Add response time badge and chart

vendor/github.com/wcharczuk/go-chart/v2/time_series.go

@@ -0,0 +1,91 @@
+package chart
+
+import (
+	"fmt"
+	"time"
+)
+
+// Interface Assertions.
+var (
+	_ Series                 = (*TimeSeries)(nil)
+	_ FirstValuesProvider    = (*TimeSeries)(nil)
+	_ LastValuesProvider     = (*TimeSeries)(nil)
+	_ ValueFormatterProvider = (*TimeSeries)(nil)
+)
+
+// TimeSeries is a line on a chart.
+type TimeSeries struct {
+	Name  string
+	Style Style
+
+	YAxis YAxisType
+
+	XValues []time.Time
+	YValues []float64
+}
+
+// GetName returns the name of the time series.
+func (ts TimeSeries) GetName() string {
+	return ts.Name
+}
+
+// GetStyle returns the line style.
+func (ts TimeSeries) GetStyle() Style {
+	return ts.Style
+}
+
+// Len returns the number of elements in the series.
+func (ts TimeSeries) Len() int {
+	return len(ts.XValues)
+}
+
+// GetValues gets x, y values at a given index.
+func (ts TimeSeries) GetValues(index int) (x, y float64) {
+	x = TimeToFloat64(ts.XValues[index])
+	y = ts.YValues[index]
+	return
+}
+
+// GetFirstValues gets the first values.
+func (ts TimeSeries) GetFirstValues() (x, y float64) {
+	x = TimeToFloat64(ts.XValues[0])
+	y = ts.YValues[0]
+	return
+}
+
+// GetLastValues gets the last values.
+func (ts TimeSeries) GetLastValues() (x, y float64) {
+	x = TimeToFloat64(ts.XValues[len(ts.XValues)-1])
+	y = ts.YValues[len(ts.YValues)-1]
+	return
+}
+
+// GetValueFormatters returns value formatter defaults for the series.
+func (ts TimeSeries) GetValueFormatters() (x, y ValueFormatter) {
+	x = TimeValueFormatter
+	y = FloatValueFormatter
+	return
+}
+
+// GetYAxis returns which YAxis the series draws on.
+func (ts TimeSeries) GetYAxis() YAxisType {
+	return ts.YAxis
+}
+
+// Render renders the series.
+func (ts TimeSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
+	style := ts.Style.InheritFrom(defaults)
+	Draw.LineSeries(r, canvasBox, xrange, yrange, style, ts)
+}
+
+// Validate validates the series.
+func (ts TimeSeries) Validate() error {
+	if len(ts.XValues) == 0 {
+		return fmt.Errorf("time series must have xvalues set")
+	}
+
+	if len(ts.YValues) == 0 {
+		return fmt.Errorf("time series must have yvalues set")
+	}
+	return nil
+}