const color = require('kleur'); const Prompt = require('./prompt'); const { cursor, erase } = require('sisteransi'); const { style, clear, figures, strip } = require('../util'); const isNumber = /[0-9]/; const isDef = any => any !== undefined; const round = (number, precision) => { let factor = Math.pow(10, precision); return Math.round(number * factor) / factor; } /** * NumberPrompt Base Element * @param {Object} opts Options * @param {String} opts.message Message * @param {String} [opts.style='default'] Render style * @param {Number} [opts.initial] Default value * @param {Number} [opts.max=+Infinity] Max value * @param {Number} [opts.min=-Infinity] Min value * @param {Boolean} [opts.float=false] Parse input as floats * @param {Number} [opts.round=2] Round floats to x decimals * @param {Number} [opts.increment=1] Number to increment by when using arrow-keys * @param {Function} [opts.validate] Validate function * @param {Stream} [opts.stdin] The Readable stream to listen to * @param {Stream} [opts.stdout] The Writable stream to write readline data to * @param {String} [opts.error] The invalid error label */ class NumberPrompt extends Prompt { constructor(opts={}) { super(opts); this.transform = style.render(opts.style); this.msg = opts.message; this.initial = isDef(opts.initial) ? opts.initial : ''; this.float = !!opts.float; this.round = opts.round || 2; this.inc = opts.increment || 1; this.min = isDef(opts.min) ? opts.min : -Infinity; this.max = isDef(opts.max) ? opts.max : Infinity; this.errorMsg = opts.error || `Please Enter A Valid Value`; this.validator = opts.validate || (() => true); this.color = `cyan`; this.value = ``; this.typed = ``; this.lastHit = 0; this.render(); } set value(v) { if (!v && v !== 0) { this.placeholder = true; this.rendered = color.gray(this.transform.render(`${this.initial}`)); this._value = ``; } else { this.placeholder = false; this.rendered = this.transform.render(`${round(v, this.round)}`); this._value = round(v, this.round); } this.fire(); } get value() { return this._value; } parse(x) { return this.float ? parseFloat(x) : parseInt(x); } valid(c) { return c === `-` || c === `.` && this.float || isNumber.test(c) } reset() { this.typed = ``; this.value = ``; this.fire(); this.render(); } abort() { let x = this.value; this.value = x !== `` ? x : this.initial; this.done = this.aborted = true; this.error = false; this.fire(); this.render(); this.out.write(`\n`); this.close(); } async validate() { let valid = await this.validator(this.value); if (typeof valid === `string`) { this.errorMsg = valid; valid = false; } this.error = !valid; } async submit() { await this.validate(); if (this.error) { this.color = `red`; this.fire(); this.render(); return; } let x = this.value; this.value = x !== `` ? x : this.initial; this.done = true; this.aborted = false; this.error = false; this.fire(); this.render(); this.out.write(`\n`); this.close(); } up() { this.typed = ``; if (this.value >= this.max) return this.bell(); this.value += this.inc; this.color = `cyan`; this.fire(); this.render(); } down() { this.typed = ``; if (this.value <= this.min) return this.bell(); this.value -= this.inc; this.color = `cyan`; this.fire(); this.render(); } delete() { let val = this.value.toString(); if (val.length === 0) return this.bell(); this.value = this.parse((val = val.slice(0, -1))) || ``; this.color = `cyan`; this.fire(); this.render(); } next() { this.value = this.initial; this.fire(); this.render(); } _(c, key) { if (!this.valid(c)) return this.bell(); const now = Date.now(); if (now - this.lastHit > 1000) this.typed = ``; // 1s elapsed this.typed += c; this.lastHit = now; this.color = `cyan`; if (c === `.`) return this.fire(); this.value = Math.min(this.parse(this.typed), this.max); if (this.value > this.max) this.value = this.max; if (this.value < this.min) this.value = this.min; this.fire(); this.render(); } render() { if (this.closed) return; super.render(); let clear = erase.line + (this.lines ? erase.down(this.lines) : ``) + cursor.to(0); this.lines = 0; let error = ``; if (this.error) { let lines = this.errorMsg.split(`\n`); error += lines.reduce((a, l, i) => a + `\n${i ? ` ` : figures.pointerSmall} ${color.red().italic(l)}`, ``); this.lines = lines.length; } let underline = !this.done || (!this.done && !this.placeholder); let prompt = [ style.symbol(this.done, this.aborted), color.bold(this.msg), style.delimiter(this.done), underline ? color[this.color]().underline(this.rendered) : this.rendered ].join(` `); let position = ``; if (this.lines) { position += cursor.up(this.lines); position += cursor.left+cursor.to(strip(prompt).length); } this.out.write(clear+prompt+error+position); } } module.exports = NumberPrompt;