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message_filter.go
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message_filter.go
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package group
import "github.com/ipfs/go-log/v2"
// InactiveMemberFilter is a proxy facilitates filtering out inactive members
// in the given phase and registering their final list in the Group.
type InactiveMemberFilter struct {
logger log.StandardLogger
selfMemberID MemberIndex
group *Group
phaseActiveMembers []MemberIndex
}
// NewInactiveMemberFilter creates a new instance of InactiveMemberFilter.
// It accepts member index of the current member (the one which will be
// filtering out other group members for inactivity) and the reference to Group
// to which all those members belong.
func NewInactiveMemberFilter(
logger log.StandardLogger,
selfMemberIndex MemberIndex,
group *Group,
) *InactiveMemberFilter {
return &InactiveMemberFilter{
logger: logger,
selfMemberID: selfMemberIndex,
group: group,
phaseActiveMembers: make([]MemberIndex, 0),
}
}
// MarkMemberAsActive marks member with the given index as active in the given
// phase.
func (mf *InactiveMemberFilter) MarkMemberAsActive(memberID MemberIndex) {
mf.phaseActiveMembers = append(mf.phaseActiveMembers, memberID)
}
// FlushInactiveMembers takes all members who were not previously marked as
// active and flushes them to the group as inactive members.
func (mf *InactiveMemberFilter) FlushInactiveMembers() {
isActive := func(id MemberIndex) bool {
if id == mf.selfMemberID {
return true
}
for _, activeMemberID := range mf.phaseActiveMembers {
if activeMemberID == id {
return true
}
}
return false
}
for _, operatingMemberID := range mf.group.OperatingMemberIndexes() {
if !isActive(operatingMemberID) {
mf.logger.Warnf(
"[member:%v] marking member [%v] as inactive",
mf.selfMemberID,
operatingMemberID,
)
mf.group.MarkMemberAsInactive(operatingMemberID)
}
}
}