Added StatDB data type and IsKeyInvalid, AddStatistics methods

types/statistics.go

@@ -0,0 +1,21 @@
+package types
+
+// The WeatherAnomaly data type, representing
+// skewed meteorological events
+type WeatherAnomaly struct {
+	Date ZephyrDate `json:"date"`
+	Temp float64    `json:"temperature"`
+}
+
+// The StatResult data type, representing weather statistics
+// of past meteorological events
+type StatResult struct {
+	Min     float64        `json:"min"`
+	Max     float64        `json:"max"`
+	Count   int            `json:"count"`
+	Mean    float64        `json:"mean"`
+	StdDev  float64        `json:"stdDev"`
+	Median  float64        `json:"median"`
+	Mode    float64        `json:"mode"`
+	Anomaly WeatherAnomaly `json:"anomaly"`
+}