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Editing: dashboard.min.js

var saleStatisticsChart = document.getElementById("saleStatisticsChart").getContext('2d');
var usersStatisticsChart = document.getElementById("usersStatisticsChart").getContext('2d');
var chart = {};

function makeStatisticsChart(name, section, badge, labels, datasets) {
  chart[name] = new Chart(section, {
    type: 'line',
    data: {
      labels: labels,
      datasets: [{
        label: badge,
        data: datasets,
        borderWidth: 5,
        borderColor: '#6777ef',
        backgroundColor: 'transparent',
        pointBackgroundColor: '#fff',
        pointBorderColor: '#6777ef',
        pointRadius: 4
      }]
    },
    options: {
      legend: {
        display: false
      },
      scales: {
        yAxes: [{
          gridLines: {
            display: false,
            drawBorder: false
          },
          ticks: {
            stepSize: 150
          }
        }],
        xAxes: [{
          gridLines: {
            color: '#fbfbfb',
            lineWidth: 2
          }
        }]
      }
    }
  });
}

function getSaleStatisticsData(type) {
  $.post(adminPanelPrefix + '/dashboard/getSaleStatisticsData', {
    type: type
  }, function (result) {
    if (result && result.code == 200) {
      if (chart && chart.saleStatisticsChart) {
        chart.saleStatisticsChart.destroy();
      }

makeStatisticsChart('saleStatisticsChart', saleStatisticsChart, 'Sale', result.chart.labels, result.chart.data);
    }
  });
}

(function () {
  "use strict";

$('body').on('click', '.js-sale-chart-month', function (e) {
    e.preventDefault();
    $(this).addClass('btn-primary');
    $('.js-sale-chart-year').removeClass('btn-primary');
    getSaleStatisticsData('day_of_month');
  });
  $('body').on('click', '.js-sale-chart-year', function (e) {
    e.preventDefault();
    $(this).addClass('btn-primary');
    $('.js-sale-chart-month').removeClass('btn-primary');
    getSaleStatisticsData('month_of_year');
  });
})(jQuery);

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