From 3aa204d4562f5ebc5ac0ec199a60a60c5d0e7065 Mon Sep 17 00:00:00 2001
From: Arnav Alok <arnavaalok@gmail.com>
Date: Sat, 26 Sep 2026 13:22:22 +0530
Subject: [PATCH] Add QR code PNG generator

---
 100lines Generator/Qr/README.md        | 19 ++++++
 100lines Generator/Qr/qr_generator.py  | 85 +++++++-------------------
 100lines Generator/Qr/requirements.txt |  1 +
 3 files changed, 42 insertions(+), 63 deletions(-)
 create mode 100644 100lines Generator/Qr/README.md
 create mode 100644 100lines Generator/Qr/requirements.txt

diff --git a/100lines Generator/Qr/README.md b/100lines Generator/Qr/README.md
new file mode 100644
index 00000000..f19a3de8
--- /dev/null
+++ b/100lines Generator/Qr/README.md	
@@ -0,0 +1,19 @@
+# QR Code Generator
+
+Generate a QR code from any text or URL and save it as a PNG image in the
+user's `Downloads` folder.
+
+## Setup
+
+```bash
+python3 -m pip install -r requirements.txt
+```
+
+## Usage
+
+```bash
+python3 qr_generator.py
+```
+
+Enter the data when prompted. The generated `qr_code_*.png` file can be opened
+or shared like any other photo.
diff --git a/100lines Generator/Qr/qr_generator.py b/100lines Generator/Qr/qr_generator.py
index 8e9ef423..f9c96cc3 100644
--- a/100lines Generator/Qr/qr_generator.py	
+++ b/100lines Generator/Qr/qr_generator.py	
@@ -1,55 +1,36 @@
 #!/usr/bin/env python3
-"""
-QR Code Generator Utility
+"""Generate a QR code from user input and save it as a PNG image."""
 
-Generates a QR code from user-defined data and saves it as a PNG file
-in the user's Downloads folder.
-
-Dependencies:
-    pip install qrcode[pil]
-
-Usage:
-    python qr_generator.py
-"""
-
-import os
-import sys
 from datetime import datetime
+from pathlib import Path
+
 try:
-    import qrcode:
+    import qrcode
 except ImportError:
     print("Module 'qrcode' not found. Please install it with: pip install qrcode[pil]")
-    sys.exit(1)
+    raise SystemExit(1)
 
 
 def get_downloads_folder():
-    """Return the path to the user's Downloads folder in a cross-platform way."""
-    if sys.platform.startswith('win'):
-        import ctypes.wintypes
+    """Return the user's Downloads folder, creating it when necessary."""
+    downloads = Path.home() / "Downloads"
+    downloads.mkdir(parents=True, exist_ok=True)
+    return downloads
 
-        # SHGetKnownFolderPath constants
-        CSIDL_PERSONAL = 0x0005  # My Documents
-        SHGFP_TYPE_CURRENT = 0
-        try:
-            from ctypes import windll, create_unicode_buffer
 
-            buf = create_unicode_buffer(260)
-            # 0x000c is CSIDL for Downloads folder (CSIDL_DOWNLOADS)
-            # Windows Vista and later supports KnownFolder API better but fallback here
-            # For simplicity, try the environment variable fallback below instead
+def generate_qr(data):
+    """Create a PNG QR code and return its path."""
+    if not data.strip():
+        raise ValueError("Data cannot be empty.")
 
-            # If this method is unreliable, fallback to env var:
-            downloads = os.path.join(os.environ['USERPROFILE'], 'Downloads')
-            if os.path.exists(downloads):
-                return downloads
-        except Exception:
-            pass
-        # fallback
-        return os.path.join(os.path.expanduser('~'), 'Downloads')
-
-    else:
-        # macOS and Linux generally have ~/Downloads
-        return os.path.join(os.path.expanduser('~'), 'Downloads')
+    filename = f"qr_code_{datetime.now():%Y%m%d_%H%M%S}.png"
+    filepath = get_downloads_folder() / filename
+    qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_L,
+                       box_size=10, border=4)
+    qr.add_data(data)
+    qr.make(fit=True)
+    qr.make_image(fill_color="black", back_color="white").save(filepath, format="PNG")
+    return filepath
 
 
 def main():
@@ -60,29 +41,7 @@ def main():
         print("No data entered. Exiting.")
         return
 
-    downloads_path = get_downloads_folder()
-    if not os.path.exists(downloads_path):
-        print(f"Downloads folder not found at expected location: {downloads_path}")
-        print("Saving in current directory instead.")
-        downloads_path = os.getcwd()
-
-    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
-    filename = f"qr_code_{timestamp}.png"
-    filepath = os.path.join(downloads_path, filename)
-
-    qr = qrcode.QRCode(
-        version=1,
-        error_correction=qrcode.constants.ERROR_CORRECT_L,
-        box_size=10,
-        border=4,
-    )
-    qr.add_data(data)
-    qr.make(fit=True)
-
-    img = qr.make_image(fill_color="black", back_color="white")
-    img.save(filepath)
-
-    print(f"QR code saved to: {filepath}")
+    print(f"QR code saved to: {generate_qr(data)}")
 
 
 if __name__ == "__main__":
diff --git a/100lines Generator/Qr/requirements.txt b/100lines Generator/Qr/requirements.txt
new file mode 100644
index 00000000..e4101d57
--- /dev/null
+++ b/100lines Generator/Qr/requirements.txt	
@@ -0,0 +1 @@
+qrcode[pil]
\ No newline at end of file