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* LocationSelectorModal - 位置选择模态框
*
* 功能：
* - 获取当前GPS位置
* - 搜索真实地理地址
* - 显示附近位置
* - 反向地理编码
*/
import React, { useState, useCallback, useEffect, useRef, useMemo } from 'react';
import {
Modal,
View,
Text,
TextInput,
FlatList,
TouchableOpacity,
StyleSheet,
ActivityIndicator,
Alert,
Keyboard,
} from 'react-native';
import { X, Search, MapPin, Navigation } from '@tamagui/lucide-icons';
import { BlurView } from 'expo-blur';
import * as ExpoLocation from 'expo-location';
import { useThemeColors, useIsDarkMode } from '@/src/hooks/useThemeColors';
interface Location {
id: string;
name: string;
address?: string;
distance?: string;
lat?: number;
lon?: number;
}
interface NominatimResult {
place_id: number;
display_name: string;
name?: string;
lat: string;
lon: string;
address?: {
road?: string;
suburb?: string;
city?: string;
county?: string;
state?: string;
country?: string;
postcode?: string;
neighbourhood?: string;
village?: string;
suffix?: string;
district?: string;
};
}
interface LocationSelectorModalProps {
visible: boolean;
onClose: () => void;
onConfirm: (location: Location) => void;
initialLocation?: Location;
}
// 计算两点之间的距离（米）
function calculateDistance(lat1: number, lon1: number, lat2: number, lon2: number): number {
const R = 6371000; // 地球半径（米）
const dLat = ((lat2 - lat1) * Math.PI) / 180;
const dLon = ((lon2 - lon1) * Math.PI) / 180;
const a =
Math.sin(dLat / 2) * Math.sin(dLat / 2) +
Math.cos((lat1 * Math.PI) / 180) *
Math.cos((lat2 * Math.PI) / 180) *
Math.sin(dLon / 2) *
Math.sin(dLon / 2);
const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
return R * c;
}
// 格式化距离显示
function formatDistance(meters: number): string {
if (meters < 1000) {
return `${Math.round(meters)}m`;
}
return `${(meters / 1000).toFixed(1)}km`;
}
export function LocationSelectorModal({
visible,
onClose,
onConfirm,
initialLocation,
}: LocationSelectorModalProps) {
const colors = useThemeColors();
const isDark = useIsDarkMode();
const [searchQuery, setSearchQuery] = useState('');
const [selectedLocation, setSelectedLocation] = useState<Location | null>(
initialLocation || null
);
const [isLocating, setIsLocating] = useState(false);
const [isSearching, setIsSearching] = useState(false);
const [currentCoords, setCurrentCoords] = useState<{ lat: number; lon: number } | null>(null);
const [currentLocation, setCurrentLocation] = useState<Location | null>(null);
const [nearbyLocations, setNearbyLocations] = useState<Location[]>([]);
const [searchResults, setSearchResults] = useState<Location[]>([]);
const searchTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
// 样式定义
const dynamicStyles = useMemo(() => {
return StyleSheet.create({
backdrop: {
flex: 1,
backgroundColor: colors.overlay as any,
justifyContent: 'flex-end',
},
container: {
backgroundColor: colors.cardBackground as any,
borderTopLeftRadius: 24,
borderTopRightRadius: 24,
height: '80%',
paddingTop: 20,
},
header: {
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
paddingHorizontal: 20,
paddingBottom: 16,
borderBottomWidth: StyleSheet.hairlineWidth,
borderBottomColor: colors.border as any,
},
headerTitle: {
fontSize: 18,
fontWeight: '700',
color: colors.text as any,
},
closeButton: {
position: 'absolute',
right: 20,
width: 40,
height: 40,
alignItems: 'center',
justifyContent: 'center',
},
searchContainer: {
flexDirection: 'row',
alignItems: 'center',
backgroundColor: colors.backgroundMuted as any,
marginHorizontal: 20,
marginTop: 16,
marginBottom: 12,
paddingHorizontal: 14,
paddingVertical: 12,
