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'use strict';
var _ = require('lodash');
var rx = require('rx-lite-aggregates');
var runAsync = require('run-async');
/**
* Resolve a question property value if it is passed as a function.
* This method will overwrite the property on the question object with the received value.
* @param {Object} question - Question object
* @param {String} prop - Property to fetch name
* @param {Object} answers - Answers object
* @return {rx.Obsersable} - Observable emitting once value is known
*/
exports.fetchAsyncQuestionProperty = function (question, prop, answers) {
if (!_.isFunction(question[prop])) {
return rx.Observable.return(question);
}
return rx.Observable.fromPromise(runAsync(question[prop])(answers)
.then(function (value) {
question[prop] = value;
return question;
})
);
};
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