forked from zhurui/management
116 lines
3.2 KiB
JavaScript
116 lines
3.2 KiB
JavaScript
'use strict';
|
|
var _ = require('lodash');
|
|
var rx = require('rx-lite-aggregates');
|
|
var util = require('util');
|
|
var runAsync = require('run-async');
|
|
var utils = require('../utils/utils');
|
|
var Base = require('./baseUI');
|
|
|
|
/**
|
|
* Base interface class other can inherits from
|
|
*/
|
|
|
|
var PromptUI = module.exports = function (prompts, opt) {
|
|
Base.call(this, opt);
|
|
this.prompts = prompts;
|
|
};
|
|
util.inherits(PromptUI, Base);
|
|
|
|
PromptUI.prototype.run = function (questions) {
|
|
// Keep global reference to the answers
|
|
this.answers = {};
|
|
|
|
// Make sure questions is an array.
|
|
if (_.isPlainObject(questions)) {
|
|
questions = [questions];
|
|
}
|
|
|
|
// Create an observable, unless we received one as parameter.
|
|
// Note: As this is a public interface, we cannot do an instanceof check as we won't
|
|
// be using the exact same object in memory.
|
|
var obs = _.isArray(questions) ? rx.Observable.from(questions) : questions;
|
|
|
|
this.process = obs
|
|
.concatMap(this.processQuestion.bind(this))
|
|
// `publish` creates a hot Observable. It prevents duplicating prompts.
|
|
.publish();
|
|
|
|
this.process.connect();
|
|
|
|
return this.process
|
|
.reduce(function (answers, answer) {
|
|
_.set(this.answers, answer.name, answer.answer);
|
|
return this.answers;
|
|
}.bind(this), {})
|
|
.toPromise(Promise)
|
|
.then(this.onCompletion.bind(this));
|
|
};
|
|
|
|
/**
|
|
* Once all prompt are over
|
|
*/
|
|
|
|
PromptUI.prototype.onCompletion = function (answers) {
|
|
this.close();
|
|
|
|
return answers;
|
|
};
|
|
|
|
PromptUI.prototype.processQuestion = function (question) {
|
|
question = _.clone(question);
|
|
return rx.Observable.defer(function () {
|
|
var obs = rx.Observable.of(question);
|
|
|
|
return obs
|
|
.concatMap(this.setDefaultType.bind(this))
|
|
.concatMap(this.filterIfRunnable.bind(this))
|
|
.concatMap(utils.fetchAsyncQuestionProperty.bind(null, question, 'message', this.answers))
|
|
.concatMap(utils.fetchAsyncQuestionProperty.bind(null, question, 'default', this.answers))
|
|
.concatMap(utils.fetchAsyncQuestionProperty.bind(null, question, 'choices', this.answers))
|
|
.concatMap(this.fetchAnswer.bind(this));
|
|
}.bind(this));
|
|
};
|
|
|
|
PromptUI.prototype.fetchAnswer = function (question) {
|
|
var Prompt = this.prompts[question.type];
|
|
this.activePrompt = new Prompt(question, this.rl, this.answers);
|
|
return rx.Observable.defer(function () {
|
|
return rx.Observable.fromPromise(this.activePrompt.run().then(function (answer) {
|
|
return {name: question.name, answer: answer};
|
|
}));
|
|
}.bind(this));
|
|
};
|
|
|
|
PromptUI.prototype.setDefaultType = function (question) {
|
|
// Default type to input
|
|
if (!this.prompts[question.type]) {
|
|
question.type = 'input';
|
|
}
|
|
return rx.Observable.defer(function () {
|
|
return rx.Observable.return(question);
|
|
});
|
|
};
|
|
|
|
PromptUI.prototype.filterIfRunnable = function (question) {
|
|
if (question.when === false) {
|
|
return rx.Observable.empty();
|
|
}
|
|
|
|
if (!_.isFunction(question.when)) {
|
|
return rx.Observable.return(question);
|
|
}
|
|
|
|
var answers = this.answers;
|
|
return rx.Observable.defer(function () {
|
|
return rx.Observable.fromPromise(
|
|
runAsync(question.when)(answers).then(function (shouldRun) {
|
|
if (shouldRun) {
|
|
return question;
|
|
}
|
|
})
|
|
).filter(function (val) {
|
|
return val != null;
|
|
});
|
|
});
|
|
};
|