borderRadius: 12,
},
searchInput: {
flex: 1,
fontSize: 15,
color: colors.text as any,
marginLeft: 10,
marginRight: 10,
},
locateButton: {
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
marginHorizontal: 20,
marginBottom: 12,
paddingVertical: 10,
paddingHorizontal: 16,
backgroundColor: (isDark ? '#3D2A1F' : colors.primaryLight) as any,
borderRadius: 10,
},
locateButtonText: {
fontSize: 14,
fontWeight: '600',
color: colors.primary as any,
marginLeft: 8,
},
content: {
flex: 1,
},
section: {
paddingHorizontal: 20,
paddingTop: 8,
paddingBottom: 8,
},
sectionTitle: {
fontSize: 13,
fontWeight: '600',
color: colors.textSecondary as any,
textTransform: 'uppercase',
letterSpacing: 0.5,
},
currentLocationItem: {
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'space-between',
paddingVertical: 12,
paddingHorizontal: 14,
marginTop: 8,
backgroundColor: (isDark ? '#0D2818' : colors.successMuted) as any,
borderRadius: 12,
borderWidth: 2,
borderColor: 'transparent',
},
currentIcon: {
backgroundColor: colors.success as any,
borderRadius: 8,
padding: 6,
marginRight: 12,
},
currentTag: {
fontSize: 12,
fontWeight: '600',
color: colors.success as any,
backgroundColor: (isDark ? '#0D2818' : colors.successMuted) as any,
paddingHorizontal: 8,
paddingVertical: 4,
borderRadius: 6,
},
list: {
flex: 1,
},
listContent: {
paddingHorizontal: 20,
paddingBottom: 16,
},
locationItem: {
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'space-between',
paddingVertical: 12,
paddingHorizontal: 14,
marginBottom: 8,
backgroundColor: colors.backgroundSubtle as any,
borderRadius: 12,
borderWidth: 2,
borderColor: 'transparent',
},
locationItemSelected: {
backgroundColor: (isDark ? '#3D2A1F' : colors.primaryLight) as any,
borderColor: colors.primary as any,
},
locationLeft: {
flexDirection: 'row',
alignItems: 'center',
flex: 1,
},
iconContainer: {
marginRight: 12,
},
locationInfo: {
flex: 1,
},
locationName: {
fontSize: 15,
fontWeight: '500',
color: colors.text as any,
marginBottom: 2,
},
locationNameSelected: {
color: colors.primary as any,
fontWeight: '600',
},
locationAddress: {
fontSize: 12,
color: colors.textTertiary as any,
lineHeight: 16,
},
distance: {
fontSize: 12,
color: colors.textSecondary as any,
fontWeight: '500',
marginLeft: 8,
backgroundColor: colors.borderMuted as any,
paddingHorizontal: 8,
paddingVertical: 4,
borderRadius: 6,
},
emptyState: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
paddingHorizontal: 40,
},
emptyText: {
fontSize: 16,
fontWeight: '500',
color: colors.textSecondary as any,
marginTop: 16,
textAlign: 'center',
},
emptyHint: {
fontSize: 14,
color: colors.textTertiary as any,
marginTop: 8,
textAlign: 'center',
},
footer: {
paddingHorizontal: 20,
paddingTop: 16,
paddingBottom: 24,
borderTopWidth: StyleSheet.hairlineWidth,
borderTopColor: colors.border as any,
},
confirmButton: {
backgroundColor: colors.primary as any,
paddingVertical: 14,
borderRadius: 12,
alignItems: 'center',
},
confirmButtonDisabled: {
backgroundColor: colors.border as any,
},
confirmButtonText: {
fontSize: 16,
fontWeight: '600',
color: '#FFFFFF',
},
confirmButtonTextDisabled: {
color: colors.textTertiary as any,
},
});
}, [colors, isDark]);
// 通过 Nominatim API 获取地址
const fetchAddressFromNominatim = async (
latitude: number,
longitude: number
): Promise<Location> => {
try {
const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 8000);
const response = await fetch(
`https://nominatim.openstreetmap.org/reverse?lat=${latitude}&lon=${longitude}&format=json&addressdetails=1&accept-language=zh-CN`,
{
headers: {
