basant307/AI_Governance_Project

1'use strict';2 3function 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); } }4 5function _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); }); }; }6 7const color = require('kleur');8 9const Prompt = require('./prompt');10 11const _require = require('sisteransi'),12      erase = _require.erase,13      cursor = _require.cursor;14 15const _require2 = require('../util'),16      style = _require2.style,17      clear = _require2.clear,18      figures = _require2.figures,19      wrap = _require2.wrap,20      entriesToDisplay = _require2.entriesToDisplay;21 22const getVal = (arr, i) => arr[i] && (arr[i].value || arr[i].title || arr[i]);23 24const getTitle = (arr, i) => arr[i] && (arr[i].title || arr[i].value || arr[i]);25 26const getIndex = (arr, valOrTitle) => {27  const index = arr.findIndex(el => el.value === valOrTitle || el.title === valOrTitle);28  return index > -1 ? index : undefined;29};30/**31 * TextPrompt Base Element32 * @param {Object} opts Options33 * @param {String} opts.message Message34 * @param {Array} opts.choices Array of auto-complete choices objects35 * @param {Function} [opts.suggest] Filter function. Defaults to sort by title36 * @param {Number} [opts.limit=10] Max number of results to show37 * @param {Number} [opts.cursor=0] Cursor start position38 * @param {String} [opts.style='default'] Render style39 * @param {String} [opts.fallback] Fallback message - initial to default value40 * @param {String} [opts.initial] Index of the default value41 * @param {Boolean} [opts.clearFirst] The first ESCAPE keypress will clear the input42 * @param {Stream} [opts.stdin] The Readable stream to listen to43 * @param {Stream} [opts.stdout] The Writable stream to write readline data to44 * @param {String} [opts.noMatches] The no matches found label45 */46 47 48class AutocompletePrompt extends Prompt {49  constructor(opts = {}) {50    super(opts);51    this.msg = opts.message;52    this.suggest = opts.suggest;53    this.choices = opts.choices;54    this.initial = typeof opts.initial === 'number' ? opts.initial : getIndex(opts.choices, opts.initial);55    this.select = this.initial || opts.cursor || 0;56    this.i18n = {57      noMatches: opts.noMatches || 'no matches found'58    };59    this.fallback = opts.fallback || this.initial;60    this.clearFirst = opts.clearFirst || false;61    this.suggestions = [];62    this.input = '';63    this.limit = opts.limit || 10;64    this.cursor = 0;65    this.transform = style.render(opts.style);66    this.scale = this.transform.scale;67    this.render = this.render.bind(this);68    this.complete = this.complete.bind(this);69    this.clear = clear('', this.out.columns);70    this.complete(this.render);71    this.render();72  }73 74  set fallback(fb) {75    this._fb = Number.isSafeInteger(parseInt(fb)) ? parseInt(fb) : fb;76  }77 78  get fallback() {79    let choice;80    if (typeof this._fb === 'number') choice = this.choices[this._fb];else if (typeof this._fb === 'string') choice = {81      title: this._fb82    };83    return choice || this._fb || {84      title: this.i18n.noMatches85    };86  }87 88  moveSelect(i) {89    this.select = i;90    if (this.suggestions.length > 0) this.value = getVal(this.suggestions, i);else this.value = this.fallback.value;91    this.fire();92  }93 94  complete(cb) {95    var _this = this;96 97    return _asyncToGenerator(function* () {98      const p = _this.completing = _this.suggest(_this.input, _this.choices);99 100      const suggestions = yield p;101      if (_this.completing !== p) return;102      _this.suggestions = suggestions.map((s, i, arr) => ({103        title: getTitle(arr, i),104        value: getVal(arr, i),105        description: s.description106      }));107      _this.completing = false;108      const l = Math.max(suggestions.length - 1, 0);109 110      _this.moveSelect(Math.min(l, _this.select));111 112      cb && cb();113    })();114  }115 116  reset() {117    this.input = '';118    this.complete(() => {119      this.moveSelect(this.initial !