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cli.js
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cli.js
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'use strict';
const ora = require('ora');
const chalk = require('chalk');
const inquirer = require('inquirer');
const { warning, error, info, success } = require('./figures');
const SPINNER_STATUS = {
SUCCESS: 'success',
FAILED: 'failed',
WARN: 'warn',
INFO: 'info'
};
const { SUCCESS, FAILED, WARN, INFO } = SPINNER_STATUS;
const QUESTION_TYPE = {
INPUT: 'input',
NUMBER: 'number',
CONFIRM: 'confirm'
};
function head(text, length = 11) {
return chalk.bold(text.padEnd(length));
}
class CLI {
constructor(stream) {
this.stream = stream || process.stderr;
this.spinner = ora({ stream: this.stream });
this.SPINNER_STATUS = SPINNER_STATUS;
this.QUESTION_TYPE = QUESTION_TYPE;
this.figureIndent = ' ';
this.assumeYes = false;
}
get eolIndent() {
return `\n${this.figureIndent}`;
}
setFigureIndent(indent) {
this.figureIndent = ' '.repeat(indent);
}
async prompt(question, opts = {
defaultAnswer: true,
noSeparator: false,
questionType: 'confirm'
}) {
if (!opts.noSeparator) {
this.separator();
}
const questionType = opts.questionType || QUESTION_TYPE.CONFIRM;
const availableTypes = Object.values(QUESTION_TYPE);
if (!availableTypes.includes(questionType)) {
throw new Error(
`${questionType} must be one of ${availableTypes.join(', ')}`);
}
const defaultAnswer = (opts.defaultAnswer === undefined)
? true
: opts.defaultAnswer;
if (typeof defaultAnswer === 'boolean' &&
questionType !== QUESTION_TYPE.CONFIRM) {
throw new Error(
'defaultAnswer must be provided for non-confirmation prompts');
}
if (this.assumeYes) {
return defaultAnswer;
}
const { answer } = await inquirer.prompt([{
type: questionType,
name: 'answer',
message: question,
default: defaultAnswer
}]);
return answer;
}
setAssumeYes() {
this.assumeYes = true;
}
startSpinner(text) {
this.spinner.text = text;
this.spinner.start();
}
updateSpinner(text) {
this.spinner.text = text;
}
stopSpinner(rawText, status = SUCCESS) {
let symbol;
if (status === SUCCESS) {
symbol = success;
} else if (status === FAILED) {
symbol = error;
} else if (status === WARN) {
symbol = warning;
} else if (status === INFO) {
symbol = info;
}
const text = ' ' + rawText;
this.spinner.stopAndPersist({
symbol, text
});
}
write(text) {
this.stream.write(text);
}
log(text) {
this.write(text + '\n');
}
table(first, second = '', length = 11) {
this.log(head(first, length) + second);
}
separator(text = '', length = 80, sep = '-') {
if (!text) {
this.log(sep.repeat(length));
return;
}
const rest = (length - text.length - 2);
const half = sep.repeat(Math.abs(Math.floor(rest / 2)));
if (rest % 2 === 0) {
this.log(`${half} ${chalk.bold(text)} ${half}`);
} else {
this.log(`${half} ${chalk.bold(text)} ${sep}${half}`);
}
}
ok(text, options = {}) {
const prefix = options.newline ? this.eolIndent : this.figureIndent;
this.log(`${prefix}${success} ${text}`);
}
warn(text, options = {}) {
const prefix = options.newline ? this.eolIndent : this.figureIndent;
this.log(prefix + chalk.bold(`${warning} ${text}`));
}
info(text, options = {}) {
const prefix = options.newline ? this.eolIndent : this.figureIndent;
this.log(`${prefix}${info} ${text}`);
}
error(obj, options = {}) {
const prefix = options.newline ? this.eolIndent : this.figureIndent;
if (obj instanceof Error) {
this.log(`${prefix}${error} ${obj.message}`);
this.log(`${obj.stack}`);
if (obj.data) {
this.log(`${JSON.stringify(obj.data, null, 2)}`);
}
} else {
this.log(prefix + chalk.bold(`${error} ${obj}`));
}
}
setExitCode(statusCode) {
process.exitCode = statusCode;
}
};
CLI.SPINNER_STATUS = SPINNER_STATUS;
CLI.QUESTION_TYPE = QUESTION_TYPE;
module.exports = CLI;