'User-Agent': 'PetLoveApp/1.0',
},
signal: controller.signal,
}
);
clearTimeout(timeoutId);
const data: NominatimResult = await response.json();
if (data && data.address) {
const addr = data.address;
const locationName =
addr?.road || addr?.suburb || addr?.district || data.name || '当前位置';
const fullAddress = [addr?.city || addr?.county, addr?.district || addr?.suburb, addr?.road]
.filter(Boolean)
.join(' ');
return {
id: 'current',
name: locationName,
address: fullAddress || data.display_name,
lat: latitude,
lon: longitude,
};
}
} catch (error) {
console.log('Nominatim geocoding failed:', error);
}
// 最终回退：使用坐标
return {
id: 'current',
name: '当前位置',
address: `纬度 ${latitude.toFixed(4)}, 经度 ${longitude.toFixed(4)}`,
lat: latitude,
lon: longitude,
};
};
// 获取当前位置
const getCurrentLocation = useCallback(async () => {
setIsLocating(true);
try {
const { status } = await ExpoLocation.requestForegroundPermissionsAsync();
if (status !== 'granted') {
Alert.alert('权限被拒绝', '需要位置权限来获取当前位置，请在设置中开启');
setIsLocating(false);
return;
}
const location = await ExpoLocation.getCurrentPositionAsync({
accuracy: ExpoLocation.Accuracy.High,
});
const { latitude, longitude } = location.coords;
setCurrentCoords({ lat: latitude, lon: longitude });
// 首先尝试使用 expo-location 的原生反向地理编码（更快更可靠）
let current: Location;
try {
const nativeAddresses = await ExpoLocation.reverseGeocodeAsync({
latitude,
longitude,
});
if (nativeAddresses && nativeAddresses.length > 0) {
const addr = nativeAddresses[0];
const locationName = addr.street || addr.district || addr.city || '当前位置';
const fullAddress = [addr.city, addr.district, addr.street, addr.name]
.filter(Boolean)
.join(' ');
current = {
id: 'current',
name: locationName,
address: fullAddress || `${addr.city || ''}`.trim(),
lat: latitude,
lon: longitude,
};
} else {
// 如果原生反向地理编码没有返回结果，尝试 Nominatim API
current = await fetchAddressFromNominatim(latitude, longitude);
}
} catch (nativeError) {
console.log('Native geocoding failed, trying Nominatim:', nativeError);
// 如果原生反向地理编码失败，尝试 Nominatim API
current = await fetchAddressFromNominatim(latitude, longitude);
}
setCurrentLocation(current);
setSelectedLocation(current);
// 获取附近位置（不阻塞主流程）
fetchNearbyLocations(latitude, longitude).catch(() => {});
} catch (error) {
console.error('Failed to get location:', error);
Alert.alert('定位失败', '无法获取当前位置，请检查网络连接或手动搜索位置');
} finally {
setIsLocating(false);
}
}, []);
// 获取附近位置
const fetchNearbyLocations = async (lat: number, lon: number) => {
const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 5000); // 减少到5秒
try {
// 搜索附近的 POI（兴趣点）
const response = await fetch(
`https://nominatim.openstreetmap.org/search?q=*&format=json&addressdetails=1&limit=15&bounded=1&viewbox=${lon - 0.02},${lat + 0.02},${lon + 0.02},${lat - 0.02}&accept-language=zh-CN`,
{
headers: {
'User-Agent': 'PetLoveApp/1.0',
},
signal: controller.signal,
}
);
clearTimeout(timeoutId);
const data: NominatimResult[] = await response.json();
if (data && data.length > 0) {
const locations: Location[] = data
.filter((item) => item.name || item.address?.road)
.map((item) => {
const addr = item.address;
const distance = calculateDistance(
lat,
lon,
parseFloat(item.lat),
parseFloat(item.lon)
);
return {
id: item.place_id.toString(),
name: item.name || addr?.road || addr?.suburb || '未知地点',
address: [addr?.city, addr?.district, addr?.road].filter(Boolean).join(' '),
distance: formatDistance(distance),
lat: parseFloat(item.lat),
lon: parseFloat(item.lon),
};
})
.sort((a, b) => {
const distA = parseFloat(a.distance?.replace(/[^0-9.]/g, '') || '0');
