server.js

const googleTrends = require('google-trends-api');
var express = require('express')
var cors = require('cors')
var app = express()
app.use(cors())

app.get("/", async (req, res) => {
    res.json({
        'Ping': 'Pong'
    })
})

app.get("/:keyword/:keyword2", async (req, res) => {

    try {

        //console.log('reached')
        var result = [];
        var result2 = [];
        var result3 = []
        googleTrends.interestOverTime({
                keyword: req.params.keyword
            })
            .then(function(results) {
                // console.log((JSON.parse(results).default.timelineData[0]));

                JSON.parse(results).default.timelineData.map((data, i) => {
                    result.push({
                        'date': data.formattedTime,
                        'value': data.value[0]
                    })

                })

            }).then(function() {
                googleTrends.interestOverTime({
                        keyword: req.params.keyword2
                    })
                    .then(function(results) {
                        // console.log((JSON.parse(results).default.timelineData[0]));

                        JSON.parse(results).default.timelineData.map((data, i) => {
                            result2.push({
                                'date': data.formattedTime,
                                'value': data.value[0]
                            })

                        })

                    }).then(function() {
                        googleTrends.interestOverTime({
                                keyword: req.params.keyword + " " + req.params.keyword2
                            })
                            .then(function(results) {
                                // console.log((JSON.parse(results).default.timelineData[0]));

                                JSON.parse(results).default.timelineData.map((data, i) => {
                                    result3.push({
                                        'date': data.formattedTime,
                                        'value': data.value[0]
                                    })

                                })
                                var final = new Array(result.length + 1);
                                final[0] = new Array(4);
                                final[0][0] = "Years";
                                final[0][1] = req.params.keyword;
                                final[0][2] = req.params.keyword2
                                final[0][3] = req.params.keyword + " " + req.params.keyword2;
                                for (var i = 1; i < final.length; i++) {
                                    final[i] = new Array(4);
                                    final[i][0] = result[i - 1] && result[i - 1].date ? result[i - 1].date : "";
                                    final[i][1] = result[i - 1] && result[i - 1].value;
                                    final[i][2] = result2 && result2.length && result2[i - 1].value ? result2[i - 1].value : 0
                                    final[i][3] = result3 && result3.length && result3[i - 1].value ? result3[i - 1].value : 0

                                }
                                res.json(final)


                            })



                    })
            })

    } catch (err) {
        console.log(err)
    }
})
app.get('/:country', async (req, res) => {
    try {
        var result = []
        await googleTrends.dailyTrends({
            geo: req.params.country
        }).then(function(results) {
            var arr = JSON.parse(results).default.trendingSearchesDays[0].trendingSearches
            for (var i = 0; i < arr.length; i++) {
                result.push(arr[i].title.query)
            }
            res.json(result)
        })
        //res.json({'trend1':trend1,'trend2':trend2})
    } catch (err) {
        console.log(err)
    }
})

app.listen(process.env.PORT || '3001', function() {
    console.log("Server started!!")
})