function drawLineChart()

in cmd/internal/pages/assets/js/containers.js [68:134]
56 lines of code
11 McCabe index (conditional complexity)

function drawLineChart(seriesTitles, data, elementId, unit) {
  var min = Infinity;
  var max = -Infinity;
  for (var i = 0; i < data.length; i++) {
    // Convert the first column to a Date.
    if (data[i] != null) {
      data[i][0] = new Date(data[i][0]);
    }

    // Find min, max.
    for (var j = 1; j < data[i].length; j++) {
      var val = data[i][j];
      if (val < min) {
        min = val;
      }
      if (val > max) {
        max = val;
      }
    }
  }

  // We don't want to show any values less than 0 so cap the min value at that.
  // At the same time, show 10% of the graph below the min value if we can.
  var minWindow = min - (max - min) / 10;
  if (minWindow < 0) {
    minWindow = 0;
  }

  // Add the definition of each column and the necessary data.
  var dataTable = new google.visualization.DataTable();
  dataTable.addColumn('datetime', seriesTitles[0]);
  for (var i = 1; i < seriesTitles.length; i++) {
    dataTable.addColumn('number', seriesTitles[i]);
  }
  dataTable.addRows(data);

  // Create and draw the visualization.
  if (!(elementId in window.charts)) {
    window.charts[elementId] =
        new google.visualization.LineChart(document.getElementById(elementId));
  }

  // TODO(vmarmol): Look into changing the view window to get a smoother
  // animation.
  var opts = {
    curveType: 'function',
    height: 300,
    legend: {position: 'none'},
    focusTarget: 'category',
    vAxis: {
      title: unit,
      viewWindow: {
        min: minWindow,
      }
    },
    legend: {
      position: 'bottom'
    }
  };
  // If the whole data series has the same value, try to center it in the chart.
  if (min == max) {
    opts.vAxis.viewWindow.max = 1.1 * max;
    opts.vAxis.viewWindow.min = 0.9 * max;
  }

  window.charts[elementId].draw(dataTable, opts);
}