Eric Rakestraw
cb316c228a
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63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package units
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import (
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"math"
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"gitea.maximumdirect.net/ejr/weatherapi/internal/platform/constants"
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)
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type Converter interface {
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TemperatureCToOutput(celsius *float64) *float64
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SpeedKmhToOutput(kmh *float64) *float64
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System() string
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}
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type USConverter struct{}
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func (USConverter) System() string {
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return "us"
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}
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func (USConverter) TemperatureCToOutput(celsius *float64) *float64 {
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if celsius == nil {
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return nil
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}
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f := round(constants.CelsiusToFahrenheit(*celsius), constants.TempFahrenheitPrecision)
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return &f
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}
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func (USConverter) SpeedKmhToOutput(kmh *float64) *float64 {
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if kmh == nil {
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return nil
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}
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mph := round(constants.KmhToMph(*kmh), constants.WindMphPrecision)
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return &mph
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}
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type MetricConverter struct{}
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func (MetricConverter) System() string {
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return "metric"
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}
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func (MetricConverter) TemperatureCToOutput(celsius *float64) *float64 {
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return clone(celsius)
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}
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func (MetricConverter) SpeedKmhToOutput(kmh *float64) *float64 {
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return clone(kmh)
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}
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func clone(v *float64) *float64 {
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if v == nil {
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return nil
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}
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out := *v
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return &out
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}
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func round(v float64, precision int) float64 {
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pow := math.Pow(10, float64(precision))
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return math.Round(v*pow) / pow
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}
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