utils.js

const request = require('request');

function getlocation(cb) {
    request.get("https://wtfismyip.com/json", cb);
}

function country(cb) {
    request.get("http://api.population.io:80/1.0/countries", cb)
}

function sts(place, cb) {
    request.get("http://api.population.io:80/1.0/population/2016/" + place + "/", cb)
}

function gchart(d, p) {
    var dc1 = [
        ['Age', '0'],
        ['Male', 0],
        ['Female', 0]
    ];
    var dc2 = [
        ['Gender', 'Total'],
        ['Male', 0],
        ['Female', 0]
    ];
    for (var i = 1; i < d.length; i++) {
        dc1[0][i] = d[i].age.toString();
        dc1[1][i] = d[i].males;
        dc1[2][i] = d[i].females;
        dc2[1][1] = dc2[1][1] + d[i].males;
        dc2[2][1] = dc2[2][1] + d[i].females;
    };

    function comparem(a, b) {
        return (b.males - a.males)
    }

    function comparef(a, b) {
        return (b.females - a.females)
    }

    var dc3t1 = d.sort(comparem).slice(0, 10);
    var dc3t2 = d.sort(comparef).slice(0, 10);
    var dc3m = [
        ['Age', '0'],
        ['Male', 0]
    ];
    var dc3f = [
        ['Age', '0'],
        ['Female', 0]
    ];

    for (var i = 1; i < dc3t1.length; i++) {
        dc3m[0][i] = dc3t1[i].age.toString();
        dc3m[1][i] = dc3t1[i].males;
        dc3f[0][i] = dc3t2[i].age.toString();
        dc3f[1][i] = dc3t2[i].females;
    };

    google.charts.setOnLoadCallback(drawChart);

    function drawChart() {

        // Create the data table.
        var data = new google.visualization.arrayToDataTable(dc1);
        var data2 = new google.visualization.arrayToDataTable(dc2);
        var data3 = new google.visualization.arrayToDataTable(dc3m);
        var data4 = new google.visualization.arrayToDataTable(dc3f);
        // Set chart options
        var options = {
            'title': 'Age Distribution',
            'width': 400,
            'height': 300,
            legend: {
                position: 'none'
            }
        };
        var options2 = {
            'title': 'Gender ratio',
            'width': 400,
            'height': 300,
            pieHole: 0.4,
        };
        var options3 = {
            'title': 'Males Top 10 Ages',
            'width': 400,
            'height': 300,
            textPosition: 'in',
            hAxis: {
                slantedText: true
            }
        };
        var options4 = {
            'title': 'Females Top 10 Ages',
            'width': 400,
            'height': 300,
            textPosition: 'in',
            hAxis: {
                slantedText: true
            }
        };

        // Instantiate and draw our chart, passing in some options.
        var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
        chart.draw(data, options);
        var chart2 = new google.visualization.PieChart(document.getElementById('chart_div2'));
        chart2.draw(data2, options2);
        var chart3 = new google.visualization.ColumnChart(document.getElementById('chart_div3'));
        chart3.draw(data3, options3);
        var chart4 = new google.visualization.ColumnChart(document.getElementById('chart_div4'));
        chart4.draw(data4, options4);
    }
}
module.exports = {
    getlocation:getlocation,
    country: country,
    sts: sts,
    gchart: gchart
}