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index.js
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index.js
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'use strict';
const chalkPipe = require('chalk-pipe');
const Base = require('inquirer/lib/prompts/base');
const observe = require('inquirer/lib/utils/events');
class ChalkPipePrompt extends Base {
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
_run(cb) {
this.done = cb;
// Once user confirm (enter key)
const events = observe(this.rl);
const submit = events.line.map(this.filterInput.bind(this));
const validation = this.handleSubmitEvents(submit);
validation.success.forEach(this.onEnd.bind(this));
validation.error.forEach(this.onError.bind(this));
events.keypress.takeUntil(validation.success).forEach(this.onKeypress.bind(this));
// Init
this.render();
return this;
}
/**
* Render the prompt to screen
* @return {InputPrompt} self
*/
render(error) {
let bottomContent = '';
let message = this.getQuestion();
if (this.status === 'answered') {
message += chalkPipe(this.answer)(this.answer);
} else {
message += chalkPipe(this.rl.line)(this.rl.line);
}
if (error) {
bottomContent = chalkPipe('red')('>> ') + error;
}
this.screen.render(message, bottomContent);
}
/**
* When user press `enter` key
*/
filterInput(input) {
if (!input) {
return this.opt.default === null ? '' : this.opt.default;
}
return input;
}
onEnd(state) {
this.answer = state.value;
this.status = 'answered';
// Re-render prompt
this.render();
this.screen.done();
this.done(state.value);
}
onError(state) {
this.render(state.isValid);
}
/**
* When user press a key
*/
onKeypress() {
this.render();
}
}
module.exports = ChalkPipePrompt;