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65 lines
1.7 KiB
65 lines
1.7 KiB
package localcache
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import (
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"context"
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"sync"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/common/config"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/discoveryregistry"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/errs"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/proto/group"
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"google.golang.org/grpc"
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)
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type GroupLocalCache struct {
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lock sync.Mutex
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cache map[string]GroupMemberIDsHash
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conn *grpc.ClientConn
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}
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type GroupMemberIDsHash struct {
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memberListHash uint64
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userIDs []string
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}
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func NewGroupLocalCache(client discoveryregistry.SvcDiscoveryRegistry) *GroupLocalCache {
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conn, err := client.GetConn(context.Background(), config.Config.RpcRegisterName.OpenImGroupName)
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if err != nil {
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panic(err)
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}
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return &GroupLocalCache{
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cache: make(map[string]GroupMemberIDsHash, 0),
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conn: conn,
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}
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}
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func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string) ([]string, error) {
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g.lock.Lock()
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defer g.lock.Unlock()
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client := group.NewGroupClient(g.conn)
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resp, err := client.GetGroupAbstractInfo(ctx, &group.GetGroupAbstractInfoReq{
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GroupIDs: []string{groupID},
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})
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if err != nil {
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return nil, err
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}
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if len(resp.GroupAbstractInfos) < 1 {
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return nil, errs.ErrGroupIDNotFound
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}
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localHashInfo, ok := g.cache[groupID]
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if ok && localHashInfo.memberListHash == resp.GroupAbstractInfos[0].GroupMemberListHash {
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return localHashInfo.userIDs, nil
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}
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groupMembersResp, err := client.GetGroupMemberUserIDs(ctx, &group.GetGroupMemberUserIDsReq{
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GroupID: groupID,
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})
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if err != nil {
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return nil, err
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}
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g.cache[groupID] = GroupMemberIDsHash{
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memberListHash: resp.GroupAbstractInfos[0].GroupMemberListHash,
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userIDs: groupMembersResp.UserIDs,
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}
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return g.cache[groupID].userIDs, nil
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}
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