@botonic/plugin-contentful/lib/esm/nlp/stemmers/stemmer-bg.js

Botonic Plugin Contentful is one of the **[available](https://github.com/hubtype/botonic/tree/master/packages)** plugins for Botonic. **[Contentful](http://www.contentful.com)** is a CMS (Content Management System) which manages contents of a great variet

import { bgDefaultStopWords } from '../stopwords/stopwords-bg';
import { bgTransformations } from './transformations/transformations-bg';
export class StemmerBg {
    stem(tokens) {
        return tokens.map(token => this.stemToken(token));
    }
    stemToken(token) {
        if (this.isStopWord(token)) {
            return token;
        }
        else {
            return this.getRoot(token);
        }
    }
    isStopWord(token) {
        return bgDefaultStopWords.indexOf(token) != -1;
    }
    getRoot(token) {
        const length = token.length;
        if (length > 1) {
            for (let i = 0; i < length; i++) {
                const suffix = token.substring(i);
                const root = bgTransformations[suffix];
                if (root != undefined) {
                    return token.substring(0, i).concat(root);
                }
            }
        }
        return token;
    }
}
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