add google maps service for lat/long of chosen location

src/api/google.ts

@@ -1,16 +1,19 @@
-export const GOOGLE_MAPS_API_KEY = 'AIzaSyDUnWIrt-H4RuP2YFLpVPz4oAjBhpOOoyI';
+export type PlaceDetails = {
+	formattedAddress: string;
+	latitude: number;
+	longitude: number;
+};
 
-export async function searchForPlaces(query: string) {
-	const url = new URL(
-		'https://maps.googleapis.com/maps/api/place/findplacefromtext/json'
-	);
-	url.searchParams.set('key', GOOGLE_MAPS_API_KEY);
-	url.searchParams.set('input', query);
-	url.searchParams.set('inputtype', 'textquery');
-	url.searchParams.set('fields', 'place_id,name,formatted_address');
-	console.log(url.toString());
-	let res = await fetch(url.toString(), { mode: 'no-cors' });
-	let json = await res.text();
+export async function getPlaceDetails(
+	placeId: string
+): Promise<PlaceDetails | null> {
+	if (placeId == null) {
+		console.warn('placeId was null');
+		return null;
+	}
+
+	const result = await fetch('http://localhost:5000/api/place/' + placeId);
+	const json = await result.json();
 
 	return json;
 }

src/components/NewUI/Event.tsx

@@ -4,6 +4,7 @@ import UIButton from './UIButton';
 import UIPlacesAutocomplete from './UIPlacesAutocomplete';
 import UISecondaryBox from './UISecondaryBox';
 import UISecondaryHeader from './UISecondaryHeader';
+import usePlace from './usePlace';
 import useThrottle from './useThrottle';
 import useToggle from './useToggle';
 
@@ -205,18 +206,22 @@ const dummyPeopleData: IPerson[] = [
 		longitude: 10.12,
 	},
 ];
-function People({ event }: { event: IEvent }) {
+function People({ event, placeId }: { event: IEvent; placeId: string }) {
 	const PADDING = '1rem';
 	// eslint-disable-next-line
 	const [people, setPeople] = useState(dummyPeopleData);
+	const placeDetails = usePlace(placeId);
 	const myLatitude = 10;
 	const myLongitude = 10;
-	const locationLatitude = 12;
-	const locationLongitude = 12;
+
 	return (
 		<div style={{ display: 'flex', flexDirection: 'column' }}>
 			<h3 style={{ marginBlockEnd: '0' }}>People</h3>
 			{people.map(({ name, latitude, longitude, id }) => {
+				let extraDistance = null;
+				if (placeDetails != null) {
+					const locationLatitude = placeDetails.latitude;
+					const locationLongitude = placeDetails.longitude;
 					const meToThem = latlongdist(
 						latitude,
 						longitude,
@@ -239,7 +244,8 @@ function People({ event }: { event: IEvent }) {
 						locationLongitude,
 						R_miles
 					);
-				const extraDistance = totalWithThem - totalWithoutThem;
+					extraDistance = totalWithThem - totalWithoutThem;
+				}
 
 				return (
 					<div
@@ -254,7 +260,8 @@ function People({ event }: { event: IEvent }) {
 							marginBottom: '0.5rem',
 						}}
 					>
-						<b>{name}</b>: +{extraDistance.toFixed(1)} miles
+						<b>{name}</b>
+						{extraDistance ? `: +${extraDistance.toFixed(1)} miles` : ''}
 						<div
 							style={{
 								borderRadius: '0.5em',
@@ -278,7 +285,7 @@ function People({ event }: { event: IEvent }) {
 export default function Event({ event }: { event: IEvent }) {
 	const { name, group, formattedAddress, startTime, endTime } = event;
 	const [haveRide, toggleHaveRide] = useToggle(false);
-	const [locationPlaceId, setLocationPlaceId] = useState<string>(null!);
+	const [placeId, setPlaceId] = useState<string>(null!);
 	const [interested, toggleInterested] = useToggle(false);
 	const toggleInterestedThrottled = useThrottle(toggleInterested, 500);
 
@@ -302,11 +309,9 @@ export default function Event({ event }: { event: IEvent }) {
 					<UIPlacesAutocomplete
 						placeholder="Pickup and dropoff location"
 						onSelected={(_address, placeID) => {
-							setLocationPlaceId(placeID);
+							setPlaceId(placeID);
 						}}
-						style={
-							locationPlaceId != null ? { border: '2px solid ' + green } : {}
-						}
+						style={placeId != null ? { border: '2px solid ' + green } : {}}
 					/>
 					{false && (
 						<div
@@ -332,7 +337,7 @@ export default function Event({ event }: { event: IEvent }) {
 						</div>
 					)}
 					<Carpools event={event} />
-					<People event={event} />
+					<People event={event} placeId={placeId} />
 				</>
 			)}
 		</UISecondaryBox>

src/components/NewUI/usePlace.ts

@@ -0,0 +1,24 @@
+import { useState, useEffect, useCallback } from 'react';
+import { getPlaceDetails, PlaceDetails } from '../../api/google';
+import useThrottle from './useThrottle';
+
+export default function usePlace(placeId: string) {
+	const [placeDetails, setPlaceDetails] = useState<PlaceDetails | null>(null);
+
+	const updatePlaceDetails = useCallback(() => {
+		if (placeId == null) {
+			setPlaceDetails(null);
+		} else {
+			getPlaceDetails(placeId).then(setPlaceDetails);
+		}
+	}, [placeId]);
+
+	const updatePlaceDetailsThrottled = useThrottle(updatePlaceDetails, 500);
+
+	useEffect(updatePlaceDetailsThrottled, [
+		placeId,
+		updatePlaceDetailsThrottled,
+	]);
+
+	return placeDetails;
+}

src/components/NewUI/useThrottle.ts

@@ -1,11 +1,13 @@
 import { useMemo } from 'react';
 
-function throttle<F extends (...args: any) => any, T>(
+type Void = (...args: any) => void;
+
+export function throttle<T>(
 	this: T,
-	callback: F,
+	callback: Void,
 	limit: number,
 	thisArg?: T
-): F {
+): (...args: Parameters<typeof callback>) => void {
 	let waiting = false;
 	let pendingArgs: null | any[] = null;
 	const scope = thisArg ?? this;