const distB = parseFloat(b.distance?.replace(/[^0-9.]/g, '') || '0');
return distA - distB;
});
setNearbyLocations(locations);
}
} catch (error) {
// 静默处理错误，不影响主流程
if (error instanceof Error && error.name !== 'AbortError') {
console.log('Failed to fetch nearby locations:', error.message);
}
} finally {
clearTimeout(timeoutId);
}
};
// 搜索地址
const searchLocations = useCallback(
async (query: string) => {
if (!query.trim()) {
setSearchResults([]);
return;
}
setIsSearching(true);
const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 8000);
try {
const response = await fetch(
`https://nominatim.openstreetmap.org/search?q=${encodeURIComponent(query)}&format=json&addressdetails=1&limit=20&accept-language=zh-CN`,
{
headers: {
'User-Agent': 'PetLoveApp/1.0',
},
signal: controller.signal,
}
);
clearTimeout(timeoutId);
const data: NominatimResult[] = await response.json();
if (data && data.length > 0) {
const locations: Location[] = data.map((item) => {
const addr = item.address;
const distance = currentCoords
? formatDistance(
calculateDistance(
currentCoords.lat,
currentCoords.lon,
parseFloat(item.lat),
parseFloat(item.lon)
)
)
: undefined;
return {
id: item.place_id.toString(),
name: item.name || addr?.road || addr?.suburb || item.display_name.split(',')[0],
address: item.display_name,
distance,
lat: parseFloat(item.lat),
lon: parseFloat(item.lon),
};
});
setSearchResults(locations);
} else {
setSearchResults([]);
}
} catch (error) {
console.error('Failed to search locations:', error);
setSearchResults([]);
} finally {
setIsSearching(false);
}
},
[currentCoords]
);
// 搜索防抖
useEffect(() => {
Iif (searchTimeoutRef.current) {
clearTimeout(searchTimeoutRef.current);
}
Iif (searchQuery.trim()) {
searchTimeoutRef.current = setTimeout(() => {
searchLocations(searchQuery);
}, 500);
} else {
setSearchResults([]);
}
return () => {
Iif (searchTimeoutRef.current) {
clearTimeout(searchTimeoutRef.current);
}
};
}, [searchQuery, searchLocations]);
// 打开时自动获取位置
useEffect(() => {
Iif (visible && !currentLocation) {
getCurrentLocation();
}
}, [visible, currentLocation, getCurrentLocation]);
const handleLocationSelect = useCallback((location: Location) => {
setSelectedLocation(location);
Keyboard.dismiss();
}, []);
const handleConfirm = useCallback(() => {
if (selectedLocation) {
onConfirm(selectedLocation);
onClose();
}
}, [selectedLocation, onConfirm, onClose]);
const displayLocations = searchQuery.trim() ? searchResults : nearbyLocations;
const renderLocationItem = useCallback(
({ item }: { item: Location }) => {
const isSelected = selectedLocation?.id === item.id;
return (
<TouchableOpacity
style={[dynamicStyles.locationItem, isSelected && dynamicStyles.locationItemSelected]}
onPress={() => handleLocationSelect(item)}
activeOpacity={0.7}
>
<View style={dynamicStyles.locationLeft}>
<View style={dynamicStyles.iconContainer}>
<MapPin
size={20}
color={(isSelected ? colors.primary : colors.textTertiary) as any}
strokeWidth={2}
/>
</View>
<View style={dynamicStyles.locationInfo}>
<Text
style={[
dynamicStyles.locationName,
isSelected && dynamicStyles.locationNameSelected,
]}
numberOfLines={1}
>
{item.name}
</Text>
{item.address && (
<Text style={dynamicStyles.locationAddress} numberOfLines={2}>
{item.address}
</Text>
)}
</View>
</View>
{item.distance && <Text style={dynamicStyles.distance}>{item.distance}</Text>}
</TouchableOpacity>
);
},
[selectedLocation, handleLocationSelect, dynamicStyles, colors]
);
const renderCurrentLocation = () => {
if (!currentLocation) return null;
const isSelected = selectedLocation?.id === currentLocation.id;
