refactoring scheduled tasks

internal/rpc/msg/clear.go

@@ -2,6 +2,7 @@ package msg
 
 import (
 	"context"
+	"strings"
 	"time"
 
 	"github.com/openimsdk/open-im-server/v3/pkg/authverify"
@@ -26,52 +27,42 @@ func (m *msgServer) DestructMsgs(ctx context.Context, req *msg.DestructMsgsReq)
 	if req.Timestamp > time.Now().UnixMilli() {
 		return nil, errs.ErrArgs.WrapMsg("request millisecond timestamp error")
 	}
-	var (
-		docNum   int
-		msgNum   int
-		start    = time.Now()
-		getLimit = 5000
-	)
-
-	destructMsg := func(ctx context.Context) (bool, error) {
-		docIDs, err := m.MsgDatabase.GetDocIDs(ctx)
-		if err != nil {
-			return false, err
-		}
-
-		msgs, err := m.MsgDatabase.GetBeforeMsg(ctx, req.Timestamp, docIDs, getLimit)
-		if err != nil {
-			return false, err
-		}
-		if len(msgs) == 0 {
-			return false, nil
-		}
-
-		for _, msg := range msgs {
-			index, err := m.MsgDatabase.DeleteDocMsgBefore(ctx, req.Timestamp, msg)
-			if err != nil {
-				return false, err
-			}
-			if len(index) == 0 {
-				return false, errs.ErrInternalServer.WrapMsg("delete doc msg failed")
-			}
-
-			docNum++
-			msgNum += len(index)
-		}
-
-		return true, nil
+	if req.Limit <= 0 {
+		return nil, errs.ErrArgs.WrapMsg("request limit error")
 	}
-
-	_, err = destructMsg(ctx)
+	docs, err := m.MsgDatabase.GetRandBeforeMsg(ctx, req.Timestamp, int(req.Limit))
 	if err != nil {
-		log.ZError(ctx, "clear msg failed", err, "docNum", docNum, "msgNum", msgNum, "cost", time.Since(start))
 		return nil, err
 	}
-
-	log.ZDebug(ctx, "clearing message", "docNum", docNum, "msgNum", msgNum, "cost", time.Since(start))
-
-	return &msg.DestructMsgsResp{}, nil
+	for _, doc := range docs {
+		if err := m.MsgDatabase.DeleteDoc(ctx, doc.DocID); err != nil {
+			return nil, err
+		}
+		index := strings.LastIndex(doc.DocID, ":")
+		if index < 0 {
+			continue
+		}
+		var minSeq int64
+		for _, model := range doc.Msg {
+			if model.Msg == nil {
+				continue
+			}
+			if model.Msg.Seq > minSeq {
+				minSeq = model.Msg.Seq
+			}
+		}
+		if minSeq <= 0 {
+			continue
+		}
+		conversationID := doc.DocID[:index]
+		if conversationID == "" {
+			continue
+		}
+		if err := m.MsgDatabase.SetMinSeq(ctx, conversationID, minSeq); err != nil {
+			return nil, err
+		}
+	}
+	return &msg.DestructMsgsResp{Count: int32(len(docs))}, nil
 }
 
 // soft delete for user self