add & fix - transaction dashboard / edit distribution with stat validation bug

2025-11-26 09:52:14 +03:30
parent 552813edd5
commit d63aa36a19
7 changed files with 209 additions and 8 deletions
--- a/apps/warehouse/services/transaction_dashboard_service.py
+++ b/apps/warehouse/services/transaction_dashboard_service.py
@@ -0,0 +1,92 @@
+from collections import defaultdict
+
+from django.db.models import Sum, Count, Case, When, Q, Value
+from django.db.models.functions import Coalesce
+
+from apps.warehouse.models import InventoryQuotaSaleTransaction, InventoryQuotaSaleItem
+
+
+class TransactionDashboardService:
+
+    @staticmethod
+    def get_dashboard(org):
+        transactions = InventoryQuotaSaleTransaction.objects.filter(
+            seller_organization=org
+        )
+
+        transaction_stats = transactions.aggregate(
+            total_transactions=Count("id"),
+            success_transactions=Count("id", filter=Q(transaction_status="success")),
+            failed_transactions=Count("id", filter=Q(transaction_status="failed")),
+            waiting_transactions=Count("id", filter=Q(transaction_status="waiting")),
+            total_amount=Coalesce(Sum("price_paid"), 0),
+            total_weight=Coalesce(Sum("weight"), 0),
+            unique_ranchers=Count("rancher", distinct=True),
+        )
+
+        items = InventoryQuotaSaleItem.objects.filter(
+            transaction__seller_organization=org
+        ).select_related("gov_product", "free_product")
+
+        products_stats = items.values(
+            product_id=Case(
+                When(gov_product__isnull=False, then="gov_product_id"),
+                When(free_product__isnull=False, then="free_product_id"),
+            ),
+            product_name=Case(
+                When(gov_product__isnull=False, then="gov_product__name"),
+                When(free_product__isnull=False, then="free_product__product__name"),
+            ),
+            product_type=Case(
+                When(gov_product__isnull=False, then=Value("gov")),
+                When(free_product__isnull=False, then=Value("free")),
+            )
+        ).annotate(
+            total_sales=Count("id"),
+            total_weight=Coalesce(Sum("weight"), 0),
+            # total_price=Coalesce(Sum("total_price"), 0),
+            # avg_unit_price=Coalesce(Sum("total_price") / Sum("weight"), 0),
+            success_sales=Count("id", filter=Q(transaction__transaction_status="success")),
+            failed_sales=Count("id", filter=Q(transaction__transaction_status="failed")),
+            waiting_sales=Count("id", filter=Q(transaction__transaction_status="waiting")),
+            card_payments=Count("id", filter=Q(transaction__price_type="card")),
+            cash_payments=Count("id", filter=Q(transaction__price_type="cash")),
+            check_payments=Count("id", filter=Q(transaction__price_type="check")),
+            credit_payments=Count("id", filter=Q(transaction__price_type="credit")),
+            extra_items=Count("id", filter=Q(is_extra=True)),
+            pre_sale_items=Count("id", filter=Q(is_pre_sale=True)),
+        ).order_by("-total_sales")
+
+        # calculate sum of item share percentage by product
+        items_by_product = defaultdict(list)
+
+        for item in items:
+            pid = item.gov_product_id or item.free_product_id
+            items_by_product[pid].append(item)
+
+        for product in products_stats:
+            pid = product["product_id"]
+            share_totals = defaultdict(lambda: {"total_price": 0, "count": 0})
+
+            for item in items_by_product.get(pid, []):
+                if item.item_share:
+                    for share in item.item_share:
+                        # share: {"name": ..., "price": ..., "shaba": ...}
+                        name = share.get("name")
+                        price = share.get("price", 0)
+
+                        share_totals[name]["total_price"] += price
+                        share_totals[name]["count"] += 1
+
+            product["item_share_stats"] = sorted(
+                [
+                    {"name": name, **val}
+                    for name, val in share_totals.items()
+                ],
+                key=lambda x: -x["total_price"]
+            )
+
+        return {
+            "transaction_summary": transaction_stats,
+            "product_summary": list(products_stats),
+        }