Enhance tender service to exclude company-rejected tenders from recommendations

- Updated the tender service to include a new dependency for listing rejected tenders by company, allowing for more refined tender recommendations.
- Introduced a new field in the SearchForm to specify whether to exclude rejected tenders from the recommendation results.
- Enhanced the Recommend method to filter out rejected tenders based on the new exclusion logic, improving the relevance of AI-ranked tender recommendations.
- Added unit tests to verify the exclusion logic for rejected tenders, ensuring robust functionality.

This update improves the tender recommendation process by ensuring that company-rejected tenders are not included in the results, enhancing user experience and satisfaction.

internal/tender/service.go

@@ -80,13 +80,14 @@ type Service interface {
 
 // tenderService implements TenderService interface
 type tenderService struct {
-	repository          TenderRepository
-	companyService      company.Service
-	customerService     customer.Service
-	logger              logger.Logger
-	aiSummarizerClient  AISummarizerClient
-	aiSummarizerStorage AISummarizerStorage
-	defaultLanguage     string
+	repository           TenderRepository
+	companyService       company.Service
+	customerService      customer.Service
+	rejectedTenderLister CompanyRejectedTenderLister
+	logger               logger.Logger
+	aiSummarizerClient   AISummarizerClient
+	aiSummarizerStorage  AISummarizerStorage
+	defaultLanguage      string
 }
 
 const (
@@ -100,19 +101,29 @@ var (
 )
 
 // NewService creates a new tender service
-func NewService(repository TenderRepository, companyService company.Service, customerService customer.Service, logger logger.Logger, aiClient AISummarizerClient, aiStorage AISummarizerStorage, defaultLanguage string) Service {
+func NewService(
+	repository TenderRepository,
+	companyService company.Service,
+	customerService customer.Service,
+	rejectedTenderLister CompanyRejectedTenderLister,
+	logger logger.Logger,
+	aiClient AISummarizerClient,
+	aiStorage AISummarizerStorage,
+	defaultLanguage string,
+) Service {
 	if strings.TrimSpace(defaultLanguage) == "" {
 		defaultLanguage = "en"
 	}
 
 	return &tenderService{
-		repository:          repository,
-		companyService:      companyService,
-		customerService:     customerService,
-		logger:              logger,
-		aiSummarizerClient:  aiClient,
-		aiSummarizerStorage: aiStorage,
-		defaultLanguage:     strings.ToLower(defaultLanguage),
+		repository:           repository,
+		companyService:       companyService,
+		customerService:      customerService,
+		rejectedTenderLister: rejectedTenderLister,
+		logger:               logger,
+		aiSummarizerClient:   aiClient,
+		aiSummarizerStorage:  aiStorage,
+		defaultLanguage:      strings.ToLower(defaultLanguage),
 	}
 }
 
@@ -946,6 +957,18 @@ func (s *tenderService) Recommend(ctx context.Context, form *SearchForm, paginat
 		return nil, err
 	}
 
+	var excluded map[string]struct{}
+	if form.ExcludeRejectedTenders {
+		excluded, err = s.buildRejectedTenderIDSet(ctx, companyID)
+		if err != nil {
+			s.logger.Error("Failed to build recommendation exclusions", map[string]interface{}{
+				"company_id": companyID,
+				"error":      err.Error(),
+			})
+			return nil, fmt.Errorf("failed to build recommendation exclusions: %w", err)
+		}
+	}
+
 	lang := s.pickResponseLanguage(form.Language)
 	now := time.Now().Unix()
 	ordered := make([]TenderResponse, 0, len(recommendations))
@@ -955,6 +978,9 @@ func (s *tenderService) Recommend(ctx context.Context, form *SearchForm, paginat
 		if !ok {
 			continue
 		}
+		if isRecommendedTenderExcluded(tender, tenderRef, excluded) {
+			continue
+		}
 		if form.OnlyActiveDeadlines && !tender.IsRecommendable(now) {
 			continue
 		}