add: add new statistcs api

core/apps/finance/migrations/0021_incomecontract_paid_price.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.4 on 2025-09-13 16:23
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('finance', '0020_expencecontract_incomecontract'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='incomecontract',
+            name='paid_price',
+            field=models.PositiveBigIntegerField(blank=True, default=0, null=True),
+        ),
+    ]

core/apps/finance/migrations/0022_expencecontract_paid_price.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.4 on 2025-09-13 17:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('finance', '0021_incomecontract_paid_price'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='expencecontract',
+            name='paid_price',
+            field=models.PositiveBigIntegerField(blank=True, default=0, null=True),
+        ),
+    ]

core/apps/finance/models/expence_contract.py

@@ -23,6 +23,7 @@ class ExpenceContract(BaseModel):
 
     price = models.PositiveBigIntegerField()
     currency = models.CharField(max_length=3, choices=[('uzs', 'uzs'), ('usd', 'usd')])
+    paid_price = models.PositiveBigIntegerField(default=0, null=True, blank=True)
     date = models.DateField()
     comment = models.TextField(null=True, blank=True)
 

core/apps/finance/models/income_contract.py

@@ -23,6 +23,7 @@ class IncomeContract(BaseModel):
 
     price = models.PositiveBigIntegerField()
     currency = models.CharField(max_length=3, choices=[('uzs', 'uzs'), ('usd', 'usd')])
+    paid_price = models.PositiveBigIntegerField(default=0, null=True, blank=True)    
     date = models.DateField()
     comment = models.TextField(null=True, blank=True)
 

core/apps/finance/urls.py

@@ -71,12 +71,14 @@ urlpatterns = [
         [
             path('list/', ic_views.IncomeContractListApiView.as_view()),
             path('create/', ic_views.IncomeContractCreateApiView.as_view()),
+            path('statistics/', ic_views.IncomeContractStatisticsApiView.as_view()),
         ]
     )),
     path('expence_contract/', include(
         [
             path('list/', ec_views.ExpenceContractListApiView.as_view()),
             path('create/', ec_views.ExpenceContractCreateApiView.as_view()),
+            path('statistics/', ec_views.ExpenceContractStatisticsApiView.as_view()),
         ]
     ))
 ]

core/apps/finance/views/expence_contract.py

@@ -1,3 +1,6 @@
+from django.utils.timezone import now
+from django.db.models import Sum, Q, F
+
 from rest_framework import generics, views 
 from rest_framework.response import Response
 
@@ -44,3 +47,44 @@ class ExpenceContractListApiView(generics.GenericAPIView):
         if page is not None:
             serializer = self.serializer_class(page, many=True)
             return self.get_paginated_response(serializer.data)
+        
+
+class ExpenceContractStatisticsApiView(views.APIView):
+    permission_classes = [HasRolePermission]
+    
+    def get(self, request):
+        counterparty_id = request.query_params.get('counterparty')
+        if counterparty_id:
+            queryset = ExpenceContract.objects.filter(counterparty=counterparty_id)
+        else:
+            queryset = ExpenceContract.objects.all()
+        today = now().date()
+        usd = queryset.aggregate(
+            plan_payments=Sum('price', filter=Q(currency='usd')),
+            pending_payments=Sum(
+                'price',
+                filter=Q(date__gte=today) & Q(paid_price__isnull=True) & Q(currency='usd')
+            ),
+            paid_payments=Sum('paid_price', filter=Q(currency='usd')),
+            overdue_payments=Sum(
+                'price',
+                filter=Q(date__lt=today) & Q(paid_price__lt=F('price')) & Q(currency='usd')
+            )
+        )
+        uzs = queryset.aggregate(
+            plan_payments=Sum('price', filter=Q(currency='uzs')),
+            pending_payments=Sum(
+                'price',
+                filter=Q(date__gte=today) & Q(paid_price__isnull=True) & Q(currency='uzs')
+            ),
+            paid_payments=Sum('paid_price', filter=Q(currency='uzs')),
+            overdue_payments=Sum(
+                'price',
+                filter=Q(date__lt=today) & Q(paid_price__lt=F('price')) & Q(currency='uzs')
+            )
+        )
+        res = {
+            'uzs': uzs,
+            'usd': usd
+        }
+        return Response(res, status=200)

core/apps/finance/views/income_contract.py

@@ -1,6 +1,8 @@
 from django.shortcuts import get_object_or_404
+from django.db.models import Sum, Q, F
+from django.utils.timezone import now
 
-from rest_framework import generics
+from rest_framework import generics, views
 from rest_framework.response import Response
 
 from core.apps.accounts.permissions.permissions import HasRolePermission
@@ -46,3 +48,44 @@ class IncomeContractListApiView(generics.GenericAPIView):
         if page is not None:
             serializer = self.serializer_class(page, many=True)
             return self.get_paginated_response(serializer.data)
+
+
+class IncomeContractStatisticsApiView(views.APIView):
+    permission_classes = [HasRolePermission]
+    
+    def get(self, request):
+        counterparty_id = request.query_params.get('counterparty')
+        if counterparty_id:
+            queryset = IncomeContract.objects.filter(counterparty=counterparty_id)
+        else:
+            queryset = IncomeContract.objects.all()
+        today = now().date()
+        usd = queryset.aggregate(
+            plan_payments=Sum('price', filter=Q(currency='usd')),
+            pending_payments=Sum(
+                'price',
+                filter=Q(date__gte=today) & Q(paid_price__isnull=True) & Q(currency='usd')
+            ),
+            paid_payments=Sum('paid_price', filter=Q(currency='usd')),
+            overdue_payments=Sum(
+                'price',
+                filter=Q(date__lt=today) & Q(paid_price__lt=F('price')) & Q(currency='usd')
+            )
+        )
+        uzs = queryset.aggregate(
+            plan_payments=Sum('price', filter=Q(currency='uzs')),
+            pending_payments=Sum(
+                'price',
+                filter=Q(date__gte=today) & Q(paid_price__isnull=True) & Q(currency='uzs')
+            ),
+            paid_payments=Sum('paid_price', filter=Q(currency='uzs')),
+            overdue_payments=Sum(
+                'price',
+                filter=Q(date__lt=today) & Q(paid_price__lt=F('price')) & Q(currency='uzs')
+            )
+        )
+        res = {
+            'uzs': uzs,
+            'usd': usd
+        }
+        return Response(res, status=200)