Enable file drag and drop on transaction details page

Close #37

nummi/main/forms.py

@@ -12,7 +12,8 @@ class NummiForm(forms.ModelForm):
     template_name = "main/form/form_base.html"
     meta_fieldsets = []
 
-    def __init__(self, *args, user, **kwargs):
+    def __init__(self, *args, **kwargs):
+        kwargs.pop("user", None)
         super().__init__(*args, **kwargs)
 
     @property

nummi/main/static/main/css/form.css

@@ -1,8 +1,32 @@
-@keyframes border-pulse {
-  from {
-    border-color: var(--green);
+.drop-zone {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  grid-template-columns: 1fr;
+  grid-template-rows: 1fr;
+  align-items: center;
+  text-align: center;
+  color: transparent;
+  display: grid;
+  transition-property: backdrop-filter;
+  transition-duration: 750ms;
+  z-index: -1;
+
+  > span {
+    font-weight: 650;
+    font-size: 2rem;
+    transition-property: color;
+    transition-duration: inherit;
   }
-  to {
+
+  main.highlight > & {
+    z-index: 100;
+    backdrop-filter: blur(0.1rem);
+    > span {
+      color: var(--green);
+    }
   }
 }
 
@@ -14,6 +38,10 @@ form {
     grid-template-columns: 1fr;
   }
 
+  &.hidden {
+    display: none;
+  }
+
   .column {
     display: grid;
     gap: 0.5rem;

nummi/main/static/main/css/main.css

@@ -85,6 +85,7 @@ footer {
   @media (width > 720px) {
     padding: 2rem;
   }
+  background: var(--bg);
 }
 main {
   position: relative;

nummi/main/templatetags/main_extras.py

@@ -59,7 +59,7 @@ def messageicon(level):
 
 @register.filter
 def extension(file):
-    return file.name.split(".")[-1].upper()
+    return file.name.split(".", 1)[1].upper()
 
 
 @register.filter

nummi/statement/forms.py

@@ -25,7 +25,7 @@ class StatementForm(NummiForm):
     ]
 
     def __init__(self, *args, **kwargs):
-        _user = kwargs.get("user")
+        _user = kwargs.pop("user")
         _disable_account = kwargs.pop("disable_account", False)
         super().__init__(*args, **kwargs)
         self.fields["account"].queryset = _user.account_set.exclude(archived=True)

nummi/transaction/forms.py

@@ -1,6 +1,8 @@
 import json
 
 from category.forms import CategorySelect
+from django import forms
+from django.forms import formset_factory
 from main.forms import DatalistInput, NummiFileInput, NummiForm
 from statement.forms import StatementSelect
 
@@ -46,7 +48,7 @@ class TransactionForm(NummiForm):
     ]
 
     def __init__(self, *args, **kwargs):
-        _user = kwargs.get("user")
+        _user = kwargs.pop("user")
         _disable_statement = kwargs.pop("disable_statement", False)
         _autocomplete = kwargs.pop("autocomplete", False)
         super().__init__(*args, **kwargs)
@@ -117,3 +119,29 @@ class InvoiceForm(NummiForm):
         widgets = {
             "file": NummiFileInput,
         }
+
+
+class MultipleFileInput(forms.ClearableFileInput):
+    allow_multiple_selected = True
+
+
+class MultipleFileField(forms.FileField):
+    def __init__(self, *args, **kwargs):
+        kwargs.setdefault("widget", MultipleFileInput())
+        super().__init__(*args, **kwargs)
+
+    def clean(self, data, initial=None):
+        single_file_clean = super().clean
+        if isinstance(data, (list, tuple)):
+            result = [single_file_clean(d, initial) for d in data]
+        else:
+            result = single_file_clean(data, initial)
+        return result
+
+
+class MultipleInvoicesForm(forms.Form):
+    prefix = "invoices"
+    invoices = MultipleFileField()
+
+
+InvoicesFormSet = formset_factory(MultipleInvoicesForm)

nummi/transaction/static/transaction/js/invoice_form.js

@@ -0,0 +1,22 @@
+const dropArea = document.querySelector("main");
+const form = document.querySelector("form.invoices");
+
+dropArea.addEventListener("dragover", (event) => {
+  event.preventDefault();
+  dropArea.classList.add("highlight");
+});
+
+dropArea.addEventListener("dragleave", () => {
+  dropArea.classList.remove("highlight");
+});
+
+dropArea.addEventListener("drop", (event) => {
+  console.log(event);
+  event.preventDefault();
+  dropArea.classList.remove("highlight");
+  const files = event.dataTransfer.files;
+  console.log(files);
+  const input = form.querySelector("input[type=file]");
+  input.files = files;
+  form.submit();
+});

