Coverage for  / usr / local / lib / python3.14 / site-packages / twinpad_backend / queries.py: 98%

1from typing import get_args, ClassVar 

2import datetime 

3import json 

4import re 

5 

6from pydantic import BaseModel, create_model 

7from fastapi import HTTPException 

8 

9from twinpad_backend.models import Signal, ForcedSignal, Event, EventRule, DeviceState, Command, PublicGraphTheme 

10 

11REST_API_OPERATORS_TO_MONGO = {op: f"${op}" for op in ("gt", "gte", "lt", "lte", "eq", "in", "not")} 

12 

13 

14def api_operators_to_mongo(operator, value): 

15 if operator in REST_API_OPERATORS_TO_MONGO: 

16 return REST_API_OPERATORS_TO_MONGO[operator], value 

17 

18 if operator == "startswith": 

19 return "$regex", f"^{value}" 

20 

21 if operator == "contains": 

22 return "$regex", f".*{value}.*" 

23 

24 raise ValueError("Operator unsupported") 

25 

26 

27def get_main_annotation(annotation): 

28 for arg in get_args(annotation): 

29 if arg is not None: 

30 if arg is bool: 

31 return strtobool 

32 return arg 

33 if annotation is bool: 

34 return strtobool 

35 return annotation 

36 

37 

38def strtobool(value: str): 

39 """Convert a string representation of truth to True or False. 

40 True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values 

41 are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if 

42 'val' is anything else. 

43 

44 It was found here: https://stackoverflow.com/a/18472142 and copied from distutils, a now deprecated stdlib 

45 """ 

46 value = value.strip().lower() 

47 if value in {"y", "yes", "t", "true", "on", "1"}: 

48 return True 

49 if value in {"n", "no", "f", "false", "off", "0"}: 

50 return False 

51 raise HTTPException(status_code=400, detail=f"Invalid truth value: {value}") 

52 

53 

54class Query(BaseModel): 

55 limit: int | None = 20 

56 offset: int | None = 0 

57 sort_by: str | None = "id" 

58 

59 def mongodb_filter(self): 

60 filters_by_field = {} 

61 for field_name in self._base_class.model_fields.keys(): 

62 value = getattr(self, field_name) 

63 if value is not None: 

64 filters_by_field.setdefault(field_name, {}) 

65 for segment in value.split("|"): 

66 if ":" in segment: 

67 operator, value = segment.split(":", maxsplit=1) 

68 else: 

69 value = segment 

70 operator = "eq" 

71 

72 annotation = get_main_annotation(self._base_class.model_fields[field_name].annotation) 

73 if operator in set(["in"]): # operators that accepts list argument 

74 # Parse list 

75 value = [annotation(v) for v in value.lstrip("[").rstrip("]").split(",")] 

76 elif re.match(r"\{.*\}", value): 

77 value = json.loads(value) 

78 else: 

79 value = annotation(value) 

80 if field_name == "timestamp": 

81 value = datetime.datetime.fromtimestamp(value) 

82 

83 try: 

84 mongo_operator, mongo_value = api_operators_to_mongo(operator=operator, value=value) 

85 except ValueError as e: 

86 raise HTTPException( 

87 status_code=400, 

88 detail=f"Query Operator unsupported, got {operator}", 

89 ) from e 

90 

91 # when it's a regex add to its content instead of replacing it 

92 if mongo_operator == "$regex": 

93 if filters_by_field[field_name].setdefault(mongo_operator, mongo_value) != mongo_value: 

94 filters_by_field[field_name][mongo_operator] += mongo_value 

95 else: 

96 filters_by_field[field_name][mongo_operator] = mongo_value 

97 

98 filters_list = [] 

99 for field_name, field_filters in filters_by_field.items(): 

100 filters_list.append({field_name: field_filters}) 

101 if not filters_list: 

102 return {} 

103 if len(filters_list) == 1: 

104 return filters_list[0] 

105 return {"$and": filters_list} 

106 

107 

108def create_query_model(model): 

109 fields = {} 

110 

111 for field_name in model.model_fields.keys(): 

112 fields[field_name] = (str | None, None) 

113 

114 query_name = model.__name__ + "Query" 

115 return create_model(query_name, **fields) 

116 

117 

118class SignalQuery(create_query_model(Signal), Query): 

119 _base_class: ClassVar[type] = Signal 

120 sort_by: str | None = "signal_id" 

121 post_processing: bool | str | None = None 

122 broadcastable: str | None = "true" 

123 

124 

125class ForcedSignalQuery(create_query_model(ForcedSignal), Query): 

126 _base_class: ClassVar[type] = ForcedSignal 

127 sort_by: str | None = "signal_id" 

128 

129 

130class DeviceStatesQuery(create_query_model(DeviceState), Query): 

131 _base_class: ClassVar[type] = DeviceState 

132 sort_by: str | None = "timestamp:-1" 

133 modified_properties: str | None 

134 

135 

136class EventQuery(create_query_model(Event), Query): 

137 _base_class: ClassVar[type] = Event 

138 sort_by: str | None = "timestamp" 

139 

140 

141class EventRuleQuery(create_query_model(EventRule), Query): 

142 _base_class: ClassVar[type] = EventRule 

143 sort_by: str | None = "name" 

144 

145 

146class CommandQuery(create_query_model(Command), Query): 

147 _base_class: ClassVar[type] = Command 

148 sort_by: str | None = "timestamp:-1" 

149 

150 

151class GraphThemeQuery(create_query_model(PublicGraphTheme), Query): 

152 _base_class: ClassVar[type] = PublicGraphTheme