1import functools
2import uuid
3
4
5class IntConverter:
6 regex = "[0-9]+"
7
8 def to_python(self, value):
9 return int(value)
10
11 def to_url(self, value):
12 return str(value)
13
14
15class StringConverter:
16 regex = "[^/]+"
17
18 def to_python(self, value):
19 return value
20
21 def to_url(self, value):
22 return value
23
24
25class UUIDConverter:
26 regex = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}"
27
28 def to_python(self, value):
29 return uuid.UUID(value)
30
31 def to_url(self, value):
32 return str(value)
33
34
35class SlugConverter(StringConverter):
36 regex = "[-a-zA-Z0-9_]+"
37
38
39class PathConverter(StringConverter):
40 regex = ".+"
41
42
43DEFAULT_CONVERTERS = {
44 "int": IntConverter(),
45 "path": PathConverter(),
46 "slug": SlugConverter(),
47 "str": StringConverter(),
48 "uuid": UUIDConverter(),
49}
50
51
52REGISTERED_CONVERTERS = {}
53
54
55def register_converter(converter, type_name):
56 REGISTERED_CONVERTERS[type_name] = converter()
57 get_converters.cache_clear()
58
59
60@functools.cache
61def get_converters():
62 return {**DEFAULT_CONVERTERS, **REGISTERED_CONVERTERS}
63
64
65def get_converter(raw_converter):
66 return get_converters()[raw_converter]