[FIX/BE-US] fix uniformity relation chickin date

internal/modules/production/project_flocks/controllers/projectflock.controller.go

@@ -287,6 +287,11 @@ func (u *ProjectflockController) LookupProjectFlockKandang(c *fiber.Ctx) error {
 	} else {
 		dtoResult.AvailableQuantity = population
 	}
+	if chickinDate, err := u.ProjectflockService.GetProjectFlockKandangChickinDate(c, result.Id); err != nil {
+		return err
+	} else if chickinDate != nil {
+		dtoResult.ChickInDate = chickinDate
+	}
 	if warehouse, werr := u.ProjectflockService.GetWarehouseByKandangID(c, result.KandangId); werr != nil {
 		return werr
 	} else if warehouse != nil {

internal/modules/production/project_flocks/dto/projectflock_kandang.dto.go

@@ -1,6 +1,8 @@
 package dto
 
 import (
+	"time"
+
 	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
 	areaDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/master/areas/dto"
 	fcrDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/master/fcrs/dto"
@@ -38,6 +40,7 @@ type ProjectFlockKandangDTO struct {
 	ProjectFlock          *ProjectFlockWithPivotDTO          `json:"project_flock,omitempty"`
 	AvailableQuantity     float64                            `json:"available_quantity"`
 	Population            *float64                           `json:"population,omitempty"`
+	ChickInDate           *time.Time                         `json:"chick_in_date,omitempty"`
 }
 
 func ToProjectFlockKandangDTO(e entity.ProjectFlockKandang) ProjectFlockKandangDTO {

internal/modules/production/project_flocks/services/projectflock.service.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"strconv"
 	"strings"
+	"time"
 
 	commonRepo "gitlab.com/mbugroup/lti-api.git/internal/common/repository"
 	commonSvc "gitlab.com/mbugroup/lti-api.git/internal/common/service"
@@ -42,6 +43,7 @@ type ProjectflockService interface {
 	DeleteOne(ctx *fiber.Ctx, id uint) error
 	GetProjectFlockKandangByProjectAndKandang(ctx *fiber.Ctx, projectFlockID uint, kandangID uint) (*entity.ProjectFlockKandang, float64, error)
 	GetProjectFlockKandangPopulation(ctx *fiber.Ctx, projectFlockKandangID uint) (float64, error)
+	GetProjectFlockKandangChickinDate(ctx *fiber.Ctx, projectFlockKandangID uint) (*time.Time, error)
 	GetPeriodSummary(ctx *fiber.Ctx, locationID uint) ([]KandangPeriodSummary, error)
 	GetProjectPeriods(ctx *fiber.Ctx, projectIDs []uint) (map[uint]int, error)
 	Approval(ctx *fiber.Ctx, req *validation.Approve) ([]entity.ProjectFlock, error)
@@ -459,6 +461,35 @@ func (s projectflockService) GetProjectFlockKandangPopulation(ctx *fiber.Ctx, pr
 	return total, nil
 }
 
+func (s projectflockService) GetProjectFlockKandangChickinDate(ctx *fiber.Ctx, projectFlockKandangID uint) (*time.Time, error) {
+	if s.PopulationRepo == nil {
+		return nil, fiber.NewError(fiber.StatusInternalServerError, "Project flock population repository is not configured")
+	}
+	if projectFlockKandangID == 0 {
+		return nil, fiber.NewError(fiber.StatusBadRequest, "project_flock_kandang_id is required")
+	}
+
+	populations, err := s.PopulationRepo.GetByProjectFlockKandangID(ctx.Context(), projectFlockKandangID)
+	if err != nil {
+		s.Log.Errorf("Failed to fetch populations for project flock kandang %d: %+v", projectFlockKandangID, err)
+		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock kandang chick in date")
+	}
+
+	var earliest *time.Time
+	for _, pop := range populations {
+		if pop.ProjectChickin == nil || pop.ProjectChickin.ChickInDate.IsZero() {
+			continue
+		}
+		chickinDate := pop.ProjectChickin.ChickInDate
+		if earliest == nil || chickinDate.Before(*earliest) {
+			copy := chickinDate
+			earliest = &copy
+		}
+	}
+
+	return earliest, nil
+}
+
 func (s projectflockService) GetProjectFlockKandangByParams(ctx *fiber.Ctx, idStr string, projectFlockIdStr string, kandangIdStr string) (*entity.ProjectFlockKandang, float64, error) {
 	idStr = strings.TrimSpace(idStr)
 	projectFlockIdStr = strings.TrimSpace(projectFlockIdStr)