1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
import {
Alert,
Platform,
StyleSheet,
} from 'react-native';
import ParallaxScrollView from '@/components/ParallaxScrollView';
import { ThemedText } from '@/components/ThemedText';
import { ThemedView } from '@/components/ThemedView';
import React, { useState, useCallback, useEffect, useRef } from 'react';
import AsyncStorage from '@react-native-async-storage/async-storage';
import { useFocusEffect } from '@react-navigation/native';
import { Link, router, useLocalSearchParams } from 'expo-router';
import MapView, { Polygon, Region } from 'react-native-maps';
import { Ionicons } from '@expo/vector-icons';
import { useColorScheme } from '@/hooks/useColorScheme.web';
import { Colors } from '@/constants/Colors';
interface AlertData {
id: string;
userId: string;
createdAt: string;
area: string;
extendedArea: string;
level: string;
}
interface PolygonCoordinates {
latitude: number;
longitude: number;
}
export default function AlertIdScreen() {
const [token, setToken] = useState<string>('');
const [userId, setUserId] = useState<string>('');
const [alert, setAlert] = useState<AlertData | null>(null);
const [region, setRegion] = useState<Region>({
latitude: 44.49738301084014,
longitude: 11.356121722966094,
latitudeDelta: 0.03,
longitudeDelta: 0.03,
});
const [polygon, setPolygon] = useState<PolygonCoordinates[]>([]);
const [extendedPolygon, setExtendedPolygon] = useState<PolygonCoordinates[]>([]);
const mapRef = useRef<MapView | null>(null);
const checkAuth = useCallback(async () => {
const storedToken =
Platform.OS === 'web'
? localStorage.getItem('token')
: await AsyncStorage.getItem('token');
const storedUserId =
Platform.OS === 'web'
? localStorage.getItem('userId')
: await AsyncStorage.getItem('userId');
setToken(storedToken || '');
setUserId(storedUserId || '');
if (!storedToken || !storedUserId) {
Alert.alert(
'Login required',
'You must log in to the system if you want to see alerts list',
[
{
text: 'Ok',
onPress: () => router.push('/'),
},
]
);
}
}, []);
const fetchAlert = useCallback(async (id: string) => {
if (!token || !userId) return;
try {
const response = await fetch(
`${process.env.EXPO_PUBLIC_API_URL}/graphql`,
{
method: 'POST',
headers: {
Authorization: `Bearer ${token}`,
'Content-Type': 'application/json',
},
body: JSON.stringify({
query: `{ alerts(id: ${id}) { id, userId, createdAt, area, extendedArea, level } }`,
}),
}
);
const data = await response.json();
if (data.errors) {
Alert.alert('Error', 'Error fetching data');
} else if (data.data.alerts && data.data.alerts.length > 0) {
const alertData = data.data.alerts[0];
const coordinatesString = alertData.area.substring(9, alertData.area.length - 2);
const coordinates = coordinatesString
.split(',')
.map((coord: string) => coord.trim().split(' '))
.map((pair: string[]) => ({
longitude: parseFloat(pair[0]),
latitude: parseFloat(pair[1]),
}));
const extendedCoordinatesString = alertData.extendedArea.substring(9, alertData.extendedArea.length - 2);
const extendedCoordinates = extendedCoordinatesString
.split(',')
.map((coord: string) => coord.trim().split(' '))
.map((pair: string[]) => ({
longitude: parseFloat(pair[0]),
latitude: parseFloat(pair[1]),
}));
setAlert(alertData);
setPolygon(coordinates);
setExtendedPolygon(extendedCoordinates);
setRegion({
latitude: coordinates[0]?.latitude || region.latitude,
longitude: coordinates[0]?.longitude || region.longitude,
latitudeDelta: 0.05,
longitudeDelta: 0.05,
});
} else {
Alert.alert('Error', 'No data found');
router.push('/alerts/index');
}
} catch (err) {
console.error('Fetch Map Data Error:', err);
}
}, [token, userId, region.latitude, region.longitude]);
useFocusEffect(
useCallback(() => {
checkAuth();
}, [checkAuth])
);
const { id } = useLocalSearchParams();
useEffect(() => {
if (typeof id === 'string') {
fetchAlert(id);
}
}, [id, fetchAlert]);
useEffect(() => {
if (mapRef.current && region) {
mapRef.current.animateToRegion(region, 1000);
}
}, [region]);
const formatDate = (timestamp: string) => {
const date = new Date(parseInt(timestamp, 10) * 1000);
return `${date.toDateString()} ${date.getHours()}:${(date.getMinutes() < 10 ? '0' : '') + date.getMinutes()}`;
};
const theme = useColorScheme() ?? 'light';
return (
<ParallaxScrollView>
{alert === null ? (
<ThemedView>
<ThemedText>Loading...</ThemedText>
</ThemedView>
) : (
<>
<ThemedView style={styles.dateRow}>
<Ionicons
name="chevron-back-outline"
size={18}
color="#0a7ea4"
style={styles.icon}
/>
<Link href="/alerts">
<ThemedText type="link">Alerts list</ThemedText>
</Link>
</ThemedView>
<ThemedView>
<MapView
ref={mapRef}
initialRegion={region}
style={styles.map}
>
<Polygon
coordinates={polygon}
strokeColor="#c0392b"
fillColor="rgba(192, 57, 43, 0.4)"
/>
<Polygon
coordinates={extendedPolygon}
strokeColor="#c0392b"
fillColor="rgba(192, 57, 43, 0.4)"
/>
</MapView>
</ThemedView>
<ThemedView style={styles.dateRow}>
<Ionicons
name="calendar-outline"
size={18}
color={theme === 'light' ? Colors.light.text : Colors.dark.text}
style={styles.icon}
/>
<ThemedText>{formatDate(alert.createdAt)}</ThemedText>
</ThemedView>
<ThemedView style={styles.dateRow}>
<Ionicons
name="alert-circle-outline"
size={18}
color={theme === 'light' ? Colors.light.text : Colors.dark.text}
style={styles.icon}
/>
<ThemedText>{alert.level}</ThemedText>
</ThemedView>
</>
)}
</ParallaxScrollView>
);
}
const styles = StyleSheet.create({
map: {
height: 400,
},
dateRow: {
flexDirection: 'row',
alignItems: 'center',
},
icon: {
marginRight: 8,
},
});
|
