feat: implement system statistics tracking, commit management controllers, and associated database migrations

internal/services/statisticService.go

@@ -0,0 +1,75 @@
+package services
+
+import (
+	"context"
+	"history-api/internal/dtos/request"
+	"history-api/internal/dtos/response"
+	"history-api/internal/gen/sqlc"
+	"history-api/internal/repositories"
+	"time"
+
+	"github.com/gofiber/fiber/v3"
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+type StatisticService interface {
+	Search(ctx context.Context, dto *request.SearchStatisticDto) ([]*response.StatisticResponse, *fiber.Error)
+	GetByDate(ctx context.Context, dateStr string) (*response.StatisticResponse, *fiber.Error)
+}
+
+type statisticService struct {
+	repo repositories.StatisticRepository
+}
+
+func NewStatisticService(repo repositories.StatisticRepository) StatisticService {
+	return &statisticService{repo: repo}
+}
+
+func (s *statisticService) Search(ctx context.Context, dto *request.SearchStatisticDto) ([]*response.StatisticResponse, *fiber.Error) {
+	params := sqlc.SearchSystemStatisticsParams{}
+
+	if dto.StartDate != "" {
+		parsedDate, err := time.Parse("2006-01-02", dto.StartDate)
+		if err != nil {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid start_date format, expected YYYY-MM-DD")
+		}
+		params.StartDate = pgtype.Date{Time: parsedDate, Valid: true}
+	}
+
+	if dto.EndDate != "" {
+		parsedDate, err := time.Parse("2006-01-02", dto.EndDate)
+		if err != nil {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid end_date format, expected YYYY-MM-DD")
+		}
+		params.EndDate = pgtype.Date{Time: parsedDate, Valid: true}
+	}
+
+	stats, err := s.repo.Search(ctx, params)
+	if err != nil {
+		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to search statistics")
+	}
+
+	responses := make([]*response.StatisticResponse, 0, len(stats))
+	for _, stat := range stats {
+		responses = append(responses, stat.ToResponse())
+	}
+
+	return responses, nil
+}
+
+func (s *statisticService) GetByDate(ctx context.Context, dateStr string) (*response.StatisticResponse, *fiber.Error) {
+	parsedDate, err := time.Parse("2006-01-02", dateStr)
+	if err != nil {
+		return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid date format, expected YYYY-MM-DD")
+	}
+
+	stat, err := s.repo.GetByDate(ctx, parsedDate)
+	if err != nil {
+		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to get statistics")
+	}
+	if stat == nil {
+		return nil, fiber.NewError(fiber.StatusNotFound, "Statistics not found for the given date")
+	}
+
+	return stat.ToResponse(), nil
+}