chore: update session and challenge repo -- using Redis for caching session and challenge verifying -- added api handler docs

internal/app/app.go

@@ -2,7 +2,13 @@ package app
 
 import (
 	"backend/config"
+	"backend/internal/repository/cache"
+	"backend/internal/repository/storage"
 	"backend/internal/usecase"
+	cachePackage "backend/pkg/cache"
+	"backend/pkg/postgres"
+	"fmt"
+	"log"
 
 	"gorm.io/gorm"
 )
@@ -10,5 +16,64 @@ import (
 type AppContainer struct {
 	cfg         config.Config
 	dbConn      *gorm.DB
+	redis       *cachePackage.Redis
 	authService usecase.AuthService
 }
+
+func NewAppContainer(cfg config.Config) (*AppContainer, error) {
+	dbOptions := postgres.DBConnOptions{
+		User:   cfg.DB.User,
+		Pass:   cfg.DB.Pass,
+		Host:   cfg.DB.Host,
+		Port:   uint(cfg.DB.Port),
+		DBName: cfg.DB.DBName,
+	}
+	dbConn, err := postgres.NewPsqlGormConnection(dbOptions)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to database: %w", err)
+	}
+
+	redis, err := cachePackage.NewRedis(cfg.Redis)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to Redis: %w", err)
+	}
+
+	userRepo := storage.NewUserRepository(dbConn)
+	sessionRepo := cache.NewSessionRepository(redis)
+	challengeRepo := cache.NewChallengeRepository(redis)
+
+	authService := usecase.NewAuthService(
+		userRepo,
+		sessionRepo,
+		challengeRepo,
+		30,
+		cfg.JWT,
+	)
+
+	return &AppContainer{
+		cfg:         cfg,
+		dbConn:      dbConn,
+		redis:       redis,
+		authService: authService,
+	}, nil
+}
+
+func (app *AppContainer) AuthService() usecase.AuthService {
+	return app.authService
+}
+
+func (app *AppContainer) Close() {
+	if app.redis != nil {
+		if err := app.redis.Close(); err != nil {
+			log.Printf("Error closing Redis connection: %v", err)
+		}
+	}
+
+	if app.dbConn != nil {
+		if sqlDB, err := app.dbConn.DB(); err == nil {
+			if err := sqlDB.Close(); err != nil {
+				log.Printf("Error closing database connection: %v", err)
+			}
+		}
+	}
+}