Initial MVP commit

internal/platform/constants/constants.go

@@ -0,0 +1,30 @@
+package constants
+
+import "time"
+
+const (
+	// ObservationWindow defines how far back observations are queried.
+	ObservationWindow = 30 * time.Minute
+
+	// ForecastQueryLimit defines the max forecast periods returned.
+	ForecastQueryLimit = 5
+
+	// DefaultOutputUnitSystem is the API's default output unit system.
+	DefaultOutputUnitSystem = "us"
+
+	// DefaultHTTPAddr is the default listen address for the HTTP server.
+	DefaultHTTPAddr = ":8080"
+)
+
+var SupportedTimestampLayouts = []string{
+	time.RFC3339Nano,
+	time.RFC3339,
+}
+
+const (
+	TempFahrenheitPrecision = 1
+	WindMphPrecision        = 1
+
+	KmhPerMph = 1.609344
+	MphPerKmh = 1 / KmhPerMph
+)

internal/platform/constants/conversion.go

@@ -0,0 +1,17 @@
+package constants
+
+func CelsiusToFahrenheit(c float64) float64 {
+	return c*9.0/5.0 + 32.0
+}
+
+func FahrenheitToCelsius(f float64) float64 {
+	return (f - 32.0) * 5.0 / 9.0
+}
+
+func KmhToMph(kmh float64) float64 {
+	return kmh * MphPerKmh
+}
+
+func MphToKmh(mph float64) float64 {
+	return mph * KmhPerMph
+}