67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
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package chart
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import (
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"fmt"
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"time"
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"github.com/blendlabs/go-util"
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)
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// TimeSeries is a line on a chart.
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type TimeSeries struct {
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Name string
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Style Style
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FinalValueLabel Style
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XValues []time.Time
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YValues []float64
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}
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// GetName returns the name of the time series.
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func (ts TimeSeries) GetName() string {
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return ts.Name
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}
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// GetStyle returns the line style.
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func (ts TimeSeries) GetStyle() Style {
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return ts.Style
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}
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// Len returns the number of elements in the series.
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func (ts TimeSeries) Len() int {
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return len(ts.XValues)
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}
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// GetValue gets a value at a given index.
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func (ts TimeSeries) GetValue(index int) (x float64, y float64) {
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x = float64(ts.XValues[index].Unix())
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y = ts.YValues[index]
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return
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}
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// GetXFormatter returns the x value formatter.
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func (ts TimeSeries) GetXFormatter() Formatter {
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return func(v interface{}) string {
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if typed, isTyped := v.(time.Time); isTyped {
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return typed.Format(DefaultDateFormat)
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}
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if typed, isTyped := v.(int64); isTyped {
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return time.Unix(typed, 0).Format(DefaultDateFormat)
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}
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if typed, isTyped := v.(float64); isTyped {
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return time.Unix(int64(typed), 0).Format(DefaultDateFormat)
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}
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return util.StringEmpty
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}
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}
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// GetYFormatter returns the y value formatter.
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func (ts TimeSeries) GetYFormatter() Formatter {
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return func(v interface{}) string {
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if typed, isTyped := v.(float64); isTyped {
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return fmt.Sprintf("%0.2f", typed)
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}
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return util.StringEmpty
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}
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}
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