From 1de84e17c9a0557b0dd1aa093f5c6a47dbc762ab Mon Sep 17 00:00:00 2001
From: Mark Veidemanis <m@zm.is>
Date: Thu, 3 Nov 2022 07:20:30 +0000
Subject: [PATCH] Add CRUD template views

---
 core/views/__init__.py | 257 +++++++++++++++++++++++++++++++++++++++++
 core/views/base.py     |   1 +
 2 files changed, 258 insertions(+)

diff --git a/core/views/__init__.py b/core/views/__init__.py
index e69de29..a2c2fa5 100644
--- a/core/views/__init__.py
+++ b/core/views/__init__.py
@@ -0,0 +1,257 @@
+import uuid
+
+from django.http import Http404, HttpResponseBadRequest
+from django.urls import reverse
+from django.views.generic.detail import DetailView
+from django.views.generic.edit import CreateView, DeleteView, UpdateView
+from django.views.generic.list import ListView
+from rest_framework.parsers import FormParser
+
+from core.util import logs
+
+log = logs.get_logger(__name__)
+
+
+class ObjectList(ListView):
+    allowed_types = ["modal", "widget", "window", "page"]
+    window_content = "window-content/objects.html"
+    list_template = None
+
+    model = None
+    context_object_name = "objects"
+    context_object_name_singular = "object"
+    page_title = None
+    page_subtitle = None
+
+    title = "Objects"
+    title_singular = "Object"
+
+    list_url_name = None
+    # WARNING: TAKEN FROM locals()
+    list_url_args = ["type"]
+
+    submit_url_name = None
+
+    delete_all_url_name = None
+
+    # copied from BaseListView
+    def get(self, request, *args, **kwargs):
+        self.object_list = self.get_queryset()
+        allow_empty = self.get_allow_empty()
+
+        type = kwargs.get("type", None)
+        if not type:
+            return HttpResponseBadRequest("No type specified")
+        if type not in self.allowed_types:
+            return HttpResponseBadRequest("Invalid type specified")
+        self.template_name = f"wm/{type}.html"
+        unique = str(uuid.uuid4())[:8]
+
+        list_url_args = {}
+        for arg in self.list_url_args:
+            list_url_args[arg] = locals()[arg]
+
+        if type == "page":
+            type = "modal"
+
+        if not allow_empty:
+            # When pagination is enabled and object_list is a queryset,
+            # it's better to do a cheap query than to load the unpaginated
+            # queryset in memory.
+            if self.get_paginate_by(self.object_list) is not None and hasattr(
+                self.object_list, "exists"
+            ):
+                is_empty = not self.object_list.exists()
+            else:
+                is_empty = not self.object_list
+            if is_empty:
+                raise Http404("Empty list")
+        submit_url = reverse(self.submit_url_name, kwargs={"type": type})
+
+        list_url = reverse(self.list_url_name, kwargs=list_url_args)
+        context = self.get_context_data()
+        context["title"] = self.title + f" ({type})"
+        context["title_singular"] = self.title_singular
+        context["unique"] = unique
+        context["window_content"] = self.window_content
+        context["list_template"] = self.list_template
+        context["page_title"] = self.page_title
+        context["page_subtitle"] = self.page_subtitle
+        context["type"] = type
+        context["submit_url"] = submit_url
+        context["list_url"] = list_url
+        context["context_object_name"] = self.context_object_name
+        context["context_object_name_singular"] = self.context_object_name_singular
+        if self.delete_all_url_name:
+            context["delete_all_url"] = reverse(self.delete_all_url_name)
+
+        # Return partials for HTMX
+        if self.request.htmx:
+            self.template_name = self.list_template
+        return self.render_to_response(context)
+
+
+class ObjectCreate(CreateView):
+    allowed_types = ["modal", "widget", "window", "page"]
+    window_content = "window-content/object-form.html"
+    parser_classes = [FormParser]
+
+    model = None
+    context_object_name = "objects"
+    submit_url_name = None
+
+    list_url_name = None
+    # WARNING: TAKEN FROM locals()
+    list_url_args = ["type"]
+
+    request = None
+
+    def post_save(self, obj):
+        pass
+
+    def form_valid(self, form):
+        obj = form.save(commit=False)
+        if self.request is None:
+            raise Exception("Request is None")
+        obj.user = self.request.user
+        obj.save()
+        form.save_m2m()
+        self.post_save(obj)
+        context = {"message": "Object created", "class": "success"}
+        response = self.render_to_response(context)
+        response["HX-Trigger"] = f"{self.context_object_name_singular}Event"
+        return response
+
+    def get(self, request, *args, **kwargs):
+        self.request = request
+        type = kwargs.get("type", None)
+        if not type:
+            return HttpResponseBadRequest("No type specified")
+        if type not in self.allowed_types:
+            return HttpResponseBadRequest("Invalid type specified")
