224 lines
8.4 KiB
Python
224 lines
8.4 KiB
Python
# The core application of the Mia project.
|
|
# by imacat <imacat@mail.imacat.idv.tw>, 2020/7/4
|
|
|
|
# Copyright (c) 2020 imacat.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""The views of the Mia core application.
|
|
|
|
"""
|
|
from typing import Dict, Type, Optional, Any
|
|
|
|
from dirtyfields import DirtyFieldsMixin
|
|
from django import forms
|
|
from django.contrib import messages
|
|
from django.contrib.messages.views import SuccessMessageMixin
|
|
from django.db.models import Model
|
|
from django.http import HttpResponse, HttpRequest, \
|
|
HttpResponseRedirect, Http404
|
|
from django.shortcuts import redirect, render
|
|
from django.urls import reverse
|
|
from django.views.generic import DeleteView as CoreDeleteView, \
|
|
RedirectView as CoreRedirectView
|
|
from django.views.generic.base import View
|
|
|
|
from . import stored_post, utils
|
|
from .models import BaseModel
|
|
from .utils import UrlBuilder
|
|
|
|
|
|
class RedirectView(CoreRedirectView):
|
|
"""The redirect view, with current_app at the current namespace."""
|
|
|
|
def get_redirect_url(self, *args, **kwargs):
|
|
url = reverse(self.pattern_name, kwargs=kwargs,
|
|
current_app=self.request.resolver_match.namespace)
|
|
if self.query_string and self.request.META["QUERY_STRING"] != "":
|
|
url = url + "?" + self.request.META["QUERY_STRING"]
|
|
return url
|
|
|
|
|
|
class FormView(View):
|
|
"""The base form view."""
|
|
model: Type[Model] = None
|
|
form_class: Type[forms.Form] = None
|
|
template_name: str = None
|
|
context_object_name: str = "form"
|
|
success_url: str = None
|
|
error_url: str = None
|
|
not_modified_message: str = None
|
|
success_message: str = None
|
|
|
|
def __init__(self, **kwargs):
|
|
super().__init__(**kwargs)
|
|
self.object: Optional[Model] = None
|
|
|
|
def dispatch(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
|
|
"""The view to store an accounting transaction."""
|
|
self.object = self.get_object()
|
|
if self.request.method == "POST":
|
|
return self.post(request, *args, **kwargs)
|
|
else:
|
|
return self.get(request, *args, **kwargs)
|
|
|
|
def get(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
|
|
"""Handles the GET requests."""
|
|
return render(self.request, self.get_template_name(),
|
|
self.get_context_data(**kwargs))
|
|
|
|
def post(self, request: HttpRequest, *args,
|
|
**kwargs) -> HttpResponseRedirect:
|
|
"""Handles the POST requests."""
|
|
form = self.get_form(**kwargs)
|
|
if not form.is_valid():
|
|
return self.form_invalid(form)
|
|
return self.form_valid(form)
|
|
|
|
def get_form_class(self) -> Type[forms.Form]:
|
|
"""Returns the form class."""
|
|
if self.form_class is None:
|
|
raise AttributeError("Please defined the form_class property.")
|
|
return self.form_class
|
|
|
|
@property
|
|
def _model(self):
|
|
if self.model is None:
|
|
raise AttributeError("Please defined the model property.")
|
|
return self.model
|
|
|
|
def get_context_data(self, **kwargs) -> Dict[str, Any]:
|
|
"""Returns the context data for the template."""
|
|
return {self.context_object_name: self.get_form()}
|
|
|
|
def get_form(self, **kwargs) -> forms.Form:
|
|
"""Returns the form for the template."""
|
|
if self.request.method == "POST":
|
|
post = self.request.POST.dict()
|
|
utils.strip_post(post)
|
|
return self.make_form_from_post(post)
|
|
else:
|
|
previous_post = stored_post.get_previous_post(self.request)
|
|
if previous_post is not None:
|
|
return self.make_form_from_post(previous_post)
|
|
if self.object is not None:
|
|
return self.make_form_from_model(self.object)
|
|
return self.get_form_class()()
|
|
|
|
def get_template_name(self) -> str:
|
|
"""Returns the name of the template."""
