-
Notifications
You must be signed in to change notification settings - Fork 445
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
d313299
commit 0fb7dc1
Showing
12 changed files
with
913 additions
and
146 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| 'use strict' | ||
|
|
||
| class Topology { | ||
| /** | ||
| * @param {Object} props | ||
| * @param {number} props.min minimum needed connections (default: 0) | ||
| * @param {number} props.max maximum needed connections (default: Infinity) | ||
| * @param {function} props.onConnect protocol "onConnect" handler | ||
| * @param {function} props.onDisconnect protocol "onDisconnect" handler | ||
| * @param {Array<string>} props.multicodecs protocol multicodecs | ||
| * @param {Registrar} registrar | ||
| * @constructor | ||
| */ | ||
| constructor ({ | ||
| min = 0, | ||
| max = Infinity, | ||
| onConnect, | ||
| onDisconnect, | ||
| multicodecs, | ||
| registrar | ||
| }) { | ||
| this.multicodecs = multicodecs | ||
| this.registrar = registrar | ||
| this.min = min | ||
| this.max = max | ||
| this.peers = new Map() | ||
|
|
||
| // Handlers | ||
| this._onConnect = onConnect | ||
| this._onDisconnect = onDisconnect | ||
|
|
||
| this._onProtocolChange = this._onProtocolChange.bind(this) | ||
|
|
||
| // Set by the registrar | ||
| this._peerStore = null | ||
| } | ||
|
|
||
| /** | ||
| * Set peerstore to the topology. | ||
| * @param {PeerStore} peerStore | ||
| */ | ||
| set peerStore (peerStore) { | ||
| this._peerStore = peerStore | ||
|
|
||
| this._peerStore.on('change:protocols', this._onProtocolChange) | ||
| } | ||
|
|
||
| /** | ||
| * Try to add a connected peer to the topology, if inside the thresholds. | ||
| * @param {PeerInfo} peerInfo | ||
| * @param {Connection} connection | ||
| * @returns {void} | ||
| */ | ||
| tryToConnect (peerInfo, connection) { | ||
| // TODO: conn manager should validate if it should try to connect | ||
|
|
||
| this._onConnect(peerInfo, connection) | ||
|
|
||
| this.peers.set(peerInfo.id.toB58String(), peerInfo) | ||
| } | ||
|
|
||
| /** | ||
| * Notify protocol of peer disconnected. | ||
| * @param {PeerInfo} peerInfo | ||
| * @param {Error} [error] | ||
| * @returns {void} | ||
| */ | ||
| disconnect (peerInfo, error) { | ||
| if (this.peers.delete(peerInfo.id.toB58String())) { | ||
| this._onDisconnect(peerInfo, error) | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Check if a new peer support the multicodecs for this topology. | ||
| * @param {Object} props | ||
| * @param {PeerInfo} props.peerInfo | ||
| * @param {Array<string>} props.protocols | ||
| */ | ||
| _onProtocolChange ({ peerInfo, protocols }) { | ||
| const existingPeer = this.peers.get(peerInfo.id.toB58String()) | ||
|
|
||
| protocols.filter(protocol => this.multicodecs.includes(protocol)) | ||
|
|
||
| // Not supporting the protocol anymore? | ||
| if (existingPeer && protocols.filter(protocol => this.multicodecs.includes(protocol)).length === 0) { | ||
| this._onDisconnect({ | ||
| peerInfo | ||
| }) | ||
| } | ||
|
|
||
| // New to protocol support | ||
| for (const protocol of protocols) { | ||
| if (this.multicodecs.includes(protocol)) { | ||
| this.tryToConnect(peerInfo, this.registrar.getPeerConnection(peerInfo)) | ||
| return | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| module.exports = Topology |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.