mirror of https://github.com/vacp2p/nim-libp2p.git
43 lines
1.4 KiB
Nim
43 lines
1.4 KiB
Nim
## Nim-LibP2P
|
|
## Copyright (c) 2019 Status Research & Development GmbH
|
|
## Licensed under either of
|
|
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
|
|
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
|
|
## at your option.
|
|
## This file may not be copied, modified, or distributed except according to
|
|
## those terms.
|
|
|
|
import tables, sequtils, sets
|
|
import pubsubpeer
|
|
|
|
type
|
|
PeerTable* = Table[string, HashSet[PubSubPeer]]
|
|
|
|
proc hasPeerID*(t: PeerTable, topic, peerId: string): bool =
|
|
# unefficient but used only in tests!
|
|
let peers = toSeq(t.getOrDefault(topic))
|
|
peers.any do (peer: PubSubPeer) -> bool:
|
|
peer.id == peerId
|
|
|
|
func addPeer*(table: var PeerTable, topic: string, peer: PubSubPeer): bool =
|
|
# returns true if the peer was added, false if it was already in the collection
|
|
not table.mgetOrPut(topic, initHashSet[PubSubPeer]()).containsOrIncl(peer)
|
|
|
|
func removePeer*(table: var PeerTable, topic: string, peer: PubSubPeer) =
|
|
table.withValue(topic, peers):
|
|
peers[].excl(peer)
|
|
if peers[].len == 0:
|
|
table.del(topic)
|
|
|
|
func hasPeer*(table: PeerTable, topic: string, peer: PubSubPeer): bool =
|
|
(topic in table) and (peer in table[topic])
|
|
|
|
func peers*(table: PeerTable, topic: string): int =
|
|
if topic in table:
|
|
table[topic].len
|
|
else:
|
|
0
|
|
|
|
func getPeers*(table: Table[string, HashSet[string]], topic: string): HashSet[string] =
|
|
table.getOrDefault(topic, initHashSet[string]())
|