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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 CodeMirrorWidget(forms.Textarea):
"""Custom Textarea-based Widget that triggers a CodeMirror editor"""
# CodeMirror mode to enable
mode: str
def __init__(self, *args, mode="yaml", **kwargs):
super().__init__(*args, **kwargs)
self.mode = mode
def render(self, *args, **kwargs):
attrs = kwargs.setdefault("attrs", {})
attrs.setdefault("class", "")
attrs["class"] += " codemirror"
attrs["data-cm-mode"] = self.mode
return super().render(*args, **kwargs)
class InvalidYAMLInput(str):
"""Invalid YAML String type"""
class YAMLString(str):
"""YAML String type"""
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class YAMLField(forms.JSONField):
"""Django's JSON Field converted to YAML"""
default_error_messages = {
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"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(
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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
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return yaml.dump(value, explicit_start=True, default_flow_style=False)
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)