feat: Implement configuration and job duplication functionality

- Added duplication feature for configurations and jobs, allowing users to create copies of existing entries.
- Introduced new buttons in the UI for duplicating configurations and jobs, enhancing user experience.
- Implemented backend logic to handle duplication requests, ensuring proper ownership checks and data integrity.
- Added notifications for successful duplication actions to inform users of the outcome.
- Updated relevant templates and handlers to support the new duplication functionality.

internal/db/migrations/001_initial_schema.go

@@ -2,6 +2,9 @@ package migrations
 
 import (
 	"fmt"
+	"os"
+	"path/filepath"
+	"time"
 
 	"github.com/go-gormigrate/gormigrate/v2"
 	"gorm.io/gorm"
@@ -11,6 +14,60 @@ func InitialSchema() *gormigrate.Migration {
 	return &gormigrate.Migration{
 		ID: "001_initial_schema",
 		Migrate: func(tx *gorm.DB) error {
+			// Check if any tables exist (indicating an existing database)
+			var count int64
+			if err := tx.Raw("SELECT count(*) FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'").Scan(&count).Error; err != nil {
+				return fmt.Errorf("failed to check for existing tables: %v", err)
+			}
+
+			// If tables exist, create a backup
+			if count > 0 {
+				// Get the database path
+				sqlDB, err := tx.DB()
+				if err != nil {
+					return fmt.Errorf("failed to get underlying database: %v", err)
+				}
+
+				var seq int
+				var name, dbPath string
+				if err := sqlDB.QueryRow("PRAGMA database_list").Scan(&seq, &name, &dbPath); err != nil {
+					return fmt.Errorf("failed to get database path: %v", err)
+				}
+
+				// Get backup directory from environment variable or use default
+				backupDir := os.Getenv("BACKUP_DIR")
+				if backupDir == "" {
+					backupDir = "/app/backups" // Default Docker path
+					// Check if we're not in Docker
+					if _, err := os.Stat(backupDir); os.IsNotExist(err) {
+						backupDir = "backups" // Fallback to local directory
+					}
+				}
+
+				// Create backup directory if it doesn't exist
+				if err := os.MkdirAll(backupDir, 0755); err != nil {
+					return fmt.Errorf("failed to create backup directory: %v", err)
+				}
+
+				// Create backup file with timestamp in the backup directory
+				dbFileName := filepath.Base(dbPath)
+				backupFileName := fmt.Sprintf("%s.backup.%s", dbFileName, time.Now().Format("20060102_150405"))
+				backupFile := filepath.Join(backupDir, backupFileName)
+
+				// Read original database
+				data, err := os.ReadFile(dbPath)
+				if err != nil {
+					return fmt.Errorf("failed to read database for backup: %v", err)
+				}
+
+				// Write backup
+				if err := os.WriteFile(backupFile, data, 0600); err != nil {
+					return fmt.Errorf("failed to create database backup: %v", err)
+				}
+
+				fmt.Printf("Created database backup at: %s\n", backupFile)
+			}
+
 			// Disable foreign key constraints while creating tables
 			if err := tx.Exec("PRAGMA foreign_keys = OFF").Error; err != nil {
 				return fmt.Errorf("failed to disable foreign key constraints: %v", err)