testaar

// En test af Group 
app.get('/testaar', function(req, res) {

    function QueryMongoDB(callback) {
        MongoClient.connect('mongodb://localhost:27017/Akkredibot', function(err, db) {
            if (err) throw err
    
                // her vælges akkredibot databasen inklusiv query 
                db.collection('akkrdata').aggregate([
                    {$group:
                        {_id: '$Aar', total: {$sum: 1}}	
                    },
                    {$sort: 
                        {_id: 1}
                    }
                ], function(err, result) {
    
                    mongodbSvar = result.map(x => x._id)
                    mongodbSvar = mongodbSvar.map(String)
                    mongodbSvar2 = result.map(x => x.total)
                    mongodbSvar2 = mongodbSvar2.map(String)

                callback()
                })
            })
        }
/*
        function SendJSON() {
            jsonResponse.push( mongodbSvar, mongodbSvar2  );
            res.send(jsonResponse);
        }
    
        QueryMongoDB(SendJSON);
        jsonResponse.length = 0;
*/
    const ChartjsNode = require('chartjs-node');
    // 600x600 canvas size
    var chartNode = new ChartjsNode(600, 600);
    var randomnumber = Math.random();
    var imagename = "testimage" + randomnumber + ".png"

    // each api returns a Promise
    chartNode.drawChart({
            type: 'bar',
            data: {
                labels: mongodbSvar,
                datasets: [{
                    label: 'Antal akkrediteringer',
                    data: mongodbSvar2,
                    backgroundColor: [
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)'
                    ],
                    borderColor: [
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)'
                    ],
                    borderWidth: 1
                }]
            },
            options: {
                layout: {
                    padding: {
                        left: 30,
                        right: 30,
                        top: 30,
                        bottom: 30
                    }
                },
                scales: {
                    yAxes: [{
                        ticks: {
                            beginAtZero: true
                        }
                    }]
                }
            }
        })
        .then(() => {
            // now we have a chart
            // lets get the image stream
            return chartNode.getImageStream('image/png');
        })
        .then(imageStream => {
            // now you can do anything with the image, like upload to S3
            // lets get the image buffer
            return chartNode.getImageBuffer('image/png');
        })
        .then(imageBuffer => {
            // now you can modify the raw PNG buffer if you'd like
            // want to write the image directly to the disk, no problem
            return chartNode.writeImageToFile('image/png', '/home/nicki/akkredibot/img/' + imagename);
        })
        .then(() => {
            jsonResponse.length = 0;
            jsonResponse.push({
                "attachment": {
                    "type": "image",
                    "payload": {
                        "url": "http://95.85.21.185/" + imagename + "",
                    "Test": + mongodbSvar + "og" + mongodbSvar2
                    }
                }
            });
            res.send(jsonResponse);
            jsonResponse.length = 0;

            chartNode.destroy()
        });