nummi/transaction/templates/transaction/transaction_detail.html

@@ -10,6 +10,7 @@
   {% css "main/css/form.css" %}
   {% css "main/css/table.css" %}
   {% css "main/css/plot.css" %}
+  {% js "transaction/js/invoice_form.js" %}
 {% endblock link %}
 {% block body %}
   <h2>{{ transaction }}</h2>
@@ -44,5 +45,15 @@
   <section>
     <h3>{% translate "Invoices" %}</h3>
     {% invoice_table transaction %}
+    <form class="hidden invoices"
+          method="post"
+          action="{% url "multiple_invoice" transaction=transaction.pk %}"
+          enctype="multipart/form-data">
+      {% csrf_token %}
+      {{ invoices_form }}
+    </form>
   </section>
+  <div class="drop-zone">
+    <span class="wi">{{ "file-add"|remix }}{% translate "Add invoice" %}</span>
+  </div>
 {% endblock body %}

nummi/transaction/urls.py

@@ -31,6 +31,11 @@ urlpatterns = [
         views.InvoiceCreateView.as_view(),
         name="new_invoice",
     ),
+    path(
+        "<transaction>/invoice/multiple",
+        views.MultipleInvoiceCreateView.as_view(),
+        name="multiple_invoice",
+    ),
     path(
         "<transaction>/invoice/<invoice>",
         views.InvoiceUpdateView.as_view(),

nummi/transaction/views.py

@@ -1,8 +1,13 @@
 from account.models import Account
 from category.models import Category
+from django.contrib import messages
+from django.forms import ValidationError
 from django.shortcuts import get_object_or_404
 from django.urls import reverse_lazy
+from django.utils.html import format_html
+from django.utils.translation import gettext as _
 from django.views.generic.dates import MonthArchiveView, YearArchiveView
+from django.views.generic.edit import FormView
 from history.utils import history
 from main.views import (
     NummiCreateView,
@@ -13,7 +18,7 @@ from main.views import (
     UserMixin,
 )
 
-from .forms import InvoiceForm, TransactionForm
+from .forms import InvoiceForm, MultipleInvoicesForm, TransactionForm
 from .models import Invoice, Transaction
 
 
@@ -57,6 +62,45 @@ class InvoiceCreateView(NummiCreateView):
         return reverse_lazy("transaction", args=(self.object.transaction.pk,))
 
 
+class MultipleInvoiceCreateView(FormView):
+    form_class = MultipleInvoicesForm
+
+    def form_valid(self, form):
+        transaction = get_object_or_404(
+            self.request.user.transaction_set, pk=self.kwargs["transaction"]
+        )
+
+        invoices = []
+        for file in form.cleaned_data["invoices"]:
+            invoice = Invoice(
+                transaction=transaction,
+                user=self.request.user,
+                file=file,
+                name=file.name.split(".", 1)[0],
+            )
+            try:
+                invoice.full_clean()
+            except ValidationError as err:
+                for msg in err.messages:
+                    messages.error(
+                        self.request,
+                        format_html(
+                            "{msg} {file}. {err}",
+                            msg=_("Error processing file"),
+                            file=file.name,
+                            err=msg,
+                        ),
+                    )
+            else:
+                invoices.append(invoice)
+
+        Invoice.objects.bulk_create(invoices)
+        return super().form_valid(form)
+
+    def get_success_url(self):
+        return reverse_lazy("transaction", args=(self.kwargs["transaction"],))
+
+
 class TransactionUpdateView(NummiUpdateView):
     model = Transaction
     form_class = TransactionForm
@@ -70,12 +114,8 @@ class TransactionDetailView(NummiDetailView):
 
     def get_context_data(self, **kwargs):
         data = super().get_context_data(**kwargs)
-        transaction = data.get("transaction")
-
-        return data | {
-            "statement": transaction.statement,
-            "category": transaction.category,
-        }
+        data["invoices_form"] = MultipleInvoicesForm()
+        return data
 
 
 class InvoiceUpdateView(NummiUpdateView):