From 8b881560dd8884e8e54e1e64654f79749d9ff456 Mon Sep 17 00:00:00 2001
From: Matthias Jaros <jarlucmat@mailbox.org>
Date: Mon, 13 Apr 2026 17:31:55 +0200
Subject: Renamed package from network_scanner to jscanner

---
 .../java/com/it_jaros/jscanner/ProgressBar.java    | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/main/java/com/it_jaros/jscanner/ProgressBar.java

(limited to 'src/main/java/com/it_jaros/jscanner/ProgressBar.java')

diff --git a/src/main/java/com/it_jaros/jscanner/ProgressBar.java b/src/main/java/com/it_jaros/jscanner/ProgressBar.java
new file mode 100644
index 0000000..5ea347b
--- /dev/null
+++ b/src/main/java/com/it_jaros/jscanner/ProgressBar.java
@@ -0,0 +1,118 @@
+package com.it_jaros.jscanner;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class ProgressBar {
+
+    private final ScheduledExecutorService ui = Executors.newSingleThreadScheduledExecutor();
+    private final ReentrantLock lock = new ReentrantLock();
+    private final int columnWidth = ProgressBar.getColumnWidth();
+
+    private List<Progress> hosts;
+
+    private static int getColumnWidth() {
+        try {
+            Process process = new ProcessBuilder("sh", "-c", "stty size < /dev/tty").start();
+
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream()))) {
+                String line = reader.readLine();
+                if (line != null && !line.isBlank()) {
+                    Matcher matcher = Pattern.compile("^\\d+\\s+(\\d+)").matcher(line.trim());
+                    if (matcher.matches()) {
+                        return Integer.parseInt(matcher.group(1));
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+            // does not matter why it did not work
+        }
+
+        return 120;
+    }
+
+    public void start() {
+        this.hosts = new ArrayList<>();
+        System.out.print("Scanning targets...\n\n");
+        ui.scheduleAtFixedRate(() -> {
+            lock.lock();
+            drawProgress(false);
+            lock.unlock();
+        }, 1, 200, TimeUnit.MILLISECONDS);
+    }
+
+    private void drawProgress(boolean last) {
+        // find and print finished hosts one last time
+        for (Iterator<Progress> it = hosts.iterator(); it.hasNext();) {
+            Progress p = it.next();
+            if (p.done().get() == p.total()) {
+                it.remove();
+                drawBar(p);
+            }
+        }
+
+        // the more progressed the host the more up it is
+        hosts.sort(Comparator.comparingInt((Progress p) -> p.done().get()).reversed());
+        for (Progress progress : hosts) {
+            drawBar(progress);
+        }
+
+        if (!last) {
+            // move cursor up again
+            System.out.print("\u001b[" + hosts.size() + "A");
+        }
+    }
+
+    public void submit(Progress progress) {
+        lock.lock();
+        hosts.add(progress);
+        lock.unlock();
+    }
+
+    private void drawBar(Progress progress) {
+        System.out.print("\u001b[2K\r"); // clear whole line
+        System.out.println(createBar(
+                progress.host(),
+                progress.open().get(),
+                progress.filtered().get(),
+                progress.done().get(),
+                progress.total()));
+    }
+
+    public String createBar(String label, int open, int filtered, int done, int total) {
+        int terminalWidth = columnWidth;
+        int bracketWidth = terminalWidth / 3;
+        double pct = total == 0 ? 1.0 : (done / (double) total);
+        int percent = (int) (pct * 100);
+
+        String statsLeft = String.format("open:%d filtered:%d (%d/%d)", open, filtered, done, total);
+        String statsRight = String.format("%3d%%", percent);
+        int filled = (int) (pct * bracketWidth);
+        String brackets = "[" + "#".repeat(filled) + "-".repeat(bracketWidth - filled) + "]";
+
+        int spacesBetween = terminalWidth - bracketWidth - (label + statsLeft + statsRight).length() - 5;
+        return String.format("%s%s%s %s %s", label, " ".repeat(spacesBetween),statsLeft, brackets, statsRight);
+    }
+
+    public void stop() {
+        ui.shutdown();
+        try {
+            ui.awaitTermination(10, TimeUnit.SECONDS);
+            // we need to draw one last time for the 100% to appear
+            drawProgress(true);
+        } catch (InterruptedException ignored) {
+            Thread.currentThread().interrupt();
+        }
+    }
+}
-- 
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