Feat(BE-339): make a report for purchasing supplier

internal/modules/repports/services/repport.service.go

@@ -2,6 +2,7 @@ package service
 
 import (
 	"gitlab.com/mbugroup/lti-api.git/internal/modules/repports/dto"
+	repportRepo "gitlab.com/mbugroup/lti-api.git/internal/modules/repports/repositories"
 	validation "gitlab.com/mbugroup/lti-api.git/internal/modules/repports/validations"
 	"gitlab.com/mbugroup/lti-api.git/internal/utils"
 
@@ -10,6 +11,8 @@ import (
 	expenseRepo "gitlab.com/mbugroup/lti-api.git/internal/modules/expenses/repositories"
 	marketingRepo "gitlab.com/mbugroup/lti-api.git/internal/modules/marketing/repositories"
 
+	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
+
 	"github.com/go-playground/validator/v10"
 	"github.com/gofiber/fiber/v2"
 	"github.com/sirupsen/logrus"
@@ -19,6 +22,7 @@ import (
 type RepportService interface {
 	GetExpense(ctx *fiber.Ctx, params *validation.ExpenseQuery) ([]dto.RepportExpenseListDTO, int64, error)
 	GetMarketing(ctx *fiber.Ctx, params *validation.MarketingQuery) ([]dto.RepportMarketingListDTO, int64, error)
+	GetPurchaseSupplier(ctx *fiber.Ctx, params *validation.PurchaseSupplierQuery) ([]dto.PurchaseSupplierDTO, int64, error)
 }
 
 type repportService struct {
@@ -27,15 +31,23 @@ type repportService struct {
 	ExpenseRealizationRepo expenseRepo.ExpenseRealizationRepository
 	MarketingDeliveryRepo  marketingRepo.MarketingDeliveryProductRepository
 	ApprovalSvc            approvalService.ApprovalService
+	PurchaseSupplierRepo   repportRepo.PurchaseSupplierRepository
 }
 
-func NewRepportService(validate *validator.Validate, expenseRealizationRepo expenseRepo.ExpenseRealizationRepository, marketingDeliveryRepo marketingRepo.MarketingDeliveryProductRepository, approvalSvc approvalService.ApprovalService) RepportService {
+func NewRepportService(
+	validate *validator.Validate,
+	expenseRealizationRepo expenseRepo.ExpenseRealizationRepository,
+	marketingDeliveryRepo marketingRepo.MarketingDeliveryProductRepository,
+	approvalSvc approvalService.ApprovalService,
+	purchaseSupplierRepo repportRepo.PurchaseSupplierRepository,
+) RepportService {
 	return &repportService{
 		Log:                    utils.Log,
 		Validate:               validate,
 		ExpenseRealizationRepo: expenseRealizationRepo,
 		MarketingDeliveryRepo:  marketingDeliveryRepo,
 		ApprovalSvc:            approvalSvc,
+		PurchaseSupplierRepo:   purchaseSupplierRepo,
 	}
 }
 
@@ -113,3 +125,58 @@ func (s *repportService) GetMarketing(c *fiber.Ctx, params *validation.Marketing
 
 	return dto.ToRepportMarketingListDTOs(deliveryProducts), total, nil
 }
+
+func (s *repportService) GetPurchaseSupplier(c *fiber.Ctx, params *validation.PurchaseSupplierQuery) ([]dto.PurchaseSupplierDTO, int64, error) {
+	if err := s.Validate.Struct(params); err != nil {
+		return nil, 0, err
+	}
+
+	offset := (params.Page - 1) * params.Limit
+	if offset < 0 {
+		offset = 0
+	}
+
+	suppliers, totalSuppliers, err := s.PurchaseSupplierRepo.GetSuppliersWithPurchases(c.Context(), offset, params.Limit, params)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	if totalSuppliers == 0 || len(suppliers) == 0 {
+		return []dto.PurchaseSupplierDTO{}, totalSuppliers, nil
+	}
+
+	supplierMap := make(map[uint]entity.Supplier, len(suppliers))
+	supplierIDs := make([]uint, 0, len(suppliers))
+	for _, supplier := range suppliers {
+		supplierMap[supplier.Id] = supplier
+		supplierIDs = append(supplierIDs, supplier.Id)
+	}
+
+	items, err := s.PurchaseSupplierRepo.GetItemsBySuppliers(c.Context(), supplierIDs, params)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	itemsBySupplier := make(map[uint][]entity.PurchaseItem)
+	for _, item := range items {
+		if item.Purchase == nil {
+			continue
+		}
+		supplierID := item.Purchase.SupplierId
+		itemsBySupplier[supplierID] = append(itemsBySupplier[supplierID], item)
+	}
+
+	result := make([]dto.PurchaseSupplierDTO, 0, len(supplierIDs))
+	for _, supplierID := range supplierIDs {
+		supplier, exists := supplierMap[supplierID]
+		if !exists {
+			continue
+		}
+
+		supplierItems := itemsBySupplier[supplierID]
+		dtoItem := dto.ToPurchaseSupplierDTO(supplier, supplierItems)
+		result = append(result, dtoItem)
+	}
+
+	return result, totalSuppliers, nil
+}