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feat: use PubSub API directly from libp2p
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,96 +1,48 @@ | ||
| 'use strict' | ||
|
|
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| const promisify = require('promisify-es6') | ||
| const setImmediate = require('async/setImmediate') | ||
|
|
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| const OFFLINE_ERROR = require('../utils').OFFLINE_ERROR | ||
|
|
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| module.exports = function pubsub (self) { | ||
| return { | ||
| subscribe: (topic, options, handler, callback) => { | ||
| if (!self.isOnline()) { | ||
| throw new Error(OFFLINE_ERROR) | ||
| } | ||
|
|
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| if (typeof options === 'function') { | ||
| callback = handler | ||
| handler = options | ||
| options = {} | ||
| } | ||
|
|
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| function subscribe (cb) { | ||
| if (self._pubsub.listenerCount(topic) === 0) { | ||
| self._pubsub.subscribe(topic) | ||
| } | ||
|
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| self._pubsub.on(topic, handler) | ||
| setImmediate(cb) | ||
| } | ||
|
|
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| if (!callback) { | ||
| return new Promise((resolve, reject) => { | ||
| subscribe((err) => { | ||
| self.libp2p.pubsub.subscribe(topic, options, handler, (err) => { | ||
| if (err) { | ||
| return reject(err) | ||
| } | ||
| resolve() | ||
| }) | ||
| }) | ||
| } else { | ||
| subscribe(callback) | ||
| self.libp2p.pubsub.subscribe(topic, options, handler, callback) | ||
| } | ||
| }, | ||
|
|
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| unsubscribe: (topic, handler) => { | ||
| self._pubsub.removeListener(topic, handler) | ||
|
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| if (self._pubsub.listenerCount(topic) === 0) { | ||
| self._pubsub.unsubscribe(topic) | ||
| } | ||
| self.libp2p.pubsub.unsubscribe(topic, handler) | ||
| }, | ||
|
|
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| publish: promisify((topic, data, callback) => { | ||
| if (!self.isOnline()) { | ||
| return setImmediate(() => callback(new Error(OFFLINE_ERROR))) | ||
| } | ||
|
|
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| if (!Buffer.isBuffer(data)) { | ||
| return setImmediate(() => callback(new Error('data must be a Buffer'))) | ||
| } | ||
|
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| self._pubsub.publish(topic, data) | ||
| setImmediate(() => callback()) | ||
| self.libp2p.pubsub.publish(topic, data, callback) | ||
| }), | ||
|
|
||
| ls: promisify((callback) => { | ||
| if (!self.isOnline()) { | ||
| return setImmediate(() => callback(new Error(OFFLINE_ERROR))) | ||
| } | ||
|
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| const subscriptions = Array.from(self._pubsub.subscriptions) | ||
|
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| setImmediate(() => callback(null, subscriptions)) | ||
| self.libp2p.pubsub.ls(callback) | ||
| }), | ||
|
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| peers: promisify((topic, callback) => { | ||
| if (!self.isOnline()) { | ||
| return setImmediate(() => callback(new Error(OFFLINE_ERROR))) | ||
| } | ||
|
|
||
| if (typeof topic === 'function') { | ||
| callback = topic | ||
| topic = null | ||
| } | ||
|
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| const peers = Array.from(self._pubsub.peers.values()) | ||
| .filter((peer) => topic ? peer.topics.has(topic) : true) | ||
| .map((peer) => peer.info.id.toB58String()) | ||
|
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| setImmediate(() => callback(null, peers)) | ||
| self.libp2p.pubsub.peers(topic, callback) | ||
| }), | ||
|
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| setMaxListeners (n) { | ||
| return self._pubsub.setMaxListeners(n) | ||
| self.libp2p.pubsub.setMaxListeners(n) | ||
| } | ||
| } | ||
| } |
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