== void 0 ? this.initial : 0);120      this.render();121    });122    this.render();123  }124 125  exit() {126    if (this.clearFirst && this.input.length > 0) {127      this.reset();128    } else {129      this.done = this.exited = true;130      this.aborted = false;131      this.fire();132      this.render();133      this.out.write('\n');134      this.close();135    }136  }137 138  abort() {139    this.done = this.aborted = true;140    this.exited = false;141    this.fire();142    this.render();143    this.out.write('\n');144    this.close();145  }146 147  submit() {148    this.done = true;149    this.aborted = this.exited = false;150    this.fire();151    this.render();152    this.out.write('\n');153    this.close();154  }155 156  _(c, key) {157    let s1 = this.input.slice(0, this.cursor);158    let s2 = this.input.slice(this.cursor);159    this.input = `${s1}${c}${s2}`;160    this.cursor = s1.length + 1;161    this.complete(this.render);162    this.render();163  }164 165  delete() {166    if (this.cursor === 0) return this.bell();167    let s1 = this.input.slice(0, this.cursor - 1);168    let s2 = this.input.slice(this.cursor);169    this.input = `${s1}${s2}`;170    this.complete(this.render);171    this.cursor = this.cursor - 1;172    this.render();173  }174 175  deleteForward() {176    if (this.cursor * this.scale >= this.rendered.length) return this.bell();177    let s1 = this.input.slice(0, this.cursor);178    let s2 = this.input.slice(this.cursor + 1);179    this.input = `${s1}${s2}`;180    this.complete(this.render);181    this.render();182  }183 184  first() {185    this.moveSelect(0);186    this.render();187  }188 189  last() {190    this.moveSelect(this.suggestions.length - 1);191    this.render();192  }193 194  up() {195    if (this.select === 0) {196      this.moveSelect(this.suggestions.length - 1);197    } else {198      this.moveSelect(this.select - 1);199    }200 201    this.render();202  }203 204  down() {205    if (this.select === this.suggestions.length - 1) {206      this.moveSelect(0);207    } else {208      this.moveSelect(this.select + 1);209    }210 211    this.render();212  }213 214  next() {215    if (this.select === this.suggestions.length - 1) {216      this.moveSelect(0);217    } else this.moveSelect(this.select + 1);218 219    this.render();220  }221 222  nextPage() {223    this.moveSelect(Math.min(this.select + this.limit, this.suggestions.length - 1));224    this.render();225  }226 227  prevPage() {228    this.moveSelect(Math.max(this.select - this.limit, 0));229    this.render();230  }231 232  left() {233    if (this.cursor <= 0) return this.bell();234    this.cursor = this.cursor - 1;235    this.render();236  }237 238  right() {239    if (this.cursor * this.scale >= this.rendered.length) return this.bell();240    this.cursor = this.cursor + 1;241    this.render();242  }243 244  renderOption(v, hovered, isStart, isEnd) {245    let desc;246    let prefix = isStart ? figures.arrowUp : isEnd ? figures.arrowDown : ' ';247    let title = hovered ? color.cyan().underline(v.title) : v.title;248    prefix = (hovered ? color.cyan(figures.pointer) + ' ' : '  ') + prefix;249 250    if (v.description) {251      desc = ` - ${v.description}`;252 253      if (prefix.length + title.length + desc.length >= this.out.columns || v.description.split(/\r?\n/).length > 1) {254        desc = '\n' + wrap(v.description, {255          margin: 3,256          width: this.out.columns257        });258      }259    }260 261    return prefix + ' ' + title + color.gray(desc || '');262  }263 264  render() {265    if (this.closed) return;266    if (this.firstRender) this.out.write(cursor.hide);else this.out.write(clear(this.outputText, this.out.columns));267    super.render();268 269    let _entriesToDisplay = entriesToDisplay(this.select, this.choices.length, this.limit),270        startIndex = _entriesToDisplay.startIndex,271        endIndex = _entriesToDisplay.endIndex;272 273    this.outputText = [style.symbol(this.done, this.aborted, this.exited), color.bold(this.msg), style.delimiter(this.completing), this.done && this.suggestions[this.select] ? this.suggestions[this.select].title : this.rendered = this.transform.render(this.input)].join(' ');274 275    if (!this.done) {276      const suggestions = this.suggestions.slice(startIndex, endIndex).map((item, i) => this.renderOption(item, this.select === i + startIndex, i === 0 && startIndex > 0, i + startIndex === endIndex - 1 && endIndex < this.choices.length)).join('\n');277      this.outputText += `\n` + (suggestions || color.gray(this.fallback.title));278    }279 280    this.out.write(erase.line + cursor.to(0) + this.outputText);281  }282 283}284 285module.exports = AutocompletePrompt;