You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.1 KiB
45 lines
1.1 KiB
let Promise = global.Promise; |
|
|
|
/// encapsulate a method with a node-style callback in a Promise |
|
/// @param {object} 'this' of the encapsulated function |
|
/// @param {function} function to be encapsulated |
|
/// @param {Array-like} args to be passed to the called function |
|
/// @return {Promise} a Promise encapsulating the function |
|
function promise(fn, context, args) { |
|
if (!Array.isArray(args)) { |
|
args = Array.prototype.slice.call(args); |
|
} |
|
|
|
if (typeof fn !== 'function') { |
|
return Promise.reject(new Error('fn must be a function')); |
|
} |
|
|
|
return new Promise((resolve, reject) => { |
|
args.push((err, data) => { |
|
if (err) { |
|
reject(err); |
|
} else { |
|
resolve(data); |
|
} |
|
}); |
|
|
|
fn.apply(context, args); |
|
}); |
|
} |
|
|
|
/// @param {err} the error to be thrown |
|
function reject(err) { |
|
return Promise.reject(err); |
|
} |
|
|
|
/// changes the promise implementation that bcrypt uses |
|
/// @param {Promise} the implementation to use |
|
function use(promise) { |
|
Promise = promise; |
|
} |
|
|
|
module.exports = { |
|
promise, |
|
reject, |
|
use |
|
}
|
|
|