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promisify.js
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promisify.js
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// jshint multistr:true, evil:true
"use strict";
var murmurhash = require('./index');
module.exports = function(promise) {
if (!promise) {
promise = global.Promise;
}
if ('function' !== typeof promise) {
throw new Error("Promise constructor required");
}
var promisify = function(object) {
var value, hash = {};
for(var name in object) {
if (object.hasOwnProperty(name)) {
if (!!(value = object[name])) {
switch(typeof value) {
case 'function':
hash[name + 'Async'] = wrap(promise, value);
break;
case 'object':
hash[name] = promisify(value);
break;
}
}
}
}
return hash;
};
return promisify(murmurhash);
};
function wrap(promise, fn) {
return new Function('Promise', 'slice', 'fn',
'return function ' + fn.name + 'Async() { \
var cb, args = slice.call(arguments); \
var promise = new Promise(function(resolve, reject) { \
cb = function(err, res) { \
if (err) reject(err); else { \
resolve(res); \
} \
}; \
}); \
args.push(cb); \
fn.apply(this, args); \
return promise; \
}')(promise, Array.prototype.slice, fn);
}