From 56973afa2ec59de1c69c4559dcb0f70355f1b065 Mon Sep 17 00:00:00 2001
From: Werner Glanzer <w.glanzer@adito.de>
Date: Mon, 17 Jul 2023 15:53:22 +0200
Subject: [PATCH] feat: limit user feedback text to 2000 characters

---
 .../impl/actions/SendBugReportAction.java     | 46 ++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/main/java/de/adito/aditoweb/nbm/metrics/impl/actions/SendBugReportAction.java b/src/main/java/de/adito/aditoweb/nbm/metrics/impl/actions/SendBugReportAction.java
index 19e401d..60c35e8 100644
--- a/src/main/java/de/adito/aditoweb/nbm/metrics/impl/actions/SendBugReportAction.java
+++ b/src/main/java/de/adito/aditoweb/nbm/metrics/impl/actions/SendBugReportAction.java
@@ -20,7 +20,7 @@
 import javax.swing.*;
 import javax.swing.border.*;
 import javax.swing.event.*;
-import javax.swing.text.BadLocationException;
+import javax.swing.text.*;
 import java.awt.*;
 import java.awt.datatransfer.StringSelection;
 import java.awt.event.*;
@@ -51,6 +51,7 @@ public class SendBugReportAction extends AbstractAction
                                                                                  .setNameFormat("tBugReport-%d")
                                                                                  .build());
   private static final String DLG_SEND_DATA_OPTION = NbBundle.getMessage(SendBugReportAction.class, "NAME_SendBugReportDialog_SendData");
+  private static final int FEEDBACK_TEXT_LIMIT = 2000;
   private final TemporaryFileProvider temporaryFileProvider = new TemporaryFileProvider();
 
   public SendBugReportAction()
@@ -235,6 +236,7 @@ private void initComponents()
 
       // Lower comment section for user input
       commentArea = new JTextArea();
+      ((AbstractDocument) commentArea.getDocument()).setDocumentFilter(new DocumentSizeFilter(FEEDBACK_TEXT_LIMIT));
       tlu.add(0, 4, new JScrollPane(commentArea));
 
       // Contact information
@@ -364,4 +366,46 @@ public void changedUpdate(DocumentEvent e)
     }
   }
 
+  /**
+   * Filter, that only allows a specific amount of text.
+   * Exceeding text will be truncated.
+   */
+  @RequiredArgsConstructor
+  private static class DocumentSizeFilter extends DocumentFilter
+  {
+    /**
+     * Character limit
+     */
+    private final int maxCharacters;
+
+    @Override
+    public void insertString(FilterBypass fb, int offset, String str, AttributeSet attr) throws BadLocationException
+    {
+      if ((fb.getDocument().getLength() + str.length()) <= maxCharacters)
+        super.insertString(fb, offset, str, attr);
+      else
+      {
+        // Handle the case where the inserted text would exceed the character limit.
+        int charactersToInsert = maxCharacters - fb.getDocument().getLength();
+        if (charactersToInsert > 0)
+          super.insertString(fb, offset, str.substring(0, charactersToInsert), attr);
+      }
+    }
+
+    @Override
+    public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException
+    {
+      if ((fb.getDocument().getLength() + text.length() - length) <= maxCharacters)
+        super.replace(fb, offset, length, text, attrs);
+      else
+      {
+        // Handle the case where the replacement text would exceed the character limit.
+        int charactersToInsert = maxCharacters - fb.getDocument().getLength() + length;
+        if (charactersToInsert > 0)
+          super.replace(fb, offset, length, text.substring(0, charactersToInsert), attrs);
+      }
+    }
+
+  }
+
 }