321 lines
7.8 KiB
Go
321 lines
7.8 KiB
Go
package service
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import (
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"context"
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"sync"
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"time"
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"go-common/app/admin/main/reply/model"
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"go-common/library/database/sql"
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"go-common/library/ecode"
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"go-common/library/sync/errgroup.v2"
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)
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func compose(oids, tps, rpIDs []int64) (rpMap map[int64][]int64, tpMap map[int64]int64) {
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if len(oids) != len(rpIDs) {
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return
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}
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rpMap = make(map[int64][]int64)
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tpMap = make(map[int64]int64)
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for i, oid := range oids {
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if _, ok := rpMap[oid]; ok {
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rpMap[oid] = append(rpMap[oid], rpIDs[i])
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} else {
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rpMap[oid] = []int64{rpIDs[i]}
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}
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tpMap[oid] = tps[i]
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}
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return
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}
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func extend(oid int64, length int) []int64 {
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oids := make([]int64, 0, length)
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for i := 0; i < length; i++ {
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oids = append(oids, oid)
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}
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return oids
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}
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// FoldReplies ...
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func (s *Service) FoldReplies(ctx context.Context, oids, tps, rpIDs []int64) (err error) {
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g := errgroup.WithContext(ctx)
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g.GOMAXPROCS(2)
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rpMap, tpMap := compose(oids, tps, rpIDs)
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for oid, IDs := range rpMap {
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if tp, ok := tpMap[oid]; ok {
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oid, tp, IDs := oid, tp, IDs
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g.Go(func(ctx context.Context) error {
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return s.foldReplies(ctx, oid, tp, IDs)
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})
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}
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}
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return g.Wait()
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}
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func (s *Service) foldReplies(ctx context.Context, oid, tp int64, rpIDs []int64) (err error) {
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var (
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sub *model.Subject
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// 所有的评论，包含需要被折叠的子评论的根评论
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rpMap = make(map[int64]*model.Reply)
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// 需要被折叠的子评论的根评论IDs
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roots []int64
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rootMap map[int64]*model.Reply
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// 应该被折叠的评论map
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rps = make(map[int64]*model.Reply)
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mu sync.Mutex
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)
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if sub, err = s.subject(ctx, oid, int32(tp)); err != nil {
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return
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}
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if rpMap, err = s.dao.Replies(ctx, extend(oid, len(rpIDs)), rpIDs); err != nil {
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return
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}
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for _, rp := range rpMap {
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if !rp.IsRoot() {
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roots = append(roots, rp.Root)
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}
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rps[rp.ID] = rp
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}
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if len(roots) > 0 {
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if rootMap, err = s.dao.Replies(ctx, extend(oid, len(roots)), roots); err != nil {
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return
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}
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for _, root := range rootMap {
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rpMap[root.ID] = root
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}
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}
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g := errgroup.WithContext(ctx)
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g.GOMAXPROCS(4)
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for rpID := range rps {
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rpID := rpID
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g.Go(func(ctx context.Context) error {
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if err := s.tranFoldReply(ctx, sub.Oid, rpID); err != nil {
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mu.Lock()
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delete(rps, rpID)
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mu.Unlock()
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return err
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}
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return nil
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})
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}
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err = g.Wait()
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for _, rp := range rps {
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// 这里不是删除，是为了让reply-feed去掉热评, 折叠评论是可以有互动行为的， 所以这里异步，丢了也无所谓
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rp := rp
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s.cache.Do(ctx, func(ctx context.Context) {
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s.pubEvent(ctx, "reply_del", 0, sub, rp, nil)
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})
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}
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// 标记数据库有折叠评论, rpMap 是所有的被折叠评论以及他们的根评论
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s.markHasFolded(ctx, rps, rpMap, sub)
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s.handleCacheByFold(ctx, rps, rpMap, sub)
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return err
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}
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// handleCacheByFold ...
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func (s *Service) handleCacheByFold(ctx context.Context, rps map[int64]*model.Reply, rpMap map[int64]*model.Reply, sub *model.Subject) {
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var (
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roots []int64
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childMap = make(map[int64][]int64)
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)
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for _, rp := range rps {
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if rp.IsRoot() {
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roots = append(roots, rp.ID)
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} else {
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childMap[rp.Root] = append(childMap[rp.Root], rp.ID)
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}
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}
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s.cacheOperater.Do(ctx, func(ctx context.Context) {
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// 删正常列表的redis缓存
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s.dao.RemRdsByFold(ctx, roots, childMap, sub, rpMap)
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// 加折叠列表redis缓存
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s.dao.AddRdsByFold(ctx, roots, childMap, sub, rpMap)
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})
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}
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// markAsFolded ...
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func (s *Service) markHasFolded(ctx context.Context, foldedRp map[int64]*model.Reply, rpMap map[int64]*model.Reply, sub *model.Subject) {
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var (
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dirtyCacheRpIDs []int64
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markedRpIDs []int64
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)
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for _, rp := range foldedRp {
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rp := rp
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if rp.IsRoot() {
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// 如果subject还没被标记过
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if !sub.HasFolded() {
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sub.MarkHasFolded()
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// 修改数据库标记
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s.marker.Do(ctx, func(ctx context.Context) {
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if err := s.tranMarkSubHasFolded(ctx, sub.Oid, sub.Type); err != nil {
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return
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}
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})
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// 删掉 subject mc
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s.cacheOperater.Do(ctx, func(ctx context.Context) {
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s.dao.DelSubjectCache(ctx, sub.Oid, sub.Type)
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})
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}
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} else {
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if _, ok := rpMap[rp.Root]; ok {
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markedRpIDs = append(markedRpIDs, rp.Root)
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}
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}
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dirtyCacheRpIDs = append(dirtyCacheRpIDs, rp.ID)
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}
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for _, rpID := range markedRpIDs {
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// 修改数据库标记
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rpID := rpID
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s.marker.Do(ctx, func(ctx context.Context) {
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if err := s.tranMarkReplyHasFolded(ctx, sub.Oid, rpID); err != nil {
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return
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}
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})
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}
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dirtyCacheRpIDs = append(dirtyCacheRpIDs, markedRpIDs...)
