mirror of
https://github.com/Awuqing/BackupX.git
synced 2026-08-31 13:07:36 +08:00
319 lines
11 KiB
Go
319 lines
11 KiB
Go
package service
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"time"
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"backupx/server/internal/apperror"
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"backupx/server/internal/model"
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"backupx/server/internal/repository"
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)
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// TaskExportService 管理备份任务的 JSON 导入 / 导出。
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// 用途：
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// 1. 集群迁移（旧 Master → 新 Master 的任务配置搬迁）
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// 2. 灾备恢复（任务配置本地文件化，Master 宕机后重建）
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// 3. 配置审计（版本化 Git 管理 JSON 快照）
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//
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// 出于安全考虑，导出/导入不包含任何敏感字段：
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// - 数据库密码（DBPasswordCiphertext）：跳过，导入后需人工填补
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// - 存储目标具体配置：仅按 name 匹配现有目标，不搬运密钥
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// - Node 绑定：按 name 匹配现有节点，不存在时退化为 NodeID=0（本机）
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type TaskExportService struct {
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tasks *BackupTaskService
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taskRepo repository.BackupTaskRepository
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targets repository.StorageTargetRepository
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nodes repository.NodeRepository
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}
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func NewTaskExportService(
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tasks *BackupTaskService,
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taskRepo repository.BackupTaskRepository,
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targets repository.StorageTargetRepository,
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nodes repository.NodeRepository,
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) *TaskExportService {
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return &TaskExportService{tasks: tasks, taskRepo: taskRepo, targets: targets, nodes: nodes}
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}
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// ExportedTask 导出格式：按名称引用存储/节点，不含敏感数据。
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type ExportedTask struct {
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Name string `json:"name"`
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Type string `json:"type"`
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Enabled bool `json:"enabled"`
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CronExpr string `json:"cronExpr,omitempty"`
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SourcePath string `json:"sourcePath,omitempty"`
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SourcePaths []string `json:"sourcePaths,omitempty"`
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ExcludePatterns []string `json:"excludePatterns,omitempty"`
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DBHost string `json:"dbHost,omitempty"`
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DBPort int `json:"dbPort,omitempty"`
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DBUser string `json:"dbUser,omitempty"`
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DBName string `json:"dbName,omitempty"`
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DBPath string `json:"dbPath,omitempty"`
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ExtraConfig map[string]any `json:"extraConfig,omitempty"`
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// 按名称引用：导入时按名称查找对应 ID
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StorageTargetNames []string `json:"storageTargetNames"`
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ReplicationTargetNames []string `json:"replicationTargetNames,omitempty"`
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NodeName string `json:"nodeName,omitempty"`
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DependsOnTaskNames []string `json:"dependsOnTaskNames,omitempty"`
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Tags string `json:"tags,omitempty"`
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Compression string `json:"compression,omitempty"`
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Encrypt bool `json:"encrypt,omitempty"`
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RetentionDays int `json:"retentionDays,omitempty"`
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MaxBackups int `json:"maxBackups,omitempty"`
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VerifyEnabled bool `json:"verifyEnabled,omitempty"`
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VerifyCronExpr string `json:"verifyCronExpr,omitempty"`
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VerifyMode string `json:"verifyMode,omitempty"`
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SLAHoursRPO int `json:"slaHoursRpo,omitempty"`
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AlertOnConsecutiveFails int `json:"alertOnConsecutiveFails,omitempty"`
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MaintenanceWindows string `json:"maintenanceWindows,omitempty"`
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}
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// ExportPayload 导出整体结构，带元信息。
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type ExportPayload struct {
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Version string `json:"version"`
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ExportedAt time.Time `json:"exportedAt"`
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TaskCount int `json:"taskCount"`
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Tasks []ExportedTask `json:"tasks"`
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Notice string `json:"notice"`
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}
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// ImportResult 导入单条结果，best-effort。
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type ImportResult struct {
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Name string `json:"name"`
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TaskID uint `json:"taskId,omitempty"`
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Success bool `json:"success"`
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Error string `json:"error,omitempty"`
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Skipped bool `json:"skipped,omitempty"`
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}
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// Export 导出当前全部任务为 JSON。
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// taskIDs 为空则导出全部；否则仅导出指定 ID。
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func (s *TaskExportService) Export(ctx context.Context, taskIDs []uint) (*ExportPayload, error) {
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items, err := s.taskRepo.List(ctx, repository.BackupTaskListOptions{})
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if err != nil {
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return nil, apperror.Internal("TASK_EXPORT_LIST_FAILED", "无法获取任务列表", err)
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}
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targetNames := map[uint]string{}
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if all, err := s.targets.List(ctx); err == nil {
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for _, t := range all {
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targetNames[t.ID] = t.Name
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}
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}
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nodeNames := map[uint]string{}
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if all, err := s.nodes.List(ctx); err == nil {
