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var _ = require("underscore");
var bluebird = require("bluebird/js/release/promise")();
exports.defer = defer;
exports.resolve = bluebird.resolve;
exports.reject = bluebird.reject;
exports.mapSeries = bluebird.mapSeries;
var props = exports.props = function(obj) {
// We rely on .keys() and .values() returning properties in the same order.
var keys = Object.keys(obj);
var values = Object.values(obj);
var result = bluebird.all(values).then(function(resolvedValues) {
var resolvedObj = {};
for (var index = 0; index < keys.length; index++) {
resolvedObj[keys[index]] = resolvedValues[index];
}
return resolvedObj;
});
return addAlsoToPromise(result);
};
function addAlsoToPromise(promise) {
promise.also = function(func) {
var result = this.then(function(value) {
var returnValue = _.extend({}, value, func(value));
return props(returnValue);
});
return addAlsoToPromise(result);
};
return promise;
}
exports.try = function(func) {
try {
return bluebird.resolve(func());
} catch (error) {
return bluebird.reject(error);
}
};
bluebird.prototype.also = function(func) {
return this.then(function(value) {
var returnValue = _.extend({}, value, func(value));
return bluebird.props(returnValue);
});
};
function defer() {
var resolve;
var reject;
var promise = new bluebird.Promise(function(resolveArg, rejectArg) {
resolve = resolveArg;
reject = rejectArg;
});
return {
resolve: resolve,
reject: reject,
promise: promise
};
}
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