forked from CGM_Public/pretix_original
1d0c148170
* Fix #467 -- Pluggable email placeholders * Previews * Polishing * Fix tests * Add missing doc file
45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
import re
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from django.core.exceptions import ValidationError
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from django.core.validators import BaseValidator
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from django.utils.translation import ugettext_lazy as _
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from i18nfield.strings import LazyI18nString
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class PlaceholderValidator(BaseValidator):
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"""
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Takes list of allowed placeholders,
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validates form field by checking for placeholders,
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which are not presented in taken list.
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"""
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def __init__(self, limit_value):
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super().__init__(limit_value)
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self.limit_value = limit_value
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def __call__(self, value):
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if isinstance(value, LazyI18nString):
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for l, v in value.data.items():
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self.__call__(v)
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return
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if value.count('{') != value.count('}'):
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raise ValidationError(
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_('Invalid placeholder syntax: You used a different number of "{" than of "}".'),
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code='invalid_placeholder_syntax',
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)
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data_placeholders = list(re.findall(r'({[^}]*})', value, re.X))
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invalid_placeholders = []
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for placeholder in data_placeholders:
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if placeholder not in self.limit_value:
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invalid_placeholders.append(placeholder)
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if invalid_placeholders:
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raise ValidationError(
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_('Invalid placeholder(s): %(value)s'),
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code='invalid_placeholders',
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params={'value': ", ".join(invalid_placeholders,)})
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def clean(self, x):
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return x
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