"""
Label printing via Brother QL-810W P-touch Editor Lite
"""
from PIL import Image, ImageDraw, ImageFont
import qrcode
from brother_ql.raster import BrotherQLRaster
from brother_ql.conversion import convert
# Fix Pillow compatibility
if not hasattr(Image, 'ANTIALIAS'):
Image.ANTIALIAS = Image.Resampling.LANCZOS
# Constants
PTLITE_PRN_PATH = r"D:\PTLITE.PRN"
TOTAL_FILE_SIZE = 112640
HEADER_PADDING = 200
LABEL_WIDTH = 696 # 62mm at 300dpi
def print_label(url: str, issue_number: str, title: str, description: str = "") -> str:
"""
Generate and print a label with QR code and text.
Args:
url: URL to encode in QR code
issue_number: Issue/PR number (e.g., '#1234')
title: Issue/PR title
description: Optional brief description
Returns:
Success message or error
"""
# Generate QR code
qr = qrcode.QRCode(version=1, box_size=8, border=1)
qr.add_data(url)
qr.make(fit=True)
qr_img = qr.make_image(fill_color='black', back_color='white').convert('RGB')
qr_size = qr_img.size[0]
# Create label image
label_height = max(qr_size + 10, 150)
label = Image.new('RGB', (LABEL_WIDTH, label_height), 'white')
draw = ImageDraw.Draw(label)
# Paste QR on left
label.paste(qr_img, (5, 5))
# Load fonts
try:
font_big = ImageFont.truetype('arial.ttf', 28)
font_small = ImageFont.truetype('arial.ttf', 20)
except OSError:
font_big = ImageFont.load_default()
font_small = font_big
# Add text on right
text_x = qr_size + 20
draw.text((text_x, 10), issue_number, fill='black', font=font_big)
draw.text((text_x, 45), title[:30], fill='black', font=font_small) # Truncate long titles
if description:
draw.text((text_x, 72), description[:35], fill='black', font=font_small)
# Save temp image
temp_path = "temp_label.png"
label.save(temp_path)
# Convert to Brother QL raster format
qlr = BrotherQLRaster('QL-810W')
raster = convert(
qlr=qlr,
images=[temp_path],
label='62',
rotate='0',
threshold=70,
cut=True
)
# Create padded output (112640 bytes with 200-byte header)
output = bytearray(TOTAL_FILE_SIZE)
output[HEADER_PADDING:HEADER_PADDING + len(raster)] = raster
# Write to PTLITE.PRN
with open(PTLITE_PRN_PATH, 'wb') as f:
f.write(output)
return f"Label printed: {issue_number} - {title}"
