node-nlp
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Library for NLU (Natural Language Understanding) done in Node.js
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<h1 class="page-title">Source: sentiment/sentiment-manager.js</h1>
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<pre class="prettyprint source linenums"><code>/*
* Copyright (c) AXA Shared Services Spain S.A.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
const SentimentAnalyzer = require('./sentiment-analyzer');
/**
* Class for the sentiment anlysis manager, able to manage
* several different languages at the same time.
*/
class SentimentManager {
/**
* Constructor of the class.
*/
constructor() {
this.languages = {};
}
/**
* Adds a new analyzer by locale. If the locale analyzer already exists,
* then return the existing one.
* @param {String} locale Locale for the analyzer.
* @returns {SentimentAnalyzer} Analyzer for the locale.
*/
addLanguage(locale, settings) {
let result = this.languages[locale];
if (!result) {
result = new SentimentAnalyzer(
Object.assign({}, { language: locale }, settings)
);
this.languages[locale] = result;
}
return result;
}
/**
* Process a phrase of a given locale, calculating the sentiment analysis.
* @param {String} locale Locale of the phrase.
* @param {String} phrase Phrase to calculate the sentiment.
* @returns {Promise.Object} Promise sentiment analysis of the phrase.
*/
async process(locale, phrase) {
const analyzer = this.addLanguage(locale);
const sentiment = await analyzer.getSentiment(phrase);
let vote;
if (sentiment.score > 0) {
vote = 'positive';
} else if (sentiment.score < 0) {
vote = 'negative';
} else {
vote = 'neutral';
}
return {
score: sentiment.score,
comparative: sentiment.comparative,
vote,
numWords: sentiment.numWords,
numHits: sentiment.numHits,
type: sentiment.type,
language: sentiment.language,
};
}
}
module.exports = SentimentManager;
</code></pre>
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