mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-03-30 22:31:03 +00:00
df6ef45a2d
* feat: promisify all api methods that accept callbacks This is a stop-gap until the full async/await migration can be completed. It means we can refactor tests of other modules that depend on this module without having to mix async flow control strategies. N.b. some methods that were previously callable without callbacks (e.g. `node.start()`, `node.stop()`, etc) now require callbacks otherwise a promise is returned which, if rejected, can cause `unhandledPromiseRejection` events and lead to memory leaks. * docs: add a global note to the api about promisify * fix: update the logic for unsubscribe * test(fix): correct pubsub unsubscribe usage for api change * test(fix): update content routing tests for latest delegate version
60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
'use strict'
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const tryEach = require('async/tryEach')
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const errCode = require('err-code')
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const promisify = require('promisify-es6')
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module.exports = (node) => {
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const routers = node._modules.peerRouting || []
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// If we have the dht, make it first
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if (node._dht) {
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routers.unshift(node._dht)
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}
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return {
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/**
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* Iterates over all peer routers in series to find the given peer.
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*
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* @param {String} id The id of the peer to find
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* @param {object} options
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* @param {number} options.maxTimeout How long the query should run
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* @param {function(Error, Result<Array>)} callback
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* @returns {void}
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*/
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findPeer: promisify((id, options, callback) => {
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if (typeof options === 'function') {
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callback = options
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options = {}
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}
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if (!routers.length) {
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callback(errCode(new Error('No peer routers available'), 'NO_ROUTERS_AVAILABLE'))
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}
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const tasks = routers.map((router) => {
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return (cb) => router.findPeer(id, options, (err, result) => {
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if (err) {
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return cb(err)
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}
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// If we don't have a result, we need to provide an error to keep trying
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if (!result || Object.keys(result).length === 0) {
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return cb(errCode(new Error('not found'), 'NOT_FOUND'), null)
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}
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cb(null, result)
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})
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})
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tryEach(tasks, (err, results) => {
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if (err) {
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return callback(err)
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}
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results = results || []
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callback(null, results)
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})
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})
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}
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}
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