+        self.template_name = f"wm/{type}.html"
+        unique = str(uuid.uuid4())[:8]
+
+        list_url_args = {}
+        for arg in self.list_url_args:
+            list_url_args[arg] = locals()[arg]
+
+        if type == "page":
+            type = "modal"
+
+        self.object = None
+        submit_url = reverse(self.submit_url_name, kwargs={"type": type})
+
+        list_url = reverse(self.list_url_name, kwargs=list_url_args)
+        context = self.get_context_data()
+        context["unique"] = unique
+        context["window_content"] = self.window_content
+        context["context_object_name"] = self.context_object_name
+        context["context_object_name_singular"] = self.context_object_name_singular
+        context["submit_url"] = submit_url
+        context["list_url"] = list_url
+        context["type"] = type
+        return self.render_to_response(context)
+
+    def post(self, request, *args, **kwargs):
+        self.request = request
+        self.template_name = "partials/notify.html"
+        return super().post(request, *args, **kwargs)
+
+
+class ObjectRead(DetailView):
+    allowed_types = ["modal", "widget", "window", "page"]
+    window_content = "window-content/object.html"
+
+    model = None
+    context_object_name = "object"
+
+
+class ObjectUpdate(UpdateView):
+    allowed_types = ["modal", "widget", "window", "page"]
+    window_content = "window-content/object-form.html"
+    parser_classes = [FormParser]
+
+    model = None
+    context_object_name = "objects"
+    submit_url_name = None
+
+    request = None
+
+    def post_save(self, obj):
+        pass
+
+    def form_valid(self, form):
+        obj = form.save(commit=False)
+        if self.request is None:
+            raise Exception("Request is None")
+        obj.save()
+        form.save_m2m()
+        self.post_save(obj)
+        context = {"message": "Object updated", "class": "success"}
+        response = self.render_to_response(context)
+        response["HX-Trigger"] = f"{self.context_object_name_singular}Event"
+        return response
+
+    def get(self, request, *args, **kwargs):
+        self.request = request
+        type = kwargs.get("type", None)
+        pk = kwargs.get("pk", None)
+        if not type:
+            return HttpResponseBadRequest("No type specified")
+        if not pk:
+            return HttpResponseBadRequest("No pk specified")
+        if type not in self.allowed_types:
+            return HttpResponseBadRequest("Invalid type specified")
+        self.template_name = f"wm/{type}.html"
+        unique = str(uuid.uuid4())[:8]
+        if type == "page":
+            type = "modal"
+
+        self.object = self.get_object()
+        submit_url = reverse(self.submit_url_name, kwargs={"type": type, "pk": pk})
+        context = self.get_context_data()
+        context["unique"] = unique
+        context["window_content"] = self.window_content
+        context["context_object_name"] = self.context_object_name
+        context["context_object_name_singular"] = self.context_object_name_singular
+        context["submit_url"] = submit_url
+        context["type"] = type
+        return self.render_to_response(context)
+
+    def post(self, request, *args, **kwargs):
+        self.request = request
+        self.template_name = "partials/notify.html"
+        return super().post(request, *args, **kwargs)
+
+
+class ObjectDelete(DeleteView):
+    model = None
+    context_object_name_singular = "object"
+    template_name = "partials/notify.html"
+
+    # Overriden to prevent success URL from being used
+    def delete(self, request, *args, **kwargs):
+        """
+        Call the delete() method on the fetched object and then redirect to the
+        success URL.
+        """
+        self.object = self.get_object()
+        # success_url = self.get_success_url()
+        self.object.delete()
+        context = {"message": "Object deleted", "class": "success"}
+        response = self.render_to_response(context)
+        response["HX-Trigger"] = f"{self.context_object_name_singular}Event"
+        return response
+
+    # This will be used in newer Django versions, until then we get a warning
+    def form_valid(self, form):
+        """
+        Call the delete() method on the fetched object.
+        """
+        self.object = self.get_object()
+        self.object.delete()
+        context = {"message": "Object deleted", "class": "success"}
+        response = self.render_to_response(context)
+        response["HX-Trigger"] = f"{self.context_object_name_singular}Event"
+        return response
diff --git a/core/views/base.py b/core/views/base.py
index 6347332..71f5ed4 100644
--- a/core/views/base.py
+++ b/core/views/base.py
@@ -96,6 +96,7 @@ class Signup(CreateView):
             return render(request, "registration/registration_closed.html")
         super().get(request, *args, **kwargs)
 
+
 class Portal(LoginRequiredMixin, View):
     async def get(self, request):
         if not settings.STRIPE_ENABLED: