base: Simplify receiver info retrieval

- Remove comments with unused receivers
- Simplify receiver hardcoded info

lib/logitech_receiver/base.py

@@ -103,14 +103,12 @@ def other_device_check(bus_id: int, vendor_id: int, product_id: int):
             return _bluetooth_device(product_id)
 
 
-def product_information(usb_id: int | str) -> dict:
-    if isinstance(usb_id, str):
-        usb_id = int(usb_id, 16)
-
-    for r in base_usb.ALL:
-        if usb_id == r.get("product_id"):
-            return r
-    return {}
+def product_information(usb_id: int) -> dict[str, Any]:
+    """Returns hardcoded information from USB receiver."""
+    for receiver in base_usb.KNOWN_RECEIVER:
+        if usb_id == receiver.get("product_id"):
+            return receiver
+    raise ValueError(f"Unknown receiver type: 0x{usb_id:02X}")
 
 
 _SHORT_MESSAGE_SIZE = 7
@@ -147,9 +145,12 @@ def match(record, bus_id, vendor_id, product_id):
     )
 
 
-def filter_receivers(bus_id, vendor_id, product_id, hidpp_short=False, hidpp_long=False):
-    """Check that this product is a Logitech receiver and if so return the receiver record for further checking"""
-    for record in base_usb.ALL:  # known receivers
+def filter_receivers(bus_id: int, vendor_id: int, product_id: int, hidpp_short=False, hidpp_long=False):
+    """Check that this product is a Logitech receiver
+
+    If so return the receiver record for further checking.
+    """
+    for record in base_usb.KNOWN_RECEIVER:  # known receivers
         if match(record, bus_id, vendor_id, product_id):
             return record
     if vendor_id == LOGITECH_VENDOR_ID and 0xC500 <= product_id <= 0xC5FF:  # unknown receiver

lib/logitech_receiver/base_usb.py

@@ -170,7 +170,6 @@ NANO_RECEIVER_C531 = _nano_receiver(0xC531)
 NANO_RECEIVER_C534 = _nano_receiver_max2(0xC534)
 NANO_RECEIVER_C535 = _nano_receiver(0xC535)  # branded as Dell
 NANO_RECEIVER_C537 = _nano_receiver(0xC537)
-# NANO_RECEIVER_C542 = _nano_receiver(0xc542) # does not use HID++
 NANO_RECEIVER_6042 = _lenovo_receiver(0x6042)
 
 # Lightspeed receivers (usually sold with gaming devices)
@@ -183,11 +182,9 @@ LIGHTSPEED_RECEIVER_C545 = _lightspeed_receiver(0xC545)
 LIGHTSPEED_RECEIVER_C547 = _lightspeed_receiver(0xC547)
 
 # EX100 old style receiver pre-unifying protocol
-# EX100_27MHZ_RECEIVER_C50C = _ex100_receiver(0xc50C)  # in hid/hid-ids.h
 EX100_27MHZ_RECEIVER_C517 = _ex100_receiver(0xC517)
-# EX100_27MHZ_RECEIVER_C51B = _ex100_receiver(0xc51B)  # in hid/hid-ids.h
 
-ALL = (
+KNOWN_RECEIVER = (
     BOLT_RECEIVER_C548,
     UNIFYING_RECEIVER_C52B,
     UNIFYING_RECEIVER_C532,
@@ -203,7 +200,6 @@ ALL = (
     NANO_RECEIVER_C534,
     NANO_RECEIVER_C535,
     NANO_RECEIVER_C537,
-    #    NANO_RECEIVER_C542,  # does not use HID++
     NANO_RECEIVER_6042,
     LIGHTSPEED_RECEIVER_C539,
     LIGHTSPEED_RECEIVER_C53A,

lib/logitech_receiver/receiver.py

@@ -513,9 +513,12 @@ class ReceiverFactory:
         try:
             handle = base.open_path(device_info.path)
             if handle:
-                product_info = base.product_information(device_info.product_id)
-                if not product_info:
-                    logger.warning("Unknown receiver type: %s", device_info.product_id)
+                usb_id = device_info.product_id
+                if isinstance(usb_id, str):
+                    usb_id = int(usb_id, 16)
+                try:
+                    product_info = base.product_information(usb_id)
+                except ValueError:
                     product_info = {}
                 kind = product_info.get("receiver_kind", "unknown")
                 rclass = receiver_class_mapping.get(kind, Receiver)

tests/logitech_receiver/test_base.py

@@ -6,16 +6,19 @@ from logitech_receiver import base
 @pytest.mark.parametrize(
     "usb_id, expected_name, expected_receiver_kind",
     [
-        ("0xC548", "Bolt Receiver", "bolt"),
-        ("0xC52B", "Unifying Receiver", "unifying"),
-        ("0xC531", "Nano Receiver", "nano"),
-        ("0xC53F", "Lightspeed Receiver", None),
-        ("0xC517", "EX100 Receiver 27 Mhz", "27Mhz"),
+        (0xC548, "Bolt Receiver", "bolt"),
+        (0xC52B, "Unifying Receiver", "unifying"),
+        (0xC531, "Nano Receiver", "nano"),
+        (0xC53F, "Lightspeed Receiver", None),
+        (0xC517, "EX100 Receiver 27 Mhz", "27Mhz"),
     ],
 )
 def test_product_information(usb_id, expected_name, expected_receiver_kind):
     res = base.product_information(usb_id)
 
     assert res["name"] == expected_name
+    assert isinstance(res["vendor_id"], int)
+    assert isinstance(res["product_id"], int)
+
     if expected_receiver_kind:
         assert res["receiver_kind"] == expected_receiver_kind