updates + tests

last_value_annotation_series.go

@@ -1,37 +0,0 @@
-package chart
-
-import "fmt"
-
-// LastValueAnnotation returns an annotation series of just the last value of a value provider.
-func LastValueAnnotation(innerSeries ValuesProvider, vfs ...ValueFormatter) AnnotationSeries {
-	var vf ValueFormatter
-	if len(vfs) > 0 {
-		vf = vfs[0]
-	} else if typed, isTyped := innerSeries.(ValueFormatterProvider); isTyped {
-		_, vf = typed.GetValueFormatters()
-	} else {
-		vf = FloatValueFormatter
-	}
-
-	var lastValue Value2
-	if typed, isTyped := innerSeries.(LastValuesProvider); isTyped {
-		lastValue.XValue, lastValue.YValue = typed.GetLastValues()
-		lastValue.Label = vf(lastValue.YValue)
-	} else {
-		lastValue.XValue, lastValue.YValue = innerSeries.GetValues(innerSeries.Len() - 1)
-		lastValue.Label = vf(lastValue.YValue)
-	}
-
-	var seriesName string
-	var seriesStyle Style
-	if typed, isTyped := innerSeries.(Series); isTyped {
-		seriesName = fmt.Sprintf("%s - Last Value", typed.GetName())
-		seriesStyle = typed.GetStyle()
-	}
-
-	return AnnotationSeries{
-		Name:        seriesName,
-		Style:       seriesStyle,
-		Annotations: []Value2{lastValue},
-	}
-}