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sandbox-react
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feat(pbf): read more from pbf

This commit is contained in:
dancingCycle 2022-09-14 14:20:27 +02:00
parent 6fb285e9de
commit 16abe8b37a
1 changed files with 17 additions and 6 deletions
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23
pbf/app/pages/home.jsx
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@ -6,7 +6,7 @@ import { FeedMessage } from '../../proto2js/js/gtfs-rt.js';
import '../style.css';
const Home = () => {
/*storage*/
const [vehPos, setVehPos] = useState({});
const [vehPos, setVehPos] = useState([]);
/*fetch vehPost in a JavaScript function*/
const getVehPos = async () => {
try {
@ -26,21 +26,23 @@ const Home = () => {
//console.log('getVehPos() JSON pbf: ', JSON.stringify(pbf));
const feed = FeedMessage.read(pbf);
if (feed.header) {
console.log('getVehPos() header available');
//console.log('getVehPos() header available');
const {gtfs_realtime_version, incrementality, timestamp}=feed.header;
if(gtfs_realtime_version && incrementality, timestamp){
console.log(`getVehPos() gtfs_realtime_version: ${gtfs_realtime_version}, incrementaltiy: ${incrementality}, timestamp: ${timestamp} available`);
}
}else{
console.error('getVehPos() header NOT available');
}
const messages = [];
//console.log('getVehPos() feed: ', feed);
//console.log('getVehPos() JSON feed: ', JSON.stringify(feed));
feed.entity.forEach(entity => {
const vehiclePos = entity.vehicle;
if (vehiclePos) {
console.log('getVehPos() vehiclePos available');
//console.log('getVehPos() vehiclePos available');
const { trip, position, vehicle } = vehiclePos;
if (trip && position && vehicle) {
console.log(`getVehPos() trip: ${trip}, position: ${position} & vehicle: ${vehicle} available`);
const {trip_id, route_id, direction_id, start_time, start_date, schedule_relationship}=trip;
if(trip_id){
console.log(`getVehPos() trip_id:${trip_id} available`);
@ -64,6 +66,12 @@ const Home = () => {
if(longitude){
console.log(`getVehPos() longitude:${longitude} available`);
}
const message={
routeId: route_id === undefined ? -1 : parseInt(route_id,10) || -2,
lat: latitude === undefined ? -360 : latitude,
lon: longitude === undefined ? -720 : longitude,
};
messages.push(message);
} else {
console.error('getVehPos() trip, position & vehicle NOT unavailable ');
}
@ -71,11 +79,11 @@ const Home = () => {
console.error('getVehPos() vehiclePos NOT available');
}
});
/*set state*/
setVehPos(messages);
} else {
console.error('getVehPos() res.data unavailable ');
}
/*set state*/
setVehPos(res.data);
} catch (err) {
console.error('err.message: ' + err.message);
}
@ -87,6 +95,9 @@ const Home = () => {
<h3>(React.js Lambda Function Component)</h3>
<Hello msg="Hello World!" />
<button onClick={getVehPos}>getVehPos</button>
<p>
vehicle position count: {vehPos.length}
</p>
</>
);
}