49 lines
821 B
Go
49 lines
821 B
Go
package pubsub
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import (
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"context"
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"github.com/libp2p/go-libp2p-core/peer"
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)
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type Subscription struct {
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topic string
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ch chan *Message
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cancelCh chan<- *Subscription
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inboundSubs chan peer.ID
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err error
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}
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func (sub *Subscription) Topic() string {
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return sub.topic
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}
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func (sub *Subscription) Next(ctx context.Context) (*Message, error) {
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select {
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case msg, ok := <-sub.ch:
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if !ok {
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return msg, sub.err
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}
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return msg, nil
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case <-ctx.Done():
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return nil, ctx.Err()
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}
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}
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func (sub *Subscription) Cancel() {
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sub.cancelCh <- sub
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}
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func (sub *Subscription) NextSubscribedPeer(ctx context.Context) (peer.ID, error) {
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select {
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case newPeer, ok := <-sub.inboundSubs:
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if !ok {
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return newPeer, sub.err
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}
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return newPeer, nil
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case <-ctx.Done():
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return "", ctx.Err()
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}
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}
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