feat: add bep year and total lcc to chart API

src/plant_transaction_data/router.py

@@ -5,6 +5,7 @@ from .model import PlantTransactionData
 from .schema import (
     PlantTransactionDataPagination,
     PlantTransactionDataRead,
+    PlantChartData,
     PlantTransactionChart,
     PlantTransactionDataCreate,
     PlantTransactionDataUpdate,
@@ -40,15 +41,24 @@ async def get_transaction_datas(
     )
 
 
-@router.get("/charts", response_model=StandardResponse[List[PlantTransactionChart]])
+@router.get("/charts", response_model=StandardResponse[PlantChartData])
 async def get_chart_data(db_session: DbSession, common: CommonParameters):
-    chart_data = await get_charts(db_session=db_session, common=common)
-    if not chart_data:
+    chart_data, bep_year, bep_total_lcc = await get_charts(
+        db_session=db_session, common=common
+    )
+    if not chart_data or not bep_year:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
             detail="A data with this id does not exist.",
         )
-    return StandardResponse(data=chart_data, message="Data retrieved successfully")
+    return StandardResponse(
+        data={
+            "items": chart_data,
+            "bep_year": bep_year,
+            "bep_total_lcc": bep_total_lcc,
+        },
+        message="Data retrieved successfully",
+    )
 
 
 @router.get(

src/plant_transaction_data/schema.py

@@ -107,6 +107,12 @@ class PlantTransactionChart(DefaultBase):
     fs_chart_capex_annualized: Optional[float] = Field(None, nullable=True)
 
 
+class PlantChartData(DefaultBase):
+    items: List[PlantTransactionChart]
+    bep_year: Optional[int] = Field(int, nullable=True)
+    bep_total_lcc: Optional[float] = Field(float, nullable=True)
+
+
 class PlantTransactionDataCreate(PlantTransactionDataBase):
     pass
 

src/plant_transaction_data/service.py

@@ -56,7 +56,32 @@ async def get_charts(
     query = Select(PlantTransactionData).order_by(PlantTransactionData.tahun.asc())
     results = await db_session.execute(query)
 
-    return results.scalars().all()
+    chart_data = results.scalars().all()
+    bep_year = None
+    previous_total_cost = 0
+    previous_revenue = 0
+    bep_total_lcc = 0
+
+    for item in chart_data:
+        total_cost = (
+            item.chart_capex_annualized
+            + item.chart_oem_annualized
+            + item.chart_fuel_cost_annualized
+        )
+        revenue = item.chart_revenue_annualized
+
+        if previous_total_cost and previous_revenue:
+            if (previous_total_cost > previous_revenue and total_cost < revenue) or (
+                previous_total_cost < previous_revenue and total_cost > revenue
+            ):
+                bep_total_lcc = total_cost
+                bep_year = item.tahun
+                break
+
+        previous_total_cost = total_cost
+        previous_revenue = revenue
+
+    return chart_data, bep_year, bep_total_lcc
 
 
 async def create(