Refactor adjustment method selection

routes/adjustmentMethods/RainDelayAdjustmentMethod.ts

@@ -0,0 +1,27 @@
+import { AdjustmentMethod, AdjustmentMethodResponse, AdjustmentOptions } from "./AdjustmentMethod";
+import { WateringData } from "../../types";
+
+
+/**
+ * Only delays watering if it is currently raining and does not adjust the watering scale.
+ */
+async function calculateRainDelayWateringScale( adjustmentOptions: RainDelayAdjustmentOptions, wateringData: WateringData | undefined ): Promise< AdjustmentMethodResponse > {
+	const raining = wateringData && wateringData.raining;
+	const d = adjustmentOptions && adjustmentOptions.hasOwnProperty( "d" ) ? adjustmentOptions.d : 24;
+	return {
+		scale: undefined,
+		rawData: { raining: raining ? 1 : 0 },
+		rainDelay: raining ? d : undefined
+	}
+}
+
+export interface RainDelayAdjustmentOptions extends AdjustmentOptions {
+	/** The rain delay to use (in hours). */
+	d?: number;
+}
+
+
+const RainDelayAdjustmentMethod: AdjustmentMethod = {
+	calculateWateringScale: calculateRainDelayWateringScale
+};
+export default RainDelayAdjustmentMethod;