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
|
import { type LngLatLike } from "maplibre-gl";
import {
createContext,
useCallback,
useContext,
useEffect,
useRef,
useState,
type ReactNode,
} from "react";
interface MapState {
paths: Record<string, { center: LngLatLike; zoom: number }>;
userLocation: LngLatLike | null;
hasLocationPermission: boolean;
}
interface MapContextProps {
mapState: MapState;
setUserLocation: (location: LngLatLike | null) => void;
setLocationPermission: (hasPermission: boolean) => void;
updateMapState: (center: LngLatLike, zoom: number, path: string) => void;
requestLocation: () => void;
}
const MapContext = createContext<MapContextProps | undefined>(undefined);
export const MapProvider = ({ children }: { children: ReactNode }) => {
const [mapState, setMapState] = useState<MapState>(() => {
const savedMapState = localStorage.getItem("mapState");
if (savedMapState) {
try {
const parsed = JSON.parse(savedMapState);
return {
paths: parsed.paths || {},
userLocation: parsed.userLocation || null,
hasLocationPermission: parsed.hasLocationPermission || false,
};
} catch (e) {
console.error("Error parsing saved map state", e);
}
}
return {
paths: {},
userLocation: null,
hasLocationPermission: false,
};
});
const watchIdRef = useRef<number | null>(null);
const setUserLocation = useCallback((userLocation: LngLatLike | null) => {
setMapState((prev) => {
const newState = { ...prev, userLocation };
localStorage.setItem("mapState", JSON.stringify(newState));
return newState;
});
}, []);
const setLocationPermission = useCallback(
(hasLocationPermission: boolean) => {
setMapState((prev) => {
const newState = { ...prev, hasLocationPermission };
localStorage.setItem("mapState", JSON.stringify(newState));
return newState;
});
},
[]
);
const updateMapState = useCallback(
(center: LngLatLike, zoom: number, path: string) => {
setMapState((prev) => {
const newState = {
...prev,
paths: {
...prev.paths,
[path]: { center, zoom },
},
};
localStorage.setItem("mapState", JSON.stringify(newState));
return newState;
});
},
[]
);
const startWatching = useCallback(() => {
if (!navigator.geolocation || watchIdRef.current !== null) return;
watchIdRef.current = navigator.geolocation.watchPosition(
(position) => {
const { latitude, longitude } = position.coords;
setUserLocation([latitude, longitude]);
setLocationPermission(true);
},
(error) => {
if (error.code === GeolocationPositionError.PERMISSION_DENIED) {
setLocationPermission(false);
}
},
{ enableHighAccuracy: false, maximumAge: 30000, timeout: 15000 }
);
}, [setUserLocation, setLocationPermission]);
const requestLocation = useCallback(() => {
if (typeof window === "undefined" || !("geolocation" in navigator)) return;
navigator.geolocation.getCurrentPosition(
(pos) => {
setUserLocation([pos.coords.latitude, pos.coords.longitude]);
setLocationPermission(true);
startWatching();
},
() => {
setLocationPermission(false);
},
{ enableHighAccuracy: false, maximumAge: 60000, timeout: 10000 }
);
}, [setUserLocation, setLocationPermission, startWatching]);
const hasPermissionRef = useRef(mapState.hasLocationPermission);
// On mount: subscribe to permission changes and auto-start watching if already granted
useEffect(() => {
if (typeof window === "undefined" || !("geolocation" in navigator)) return;
let permissionStatus: PermissionStatus | null = null;
const onPermChange = () => {
if (permissionStatus?.state === "granted") {
setLocationPermission(true);
startWatching();
} else if (permissionStatus?.state === "denied") {
setLocationPermission(false);
if (watchIdRef.current !== null) {
navigator.geolocation.clearWatch(watchIdRef.current);
watchIdRef.current = null;
}
}
};
const init = async () => {
try {
if (navigator.permissions?.query) {
permissionStatus = await navigator.permissions.query({
name: "geolocation",
});
if (permissionStatus.state === "granted") {
setLocationPermission(true);
startWatching();
} else if (permissionStatus.state === "denied") {
setLocationPermission(false);
}
permissionStatus.addEventListener("change", onPermChange);
} else if (hasPermissionRef.current) {
startWatching();
}
} catch {
if (hasPermissionRef.current) {
startWatching();
}
}
};
init();
return () => {
if (watchIdRef.current !== null) {
navigator.geolocation.clearWatch(watchIdRef.current);
watchIdRef.current = null;
}
permissionStatus?.removeEventListener("change", onPermChange);
};
}, [startWatching, setLocationPermission]);
return (
<MapContext.Provider
value={{
mapState,
setUserLocation,
setLocationPermission,
updateMapState,
requestLocation,
}}
>
{children}
</MapContext.Provider>
);
};
export const useMap = () => {
const context = useContext(MapContext);
if (!context) {
throw new Error("useMap must be used within a MapProvider");
}
return context;
};
|
