215 lines
7.5 KiB
Go
215 lines
7.5 KiB
Go
package sv
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import (
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"context"
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"errors"
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"log"
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"strings"
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"time"
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outboxinfra "github.com/LoveLosita/smartflow/backend/shared/infra/outbox"
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forumdao "github.com/LoveLosita/smartflow/backend/services/taskclassforum/dao"
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forumcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/taskclassforum"
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sharedevents "github.com/LoveLosita/smartflow/backend/shared/events"
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"gorm.io/gorm"
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)
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const forumRewardPublishTimeout = 800 * time.Millisecond
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type transactionalEventPublisher interface {
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PublishWithTx(ctx context.Context, tx *gorm.DB, req outboxinfra.PublishRequest) error
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}
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// CommentTreeCachePort 是计划广场评论树缓存端口。
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//
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// 职责边界：
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// 1. 只暴露“读分页树、写分页树、递增版本”三个能力，避免 service 依赖 Redis 细节；
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// 2. 缓存内容必须是去个性化读模型，不能带入当前用户的 can_delete；
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// 3. Redis 异常不应影响主链路，service 层会降级回源 DB。
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type CommentTreeCachePort interface {
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GetCommentTree(ctx context.Context, postID uint64, page int, pageSize int, sort string) ([]forumcontracts.ForumCommentNode, forumcontracts.PageResult, bool, error)
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SetCommentTree(ctx context.Context, postID uint64, page int, pageSize int, sort string, items []forumcontracts.ForumCommentNode, pageResult forumcontracts.PageResult) error
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BumpCommentTreeVersion(ctx context.Context, postID uint64) error
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}
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// TaskClassSnapshotPort 是计划广场读取和写入 TaskClass 快照的端口。
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//
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// 职责边界：
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// 1. P0 先由 legacy adapter 适配旧 TaskClass DAO / Service；
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// 2. 业务层只依赖快照语义，不关心底层来自旧表、旧服务还是后续 RPC；
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// 3. 不负责写 schedule，一键导入只创建当前用户自己的 TaskClass 副本。
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type TaskClassSnapshotPort interface {
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GetOwnedTaskClassSnapshot(ctx context.Context, userID uint64, taskClassID uint64) (*TaskClassSnapshot, error)
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CreateTaskClassFromSnapshot(ctx context.Context, userID uint64, snapshot TaskClassSnapshot, targetTitle string) (*CreatedTaskClass, error)
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}
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// TaskClassSnapshot 是可分享的 TaskClass 白名单快照。
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//
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// 注意：这里刻意不包含 embedded_time、schedule 绑定和用户私有排程状态。
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type TaskClassSnapshot struct {
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TaskClassID uint64
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Title string
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Mode string
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StartDate string
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EndDate string
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SubjectType string
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DifficultyLevel string
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CognitiveIntensity string
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TotalSlots int
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AllowFillerCourse bool
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Strategy string
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ExcludedSlots []int
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ExcludedDaysOfWeek []int
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StrategyLabels []string
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Items []TaskClassSnapshotItem
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ConfigSnapshotJSON string
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}
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// TaskClassSnapshotItem 是 TaskClassItem 的可分享条目快照。
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type TaskClassSnapshotItem struct {
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TaskItemID uint64
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Order int
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Content string
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}
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// CreatedTaskClass 是导入后创建出的当前用户 TaskClass。
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type CreatedTaskClass struct {
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TaskClassID uint64
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Title string
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}
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// Options 是计划广场服务的依赖注入参数。
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type Options struct {
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DB *gorm.DB
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TaskClassPort TaskClassSnapshotPort
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EventPublisher outboxinfra.EventPublisher
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CommentTreeCache CommentTreeCachePort
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}
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// Service 承载计划广场服务内部业务编排。
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//
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// 职责边界：
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// 1. 负责帖子、模板快照、点赞、评论、导入记录的事务编排；
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// 2. 不负责 HTTP 参数绑定，也不直接返回 respond.Response；
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// 3. 不持有 TaskClass 原表，只通过 TaskClassSnapshotPort 读取和创建副本。
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type Service struct {
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db *gorm.DB
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forumDAO *forumdao.ForumDAO
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taskClassPort TaskClassSnapshotPort
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eventPublisher outboxinfra.EventPublisher
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commentTreeCache CommentTreeCachePort
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}
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func New(opts Options) *Service {
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return &Service{
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db: opts.DB,
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forumDAO: forumdao.NewForumDAO(opts.DB),
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taskClassPort: opts.TaskClassPort,
