Coverage for src/bluetooth_sig/gatt/characteristics/blood_pressure_feature.py: 100%

1"""Blood Pressure Feature characteristic implementation.""" 

2 

3from __future__ import annotations 

4 

5from enum import IntFlag 

6 

7import msgspec 

8 

9from ...types.gatt_enums import ValueType 

10from ..context import CharacteristicContext 

11from .base import BaseCharacteristic 

12from .utils import DataParser 

13 

14 

15class BloodPressureFeatures(IntFlag): 

16 """Blood Pressure Feature flags as per Bluetooth SIG specification.""" 

17 

18 BODY_MOVEMENT_DETECTION = 0x01 

19 CUFF_FIT_DETECTION = 0x02 

20 IRREGULAR_PULSE_DETECTION = 0x04 

21 PULSE_RATE_RANGE_DETECTION = 0x08 

22 MEASUREMENT_POSITION_DETECTION = 0x10 

23 MULTIPLE_BOND_SUPPORT = 0x20 

24 

25 

26class BloodPressureFeatureData(msgspec.Struct, frozen=True, kw_only=True): # pylint: disable=too-few-public-methods 

27 """Parsed data from Blood Pressure Feature characteristic.""" 

28 

29 features_bitmap: int 

30 body_movement_detection_support: bool 

31 cuff_fit_detection_support: bool 

32 irregular_pulse_detection_support: bool 

33 pulse_rate_range_detection_support: bool 

34 measurement_position_detection_support: bool 

35 multiple_bond_support: bool 

36 

37 

38class BloodPressureFeatureCharacteristic(BaseCharacteristic): 

39 """Blood Pressure Feature characteristic (0x2A49). 

40 

41 Used to expose the supported features of a blood pressure monitoring 

42 device. Indicates which optional measurements and capabilities are 

43 available. 

44 """ 

45 

46 _manual_value_type: ValueType | str | None = ValueType.DICT # Override since decode_value returns dataclass 

47 

48 def decode_value(self, data: bytearray, ctx: CharacteristicContext | None = None) -> BloodPressureFeatureData: 

49 """Parse blood pressure feature data according to Bluetooth specification. 

50 

51 Format: Features(2) - 16-bit bitmap indicating supported features. 

52 

53 Args: 

54 data: Raw bytearray from BLE characteristic. 

55 ctx: Optional CharacteristicContext providing surrounding context (may be None). 

56 

57 Returns: 

58 BloodPressureFeatureData containing parsed feature bitmap and capabilities. 

59 

60 """ 

61 if len(data) < 2: 

62 raise ValueError("Blood Pressure Feature data must be at least 2 bytes") 

63 

64 features_bitmap = DataParser.parse_int16(data, 0, signed=False) 

65 

66 body_movement_detection = bool(features_bitmap & BloodPressureFeatures.BODY_MOVEMENT_DETECTION) 

67 cuff_fit_detection = bool(features_bitmap & BloodPressureFeatures.CUFF_FIT_DETECTION) 

68 irregular_pulse_detection = bool(features_bitmap & BloodPressureFeatures.IRREGULAR_PULSE_DETECTION) 

69 pulse_rate_range_detection = bool(features_bitmap & BloodPressureFeatures.PULSE_RATE_RANGE_DETECTION) 

70 measurement_position_detection = bool(features_bitmap & BloodPressureFeatures.MEASUREMENT_POSITION_DETECTION) 

71 multiple_bond_support = bool(features_bitmap & BloodPressureFeatures.MULTIPLE_BOND_SUPPORT) 

72 

73 return BloodPressureFeatureData( 

74 features_bitmap=features_bitmap, 

75 body_movement_detection_support=body_movement_detection, 

76 cuff_fit_detection_support=cuff_fit_detection, 

77 irregular_pulse_detection_support=irregular_pulse_detection, 

78 pulse_rate_range_detection_support=pulse_rate_range_detection, 

79 measurement_position_detection_support=measurement_position_detection, 

80 multiple_bond_support=multiple_bond_support, 

81 ) 

82 

83 def encode_value(self, data: BloodPressureFeatureData) -> bytearray: 

84 """Encode BloodPressureFeatureData back to bytes. 

85 

86 Args: 

87 data: BloodPressureFeatureData instance to encode 

88 

89 Returns: 

90 Encoded bytes representing the blood pressure features 

91 

92 """ 

93 return DataParser.encode_int16(data.features_bitmap, signed=False)