我在使inquirer.js在我正在使用的简单CLI中顺利运行时遇到问题。首先，提示问题重复几次，并且需要解决。其次，我将代码编写为模块中的类，但无需在此处包含将其设为模块的代码，因此只需在下面包含类代码即可。在下面的代码中，我试图从inquirer.js提示符下访问用户选择的选项，但无法将用户选择的答案记录到控制台。我试图在这里编写一个类，这样我就可以在需要inquirer.js功能时随时实例化一个对象，并且只需更改某些属性以自定义提示即可。我还使用了几个额外的模块Colors.js和Shell.js，我非常感谢一些有知识的程序员的任何帮助，感谢您的帮助:)
到目前为止是我的代码：
/* See Examples Below To Test This Class */
const inquirer = require('inquirer');
const sh = require('shelljs');
const colors = require('./colors');
const color = colors.color;
// class to instantiate an inquirer prompt
class PromptQue {
constructor(pP) { // pP is an passed Object of params {key:value pairs}
this.pP = pP;
this.answer = undefined; // a class property to hold user's answer to prompt
this.clearTerm = false; // set true if need to clear user window after prompt
this.promptColor = color.tan; // assign a color to prompt question text from colors.js
this.statusBar = new inquirer.ui.BottomBar();
this.doStatusMsg = false; // set true if need to display status message
this.statusColor = color.warning; // assign a color to status message text from colors.js
this.statusMsg = undefined; // assign a status message
// this.choicesColor = color.offwhite;
// the switch below tests whether a normal Array
// or an Assoc Array Object was passed as answer 'choices'
switch(pP.hasOwnProperty('choices')) {
case true:
let testIfArray = Array.isArray(this.pP.choices);
if(!testIfArray) { // if not Array convert 'choices' object to array
this.pP.choices = this.GenArr(pP.choices);
}
case false:
break;
}
this.updateParams(); // call to set colors/styles on color enabled params
}
// ### !!! ----------------- DEBUG THIS! ------------------------------ >>>
// ### !!! Prompt() Method: Can't Get The Answer Returned !! ------ ###
// call Prompt() method to run the PromptQue instance
Prompt() {
return new Promise((resolve, reject) => {
// doStatusMsg is set true, display status message
this.checkStatusMsg();
inquirer.prompt([
this.pP // this is the Object Params passed to constructor
]).then((answer) => { // getting user's answer to prompt
this.answer = answer[this.pP.name];
return this.answer;
}).catch((err) => {console.log(err)});
})
.then(() => this.clearStatus())
.then(() => this.clear(this.clearTerm)); // if true : clear user window after prompt
}
> ```
// CONTINUING CODE :::::::::::
// ### !!! ----------------- DEBUG THIS! ------------------------------ >>>
showData() {
let keys = Object.keys(this.pP);
keys.forEach((key) => {
if(key === 'choices') {
let arr = this.pP['choices'];
let choicesStr = '';
let cntr = 0;
arr.forEach((val) => {
if(cntr < this.pP['choices'].length) {
choicesStr += `${val}, `;
} else {
choicesStr += `${val}`;
}
cntr++;
});
console.log(color.gray(`choices: ${choicesStr}`));
} else {
console.log(color.gray(`${key}: ${this.pP[key]}`));
}
});
console.log(color.gray(`clearTerm: ${this.clearTerm}`));
let C = this.promptColor('#COLOR');
console.log(color.gray(`promptColor: ${C}`));
console.log(color.gray(`statusMsg: ${this.statusMsg}`));
console.log(color.gray(`doStatusMsg ${this.doStatusMsg}`));
C = this.statusColor('#COLOR');
console.log(color.gray(`statusColor: ${C}`));
}
// function to convert object into regular array
GenArr(arr) {
let regArr = [];
for(var key in arr) {
var value = arr[key];
regArr.push(value);
}
return regArr;
}
// rebuilds colored enabled params with specified colors/styles
updateParams() {
let keys = Object.keys(this.pP);
keys.forEach((key) => {
switch (key) {
case 'message':
this.pP['message'] = this.promptColor(this.pP['message']);
break;
}
});
if(this.statusMsg) {
this.statusMsg = this.statusColor(this.statusMsg);
}
}
// displays a new message (msg) in the Status Bar
checkStatusMsg() {
if(this.doStatusMsg) {
let msg = `${this.statusColor.bold(this.statusMsg)}\n`;
this.setStatus(msg);
}
}
// Set a status message for the prompt
setStatus(msg) {
this.statusBar.updateBottomBar(msg);
// return msg;
}
// Clears the Status Bar's Field
clearStatus() {this.statusBar.updateBottomBar('')}
// Method to get user's selected choice for this prompt
getAnswer() {
return this.answer;
}
// console.log the user's selected choice for this prompt, mainly for debugging
logAnswer() {
if(this.answer !== undefined) {
console.log(color.ltgray.italic.bold(`User Choice: ${this.answer}`));
}
}
// function to clear user terminal screen
clear(bool) {
if(bool) {
sh.exec('clear');
}
}
}
/////*********** CODE-END ***********/////
//----------- Test Code Below ---------------------
/////**** TESTING ABOVE CODE ****/////
const sizeList = {0:'Jumbo',1:'Large',2:'Standard',3:'Medium',4:'Small',5:'Micro'};
// create an object to pass to new instance
// SETTING UP PROMPT HERE
let cPromptData = {
type: 'list',
message: color.tan('What size Pizza do you need?'),
name: 'pizza',
