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# -*- coding: utf-8 -*-
import importlib
from functools import wraps
from flask import render_template, request, Flask
from wtforms.validators import Regexp, ValidationError
from typing import Optional, Callable, Any
# using http://flask.pocoo.org/docs/patterns/viewdecorators/
def templated(
template: Optional[str] = None,
) -> Callable[..., Callable[..., str]]:
def templated_(f: Callable[..., str]) -> Callable[..., str]:
@wraps(f)
def templated__(*args: list[Any], **kwargs: dict[str, Any]) -> str:
template_name = template
if template_name is None:
if request.endpoint:
template_name = (
request.endpoint.replace(".", "/") + ".html"
)
else:
template_name = "error.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_
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: str = field.gettext("Invalid input.")
raise ValidationError(self.message)
def get_backend(path: str, app: Flask):
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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