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PageMap.js
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PageMap.js
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import React, { useEffect, useState } from 'react';
import { BackHandler, StyleSheet, Text, View } from 'react-native';
import { LeafletView, MapShapeType } from 'react-native-leaflet-view';
import { SafeAreaView } from 'react-native-safe-area-context';
import Load from './components/Load';
import Toolbar from './components/Toolbar';
import DB from './utilities/Database';
import Web from './utilities/Web';
const Map = ({ hide = false, mapShapes = [], mapMarkers = [], mapCenterPosition = {} }) => {
useEffect(() => {
}, [hide, mapShapes, mapMarkers, mapCenterPosition]);
if (hide) {
return null;
} else if (mapShapes.length == 0) {
return (
<View style={styles.mapFullscreen}>
<Text>Without points</Text>
</View>
);
} else {
return (
<View style={styles.mapFullscreen}>
<LeafletView
mapMarkers={mapMarkers}
mapShapes={mapShapes}
mapCenterPosition={mapCenterPosition}
doDebug={false}
/>
</View>
);
}
}
const PageMap = ({ route, navigation }) => {
const [params, setParams] = useState({ filter: null, view: 'map' });
const [id, setId] = useState(0);
const [load, setLoad] = useState('');
const [mapShapes, setMapShapes] = useState([]);
const [mapMarkers, setMapMarkers] = useState([]);
const [mapCenterPosition, setMapCenterPosition] = useState(null);
const loadDone = async (p) => {
let points = [];
p.forEach(point => {
let position = { lat: point.lat, lng: point.lng };
points.push(position);
});
let shape = {
color: '#ff3333',
positions: points,
shapeType: MapShapeType.POLYLINE,
center: points[0]
}
let mark = {
position: points[0],
icon: 'START',
size: [16, 16]
}
setMapShapes([shape]);
setMapMarkers([mark]);
setMapCenterPosition(points[0]);
setLoad('done');
}
const hasPoints = async (id) => {
let points = await DB.exec('SELECT points FROM trails WHERE id = ?', [id])
if (points[0].points == null) {
getPoints(id);
} else {
if (points[0].points) {
setLoad('getPointsByTrailId');
} else {
setLoad('done');
}
}
}
const getPoints = async (id) => {
if (id == 0) return;
await DB.exec('DELETE FROM points WHERE trail = ?', [id]);
await DB.exec('UPDATE trails SET pointLat = NULL, pointLng = NULL, points = NULL WHERE id = ?', [id]);
await Web.cleanCache();
let link = await DB.exec('SELECT link FROM trails WHERE id = ?', [id]);
let points = await Web.getPoints(link[0].link);
if (points == null) {
await DB.exec('UPDATE trails SET pointLat = NULL, pointLng = NULL, points = 0 WHERE id = ?', [id]);
setLoad('done');
} else {
for (let i = 0; i < points.length; i++) {
points[i] = {
id: i + 1,
trail: id,
ele: points[i].ele,
lat: points[i].lat,
lng: points[i].lon
};
}
let sql = 'INSERT INTO points (id, trail, ele, lat, lng) VALUES';
points.forEach((p) => {
let values = ` (${p.id}, ${p.trail}, ${p.ele}, ${p.lat}, ${p.lng}),`;
sql += values;
});
sql = sql.substring(0, sql.length - 1) + ';';
await DB.exec(sql);
await DB.exec(
'UPDATE trails SET pointLat = ?, pointLng = ?, points = 1 WHERE id = ?',
[points[0].lat, points[0].lng, id]);
setLoad('getPointsByTrailId');
}
}
useEffect(() => {
if (route.params != undefined) {
setParams({ filter: route.params.filter, view: route.params.view });
setId(route.params.id);
hasPoints(route.params.id);
}
const backHandler = BackHandler.addEventListener('hardwareBackPress', () => {
navigation.navigate('PageHome', params);
return true;
});
return () => backHandler.remove();
}, [route.params]);
return (
<SafeAreaView style={styles.fullscreen}>
<Toolbar
leftIcon={'arrow-left'}
leftText={'Map'}
leftButton={() => { navigation.navigate('PageHome', params); }} />
<View style={styles.fullscreen}>
<Load
load={load}
input={id}
resolve={loadDone} />
<Map
hide={load != 'done'}
mapCenterPosition={mapCenterPosition}
mapMarkers={mapMarkers}
mapShapes={mapShapes} />
</View>
</SafeAreaView>
);
}
const styles = StyleSheet.create({
fullscreen: {
flex: 1,
flexDirection: 'column'
},
toolbar: {
height: 50,
backgroundColor: 'red',
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'space-between',
padding: 8,
zIndex: 1
},
mapFullscreen: {
flex: 1,
flexDirection: 'column',
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'yellow',
position: 'relative'
},
listFullscreenAbs: {
position: 'absolute',
top: 0,
left: 0,
width: '100%',
height: '100%'
},
});
export default PageMap;