You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
3.2 KiB
144 lines
3.2 KiB
'use strict';
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const color = require('kleur');
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const Prompt = require('./prompt');
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const { cursor } = require('sisteransi');
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const { clear, figures, style } = require('../util');
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/**
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* MultiselectPrompt 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.cursor=0] Cursor start position
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* @param {Number} [opts.max] Max choices
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*/
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class MultiselectPrompt 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.cursor = opts.cursor || 0;
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this.hint = opts.hint || '- Space to select. Return to submit';
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this.maxChoices = opts.max;
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this.value = opts.choices.map(v => Object.assign({ title: v.value, selected: false }, v));
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this.clear = clear('');
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this.render(true);
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}
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reset() {
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this.value.map(v => !v.selected);
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this.cursor = 0;
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this.fire();
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this.render();
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}
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selected() {
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return this.value.filter(v => v.selected);
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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.cursor = 0;
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this.render();
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}
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last() {
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this.cursor = this.value.length - 1;
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this.render();
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}
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next() {
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this.cursor = (this.cursor + 1) % this.value.length;
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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.cursor--;
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this.render();
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}
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down() {
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if (this.cursor === this.value.length - 1) return this.bell();
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this.cursor++;
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this.render();
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}
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left() {
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this.value[this.cursor].selected = false;
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this.render();
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}
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right() {
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if (this.value.filter(e => e.selected).length >= this.maxChoices) return this.bell();
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this.value[this.cursor].selected = true;
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this.render();
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}
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_(c, key) {
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if (c !== ' ') return this.bell();
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const v = this.value[this.cursor];
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if (v.selected) {
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v.selected = false;
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this.render();
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} else if (this.value.filter(e => e.selected).length >= this.maxChoices) {
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return this.bell();
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} else {
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v.selected = true;
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this.render();
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}
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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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// print prompt
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const selected = this.value
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.filter(e => e.selected)
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.map(v => v.title)
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.join(', ');
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let prompt = [
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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 ? selected : color.gray(this.hint)
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].join(' ');
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// print choices
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if (!this.done) {
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const c = this.cursor;
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prompt +=
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'\n' +
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this.value
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.map(
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(v, i) =>
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(v.selected ? color.green(figures.tick) : ' ') +
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' ' +
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(c === i ? color.cyan.underline(v.title) : v.title)
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)
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.join('\n');
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}
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this.out.write(this.clear + prompt);
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this.clear = clear(prompt);
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}
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}
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module.exports = MultiselectPrompt;
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