How to use the @nlpjs/lang-es/src.StemmerEs function in @nlpjs/lang-es
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hubtype / botonic / packages / botonic-plugin-contentful / src / nlp / stemmer.ts View on Github 
import { BaseStemmer } from '@nlpjs/core/src'
import { StemmerCa } from '@nlpjs/lang-ca/src'
import { StemmerEn } from '@nlpjs/lang-en/src'
import { StemmerEs } from '@nlpjs/lang-es/src'
import { StemmerPt } from '@nlpjs/lang-pt/src'
import { StemmerPl } from './stemmers/polish-stemmer'
// see https://github.com/axa-group/nlp.js/blob/HEAD/docs/language-support.md
// and https://stackoverflow.com/a/11210358/145289
// snowball algorithm inspired from https://github.com/MihaiValentin/lunr-languages, based on
// https://github.com/fortnightlabs/snowball-js/blob/master/stemmer/src/ext/SpanishStemmer.js based on
// java version at http://snowball.tartarus.org/download.html
export const stemmers: { [key: string]: BaseStemmer } = {
ca: new StemmerCa(),
en: new StemmerEn(),
es: new StemmerEs(),
pl: new StemmerPl(),
pt: new StemmerPt(),
//node-nlp does not support polish
}
export function stemmerFor(locale: string): BaseStemmer {
const stem = stemmers[locale]
if (!stem) {
throw new Error(`No stemmer configured for locale '${locale}'`)
}
return stem
}
