30 lines
763 B
TypeScript
30 lines
763 B
TypeScript
|
|
/**
|
|
* Helper function to convert callbacks into promises
|
|
* @param func
|
|
*/
|
|
export default function callbackify(func: (...args: any[]) => Promise<any>): Function {
|
|
return (...args: any[]) => {
|
|
const onlyArgs: any[] = [];
|
|
let maybeCallback: Function | null = null;
|
|
|
|
for (const arg of args) {
|
|
if (typeof arg === 'function') {
|
|
maybeCallback = arg;
|
|
break;
|
|
}
|
|
|
|
onlyArgs.push(arg);
|
|
}
|
|
|
|
if (!maybeCallback) {
|
|
throw new Error("Missing callback parameter!");
|
|
}
|
|
|
|
const callback = maybeCallback;
|
|
|
|
func(...onlyArgs)
|
|
.then((data: any) => callback(null, data))
|
|
.catch((err: any) => callback(err))
|
|
}
|
|
} |