1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
from __future__ import annotations
import random
import secrets
import string
import uuid
from abc import abstractmethod, ABCMeta
from collections.abc import Callable
from typing import Any, ClassVar, TypeVar, Generic
from ._error import CruException
def _str_case_in(s: str, case: bool, str_list: list[str]) -> bool:
if case:
return s in str_list
else:
return s.lower() in [s.lower() for s in str_list]
_T = TypeVar("_T")
class CruValueTypeError(CruException):
def __init__(
self,
message: str,
value: Any,
value_type: ValueType | None,
*args,
**kwargs,
):
super().__init__(
message,
*args,
**kwargs,
)
self._value = value
self._value_type = value_type
@property
def value(self) -> Any:
return self._value
@property
def value_type(self) -> ValueType | None:
return self._value_type
class ValueType(Generic[_T], metaclass=ABCMeta):
def __init__(self, name: str, _type: type[_T]) -> None:
self._name = name
self._type = _type
@property
def name(self) -> str:
return self._name
@property
def type(self) -> type[_T]:
return self._type
def check_value_type(self, value: Any) -> None:
if not isinstance(value, self.type):
raise CruValueTypeError("Type of value is wrong.", value, self)
def _do_check_value(self, value: Any) -> _T:
return value
def check_value(self, value: Any) -> _T:
self.check_value_type(value)
return self._do_check_value(value)
@abstractmethod
def _do_check_str_format(self, s: str) -> None:
raise NotImplementedError()
def check_str_format(self, s: str) -> None:
if not isinstance(s, str):
raise CruValueTypeError("Try to check format on a non-str.", s, self)
self._do_check_str_format(s)
@abstractmethod
def _do_convert_value_to_str(self, value: _T) -> str:
raise NotImplementedError()
def convert_value_to_str(self, value: _T) -> str:
self.check_value(value)
return self._do_convert_value_to_str(value)
@abstractmethod
def _do_convert_str_to_value(self, s: str) -> _T:
raise NotImplementedError()
def convert_str_to_value(self, s: str) -> _T:
self.check_str_format(s)
return self._do_convert_str_to_value(s)
def check_value_or_try_convert_from_str(self, value_or_str: Any) -> _T:
try:
return self.check_value(value_or_str)
except CruValueTypeError:
if isinstance(value_or_str, str):
return self.convert_str_to_value(value_or_str)
else:
raise
def create_default_value(self) -> _T:
return self.type()
class TextValueType(ValueType[str]):
def __init__(self) -> None:
super().__init__("text", str)
def _do_check_str_format(self, _s):
return
def _do_convert_value_to_str(self, value):
return value
def _do_convert_str_to_value(self, s):
return s
class IntegerValueType(ValueType[int]):
def __init__(self) -> None:
super().__init__("integer", int)
def _do_check_str_format(self, s):
try:
int(s)
except ValueError as e:
raise CruValueTypeError("Invalid integer format.", s, self) from e
def _do_convert_value_to_str(self, value):
return str(value)
def _do_convert_str_to_value(self, s):
return int(s)
class FloatValueType(ValueType[float]):
def __init__(self) -> None:
super().__init__("float", float)
def _do_check_str_format(self, s):
try:
float(s)
except ValueError as e:
raise CruValueTypeError("Invalid float format.", s, self) from e
def _do_convert_value_to_str(self, value):
return str(value)
def _do_convert_str_to_value(self, s):
return float(s)
class BooleanValueType(ValueType[bool]):
DEFAULT_TRUE_LIST: ClassVar[list[str]] = ["true", "yes", "y", "on", "1"]
DEFAULT_FALSE_LIST: ClassVar[list[str]] = ["false", "no", "n", "off", "0"]
def __init__(
self,
*,
case_sensitive=False,
true_list: None | list[str] = None,
false_list: None | list[str] = None,
) -> None:
super().__init__("boolean", bool)
self._case_sensitive = case_sensitive
self._valid_true_strs: list[str] = (
true_list or BooleanValueType.DEFAULT_TRUE_LIST
)
self._valid_false_strs: list[str] = (
false_list or BooleanValueType.DEFAULT_FALSE_LIST
)
@property
def case_sensitive(self) -> bool:
return self._case_sensitive
@property
def valid_true_strs(self) -> list[str]:
return self._valid_true_strs
@property
def valid_false_strs(self) -> list[str]:
return self._valid_false_strs
@property
def valid_boolean_strs(self) -> list[str]:
return self._valid_true_strs + self._valid_false_strs
def _do_check_str_format(self, s):
if not _str_case_in(s, self.case_sensitive, self.valid_boolean_strs):
raise CruValueTypeError("Invalid boolean format.", s, self)
def _do_convert_value_to_str(self, value):
return self._valid_true_strs[0] if value else self._valid_false_strs[0]
def _do_convert_str_to_value(self, s):
return _str_case_in(s, self.case_sensitive, self._valid_true_strs)
def create_default_value(self):
return self.valid_false_strs[0]
class EnumValueType(ValueType[str]):
def __init__(self, valid_values: list[str], /, case_sensitive=False) -> None:
super().__init__(f"enum({'|'.join(valid_values)})", str)
self._case_sensitive = case_sensitive
self._valid_values = valid_values
@property
def case_sensitive(self) -> bool:
return self._case_sensitive
@property
def valid_values(self) -> list[str]:
return self._valid_values
def _do_check_value(self, value):
self._do_check_str_format(value)
def _do_check_str_format(self, s):
if not _str_case_in(s, self.case_sensitive, self.valid_values):
raise CruValueTypeError("Invalid enum value", s, self)
def _do_convert_value_to_str(self, value):
return value
def _do_convert_str_to_value(self, s):
return s
def create_default_value(self):
return self.valid_values[0]
TEXT_VALUE_TYPE = TextValueType()
INTEGER_VALUE_TYPE = IntegerValueType()
BOOLEAN_VALUE_TYPE = BooleanValueType()
class ValueGeneratorBase(Generic[_T], metaclass=ABCMeta):
@abstractmethod
def generate(self) -> _T:
raise NotImplementedError()
def __call__(self) -> _T:
return self.generate()
class ValueGenerator(ValueGeneratorBase[_T]):
def __init__(self, generate_func: Callable[[], _T]) -> None:
self._generate_func = generate_func
@property
def generate_func(self) -> Callable[[], _T]:
return self._generate_func
def generate(self) -> _T:
return self._generate_func()
class UuidValueGenerator(ValueGeneratorBase[str]):
def generate(self):
return str(uuid.uuid4())
class RandomStringValueGenerator(ValueGeneratorBase[str]):
def __init__(self, length: int, secure: bool) -> None:
self._length = length
self._secure = secure
@property
def length(self) -> int:
return self._length
@property
def secure(self) -> bool:
return self._secure
def generate(self):
random_func = secrets.choice if self._secure else random.choice
characters = string.ascii_letters + string.digits
random_string = "".join(random_func(characters) for _ in range(self._length))
return random_string
UUID_VALUE_GENERATOR = UuidValueGenerator()
|