choices: sizeList
};
let cPrompt = new PromptQue(cPromptData);
cPrompt.statusMsg = 'Pizza! I Love Pizza!';
cPrompt.doStatusMsg = true;
// CALLING PROMPT
cPrompt.Prompt();
//-----------------------------------------------------
const myPromise = new Promise((resolve,reject) => {
cPrompt.Prompt();
}).then(() => console.log(`Selected: ${cPrompt.answer}`));
myPromise.then(() => console.log(`Selected: ${cPrompt.answer}`));
// TRYING TO ASSIGN USER'S ANSWER HERE AND LOG TO CONSOLE! *NOT WORKING
let ans = cPrompt.Prompt();
console.log(`Selected: ${ans}`);
这里是颜色模块代码：
const __MODULEINFO__ = {
package: 'lib',
name: 'colors',
sub: 'cli colors & styles',
context: 'Colors & Styles module that utilizes Chalk JS',
version: '1.0.0',
dependencies: ['chalk.js'],
}
exports.MODULEINFO = __MODULEINFO__;
/*//// Module Introspection Stuff - End ////*/
/////*********** CODE-START ***********/////
const chalk = require('chalk');
/* COLOR/STYLES INITIALIZE */
// white
const white = chalk.white;
// offwhite
const offwhite = chalk.hex('#f2f2d9');
// blue
const blue = chalk.hex('#0033ff');
// tan
const tan = chalk.hex('#cca26c');
// green
const green = chalk.hex('#009900');
// ltgray
const ltgray = chalk.hex('#d9d9d9');
// gray
const gray = chalk.hex('#808080');
// error
const alert = chalk.hex('#ff0000');
// warning
const warning = chalk.hex('#ff5c00');
//* ** COLOR-STYLES ** *//
const color = {
white: white,
blue: blue,
tan: tan,
green: green,
ltgray: ltgray,
gray: gray,
alert: alert,
warning: warning,
}
exports.color = color;
/////*********** CODE-END ***********/////
/* ***** DEV NOTES ***** /*
// NEEDS MORE WORK!
// add any of these colors/styles or add custom ones:
// turqoise
turq: chalk.hex('#02B388');
bgturq: chalk.whiteBright.bgHex('#00624F');
// info: blue
info: chalk.hex('#0092ff');
bginfo: chalk.white.bgHex('#285095');
// warning: orange
warn: chalk.hex('#ff8700');
bgwarn: chalk.whiteBright.bgHex('#ce6d00');
// error: red
error: chalk.hex('#ff0000');
bgerror: chalk.whiteBright.bgHex('#eb0000');
// dim: grey
grey: chalk.hex('#a1a1a1');
bggrey: chalk.hex('#a1a1a1').bgHex('#2d2d2d');
// dim: tan
tan: tan = chalk.hex('#cca26c');
bgtan: chalk.hex('#cca26c').bgHex('#3b2b1c');
// yellow
yellow: chalk.hex('#fff500');
bgyellow: chalk.whiteBright.bgHex('#e6c200');
// dark
dark: chalk.hex('#000000');
bgdark: chalk.hex('#000000').bgHex('#747474');
darkbold: chalk.hex('#000000').bold;
bgdarkbold: chalk.hex('#000000').bgHex('#747474').bold;
// red bold
redbold: chalk.red.bold;
// red italic
reditalic: chalk.red.italic;
// red underline
redul: chalk.red.underline;
// red strike
redstrike: chalk.red.strikethrough;
// red dim
reddim: chalk.red.dim;
// blue
blue: chalk.blue;
// blue bold
bluebold: chalk.blue.bold;
// blue dim
bluedim: chalk.blue.dim;
// blue italic
blueitalic: chalk.blue.italic;
// green
green: chalk.green;
// green bold
greenbold: chalk.green.bold;
// green dim
greendim: chalk.green.dim;
// green italic
greenitalic: chalk.green.italic;
// TEXT-STYLES //
// bold text
bold: chalk.bold;
// dim text
dim: chalk.dim;
// italic text
italic: chalk.italic;
// underline
ul: chalk.underline;
// inverse - invert bg and fg
invert: chalk.inverse;
// strikethrough
strike: chalk.strikethrough;
// bold italic
bolditalic: chalk.bold.italic;
// bold dim
bolddim: chalk.bold.dim;
// dim italic
dimitalic: chalk.dim.italic;
// dim underline
dimul: chalk.dim.underline;
// italic underline
italicul: chalk.italic.underline;
;-----
*/
/* Create project directory called 'inquirtest-cli' and CD to it then/n in terminal run 'npm init' overwrite package.json created with the/n below package.json, then create a sub-directory called bin in your/n project directory, then create a main file 'inquirtest.js', then in /nproject directory run 'sudo npm link' which will enable you to just type/n 'inq' in terminal at any directory and it will run the main code. /npackage.json content: */
// package.json
{
"name": "inquirtest",
"version": "1.0.0",
"description": "",
"main": "index.js",
"bin": {
"inq": "./bin/inquirtest.js"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "robogenus",
"license": "MIT",
"dependencies": {
"colors": "^1.4.0",
"commander": "^5.1.0",
"inquirer": "^7.1.0"
}
}
// inquirtest.js
#!/usr/bin/env node
const inquirer = require('inquirer');
const colors = require('colors');
const doPrompts = () => {
const ques = [
{
type: 'input',
name: 'fullname',
message: 'What is your name? '.yellow
},
{
type: 'list',
name: 'gender',
message: 'Select your gender: '.yellow,
choices: ['Male', 'Female']
}
];
return inquirer.prompt(ques);
};
const run = async () => {
const answers = await doPrompts();
const { fullname, gender } = answers;
console.log(`Hi there ${fullname}! Hmm?... So you are ${gender} type gender.`);
};