feat: add exchange rate config page

app/apps/currencies/forms.py

@@ -6,7 +6,8 @@ from django.forms import CharField
 from django.utils.translation import gettext_lazy as _
 
 from apps.common.widgets.crispy.submit import NoClassSubmit
-from apps.currencies.models import Currency
+from apps.common.widgets.decimal import ArbitraryDecimalDisplayNumberInput
+from apps.currencies.models import Currency, ExchangeRate
 
 
 class CurrencyForm(forms.ModelForm):
@@ -43,3 +44,42 @@ class CurrencyForm(forms.ModelForm):
                     ),
                 ),
             )
+
+
+class ExchangeRateForm(forms.ModelForm):
+    date = forms.DateTimeField(
+        widget=forms.DateTimeInput(
+            attrs={"type": "datetime-local"}, format="%Y-%m-%dT%H:%M"
+        )
+    )
+
+    class Meta:
+        model = ExchangeRate
+        fields = ["from_currency", "to_currency", "rate", "date"]
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.helper = FormHelper()
+        self.helper.form_tag = False
+        self.helper.form_method = "post"
+        self.helper.layout = Layout("date", "from_currency", "to_currency", "rate")
+
+        self.fields["rate"].widget = ArbitraryDecimalDisplayNumberInput()
+
+        if self.instance and self.instance.pk:
+            self.helper.layout.append(
+                FormActions(
+                    NoClassSubmit(
+                        "submit", _("Update"), css_class="btn btn-outline-primary w-100"
+                    ),
+                ),
+            )
+        else:
+            self.helper.layout.append(
+                FormActions(
+                    NoClassSubmit(
+                        "submit", _("Add"), css_class="btn btn-outline-primary w-100"
+                    ),
+                ),
+            )

app/apps/currencies/urls.py

@@ -16,4 +16,17 @@ urlpatterns = [
         views.currency_delete,
         name="currency_delete",
     ),
+    path("exchange-rates/", views.exchange_rates_index, name="exchange_rates_index"),
+    path("exchange-rates/list/", views.exchange_rates_list, name="exchange_rates_list"),
+    path("exchange-rates/add/", views.exchange_rate_add, name="exchange_rate_add"),
+    path(
+        "exchange-rates/<int:pk>/edit/",
+        views.exchange_rate_edit,
+        name="exchange_rate_edit",
+    ),
+    path(
+        "exchange-rates/<int:pk>/delete/",
+        views.exchange_rate_delete,
+        name="exchange_rate_delete",
+    ),
 ]

app/apps/currencies/views/__init__.py

@@ -0,0 +1,2 @@
+from .currencies import *
+from .exchange_rates import *

app/apps/currencies/views/exchange_rates.py

@@ -0,0 +1,105 @@
+from django.contrib import messages
+from django.contrib.auth.decorators import login_required
+from django.http import HttpResponse
+from django.shortcuts import render, get_object_or_404
+from django.utils.translation import gettext_lazy as _
+from django.views.decorators.csrf import csrf_exempt
+from django.views.decorators.http import require_http_methods
+
+from apps.common.decorators.htmx import only_htmx
+from apps.currencies.forms import ExchangeRateForm
+from apps.currencies.models import ExchangeRate
+
+
+@login_required
+@require_http_methods(["GET"])
+def exchange_rates_index(request):
+    return render(
+        request,
+        "exchange_rates/pages/index.html",
+    )
+
+
+@only_htmx
+@login_required
+@require_http_methods(["GET"])
+def exchange_rates_list(request):
+    exchange_rates = ExchangeRate.objects.all().order_by("-date")
+    return render(
+        request,
+        "exchange_rates/fragments/list.html",
+        {"exchange_rates": exchange_rates},
+    )
+
+
+@only_htmx
+@login_required
+@require_http_methods(["GET", "POST"])
+def exchange_rate_add(request):
+    if request.method == "POST":
+        form = ExchangeRateForm(request.POST)
+        if form.is_valid():
+            form.save()
+            messages.success(request, _("Exchange rate added successfully"))
+
+            return HttpResponse(
+                status=204,
+                headers={
+                    "HX-Trigger": "updated, hide_offcanvas, toasts",
+                },
+            )
+    else:
+        form = ExchangeRateForm()
+
+    return render(
+        request,
+        "exchange_rates/fragments/add.html",
+        {"form": form},
+    )
+
+
+@only_htmx
+@login_required
+@require_http_methods(["GET", "POST"])
+def exchange_rate_edit(request, pk):
+    exchange_rate = get_object_or_404(ExchangeRate, id=pk)
+
+    if request.method == "POST":
+        form = ExchangeRateForm(request.POST, instance=exchange_rate)
+        if form.is_valid():
+            form.save()
+            messages.success(request, _("Exchange rate updated successfully"))
+
+            return HttpResponse(
+                status=204,
+                headers={
+                    "HX-Trigger": "updated, hide_offcanvas, toasts",
+                },
+            )
+    else:
+        form = ExchangeRateForm(instance=exchange_rate)
+
+    return render(
+        request,
+        "exchange_rates/fragments/edit.html",
+        {"form": form, "exchange_rate": exchange_rate},
+    )
+
+
+@only_htmx
+@login_required
+@csrf_exempt
+@require_http_methods(["DELETE"])
+def exchange_rate_delete(request, pk):
+    exchange_rate = get_object_or_404(ExchangeRate, id=pk)
+
+    exchange_rate.delete()
+
+    messages.success(request, _("Exchange rate deleted successfully"))
+
+    return HttpResponse(
+        status=204,
+        headers={
+            "HX-Trigger": "updated, hide_offcanvas, toasts",
+        },
+    )