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import { DistanceCalculator } from "https://deno.land/x/distancecalculator@1.0.0/distance-calculator.ts";
export class Utility {
    public static getClosestEntry(items: any[], lat: number, lon: number): any {
        let itemsWithDistance = Utility.enrichDistance(items, lat, lon)
        let sortedItemsWithDistance = Utility.sortByDistance(itemsWithDistance)
        const theClosest = sortedItemsWithDistance[0]                theClosest.tempDistance = undefined // ensuring the original structure                return theClosest    }
    private static sortByDistance(items: any[]): any[] {        return items.sort((c1, c2) => {            if (c1.tempDistance > c2.tempDistance) {                return 1            }
            if (c1.tempDistance < c2.tempDistance) {                return -1            }
            return 0        })    }
    private static enrichDistance(items: any[], lat: number, lon: number): any[] {
        for (const item of items) {            if (item.lat === undefined || item.lon === undefined || item.tempDistance !== undefined){                throw new Error('Each entry should have lat and lon and no tempDistance.')            }            item.tempDistance = DistanceCalculator.getDistanceInKilometers(item.lat, item.lon, lat, lon)
        }        return items    }}