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server.js
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server.js
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const express = require('express');
const bodyParser = require('body-parser');
const knex = require('knex');
const cors = require('cors');
const app = express();
const db = knex({
client: 'pg',
connection: {
connectionString: process.env.DATABASE_URL,
ssl: true
}
})
app.use(bodyParser.json());
app.use(cors());
let percentileArray = [];
app.post('/', (req, res) => {
const reqObject = req.body;
const jsonLength = Object.keys(reqObject).length - 1;
let i = 0;
// retrieves percentiles from database and pushes them to array
const getPercentiles = async () => {
while(i <= jsonLength) {
const gotData = await db.select('percentile').from('wordlist').where('word', reqObject[i]);
await percentileArray.push(gotData[0].percentile);
i++;
}
};
// empties array for next request
const emptyArray = () => {
percentileArray.length = 0;
};
// finds the largest percentile in array, sends it to client, empties array
const sendToClient = async () => {
try {
await getPercentiles();
await res.json(Math.max(...percentileArray));
await emptyArray();
} catch {
res.json("More than 100");
}
};
sendToClient();
});
app.listen(process.env.PORT||3000, () => {
console.log(`App is running on port ${process.env.PORT}`)
})