import - quota dashboard & some changes in product quota stat

apps/product/services/quota_dashboard_service.py

@@ -0,0 +1,50 @@
+from django.db.models import Sum, Count
+from django.db.models.functions import Coalesce
+
+from apps.authentication.models import Organization
+from apps.authentication.services.service import get_all_org_child
+from apps.core.services.filter.search import DynamicSearchService
+from apps.product.models import OrganizationQuotaStats
+
+
+class QuotaDashboardService:
+    """
+    dashboard of quota information
+    """
+
+    @staticmethod
+    def get_dashboard(self, org: Organization, start_date: str = None, end_date: str = None,
+                      search_fields: list[str] = None):
+        orgs_child = get_all_org_child(org=org)
+        orgs_child.append(org)
+
+        if org.type.key == 'ADM':
+            org_quota_stats = OrganizationQuotaStats.objects.all()
+        else:
+            org_quota_stats = OrganizationQuotaStats.objects.filter(
+                organization__in=orgs_child
+            )
+
+        # filter queryset (transactions & items) by date
+        if start_date and end_date:
+            org_quota_stats = DynamicSearchService(
+                queryset=org_quota_stats,
+                start=start_date,
+                end=end_date,
+                date_field="create_date",
+                search_fields=search_fields
+            ).apply()
+
+        org_quota_stats = org_quota_stats.aggregate(
+            total_quotas=Count("quota", distinct=True),
+            total_distributed=Coalesce(Sum("total_distributed", ), 0),
+            remaining_amount=Coalesce(Sum("remaining_amount", ), 0),
+            inventory_received=Coalesce(Sum("inventory_received", ), 0),
+            sold_amount=Coalesce(Sum("sold_amount", ), 0),
+            total_amount=Coalesce(Sum("total_amount", ), 0),
+            inventory_entry_balance=Coalesce(Sum("inventory_entry_balance", ), 0),
+        )
+
+        return {
+            "quotas_summary": org_quota_stats,
+        }