func appendable(datfile string, n *node.Node) bool {
l := listLen(datfile)
return ((datfile != "" && l < shareNodes) ||
(datfile == "" && l < defaultNodes)) &&
n != nil && n.IsAllowed() && !hasNodeInTable(datfile, n)
}
//ReplaceNodeInList removes one node and say bye to the node and add n in nodelist.
//if len(node)>defaultnode
func ReplaceNodeInList(n *node.Node) *node.Node {
l := ListLen()
if !n.IsAllowed() || hasNodeInTable(list, n) {
return nil
}
var old *node.Node
if l >= defaultNodes {
old = getFromList()
RemoveFromList(old)
old.Bye()
}
err := db.DB.Update(func(tx *bolt.Tx) error {
appendToList(tx, n)
return nil
})
if err != nil {
log.Println(err)
}
return old
}