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text.js
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Mon, Feb 10, 20:19

text.js
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"use strict";
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
const color = require('kleur');
const Prompt = require('./prompt');
const _require = require('sisteransi'),
erase = _require.erase,
cursor = _require.cursor;
const _require2 = require('../util'),
style = _require2.style,
clear = _require2.clear,
lines = _require2.lines,
figures = _require2.figures;
/**
* TextPrompt Base Element
* @param {Object} opts Options
* @param {String} opts.message Message
* @param {String} [opts.style='default'] Render style
* @param {String} [opts.initial] Default value
* @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 TextPrompt extends Prompt {
constructor(opts = {}) {
super(opts);
this.transform = style.render(opts.style);
this.scale = this.transform.scale;
this.msg = opts.message;
this.initial = opts.initial || ``;
this.validator = opts.validate || (() => true);
this.value = ``;
this.errorMsg = opts.error || `Please Enter A Valid Value`;
this.cursor = Number(!!this.initial);
this.cursorOffset = 0;
this.clear = clear(``, this.out.columns);
this.render();
}
set value(v) {
if (!v && this.initial) {
this.placeholder = true;
this.rendered = color.gray(this.transform.render(this.initial));
} else {
this.placeholder = false;
this.rendered = this.transform.render(v);
}
this._value = v;
this.fire();
}
get value() {
return this._value;
}
reset() {
this.value = ``;
this.cursor = Number(!!this.initial);
this.cursorOffset = 0;
this.fire();
this.render();
}
exit() {
this.abort();
}
abort() {
this.value = this.value || this.initial;
this.done = this.aborted = true;
this.error = false;
this.red = false;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
validate() {
var _this = this;
return _asyncToGenerator(function* () {
let valid = yield _this.validator(_this.value);
if (typeof valid === `string`) {
_this.errorMsg = valid;
valid = false;
}
_this.error = !valid;
})();
}
submit() {
var _this2 = this;
return _asyncToGenerator(function* () {
_this2.value = _this2.value || _this2.initial;
_this2.cursorOffset = 0;
_this2.cursor = _this2.rendered.length;
yield _this2.validate();
if (_this2.error) {
_this2.red = true;
_this2.fire();
_this2.render();
return;
}
_this2.done = true;
_this2.aborted = false;
_this2.fire();
_this2.render();
_this2.out.write('\n');
_this2.close();
})();
}
next() {
if (!this.placeholder) return this.bell();
this.value = this.initial;
this.cursor = this.rendered.length;
this.fire();
this.render();
}
moveCursor(n) {
if (this.placeholder) return;
this.cursor = this.cursor + n;
this.cursorOffset += n;
}
_(c, key) {
let s1 = this.value.slice(0, this.cursor);
let s2 = this.value.slice(this.cursor);
this.value = `${s1}${c}${s2}`;
this.red = false;
this.cursor = this.placeholder ? 0 : s1.length + 1;
this.render();
}
delete() {
if (this.isCursorAtStart()) return this.bell();
let s1 = this.value.slice(0, this.cursor - 1);
let s2 = this.value.slice(this.cursor);
this.value = `${s1}${s2}`;
this.red = false;
if (this.isCursorAtStart()) {
this.cursorOffset = 0;
} else {
this.cursorOffset++;
this.moveCursor(-1);
}
this.render();
}
deleteForward() {
if (this.cursor * this.scale >= this.rendered.length || this.placeholder) return this.bell();
let s1 = this.value.slice(0, this.cursor);
let s2 = this.value.slice(this.cursor + 1);
this.value = `${s1}${s2}`;
this.red = false;
if (this.isCursorAtEnd()) {
this.cursorOffset = 0;
} else {
this.cursorOffset++;
}
this.render();
}
first() {
this.cursor = 0;
this.render();
}
last() {
this.cursor = this.value.length;
this.render();
}
left() {
if (this.cursor <= 0 || this.placeholder) return this.bell();
this.moveCursor(-1);
this.render();
}
right() {
if (this.cursor * this.scale >= this.rendered.length || this.placeholder) return this.bell();
this.moveCursor(1);
this.render();
}
isCursorAtStart() {
return this.cursor === 0 || this.placeholder && this.cursor === 1;
}
isCursorAtEnd() {
return this.cursor === this.rendered.length || this.placeholder && this.cursor === this.rendered.length + 1;
}
render() {
if (this.closed) return;
if (!this.firstRender) {
if (this.outputError) this.out.write(cursor.down(lines(this.outputError, this.out.columns) - 1) + clear(this.outputError, this.out.columns));
this.out.write(clear(this.outputText, this.out.columns));
}
super.render();
this.outputError = '';
this.outputText = [style.symbol(this.done, this.aborted), color.bold(this.msg), style.delimiter(this.done), this.red ? color.red(this.rendered) : this.rendered].join(` `);
if (this.error) {
this.outputError += this.errorMsg.split(`\n`).reduce((a, l, i) => a + `\n${i ? ' ' : figures.pointerSmall} ${color.red().italic(l)}`, ``);
}
this.out.write(erase.line + cursor.to(0) + this.outputText + cursor.save + this.outputError + cursor.restore + cursor.move(this.cursorOffset, 0));
}
}
module.exports = TextPrompt;

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