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for _, rpID := range dirtyCacheRpIDs {
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// 删除被折叠子评论的根评论以及被折叠的子评论和根评论
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rpID := rpID
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s.cacheOperater.Do(ctx, func(ctx context.Context) {
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s.dao.DelReplyCache(ctx, rpID)
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})
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}
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}
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func (s *Service) tranFoldReply(ctx context.Context, oid, rpID int64) (err error) {
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var (
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tx *sql.Tx
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rp *model.Reply
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)
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if tx, err = s.dao.BeginTran(ctx); err != nil {
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return
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}
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if rp, err = s.dao.TxReplyForUpdate(tx, oid, rpID); err != nil {
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tx.Rollback()
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return
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}
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if rp.DenyFolded() {
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tx.Rollback()
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return ecode.ReplyForbidFolded
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}
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if _, err = s.dao.TxUpdateReplyState(tx, oid, rpID, model.StateFolded, time.Now()); err != nil {
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tx.Rollback()
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return
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}
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return tx.Commit()
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}
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func (s *Service) tranMarkReplyHasFolded(ctx context.Context, oid, rpID int64) (err error) {
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var (
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tx *sql.Tx
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rp *model.Reply
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)
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if tx, err = s.dao.BeginTran(ctx); err != nil {
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return
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}
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if rp, err = s.dao.TxReplyForUpdate(tx, oid, rpID); err != nil {
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tx.Rollback()
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return
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}
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rp.MarkHasFolded()
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if _, err = s.dao.TxUpReplyAttr(tx, oid, rpID, rp.Attr, time.Now()); err != nil {
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tx.Rollback()
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return
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}
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return tx.Commit()
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}
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func (s *Service) tranMarkSubHasFolded(ctx context.Context, oid int64, tp int32) (err error) {
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var (
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tx *sql.Tx
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sub *model.Subject
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)
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if tx, err = s.dao.BeginTran(ctx); err != nil {
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return
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}
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if sub, err = s.dao.TxSubjectForUpdate(tx, oid, tp); err != nil {
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tx.Rollback()
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return
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}
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sub.MarkHasFolded()
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if _, err = s.dao.TxUpSubAttr(tx, oid, tp, sub.Attr, time.Now()); err != nil {
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tx.Rollback()
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return
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}
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return tx.Commit()
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}
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// handleFolded 处理折叠评论的逻辑，包括折叠评论被删除等， 状态改变之后标记改变的问题...
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func (s *Service) handleFolded(ctx context.Context, rp *model.Reply) {
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sub, root, err := s.handleHasFoldedMark(ctx, rp.Oid, rp.Type, rp.Root)
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if err != nil {
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return
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}
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if sub != nil {
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s.dao.DelSubjectCache(ctx, sub.Oid, sub.Type)
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}
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if root != nil {
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s.dao.DelReplyCache(ctx, root.ID)
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}
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s.remFoldedCache(ctx, rp)
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}
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func (s *Service) handleHasFoldedMark(ctx context.Context, oid int64, tp int32, root int64) (sub *model.Subject, reply *model.Reply, err error) {
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var (
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tx *sql.Tx
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count int
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)
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if tx, err = s.dao.BeginTran(ctx); err != nil {
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return
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}
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// 锁subject表
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if sub, err = s.dao.TxSubjectForUpdate(tx, oid, tp); err != nil {
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tx.Rollback()
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return
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}
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if count, err = s.dao.TxCountFoldedReplies(tx, oid, tp, root); err != nil || count > 0 {
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tx.Rollback()
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return
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}
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// 折叠根评论
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if root == 0 {
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if !sub.HasFolded() {
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tx.Rollback()
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return
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}
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sub.UnmarkHasFolded()
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if _, err = s.dao.TxUpSubAttr(tx, oid, tp, sub.Attr, time.Now()); err != nil {
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tx.Rollback()
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return
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}
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} else {
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if reply, err = s.dao.TxReplyForUpdate(tx, oid, root); err != nil {
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tx.Rollback()
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return
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}
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if !reply.HasFolded() {
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tx.Rollback()
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return
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}
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reply.UnmarkHasFolded()
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if _, err = s.dao.TxUpReplyAttr(tx, oid, root, reply.Attr, time.Now()); err != nil {
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tx.Rollback()
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return
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}
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}
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if err = tx.Commit(); err != nil {
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return
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}
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return
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}
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// remFoldedCache ...
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func (s *Service) remFoldedCache(ctx context.Context, rp *model.Reply) {
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if rp.IsRoot() {
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s.dao.RemFolder(ctx, model.FolderKindSub, rp.Oid, rp.ID)
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} else {
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s.dao.RemFolder(ctx, model.FolderKindRoot, rp.Root, rp.ID)
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}
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}
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