This repository has been archived by the owner on Apr 6, 2020. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 63
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
977b67d
commit 3783ed4
Showing
3 changed files
with
86 additions
and
10 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
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // Copyright Joyent, Inc. and other Node contributors. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a | ||
| // copy of this software and associated documentation files (the | ||
| // "Software"), to deal in the Software without restriction, including | ||
| // without limitation the rights to use, copy, modify, merge, publish, | ||
| // distribute, sublicense, and/or sell copies of the Software, and to permit | ||
| // persons to whom the Software is furnished to do so, subject to the | ||
| // following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included | ||
| // in all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN | ||
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | ||
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||
| // USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
|
|
||
| function callbackifyOnRejected(reason: any, cb: any) { | ||
| // `!reason` guard inspired by bluebird (Ref: https://goo.gl/t5IS6M). | ||
| // Because `null` is a special error value in callbacks which means "no error | ||
| // occurred", we error-wrap so the callback consumer can distinguish between | ||
| // "the promise rejected with null" or "the promise fulfilled with undefined". | ||
| if (!reason) { | ||
| const newReason = new Error('Promise was rejected with a falsy value') as any | ||
| newReason.reason = reason | ||
| reason = newReason | ||
| } | ||
| return cb(reason) | ||
| } | ||
|
|
||
| export function callbackify(original: any): any { | ||
| if (typeof original !== 'function') { | ||
| throw new TypeError('The "original" argument must be of type Function') | ||
| } | ||
|
|
||
| // We DO NOT return the promise as it gives the user a false sense that | ||
| // the promise is actually somehow related to the callback's execution | ||
| // and that the callback throwing will reject the promise. | ||
| function callbackified(this: any) { | ||
| const args = [] | ||
| for (let i = 0; i < arguments.length; i++) { | ||
| args.push(arguments[i]) | ||
| } | ||
|
|
||
| const maybeCb = args.pop() | ||
| if (typeof maybeCb !== 'function') { | ||
| throw new TypeError('The last argument must be of type Function') | ||
| } | ||
|
|
||
| //tslint:disable-next-line no-invalid-this | ||
| const self = this | ||
| const cb = function() { | ||
| return maybeCb.apply(self, arguments) | ||
| } | ||
|
|
||
| // In true node style we process the callback on `nextTick` with all the | ||
| // implications (stack, `uncaughtException`, `async_hooks`) | ||
| //tslint:disable-next-line no-invalid-this | ||
| original.apply(this, args).then( | ||
| function(ret: any) { | ||
| process.nextTick(cb.bind(null, null, ret)) | ||
| }, | ||
| function(rej: any) { | ||
| process.nextTick(callbackifyOnRejected.bind(null, rej, cb)) | ||
| }, | ||
| ) | ||
| } | ||
|
|
||
| Object.setPrototypeOf(callbackified, Object.getPrototypeOf(original)) | ||
| Object.defineProperties(callbackified, Object.getOwnPropertyDescriptors(original)) | ||
|
|
||
| return callbackified | ||
| } |
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