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1 | | -# Note: This is already implemented in the newer version of Django and need to use that instead of this only upgrade is done. |
2 | | -# Source: https://github.com/django/django/blob/main/django/db/models/enums.py |
3 | | - |
4 | | -import enum |
5 | | -from types import DynamicClassAttribute |
6 | | - |
7 | | -from django.utils.functional import Promise |
8 | | - |
9 | | -__all__ = ['Choices', 'IntegerChoices', 'TextChoices'] |
10 | | - |
11 | | - |
12 | | -class ChoicesMeta(enum.EnumMeta): |
13 | | - """A metaclass for creating a enum choices.""" |
14 | | - |
15 | | - def __new__(metacls, classname, bases, classdict, **kwds): |
16 | | - labels = [] |
17 | | - for key in classdict._member_names: |
18 | | - value = classdict[key] |
19 | | - if ( |
20 | | - isinstance(value, (list, tuple)) and |
21 | | - len(value) > 1 and |
22 | | - isinstance(value[-1], (Promise, str)) |
23 | | - ): |
24 | | - *value, label = value |
25 | | - value = tuple(value) |
26 | | - else: |
27 | | - label = key.replace('_', ' ').title() |
28 | | - labels.append(label) |
29 | | - # Use dict.__setitem__() to suppress defenses against double |
30 | | - # assignment in enum's classdict. |
31 | | - dict.__setitem__(classdict, key, value) |
32 | | - cls = super().__new__(metacls, classname, bases, classdict, **kwds) |
33 | | - for member, label in zip(cls.__members__.values(), labels): |
34 | | - member._label_ = label |
35 | | - return enum.unique(cls) |
36 | | - |
37 | | - def __contains__(cls, member): |
38 | | - if not isinstance(member, enum.Enum): |
39 | | - # Allow non-enums to match against member values. |
40 | | - return any(x.value == member for x in cls) |
41 | | - return super().__contains__(member) |
42 | | - |
43 | | - @property |
44 | | - def names(cls): |
45 | | - empty = ['__empty__'] if hasattr(cls, '__empty__') else [] |
46 | | - return empty + [member.name for member in cls] |
47 | | - |
48 | | - @property |
49 | | - def choices(cls): |
50 | | - empty = [(None, cls.__empty__)] if hasattr(cls, '__empty__') else [] |
51 | | - return empty + [(member.value, member.label) for member in cls] |
52 | | - |
53 | | - @property |
54 | | - def labels(cls): |
55 | | - return [label for _, label in cls.choices] |
56 | | - |
57 | | - @property |
58 | | - def values(cls): |
59 | | - return [value for value, _ in cls.choices] |
60 | | - |
61 | | - |
62 | | -class Choices(enum.Enum, metaclass=ChoicesMeta): |
63 | | - """Class for creating enumerated choices.""" |
64 | | - |
65 | | - @DynamicClassAttribute |
66 | | - def label(self): |
67 | | - return self._label_ |
68 | | - |
69 | | - @property |
70 | | - def do_not_call_in_templates(self): |
71 | | - return True |
72 | | - |
73 | | - def __str__(self): |
74 | | - """ |
75 | | - Use value when cast to str, so that Choices set as model instance |
76 | | - attributes are rendered as expected in templates and similar contexts. |
77 | | - """ |
78 | | - return str(self.value) |
79 | | - |
80 | | - # A similar format was proposed for Python 3.10. |
81 | | - def __repr__(self): |
82 | | - return f'{self.__class__.__qualname__}.{self._name_}' |
83 | | - |
84 | | - |
85 | | -class IntegerChoices(int, Choices): |
86 | | - """Class for creating enumerated integer choices.""" |
87 | | - pass |
88 | | - |
89 | | - |
90 | | -class TextChoices(str, Choices): |
91 | | - """Class for creating enumerated string choices.""" |
92 | | - |
93 | | - def _generate_next_value_(name, start, count, last_values): |
94 | | - return name |
| 1 | +from rest_framework import serializers |
| 2 | + |
| 3 | +from dref import enums as dref_enums |
| 4 | +from api import enums as api_enums |
| 5 | +from flash_update import enums as flash_update_enums |
| 6 | + |
| 7 | + |
| 8 | +apps_enum_register = [ |
| 9 | + ('dref', dref_enums.enum_register), |
| 10 | + ('api', api_enums.enum_register), |
| 11 | + ('flash_update', flash_update_enums.enum_register), |
| 12 | +] |
| 13 | + |
| 14 | + |
| 15 | +def underscore_to_camel(text): |
| 16 | + return text.replace('_', ' ').title().replace(' ', '') |
| 17 | + |
| 18 | + |
| 19 | +def generate_global_enum_register(): |
| 20 | + enum_map = {} |
| 21 | + enum_names = set() |
| 22 | + for app_prefix, app_enum_register in apps_enum_register: |
| 23 | + for enum_field, enum in app_enum_register.items(): |
| 24 | + # Change field dref_national_society_action_title -> DrefNationalSocietyActionTitle |
| 25 | + _enum_field = f'{app_prefix}_{enum_field}' |
| 26 | + enum_name = f'{underscore_to_camel(_enum_field)}EnumSerializer' |
| 27 | + if enum_name in enum_names: |
| 28 | + raise Exception(f'Duplicate enum_names found for {enum_name} in {enum_names}') |
| 29 | + enum_names.add(enum_name) |
| 30 | + enum_map[_enum_field] = (enum_name, enum) |
| 31 | + return enum_map |
| 32 | + |
| 33 | + |
| 34 | +global_enum_registers = generate_global_enum_register() |
| 35 | + |
| 36 | + |
| 37 | +def generate_enum_global_serializer(name): |
| 38 | + def _get_enum_key_value_serializer(enum, enum_name): |
| 39 | + return type( |
| 40 | + enum_name, |
| 41 | + (serializers.Serializer,), |
| 42 | + { |
| 43 | + 'key': serializers.ChoiceField(enum.choices), |
| 44 | + 'value': serializers.CharField(), |
| 45 | + }, |
| 46 | + ) |
| 47 | + |
| 48 | + fields = {} |
| 49 | + for enum_field, (enum_name, enum) in global_enum_registers.items(): |
| 50 | + fields[enum_field] = _get_enum_key_value_serializer(enum, enum_name)(many=True, required=False) |
| 51 | + return type(name, (serializers.Serializer,), fields) |
| 52 | + |
| 53 | + |
| 54 | +GlobalEnumSerializer = generate_enum_global_serializer('GlobalEnumSerializer') |
| 55 | + |
| 56 | + |
| 57 | +def get_enum_values(): |
| 58 | + enum_data = { |
| 59 | + enum_field: [ |
| 60 | + { |
| 61 | + 'key': key, |
| 62 | + 'value': value, |
| 63 | + } |
| 64 | + for key, value in enum.choices |
| 65 | + ] |
| 66 | + for enum_field, (_, enum) in global_enum_registers.items() |
| 67 | + } |
| 68 | + return GlobalEnumSerializer(enum_data).data |
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