return (
<TouchableOpacity
style={[
dynamicStyles.currentLocationItem,
isSelected && dynamicStyles.locationItemSelected,
]}
onPress={() => handleLocationSelect(currentLocation)}
activeOpacity={0.7}
>
<View style={dynamicStyles.locationLeft}>
<View style={[dynamicStyles.iconContainer, dynamicStyles.currentIcon]}>
<Navigation size={18} color="#FFFFFF" strokeWidth={2} />
</View>
<View style={dynamicStyles.locationInfo}>
<Text
style={[dynamicStyles.locationName, isSelected && dynamicStyles.locationNameSelected]}
>
{currentLocation.name}
</Text>
<Text style={dynamicStyles.locationAddress} numberOfLines={1}>
{currentLocation.address}
</Text>
</View>
</View>
<Text style={dynamicStyles.currentTag}>当前</Text>
</TouchableOpacity>
);
};
Eif (!visible) return null;
return (
<Modal visible={visible} animationType="slide" transparent onRequestClose={onClose}>
<BlurView intensity={20} style={dynamicStyles.backdrop}>
<View style={dynamicStyles.container}>
<View style={dynamicStyles.header}>
<Text style={dynamicStyles.headerTitle}>选择位置</Text>
<TouchableOpacity
style={dynamicStyles.closeButton}
onPress={onClose}
activeOpacity={0.7}
>
<X size={24} color={colors.text as any} strokeWidth={2} />
</TouchableOpacity>
</View>
<View style={dynamicStyles.searchContainer}>
<Search size={20} color={colors.textTertiary as any} strokeWidth={2} />
<TextInput
style={dynamicStyles.searchInput}
value={searchQuery}
onChangeText={setSearchQuery}
placeholder="搜索地址、街道、城市..."
placeholderTextColor={colors.textTertiary as any}
returnKeyType="search"
/>
{isSearching && <ActivityIndicator size="small" color={colors.primary} />}
</View>
{/* 定位按钮 */}
<TouchableOpacity
style={dynamicStyles.locateButton}
onPress={getCurrentLocation}
disabled={isLocating}
activeOpacity={0.7}
>
{isLocating ? (
<ActivityIndicator size="small" color={colors.primary} />
) : (
<Navigation size={20} color={colors.primary as any} strokeWidth={2} />
)}
<Text style={dynamicStyles.locateButtonText}>
{isLocating ? '定位中...' : '重新定位'}
</Text>
</TouchableOpacity>
<View style={dynamicStyles.content}>
{/* 当前位置 */}
{currentLocation && !searchQuery && (
<View style={dynamicStyles.section}>
<Text style={dynamicStyles.sectionTitle}>当前位置</Text>
{renderCurrentLocation()}
</View>
)}
{/* 搜索结果或附近位置 */}
<View style={dynamicStyles.section}>
<Text style={dynamicStyles.sectionTitle}>
{searchQuery ? '搜索结果' : '附近位置'}
{isSearching && ' (搜索中...)'}
</Text>
</View>
{displayLocations.length > 0 ? (
<FlatList
data={displayLocations}
renderItem={renderLocationItem}
keyExtractor={(item) => item.id}
style={dynamicStyles.list}
contentContainerStyle={dynamicStyles.listContent}
showsVerticalScrollIndicator={false}
keyboardShouldPersistTaps="handled"
/>
) : (
<View style={dynamicStyles.emptyState}>
{isLocating || isSearching ? (
<ActivityIndicator size="large" color={colors.primary} />
) : (
<>
<MapPin size={48} color={colors.textTertiary as any} strokeWidth={1.5} />
<Text style={dynamicStyles.emptyText}>
{searchQuery ? '未找到相关位置' : '正在获取附近位置...'}
</Text>
<Text style={dynamicStyles.emptyHint}>
{searchQuery ? '请尝试其他关键词' : '请确保已开启定位权限'}
</Text>
</>
)}
</View>
)}
</View>
<View style={dynamicStyles.footer}>
<TouchableOpacity
style={[
dynamicStyles.confirmButton,
!selectedLocation && dynamicStyles.confirmButtonDisabled,
]}
onPress={handleConfirm}
disabled={!selectedLocation}
activeOpacity={0.8}
>
<Text
style={[
dynamicStyles.confirmButtonText,
!selectedLocation && dynamicStyles.confirmButtonTextDisabled,
]}
>
确定
</Text>
</TouchableOpacity>
</View>
</View>
</BlurView>
</Modal>
);
}
|