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date.js
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Tue, Feb 11, 05:05

date.js
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'use strict';
const color = require('kleur');
const Prompt = require('./prompt');
const { style, clear, figures } = require('../util');
const { erase, cursor } = require('sisteransi');
const { DatePart, Meridiem, Day, Hours, Milliseconds, Minutes, Month, Seconds, Year } = require('../dateparts');
const regex = /\\(.)|"((?:\\["\\]|[^"])+)"|(D[Do]?|d{3,4}|d)|(M{1,4})|(YY(?:YY)?)|([aA])|([Hh]{1,2})|(m{1,2})|(s{1,2})|(S{1,4})|./g;
const regexGroups = {
1: ({token}) => token.replace(/\\(.)/g, '$1'),
2: (opts) => new Day(opts), // Day // TODO
3: (opts) => new Month(opts), // Month
4: (opts) => new Year(opts), // Year
5: (opts) => new Meridiem(opts), // AM/PM // TODO (special)
6: (opts) => new Hours(opts), // Hours
7: (opts) => new Minutes(opts), // Minutes
8: (opts) => new Seconds(opts), // Seconds
9: (opts) => new Milliseconds(opts), // Fractional seconds
}
const dfltLocales = {
months: 'January,February,March,April,May,June,July,August,September,October,November,December'.split(','),
monthsShort: 'Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec'.split(','),
weekdays: 'Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday'.split(','),
weekdaysShort: 'Sun,Mon,Tue,Wed,Thu,Fri,Sat'.split(',')
}
/**
* DatePrompt Base Element
* @param {Object} opts Options
* @param {String} opts.message Message
* @param {Number} [opts.initial] Index of default value
* @param {String} [opts.mask] The format mask
* @param {object} [opts.locales] The date locales
* @param {String} [opts.error] The error message shown on invalid value
* @param {Function} [opts.validate] Function to validate the submitted value
* @param {Stream} [opts.stdin] The Readable stream to listen to
* @param {Stream} [opts.stdout] The Writable stream to write readline data to
*/
class DatePrompt extends Prompt {
constructor(opts={}) {
super(opts);
this.msg = opts.message;
this.cursor = 0;
this.typed = '';
this.locales = Object.assign(dfltLocales, opts.locales);
this._date = opts.initial || new Date();
this.errorMsg = opts.error || 'Please Enter A Valid Value';
this.validator = opts.validate || (() => true);
this.mask = opts.mask || 'YYYY-MM-DD HH:mm:ss';
this.clear = clear('', this.out.columns);
this.render();
}
get value() {
return this.date
}
get date() {
return this._date;
}
set date(date) {
if (date) this._date.setTime(date.getTime());
}
set mask(mask) {
let result;
this.parts = [];
while(result = regex.exec(mask)) {
let match = result.shift();
let idx = result.findIndex(gr => gr != null);
this.parts.push(idx in regexGroups
? regexGroups[idx]({ token: result[idx] || match, date: this.date, parts: this.parts, locales: this.locales })
: result[idx] || match);
}
let parts = this.parts.reduce((arr, i) => {
if (typeof i === 'string' && typeof arr[arr.length - 1] === 'string')
arr[arr.length - 1] += i;
else arr.push(i);
return arr;
}, []);
this.parts.splice(0);
this.parts.push(...parts);
this.reset();
}
moveCursor(n) {
this.typed = '';
this.cursor = n;
this.fire();
}
reset() {
this.moveCursor(this.parts.findIndex(p => p instanceof DatePart));
this.fire();
this.render();
}
exit() {
this.abort();
}
abort() {
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;
}
this.done = true;
this.aborted = false;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
up() {
this.typed = '';
this.parts[this.cursor].up();
this.render();
}
down() {
this.typed = '';
this.parts[this.cursor].down();
this.render();
}
left() {
let prev = this.parts[this.cursor].prev();
if (prev == null) return this.bell();
this.moveCursor(this.parts.indexOf(prev));
this.render();
}
right() {
let next = this.parts[this.cursor].next();
if (next == null) return this.bell();
this.moveCursor(this.parts.indexOf(next));
this.render();
}
next() {
let next = this.parts[this.cursor].next();
this.moveCursor(next
? this.parts.indexOf(next)
: this.parts.findIndex((part) => part instanceof DatePart));
this.render();
}
_(c) {
if (/\d/.test(c)) {
this.typed += c;
this.parts[this.cursor].setTo(this.typed);
this.render();
}
}
render() {
if (this.closed) return;
if (this.firstRender) this.out.write(cursor.hide);
else this.out.write(clear(this.outputText, this.out.columns));
super.render();
// Print prompt
this.outputText = [
style.symbol(this.done, this.aborted),
color.bold(this.msg),
style.delimiter(false),
this.parts.reduce((arr, p, idx) => arr.concat(idx === this.cursor && !this.done ? color.cyan().underline(p.toString()) : p), [])
.join('')
].join(' ');
// Print error
if (this.error) {
this.outputText += this.errorMsg.split('\n').reduce(
(a, l, i) => a + `\n${i ? ` ` : figures.pointerSmall} ${color.red().italic(l)}`, ``);
}
this.out.write(erase.line + cursor.to(0) + this.outputText);
}
}
module.exports = DatePrompt;

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