119 lines
2.6 KiB
JavaScript
119 lines
2.6 KiB
JavaScript
'use strict';
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const color = require('kleur');
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const Prompt = require('./prompt');
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const { style, clear, figures } = require('../util');
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const { erase, cursor } = require('sisteransi');
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/**
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* SelectPrompt Base Element
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* @param {Object} opts Options
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* @param {String} opts.message Message
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* @param {Array} opts.choices Array of choice objects
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* @param {String} [opts.hint] Hint to display
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* @param {Number} [opts.initial] Index of default value
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*/
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class SelectPrompt extends Prompt {
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constructor(opts={}) {
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super(opts);
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this.msg = opts.message;
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this.hint = opts.hint || '- Use arrow-keys. Return to submit.';
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this.cursor = opts.initial || 0;
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this.values = opts.choices || [];
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this.value = opts.choices[this.cursor].value;
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this.clear = clear('');
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this.render(true);
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}
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moveCursor(n) {
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this.cursor = n;
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this.value = this.values[n].value;
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this.fire();
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}
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reset() {
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this.moveCursor(0);
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this.fire();
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this.render();
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}
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abort() {
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this.done = this.aborted = true;
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this.fire();
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this.render();
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this.out.write('\n');
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this.close();
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}
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submit() {
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this.done = true;
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this.aborted = false;
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this.fire();
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this.render();
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this.out.write('\n');
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this.close();
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}
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first() {
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this.moveCursor(0);
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this.render();
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}
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last() {
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this.moveCursor(this.values.length - 1);
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this.render();
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}
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up() {
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if (this.cursor === 0) return this.bell();
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this.moveCursor(this.cursor - 1);
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this.render();
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}
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down() {
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if (this.cursor === this.values.length - 1) return this.bell();
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this.moveCursor(this.cursor + 1);
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this.render();
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}
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next() {
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this.moveCursor((this.cursor + 1) % this.values.length);
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this.render();
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}
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_(c, key) {
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if (c === ' ') return this.submit();
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}
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render(first) {
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if (first) this.out.write(cursor.hide);
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else this.out.write(erase.lines(this.values.length + 1));
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// Print prompt
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this.out.write(
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[
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style.symbol(this.done, this.aborted),
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color.bold(this.msg),
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style.delimiter(false),
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this.done ? this.values[this.cursor].title : color.gray(this.hint)
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].join(' ')
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);
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// Print choices
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if (!this.done) {
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this.out.write(
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'\n' +
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this.values
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.map((v, i) => {
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let title = this.cursor === i ? color.cyan.underline(v.title) : v.title;
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let prefix = this.cursor === i ? color.cyan(figures.pointer) + ' ' : ' ';
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return `${prefix} ${title}`;
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})
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.join('\n')
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);
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}
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}
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}
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module.exports = SelectPrompt;
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