fix: 机器文件下载问题修复&dbm重构

server/internal/db/dbm/dbi/db_program.go

@@ -0,0 +1,36 @@
+package dbi
+
+import (
+	"context"
+	"mayfly-go/internal/db/domain/entity"
+	"path/filepath"
+	"time"
+)
+
+type DbProgram interface {
+	Backup(ctx context.Context, backupHistory *entity.DbBackupHistory) (*entity.BinlogInfo, error)
+
+	FetchBinlogs(ctx context.Context, downloadLatestBinlogFile bool, earliestBackupSequence, latestBinlogSequence int64) ([]*entity.BinlogFile, error)
+
+	ReplayBinlog(ctx context.Context, originalDatabase, targetDatabase string, restoreInfo *RestoreInfo) error
+
+	RestoreBackupHistory(ctx context.Context, dbName string, dbBackupId uint64, dbBackupHistoryUuid string) error
+
+	GetBinlogEventPositionAtOrAfterTime(ctx context.Context, binlogName string, targetTime time.Time) (position int64, parseErr error)
+}
+
+type RestoreInfo struct {
+	BackupHistory   *entity.DbBackupHistory
+	BinlogHistories []*entity.DbBinlogHistory
+	StartPosition   int64
+	TargetPosition  int64
+	TargetTime      time.Time
+}
+
+func (ri *RestoreInfo) GetBinlogPaths(binlogDir string) []string {
+	files := make([]string, 0, len(ri.BinlogHistories))
+	for _, history := range ri.BinlogHistories {
+		files = append(files, filepath.Join(binlogDir, history.FileName))
+	}
+	return files
+}