manuels-scolaires/manuels/views.py

import logging

from django.contrib import messages
from django.http import HttpResponseRedirect, JsonResponse
from django.shortcuts import redirect
from django.urls import reverse
from django.views.decorators.cache import cache_page
from django.views.generic import CreateView, DeleteView, TemplateView, UpdateView

from manuels.forms import AddBookForm, AddSuppliesForm, EditBookForm, EditSuppliesForm
from manuels.models import Book, CommonSupply, ISBNError, SuppliesRequirement, Teacher

logger = logging.getLogger(__name__)


class HomePageView(CreateView):
    model = Teacher
    fields = ["first_name", "last_name", "phone_number", "email"]
    template_name = "manuels/home_page.html"

    def get(self, request, *args, **kwargs):
        teacher_pk = request.session.get("teacher_pk")
        if teacher_pk:
            return redirect("list_books", pk=teacher_pk)

        return super().get(request, *args, **kwargs)

    def form_valid(self, form):
        response = super().form_valid(form)
        self.object.send_link(self.request)
        return response


class BaseTeacherView:
    teacher = None
    teacher_field = "pk"

    def dispatch(self, request, *args, **kwargs):
        self.teacher = Teacher.objects.filter(
            pk=self.kwargs[self.teacher_field]
        ).first()
        if not self.teacher:
            messages.warning(
                request,
                "Impossible de trouver le coordonnateur demandé. Si vous pensez que ceci est "
                "une erreur, merci de vous adresser à votre documentaliste.",
            )
            return redirect("clear_teacher")
        request.session["teacher_pk"] = str(self.teacher.pk)
        return super().dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super().get_context_data()
        context["teacher"] = self.teacher

        return context


class ListBooksView(BaseTeacherView, TemplateView):
    template_name = "manuels/list_books_supplies.html"


class ItemView(BaseTeacherView):
    add_another = False
    item_text = None
    item_text_plural = None
    success_target = None
    message_template = None
    verb = None
    button_class = "primary"
    button_icon = "fas fa-check-circle"

    def dispatch(self, request, *args, **kwargs):
        response = super().dispatch(request, *args, **kwargs)
        if self.teacher and self.teacher.has_confirmed_list:
            messages.error(
                request,
                "Vous avez déjà confirmé vos listes. Il n'est plus possible de les modifier.",
            )
            return redirect("list_books", pk=self.teacher.pk)
        return response

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["item"] = self.item_text
        context["item_plural"] = self.item_text_plural
        context["message_template"] = self.message_template
        context["verb"] = self.verb
        context["button_class"] = self.button_class
        context["button_icon"] = self.button_icon
        return context

    def get_initial(self):
        return {"teacher": self.teacher}

    def get_form(self, form_class=None):
        form = super().get_form(form_class)
        form.fields["teacher"].queryset = Teacher.objects.filter(pk=self.teacher.pk)
        return form


class AddItemView(ItemView, CreateView):
    verb = "Ajouter"
    button_icon = "fas fa-plus-circle"

    def get_success_url(self):
        if self.add_another:
            return reverse(self.success_target, args=[str(self.teacher.pk)])
        else:
            return reverse("list_books", args=[str(self.teacher.pk)])

    def form_valid(self, form):
        self.add_another = form.cleaned_data["add_another"]
        return HttpResponseRedirect(self.get_success_url())


class BookView:
    model = Book
    success_target = "add_book"
    item_text = "un livre"
    item_text_plural = "livres"


class AddBookView(BookView, AddItemView):
    form_class = AddBookForm
    template_name = "manuels/add_book.html"

    def form_valid(self, form: AddBookForm):
        for level in form.cleaned_data["levels"]:
            book = Book.objects.create(
                teacher=form.cleaned_data["teacher"],
                level=level,
                field=form.cleaned_data["field"],
                title=form.cleaned_data["title"],
                authors=form.cleaned_data["authors"],
                editor=form.cleaned_data["editor"],
                other_editor=form.cleaned_data["other_editor"],
                publication_year=form.cleaned_data["publication_year"],
                isbn=form.cleaned_data["isbn"],
                price=form.cleaned_data["price"],
                previously_acquired=form.cleaned_data["previously_acquired"],
                comments=form.cleaned_data["comments"],
                consumable=form.cleaned_data["consumable"],
            )
            messages.success(self.request, f'"{book}" a été ajouté.')

        return super().form_valid(form)


class SuppliesView:
    model = SuppliesRequirement
    success_target = "add_supplies"
    item_text = "des fournitures"
    item_text_plural = "fournitures"


class AddSuppliesView(SuppliesView, AddItemView):
    form_class = AddSuppliesForm
    message_template = "manuels/supplies_message.html"
    template_name = "manuels/add_supplies.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["common_supplies"] = CommonSupply.objects.all()
        return context

    def form_valid(self, form: AddBookForm):
        for level in form.cleaned_data["levels"]:
            supplies = SuppliesRequirement.objects.create(
                teacher=form.cleaned_data["teacher"],
                level=level,
                field=form.cleaned_data["field"],
                supplies=form.cleaned_data["supplies"],
            )
            messages.success(self.request, f'"{supplies}" a été ajouté.')

        return super().form_valid(form)


class EditItemView(ItemView, UpdateView):
    teacher_field = "teacher_pk"
    item_text = None
    item_text_plural = None
    message_template = None
    verb = "Modifier"

    def get_queryset(self):
        return self.model.objects.filter(teacher=self.teacher)

    def get_success_url(self):
        messages.success(self.request, f'"{self.object}" a été modifié.')
        return reverse("list_books", args=[str(self.teacher.pk)])


class EditBookView(BookView, EditItemView):
    form_class = EditBookForm
    template_name = "manuels/add_book.html"


class EditSuppliesView(SuppliesView, EditItemView):
    form_class = EditSuppliesForm
    template_name = "manuels/add_supplies.html"


class DeleteItemView(ItemView, DeleteView):
    teacher_field = "teacher_pk"
    item_text = None
    item_text_plural = None
    message_template = "manuels/confirm_delete.html"
    verb = "Supprimer"
    button_class = "danger"
    button_icon = "fas fa-trash"
    template_name = "manuels/add_supplies.html"

    def get_queryset(self):
        return self.model.objects.filter(teacher=self.teacher)

    def get_success_url(self):
        messages.success(self.request, f'"{self.object}" a été supprimé.')
        return reverse("list_books", args=[str(self.teacher.pk)])


class DeleteBookView(BookView, DeleteItemView):
    pass


class DeleteSuppliesView(SuppliesView, DeleteItemView):
    pass


def clear_teacher_view(request):
    if "teacher_pk" in request.session:
        del request.session["teacher_pk"]
    return redirect("home_page")


class ConfirmTeacherView(BaseTeacherView, UpdateView):
    model = Teacher
    fields = []
    template_name = "manuels/confirm_teacher.html"

    def form_valid(self, form):
        response = super().form_valid(form)
        self.object.has_confirmed_list = True
        self.object.save()
        self.object.send_confirmation(request=self.request)
        messages.success(
            self.request,
            "Vos listes ont été validées. Votre documentaliste a été notifiée par email.",
        )
        return response


# We are able to cache the response because it's very unlikely that the details of a book will change through time
@cache_page(2 * 60 * 60)
def isbn_api(request, isbn):
    try:
        return JsonResponse(Book.fetch_from_decitre(isbn))
    except ISBNError as e:
        return JsonResponse(e.data)