app.py

@@ -14,8 +14,6 @@ import time
 
 app = Flask(__name__)
 
-printer_busy = False
-
 # Set up logging
 log_file = 'log.txt'
 
@@ -33,15 +31,10 @@ app.logger.setLevel(logging.DEBUG)
 
 # Create a queue to hold the files for processing
 file_queue = queue.Queue()
-image_queue = queue.Queue()
-
-lock = threading.Lock()
 
 # Directory to save uploaded files (you can modify this path)
 UPLOAD_FOLDER = './uploads'
-IMAGE_FOLDER = './images'
 os.makedirs(UPLOAD_FOLDER, exist_ok=True)
-os.makedirs(IMAGE_FOLDER, exist_ok=True)
 
 # Printer configuration
 printer_model = "QL-1100"
@@ -49,20 +42,26 @@ backend = 'pyusb'
 printer = 'usb://0x04f9:0x20a7'
 
 # Convert PDF to image
-def convert_pdf_to_images(pdf_path):
+def convert_pdf_to_image(pdf_path):
     """Converts a PDF to a PIL Image"""
     try:
+        # Convert PDF to image (get the first page)
         images = pdf2image.convert_from_path(pdf_path)
         if images:
-            return images
+            return images[0]  # We will only print the first page for now
         return None
     except Exception as e:
         app.logger.error(f"Error converting PDF: {str(e)}")
         return None
 
 # Function to print address labels
-def print_address_label(image, pdf_path):
+def print_address_label(pdf_path):
     try:
+        # Convert PDF to image
+        image = convert_pdf_to_image(pdf_path)
+        if not image:
+            raise Exception("Failed to create label images")
+        
         if 'address' in pdf_path.lower():
             target_width = 1660
             target_height = 1164
@@ -81,7 +80,7 @@ def print_address_label(image, pdf_path):
         app.logger.info("Converting image to printer instructions...")
         instructions = convert(
             qlr=qlr,
-            images=[image],
+            images=[image],  # Pass as a list with the single image
             label='102x152',
             threshold=70.0,
             dither=False,
@@ -105,67 +104,22 @@ def print_address_label(image, pdf_path):
     except Exception as e:
         app.logger.error(f"Error during printing: {str(e)}")
 
-def save_images(images, pdf_path):
-    uuid = str(int(time.time()))
-    for i, image in enumerate(images):
-        if 'address' in pdf_path.lower():
-            image.save(os.path.join(IMAGE_FOLDER, f"address_label_{uuid}_{i}.png"), "PNG")
-        elif 'packing' in pdf_path.lower():
-            image.save(os.path.join(IMAGE_FOLDER, f"shipping_label_{uuid}_{i}.png"), "PNG")
-        else:
-            image.save(os.path.join(IMAGE_FOLDER, f"unknown_{uuid}_{i}.png"), "PNG")
-        image_queue.put((image, pdf_path))
-
 # Worker thread that processes files from the queue
-def file_worker():
+def process_queue():
-    global printer_busy
     while True:
+        # Wait until a file is available in the queue
         file_path = file_queue.get()
         if file_path is None:  # Shutdown signal
             break
-        while printer_busy:
+        # Process the file (convert and print)
-            time.sleep(1)
         app.logger.info(f"Processing file: {file_path}")
-        images = convert_pdf_to_images(file_path)
+        print_address_label(file_path)
-        if images:
+        # Signal that the task is done
-            save_images(images, file_path)
-        else:
-            app.logger.error(f"Failed to convert PDF to images: {file_path}")
         file_queue.task_done()
 
-# Printer worker
+# Start the worker thread
-def printer_worker():
+thread = threading.Thread(target=process_queue, daemon=True)
-    global printer_busy
+thread.start()
-    while True:
-        image, path = image_queue.get()
-        if image is None:
-            if printer_busy:
-                time.sleep(10)
-                printer_busy = False
-            break
-        with lock:
-            printer_busy = True
-            print_address_label(image, path)
-        image_queue.task_done()
-
-# Variable to track the printer worker thread
-printer_worker_thread = None
-
-# Ensure only one printer worker is created
-def start_printer_worker():
-    global printer_worker_thread
-    if printer_worker_thread is None or not printer_worker_thread.is_alive():
-        app.logger.info("Starting printer worker thread.")
-        printer_worker_thread = threading.Thread(target=printer_worker, daemon=True)
-        printer_worker_thread.start()
-    else:
-        app.logger.info("Printer worker thread already running.")
-
-# Start the file worker thread
-threading.Thread(target=file_worker, daemon=True).start()
-
-# Start the printer worker only once
-start_printer_worker()
 
 @app.route('/upload', methods=['POST'])
 def upload_file():