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for _, n := range all {
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nodeNames[n.ID] = n.Name
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}
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}
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taskNames := map[uint]string{}
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for _, t := range items {
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taskNames[t.ID] = t.Name
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}
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idFilter := map[uint]bool{}
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for _, id := range taskIDs {
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idFilter[id] = true
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}
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exported := make([]ExportedTask, 0, len(items))
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for i := range items {
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item := items[i]
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if len(idFilter) > 0 && !idFilter[item.ID] {
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continue
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}
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et := s.toExported(&item, targetNames, nodeNames, taskNames)
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exported = append(exported, et)
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}
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return &ExportPayload{
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Version: "v1",
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ExportedAt: time.Now().UTC(),
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TaskCount: len(exported),
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Tasks: exported,
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Notice: "敏感字段（数据库密码、存储凭证）已排除，导入后需人工补全。",
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}, nil
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}
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// Import 批量导入任务。best-effort：单条失败不阻断。
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// 冲突策略：任务名重复则跳过（不覆盖）。
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func (s *TaskExportService) Import(ctx context.Context, payload ExportPayload) ([]ImportResult, error) {
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// 预加载所有命名 → ID 映射
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targetsByName := map[string]uint{}
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if all, err := s.targets.List(ctx); err == nil {
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for _, t := range all {
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targetsByName[t.Name] = t.ID
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}
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}
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nodesByName := map[string]uint{}
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if all, err := s.nodes.List(ctx); err == nil {
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for _, n := range all {
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nodesByName[n.Name] = n.ID
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}
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}
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tasksByName := map[string]uint{}
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existing, err := s.taskRepo.List(ctx, repository.BackupTaskListOptions{})
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if err != nil {
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return nil, apperror.Internal("TASK_IMPORT_LIST_FAILED", "无法读取当前任务列表", err)
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}
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for _, t := range existing {
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tasksByName[t.Name] = t.ID
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}
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results := make([]ImportResult, 0, len(payload.Tasks))
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// 两阶段：先创建所有任务（忽略 DependsOn），再更新依赖
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created := map[string]uint{}
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for _, t := range payload.Tasks {
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if t.Name == "" {
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continue
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}
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if _, dup := tasksByName[t.Name]; dup {
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results = append(results, ImportResult{Name: t.Name, Skipped: true, Success: true, Error: "已存在同名任务，跳过"})
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continue
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}
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input := s.toUpsertInput(t, targetsByName, nodesByName, nil)
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detail, err := s.tasks.Create(ctx, input)
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if err != nil {
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results = append(results, ImportResult{Name: t.Name, Success: false, Error: appErrorMessage(err)})
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continue
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}
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created[t.Name] = detail.ID
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tasksByName[t.Name] = detail.ID
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results = append(results, ImportResult{Name: t.Name, TaskID: detail.ID, Success: true})
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}
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// 第二阶段：依赖链接（上游任务名 → 新 ID）
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for i, t := range payload.Tasks {
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if len(t.DependsOnTaskNames) == 0 {
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continue
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}
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id, ok := created[t.Name]
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if !ok {
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continue
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}
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deps := []uint{}
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for _, name := range t.DependsOnTaskNames {
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if depID, ok := tasksByName[name]; ok && depID != id {
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deps = append(deps, depID)
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}
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}
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if len(deps) == 0 {
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continue
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}
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input := s.toUpsertInput(t, targetsByName, nodesByName, deps)
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if _, err := s.tasks.Update(ctx, id, input); err != nil {
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// 已创建但依赖更新失败：降级为 warning，不影响任务本体
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for idx := range results {
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if results[idx].Name == t.Name {
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results[idx].Error = fmt.Sprintf("任务已创建，但依赖更新失败: %s", appErrorMessage(err))
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break
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}
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}
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_ = i
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}
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}
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return results, nil
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}
