Add new functions for discovery and parsing of printers, WIP

src/printer.py

@@ -1,5 +1,6 @@
 # Importing the module to manage the connection to the printer.
 import escpos.printer as escp
+import brother-ql-inventree
 from time import sleep, gmtime, strftime
 import os.path
 from PIL import Image, ImageEnhance, ImageOps
@@ -286,3 +287,93 @@ def process_image(self, path):
         original_img.save(jpeg_path, format="JPEG", quality=95, optimize=True)
 
     return jpeg_path
+
+def discover_printers():
+    """
+    We try to find all the connected printers ( 0 or n ) to this system.
+
+    For every type of supported printer, we try to autodiscover them.
+
+    http://www.linux-usb.org/usb.ids A list of USB vendor IDs
+
+    04b8  Seiko Epson Corp.
+    04f9  Brother Industries, Ltd
+    """
+
+def find_and_parse_borther_ql_printer():
+
+
+    ## We might be able to no use this because there is a `discover` command in https://github.com/pklaus/brother_ql#usage
+
+    ## Code stolen from https://framagit.org/stickoeur/diagnostickoeur/-/blob/no-masters/printit.py?ref_type=heads
+
+    """Find and parse Brother QL printer information."""
+
+    model_manager = ModelsManager()
+
+    # Debug print to show we're searching
+    # print("Searching for Brother QL printer...")
+
+    for backend_name in ["pyusb", "linux_kernel"]:
+        try:
+            #print(f"Trying backend: {backend_name}")
+            backend = backend_factory(backend_name)
+            available_devices = backend["list_available_devices"]()
+            #print(f"Found {len(available_devices)} devices with {backend_name} backend")
+
+            for printer in available_devices:
+                #print(f"Found device: {printer}")
+                identifier = printer["identifier"]
+                parts = identifier.split("/")
+
+                if len(parts) < 4:
+                    #print(f"Skipping device with invalid identifier format: {identifier}")
+                    continue
+
+                protocol = parts[0]
+                device_info = parts[2]
+                serial_number = parts[3]
+
+                try:
+                    vendor_id, product_id = device_info.split(":")
+                except ValueError:
+                    #print(f"Invalid device info format: {device_info}")
+                    continue
+
+                # Default model
+                model = "QL-570"
+
+                # Try to match product ID to determine actual model
+                try:
+                    product_id_int = int(product_id, 16)
+                    for m in model_manager.iter_elements():
+                        if m.product_id == product_id_int:
+                            model = m.identifier
+                            break
+                    #print(f"Matched printer model: {model}")
+                except ValueError:
+                    #print(f"Invalid product ID format: {product_id}")
+                    continue
+
+                printer_info = {
+                    "identifier": identifier,
+                    "backend": backend_name,
+                    "model": model,
+                    "protocol": protocol,
+                    "vendor_id": vendor_id,
+                    "product_id": product_id,
+                    "serial_number": serial_number,
+                }
+                #print(f"Found printer: {printer_info}")
+                return printer_info
+
+        except Exception as e:
+            #print(f"Error with backend {backend_name}: {str(e)}")
+            continue
+
+    print("No Brother QL printer found")
+    return None
+
+
+def fint_and_parse_epson_printer():
+    pass