mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-30 16:18:07 +01:00
ac01c5c89a
* Specify type before parameter name
Various JSDoc `@param` entries were specified as `name {type}` rather
than `{type} name`.
A couple of `@return` entries have been given types as well.
* Use JSDoc optional syntax rather than Closure syntax
* Use @returns rather than @return
* Use consistent built-in type capitalization
Primitive types are lower-case, and Object is upper-case.
* Separate param/return description with a dash
41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
import promiseToCallback from 'promise-to-callback'
|
|
|
|
const callbackNoop = function (err) {
|
|
if (err) {
|
|
throw err
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A generator that returns a function which, when passed a promise, can treat that promise as a node style callback.
|
|
* The prime advantage being that callbacks are better for error handling.
|
|
*
|
|
* @param {Function} fn - The function to handle as a callback
|
|
* @param {Object} context - The context in which the fn is to be called, most often a this reference
|
|
*
|
|
*/
|
|
export default function nodeify (fn, context) {
|
|
return function () {
|
|
// parse arguments
|
|
const args = [].slice.call(arguments)
|
|
const lastArg = args[args.length - 1]
|
|
const lastArgIsCallback = typeof lastArg === 'function'
|
|
let callback
|
|
if (lastArgIsCallback) {
|
|
callback = lastArg
|
|
args.pop()
|
|
} else {
|
|
callback = callbackNoop
|
|
}
|
|
// call the provided function and ensure result is a promise
|
|
let result
|
|
try {
|
|
result = Promise.resolve(fn.apply(context, args))
|
|
} catch (err) {
|
|
result = Promise.reject(err)
|
|
}
|
|
// wire up promise resolution to callback
|
|
promiseToCallback(result)(callback)
|
|
}
|
|
}
|