SpellerService.ts

SpellerService.ts

import { makeObservable } from "mobx";
import { singleshot } from "react-declarative";
// @ts-ignore
import { Hunspell, loadModule } from 'hunspell-asm/dist/cjs';

import XRegExp from 'xregexp'

export class SpellerService {
  private _hunspell: Hunspell = null as never;

  constructor() {
    makeObservable(this, {});
  }

  public validate = (text: string) => {
    const errors = this._check(text);
    return errors.length ? `Проверьте слова: ${errors.join(', ')}` : null;
  };

  private _check = (text: string) => {
    const regex = XRegExp('[^\\p{N}\\p{L}-_]', 'g')
    return text
      .replace(regex, ' ')
      .split(' ')
      .filter(item => item)
      .filter(item => isNaN(Number(item)))
      .filter(item => !/[0-9]/g.test(item))
      .filter(item => !this._hunspell.spell(item))
  };

  protected prefetch = singleshot(async () => {
    const hunspellFactory = await loadModule();
    const aff = await fetch('/lang/ru_RU.aff');
    const affBuffer = new Uint8Array(await aff.arrayBuffer());
    const affFile = hunspellFactory.mountBuffer(affBuffer, 'lang.aff');
    const dic = await fetch('/lang/ru_RU.dic');
    const dicBuffer = new Uint8Array(await dic.arrayBuffer());
    const dictFile = hunspellFactory.mountBuffer(dicBuffer, 'lang.dic');
    this._hunspell = hunspellFactory.create(affFile, dictFile);
  });
}

export default SpellerService;