|
|
if self.template_name is not None:
|
|
return self.template_name
|
|
if self.model is not None:
|
|
app_name = self.request.resolver_match.app_name
|
|
model_name = self.model.__name__.lower()
|
|
return F"{app_name}/{model_name}_form.html"
|
|
raise AttributeError(
|
|
"Please either define the template_name or the model property.")
|
|
|
|
def make_form_from_post(self, post: Dict[str, str]) -> forms.Form:
|
|
"""Creates and returns the form from the POST data."""
|
|
return self.get_form_class()(post)
|
|
|
|
def make_form_from_model(self, obj: Model) -> forms.Form:
|
|
"""Creates and returns the form from a data model."""
|
|
form_class = self.get_form_class()
|
|
return form_class({x: getattr(obj, x, None)
|
|
for x in form_class.base_fields})
|
|
|
|
def fill_model_from_form(self, obj: Model, form: forms.Form) -> None:
|
|
"""Fills in the data model from the form."""
|
|
for name in form.fields:
|
|
setattr(obj, name, form[name].value())
|
|
if isinstance(obj, BaseModel):
|
|
obj.current_user = self.request.user
|
|
|
|
def form_invalid(self, form: forms.Form) -> HttpResponseRedirect:
|
|
"""Handles the action when the POST form is invalid."""
|
|
return stored_post.error_redirect(
|
|
self.request, self.get_error_url(), form.data)
|
|
|
|
def form_valid(self, form: forms.Form) -> HttpResponseRedirect:
|
|
"""Handles the action when the POST form is valid."""
|
|
if self.object is None:
|
|
self.object = self._model()
|
|
self.fill_model_from_form(self.object, form)
|
|
if isinstance(self.object, DirtyFieldsMixin)\
|
|
and not self.object.is_dirty(check_relationship=True):
|
|
message = self.get_not_modified_message(form.cleaned_data)
|
|
else:
|
|
self.object.save()
|
|
message = self.get_success_message(form.cleaned_data)
|
|
messages.success(self.request, message)
|
|
return redirect(str(UrlBuilder(self.get_success_url())
|
|
.query(r=self.request.GET.get("r"))))
|
|
|
|
def get_success_url(self) -> str:
|
|
"""Returns the URL on success."""
|
|
if self.success_url is not None:
|
|
return self.success_url
|
|
get_absolute_url = getattr(self.object, "get_absolute_url", None)
|
|
if get_absolute_url is not None:
|
|
return get_absolute_url()
|
|
raise AttributeError(
|
|
"Please define either the success_url property,"
|
|
" the get_absolute_url method on the data model,"
|
|
" or the get_success_url method.")
|
|
|
|
def get_error_url(self) -> str:
|
|
"""Returns the URL on error"""
|
|
if self.error_url is not None:
|
|
return self.error_url
|
|
return self.request.get_full_path()
|
|
|
|
def get_not_modified_message(self, cleaned_data: Dict[str, str]) -> str:
|
|
"""Returns the message when the data was not modified.
|
|
|
|
Args:
|
|
cleaned_data: The cleaned data of the form.
|
|
|
|
Returns:
|
|
The message when the data was not modified.
|
|
"""
|
|
return self.not_modified_message % cleaned_data
|
|
|
|
def get_success_message(self, cleaned_data: Dict[str, str]) -> str:
|
|
"""Returns the success message.
|
|
|
|
Args:
|
|
cleaned_data: The cleaned data of the form.
|
|
|
|
Returns:
|
|
The message when the data was not modified.
|
|
"""
|
|
return self.success_message % cleaned_data
|
|
|
|
def get_object(self) -> Optional[Model]:
|
|
"""Finds and returns the current object, or None on a create form."""
|
|
if "pk" in self.kwargs:
|
|
pk = self.kwargs["pk"]
|
|
try:
|
|
return self._model.objects.get(pk=pk)
|
|
except self._model.DoesNotExist:
|
|
raise Http404
|
|
return None
|
|
|
|
|
|
class DeleteView(SuccessMessageMixin, CoreDeleteView):
|
|
"""The delete form view, with SuccessMessageMixin."""
|
|
|
|
def delete(self, request, *args, **kwargs):
|
|
response = super(DeleteView, self).delete(request, *args, **kwargs)
|
|
messages.success(request, self.get_success_message({}))
|
|
return response
|