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authentik/passbook/admin/fields.py

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"""YAML fields"""
import yaml
from django import forms
from django.utils.translation import gettext_lazy as _
class InvalidYAMLInput(str):
"""Invalid YAML String type"""
class YAMLString(str):
"""YAML String type"""
class YAMLField(forms.CharField):
"""Django's JSON Field converted to YAML"""
default_error_messages = {
'invalid': _("'%(value)s' value must be valid YAML."),
}
widget = forms.Textarea
def to_python(self, value):
if self.disabled:
return value
if value in self.empty_values:
return None
if isinstance(value, (list, dict, int, float, YAMLString)):
return value
try:
converted = yaml.safe_load(value)
except yaml.YAMLError:
raise forms.ValidationError(
self.error_messages['invalid'],
code='invalid',
params={'value': value},
)
if isinstance(converted, str):
return YAMLString(converted)
return converted
def bound_data(self, data, initial):
if self.disabled:
return initial
try:
return yaml.safe_load(data)
except yaml.YAMLError:
return InvalidYAMLInput(data)
def prepare_value(self, value):
if isinstance(value, InvalidYAMLInput):
return value
return yaml.dump(value, explicit_start=True)
def has_changed(self, initial, data):
if super().has_changed(initial, data):
return True
# For purposes of seeing whether something has changed, True isn't the
# same as 1 and the order of keys doesn't matter.
data = self.to_python(data)
return yaml.dump(initial, sort_keys=True) != yaml.dump(data, sort_keys=True)