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func (s *TaskExportService) toExported(item *model.BackupTask, targetNames, nodeNames, taskNames map[uint]string) ExportedTask {
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sourcePaths := []string{}
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if strings.TrimSpace(item.SourcePaths) != "" {
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_ = json.Unmarshal([]byte(item.SourcePaths), &sourcePaths)
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}
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excludes := []string{}
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if strings.TrimSpace(item.ExcludePatterns) != "" {
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_ = json.Unmarshal([]byte(item.ExcludePatterns), &excludes)
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}
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var extra map[string]any
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if strings.TrimSpace(item.ExtraConfig) != "" {
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_ = json.Unmarshal([]byte(item.ExtraConfig), &extra)
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}
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storageNames := namesFromIDs(collectTargetIDs(item), targetNames)
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replicationNames := namesFromIDs(parseUintCSV(item.ReplicationTargetIDs), targetNames)
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dependsOnNames := namesFromIDs(parseUintCSV(item.DependsOnTaskIDs), taskNames)
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nodeName := ""
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if item.NodeID > 0 {
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nodeName = nodeNames[item.NodeID]
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}
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return ExportedTask{
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Name: item.Name,
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Type: item.Type,
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Enabled: item.Enabled,
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CronExpr: item.CronExpr,
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SourcePath: item.SourcePath,
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SourcePaths: sourcePaths,
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ExcludePatterns: excludes,
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DBHost: item.DBHost,
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DBPort: item.DBPort,
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DBUser: item.DBUser,
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DBName: item.DBName,
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DBPath: item.DBPath,
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ExtraConfig: extra,
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StorageTargetNames: storageNames,
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ReplicationTargetNames: replicationNames,
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NodeName: nodeName,
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DependsOnTaskNames: dependsOnNames,
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Tags: item.Tags,
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Compression: item.Compression,
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Encrypt: item.Encrypt,
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RetentionDays: item.RetentionDays,
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MaxBackups: item.MaxBackups,
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VerifyEnabled: item.VerifyEnabled,
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VerifyCronExpr: item.VerifyCronExpr,
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VerifyMode: item.VerifyMode,
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SLAHoursRPO: item.SLAHoursRPO,
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AlertOnConsecutiveFails: item.AlertOnConsecutiveFails,
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MaintenanceWindows: item.MaintenanceWindows,
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}
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}
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func (s *TaskExportService) toUpsertInput(t ExportedTask, targetsByName, nodesByName map[string]uint, deps []uint) BackupTaskUpsertInput {
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return BackupTaskUpsertInput{
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Name: t.Name,
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Type: t.Type,
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Enabled: t.Enabled,
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CronExpr: t.CronExpr,
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SourcePath: t.SourcePath,
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SourcePaths: t.SourcePaths,
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ExcludePatterns: t.ExcludePatterns,
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DBHost: t.DBHost,
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DBPort: t.DBPort,
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DBUser: t.DBUser,
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DBName: t.DBName,
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DBPath: t.DBPath,
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ExtraConfig: t.ExtraConfig,
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StorageTargetIDs: idsFromNames(t.StorageTargetNames, targetsByName),
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ReplicationTargetIDs: idsFromNames(t.ReplicationTargetNames, targetsByName),
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NodeID: nodesByName[t.NodeName],
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Tags: t.Tags,
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Compression: t.Compression,
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Encrypt: t.Encrypt,
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RetentionDays: t.RetentionDays,
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MaxBackups: t.MaxBackups,
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VerifyEnabled: t.VerifyEnabled,
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VerifyCronExpr: t.VerifyCronExpr,
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VerifyMode: t.VerifyMode,
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SLAHoursRPO: t.SLAHoursRPO,
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AlertOnConsecutiveFails: t.AlertOnConsecutiveFails,
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MaintenanceWindows: t.MaintenanceWindows,
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DependsOnTaskIDs: deps,
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}
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}
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func namesFromIDs(ids []uint, lookup map[uint]string) []string {
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out := make([]string, 0, len(ids))
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for _, id := range ids {
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if name, ok := lookup[id]; ok {
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out = append(out, name)
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}
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}
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return out
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}
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func idsFromNames(names []string, lookup map[string]uint) []uint {
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out := make([]uint, 0, len(names))
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for _, name := range names {
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if id, ok := lookup[name]; ok {
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out = append(out, id)
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}
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}
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return out
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}
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