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# -*- coding: utf-8 -*-
import importlib
from functools import wraps
from flask import render_template, request
from wtforms.validators import Regexp, ValidationError
# using http://flask.pocoo.org/docs/patterns/viewdecorators/
def templated(template=None):
def templated_(f):
@wraps(f)
def templated__(*args, **kwargs):
template_name = template
if template_name is None:
template_name = request.endpoint \
.replace('.', '/') + '.html'
ctx = f(*args, **kwargs)
if ctx is None:
ctx = {}
elif not isinstance(ctx, dict):
return ctx
return render_template(template_name, **ctx)
return templated__
return templated_
def ensure_utf8(s):
if isinstance(s, str):
s = s.encode('utf8')
return s
class NotRegexp(Regexp):
"""
Like wtforms.validators.Regexp, but rejects data that DOES match the regex.
"""
def __call__(self, form, field):
if self.regex.match(field.data or ''):
if self.message is None:
self.message = field.gettext('Invalid input.')
raise ValidationError(self.message)
def get_backend(path, app):
module = path.rsplit(".", 1).pop()
class_name = '%sBackend' % module.title()
backend_class = getattr(importlib.import_module(path), class_name)
return backend_class(app)
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