86 lines
2.2 KiB
JavaScript
86 lines
2.2 KiB
JavaScript
'use strict';
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const StringPrompt = require('./string');
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class NumberPrompt extends StringPrompt {
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constructor(options = {}) {
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super({ style: 'number', ...options });
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this.min = this.isValue(options.min) ? this.toNumber(options.min) : -Infinity;
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this.max = this.isValue(options.max) ? this.toNumber(options.max) : Infinity;
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this.delay = options.delay != null ? options.delay : 1000;
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this.float = options.float !== false;
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this.round = options.round === true || options.float === false;
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this.major = options.major || 10;
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this.minor = options.minor || 1;
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this.initial = options.initial != null ? options.initial : '';
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this.input = String(this.initial);
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this.cursor = this.input.length;
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this.cursorShow();
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}
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append(ch) {
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if (!/[-+.]/.test(ch) || (ch === '.' && this.input.includes('.'))) {
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return this.alert('invalid number');
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}
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return super.append(ch);
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}
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number(ch) {
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return super.append(ch);
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}
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next() {
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if (this.input && this.input !== this.initial) return this.alert();
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if (!this.isValue(this.initial)) return this.alert();
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this.input = this.initial;
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this.cursor = String(this.initial).length;
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return this.render();
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}
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up(number) {
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let step = number || this.minor;
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let num = this.toNumber(this.input);
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if (num > this.max + step) return this.alert();
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this.input = `${num + step}`;
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return this.render();
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}
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down(number) {
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let step = number || this.minor;
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let num = this.toNumber(this.input);
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if (num < this.min - step) return this.alert();
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this.input = `${num - step}`;
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return this.render();
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}
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shiftDown() {
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return this.down(this.major);
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}
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shiftUp() {
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return this.up(this.major);
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}
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format(input = this.input) {
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if (typeof this.options.format === 'function') {
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return this.options.format.call(this, input);
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}
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return this.styles.info(input);
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}
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toNumber(value = '') {
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return this.float ? +value : Math.round(+value);
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}
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isValue(value) {
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return /^[-+]?[0-9]+((\.)|(\.[0-9]+))?$/.test(value);
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}
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submit() {
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let value = [this.input, this.initial].find(v => this.isValue(v));
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this.value = this.toNumber(value || 0);
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return super.submit();
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}
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}
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module.exports = NumberPrompt;
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