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eventPublisher: opts.EventPublisher,
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commentTreeCache: opts.CommentTreeCache,
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}
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}
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// Ready 用于第二步骨架阶段的依赖检查。
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//
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// 后续实现真实用例时，具体方法会做更细的参数校验；这里只先帮助 cmd / 测试快速发现依赖未注入。
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func (s *Service) Ready() error {
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if s == nil {
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return errors.New("taskclassforum service is nil")
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}
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if s.db == nil {
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return errors.New("taskclassforum db is nil")
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}
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return nil
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}
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// publishForumRewardEventBestEffort 在主事务成功后补发论坛奖励 outbox 事件。
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//
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// 职责边界：
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// 1. 这里只处理“事务已经成功提交后的补发”，不再回头影响点赞/导入接口的成功结果；
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// 2. 改用独立短超时 context，避免客户端断开直接打断补发，也避免 outbox 写入长时间拖慢接口尾部；
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// 3. 发布失败时只记日志不返回 error，这是 P0 的明确取舍：先保住主链路，再靠日志和稳定 event_id 排障/补偿。
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func (s *Service) publishForumRewardEventBestEffort(payload sharedevents.ForumPostRewardPayload) {
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if s == nil || s.eventPublisher == nil {
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return
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}
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if err := payload.Validate(); err != nil {
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log.Printf(
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"forum reward outbox payload 非法，跳过发布: event_id=%s post_id=%d import_id=%d source=%s err=%v",
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payload.EventID,
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payload.PostID,
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payload.ImportID,
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payload.Source,
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err,
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)
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return
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}
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eventType := strings.TrimSpace(payload.EventType())
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if eventType == "" {
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log.Printf(
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"forum reward outbox 事件类型为空，跳过发布: event_id=%s post_id=%d import_id=%d source=%s",
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payload.EventID,
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payload.PostID,
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payload.ImportID,
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payload.Source,
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)
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return
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}
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publishCtx, cancel := context.WithTimeout(context.Background(), forumRewardPublishTimeout)
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defer cancel()
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if err := s.eventPublisher.Publish(publishCtx, outboxinfra.PublishRequest{
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EventType: eventType,
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EventVersion: sharedevents.ForumRewardEventVersion,
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MessageKey: payload.MessageKey(),
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AggregateID: payload.AggregateID(),
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EventID: payload.EventID,
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Payload: payload,
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}); err != nil {
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log.Printf(
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"forum reward outbox 发布失败，按 P0 约定忽略主链路错误: event_type=%s event_id=%s post_id=%d import_id=%d actor_user_id=%d err=%v",
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eventType,
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payload.EventID,
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payload.PostID,
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payload.ImportID,
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payload.ActorUserID,
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err,
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)
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}
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}
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// publishForumRewardEventInTx 尝试把论坛奖励事件写进当前业务事务。
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//
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// 返回值说明：
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// 1. handled=true 表示发布器支持事务写入，调用方不需要再做事务后 best-effort 补发；
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// 2. handled=false 表示当前发布器不支持事务写入，调用方可退回旧的事务后补发路径；
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// 3. error 非空表示 outbox 入队失败，业务事务应一起回滚，避免成功互动永久漏奖。
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func (s *Service) publishForumRewardEventInTx(ctx context.Context, tx *gorm.DB, payload sharedevents.ForumPostRewardPayload) (bool, error) {
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if s == nil || s.eventPublisher == nil {
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return false, nil
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}
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publisher, ok := s.eventPublisher.(transactionalEventPublisher)
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if !ok {
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return false, nil
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}
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if err := payload.Validate(); err != nil {
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return true, err
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}
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eventType := strings.TrimSpace(payload.EventType())
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if eventType == "" {
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return true, errors.New("论坛奖励事件类型为空")
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}
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return true, publisher.PublishWithTx(ctx, tx, outboxinfra.PublishRequest{
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EventType: eventType,
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EventVersion: sharedevents.ForumRewardEventVersion,
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MessageKey: payload.MessageKey(),
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AggregateID: payload.AggregateID(),
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EventID: payload.EventID,
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Payload: payload,
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})
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}
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