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IBMWatsonUpdated.js
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IBMWatsonUpdated.js
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// require xhr
const XHR = require('xhr');
// require state
const db = require('kvstore');
const qs = require('codec/query_string');
export default (request) => {
// api credentials
const apiUsername = 'IBM_API_Username';
const apiPW = 'IBM_API_Password';
const apiVersion = '2017-02-27'
// url for sentiment analysis api
const apiUrl = 'https://'+apiUsername+':'+apiPW+'@gateway.watsonplatform.net/natural-language-understanding/api/v1/analyze';
const querystring = qs.stringify({
version: apiVersion,
text: request.message.text,
features: 'sentiment',
});
const sessionId = request.message.session_id;
return db.get('sentiment_db').then(function (val) {
const sentimentDb = val || {};
const sessionSentiment = sentimentDb[sessionId] || {
overall: 0,
positive: {
count: 0,
avg: 0
},
negative: {
count: 0,
avg: 0
}
};
return XHR.fetch(apiUrl + '?' + querystring).then(function (r) {
console.log(r);
const body = JSON.parse(r.body);
const type = body.sentiment.document.label;
const score = body.sentiment.document.score;
const cur = sessionSentiment[type] || { count: 0, avg: 0 };
const curSum = cur.avg * cur.count;
const newtotal = ++(cur.count);
const newAvg = ((curSum) + Number(score)) / newtotal;
console.log(newAvg);
sessionSentiment[type] = {
count: newtotal,
avg: newAvg
};
sessionSentiment.overall =
(sessionSentiment.positive.count
* sessionSentiment.positive.avg) +
(sessionSentiment.negative.count
* sessionSentiment.negative.avg);
sentimentDb[sessionId] = sessionSentiment;
db.set('sentiment_db', sentimentDb);
request.message.session_id = sessionId;
request.message.body = body;
request.message.session_sentiment = sessionSentiment;
request.message.score =
sessionSentiment.overall + (Math.random() / 10000);
return request.ok();
})
.catch(function (e){
console.error(e);
return request.ok();
});
});
};