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'use strict';
const color = require('kleur');
const Prompt = require('./prompt');
const { cursor } = require('sisteransi');
const { clear, figures, style } = require('../util');
/**
* MultiselectPrompt Base Element
* @param {Object} opts Options
* @param {String} opts.message Message
* @param {Array} opts.choices Array of choice objects
* @param {String} [opts.hint] Hint to display
* @param {Number} [opts.cursor=0] Cursor start position
* @param {Number} [opts.max] Max choices
*/
class MultiselectPrompt extends Prompt {
constructor(opts={}) {
super(opts);
this.msg = opts.message;
this.cursor = opts.cursor || 0;
this.hint = opts.hint || '- Space to select. Return to submit';
this.maxChoices = opts.max;
this.value = opts.choices.map(v => Object.assign({ title: v.value, selected: false }, v));
this.clear = clear('');
this.render(true);
}
reset() {
this.value.map(v => !v.selected);
this.cursor = 0;
this.fire();
this.render();
}
selected() {
return this.value.filter(v => v.selected);
}
abort() {
this.done = this.aborted = true;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
submit() {
this.done = true;
this.aborted = false;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
first() {
this.cursor = 0;
this.render();
}
last() {
this.cursor = this.value.length - 1;
this.render();
}
next() {
this.cursor = (this.cursor + 1) % this.value.length;
this.render();
}
up() {
if (this.cursor === 0) return this.bell();
this.cursor--;
this.render();
}
down() {
if (this.cursor === this.value.length - 1) return this.bell();
this.cursor++;
this.render();
}
left() {
this.value[this.cursor].selected = false;
this.render();
}
right() {
if (this.value.filter(e => e.selected).length >= this.maxChoices) return this.bell();
this.value[this.cursor].selected = true;
this.render();
}
_(c, key) {
if (c !== ' ') return this.bell();
const v = this.value[this.cursor];
if (v.selected) {
v.selected = false;
this.render();
} else if (this.value.filter(e => e.selected).length >= this.maxChoices) {
return this.bell();
} else {
v.selected = true;
this.render();
}
}
render(first) {
if (first) this.out.write(cursor.hide);
// print prompt
const selected = this.value
.filter(e => e.selected)
.map(v => v.title)
.join(', ');
let prompt = [
style.symbol(this.done, this.aborted),
color.bold(this.msg),
style.delimiter(false),
this.done ? selected : color.gray(this.hint)
].join(' ');
// print choices
if (!this.done) {
const c = this.cursor;
prompt +=
'\n' +
this.value
.map(
(v, i) =>
(v.selected ? color.green(figures.tick) : ' ') +
' ' +
(c === i ? color.cyan.underline(v.title) : v.title)
)
.join('\n');
}
this.out.write(this.clear + prompt);
this.clear = clear(prompt);
}
}
module.exports = MultiselectPrompt;