feat: implement initial GoDump backup service with management web UI and MySQL support

backup/discover.go

@@ -0,0 +1,50 @@
+package backup
+
+import (
+	"database/sql"
+	"fmt"
+
+	"godump/config"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+func discoverDatabases(cfg config.InstanceConfig) ([]string, error) {
+	dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/?parseTime=true", cfg.User, cfg.Password, cfg.Host, cfg.Port)
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		return nil, err
+	}
+	defer db.Close()
+
+	// Ensure the connection is actually valid
+	if err := db.Ping(); err != nil {
+		return nil, err
+	}
+
+	query := `
+		SELECT SCHEMA_NAME 
+		FROM INFORMATION_SCHEMA.SCHEMATA 
+		WHERE SCHEMA_NAME NOT IN ('information_schema', 'performance_schema', 'mysql', 'sys')
+	`
+	rows, err := db.Query(query)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var databases []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		databases = append(databases, name)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return databases, nil
+}