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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/promise-inflight/inflight.js
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Diffstat (limited to 'node_modules/promise-inflight/inflight.js')
-rw-r--r--node_modules/promise-inflight/inflight.js36
1 files changed, 36 insertions, 0 deletions
diff --git a/node_modules/promise-inflight/inflight.js b/node_modules/promise-inflight/inflight.js
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+++ b/node_modules/promise-inflight/inflight.js
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+'use strict'
+module.exports = inflight
+
+let Bluebird
+try {
+ Bluebird = require('bluebird')
+} catch (_) {
+ Bluebird = Promise
+}
+
+const active = {}
+inflight.active = active
+function inflight (unique, doFly) {
+ return Bluebird.all([unique, doFly]).then(function (args) {
+ const unique = args[0]
+ const doFly = args[1]
+ if (Array.isArray(unique)) {
+ return Bluebird.all(unique).then(function (uniqueArr) {
+ return _inflight(uniqueArr.join(''), doFly)
+ })
+ } else {
+ return _inflight(unique, doFly)
+ }
+ })
+
+ function _inflight (unique, doFly) {
+ if (!active[unique]) {
+ active[unique] = (new Bluebird(function (resolve) {
+ return resolve(doFly())
+ }))
+ active[unique].then(cleanup, cleanup)
+ function cleanup() { delete active[unique] }
+ }
+ return active[unique]
+ }
+}