " oder Uhrzeitformat (" + TIME_FORMAT + ")" : "";
-      System.out.println(errMsgPrefix + " \"" + param + "\" muss " + firstInputPart + possibleTimeInputPart + " entsprechen.");
+      println(errMsgPrefix + " \"" + param + "\" muss " + firstInputPart + possibleTimeInputPart + " entsprechen.");
       System.exit(1);
    }
 
@@ -253,13 +262,13 @@ public class LoadingBar {
       List<String> sectionDescs = Arrays.stream(DaySection.values()).map((DaySection ds) -> ds.getDescription() + " (" + ds.getParam() + ")")
           .collect(Collectors.toList());
       String sectionDescsJoined = String.join(" oder ", sectionDescs);
-      System.out.println("Argument nach Startzeit \"" + param + "\" muss Angabe für " + sectionDescsJoined + " sein.");
+      println("Argument nach Startzeit \"" + param + "\" muss Angabe für " + sectionDescsJoined + " sein.");
       System.exit(1);
    }
 
 
    private static void printHelp() {
-      System.out.println("Mögliche Argumente für LoadingBar:\n"
+      println("Mögliche Argumente für LoadingBar:\n"
           + "Normalfall Vormittag (Mittagspause <= " + LATEST_LUNCH_TIME + ")\n"
           + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + "\n"
           + "Vormittag mit expliziter Mittagspause (<= " + LATEST_LUNCH_TIME + ")\n"
@@ -373,24 +382,24 @@ public class LoadingBar {
    private static void realShowLoadingBarZapfenstreich(LocalTime startTime, long manualLunchDuration, LocalTime endTime) {
       if (manualLunchDuration > 0) {
          var totalWorkTime = LocalTime.MIDNIGHT.plusMinutes(startTime.until(endTime, ChronoUnit.MINUTES) - manualLunchDuration);
-         System.out.print("Arbeitszeit: " + TIME_FORMATTER.format(totalWorkTime) + "; ");
+         print("Arbeitszeit: " + TIME_FORMATTER.format(totalWorkTime) + "; ");
       }
       showLoadingBar(startTime, endTime);
    }
 
 
    private static void showLoadingBar(LocalTime startTime, LocalTime endTime) {
-      long initialMinutes = startTime.until(endTime, ChronoUnit.MINUTES);
+      long totalMinutes = startTime.until(endTime, ChronoUnit.MINUTES);
-      System.out.print(minutesToTimeString(initialMinutes) + " gesamt; Endzeit: " + TIME_FORMATTER.format(endTime) + "\n");
+      long passedMinutes = startTime.until(LocalTime.now().truncatedTo(ChronoUnit.MINUTES), ChronoUnit.MINUTES);
-      long passedMinutes = startTime.until(LocalTime.now(), ChronoUnit.MINUTES);
+      if (passedMinutes > totalMinutes) {
-      if (passedMinutes > initialMinutes) {
+         passedMinutes = totalMinutes;
-         passedMinutes = initialMinutes;
       } else if (passedMinutes < 0) {
-         System.out.println(fillLoadingBar(initialMinutes, 0, false));
+         var now = LocalTime.now().truncatedTo(ChronoUnit.SECONDS);
-         return;
+         println("!ACHTUNG! Startzeit \"" + startTime + ":00\" liegt in der Zukunft von jetzt an (" + now + ") gesehen.");
       }
-      while (passedMinutes < initialMinutes) {
+      println(minutesToTimeString(totalMinutes) + " gesamt; Endzeit: " + TIME_FORMATTER.format(endTime));
-         System.out.print(fillLoadingBar(initialMinutes, passedMinutes, true));
+      while (passedMinutes < totalMinutes) {
+         print(fillLoadingBar(totalMinutes, passedMinutes, true));
          try {
             var now = LocalTime.now();
             var oneMinuteLater = now.plusMinutes(1).truncatedTo(ChronoUnit.MINUTES);
@@ -402,15 +411,15 @@ public class LoadingBar {
          }
          passedMinutes++;
       }
-      System.out.println(fillLoadingBar(initialMinutes, passedMinutes, false));
+      println(fillLoadingBar(totalMinutes, passedMinutes, false));
    }
 
 
-   private static String fillLoadingBar(long initialMinutes, long passedMinutes, boolean progressive) {
+   private static String fillLoadingBar(long totalMinutes, long passedMinutes, boolean progressive) {
+      var nonNegativePassedMinutes = passedMinutes < 0 ? 0 : passedMinutes;
       BigDecimal wholePercentage = BigDecimal.valueOf(100)
-         .multiply(BigDecimal.valueOf(passedMinutes) // kind of reverse dreisatz to avoid to have e.g. 99.9999 instead of 100 %
+         .multiply( // kind of reverse dreisatz to avoid to have e.g. 99.9999 instead of 100 %
-         .divide(BigDecimal.valueOf(initialMinutes), MathContext.DECIMAL64));
+            BigDecimal.valueOf(nonNegativePassedMinutes).divide(BigDecimal.valueOf(totalMinutes), MathContext.DECIMAL64));
-      long remainingMinutes = initialMinutes - passedMinutes;
       int numberOfEquals = wholePercentage.intValue();
       var sb = new StringBuilder("[");
       for (int i = 0; i < LINE_LENGTH; i++) {
@@ -420,8 +429,9 @@ public class LoadingBar {
             sb.append("-");
          }
       }
+      long remainingMinutes = totalMinutes - nonNegativePassedMinutes;
       sb.append("] ").append(PERCENTAGE_FORMAT.format(wholePercentage)).append("% ")
-          .append(minutesToTimeString(passedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
+          .append(minutesToTimeString(nonNegativePassedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
       if (progressive) {
          sb.append("\r");
       }