mirror of
https://github.com/SamyRai/turash.git
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6347f42e20
- Remove nested git repository from bugulma/frontend/.git - Add all frontend files to main repository tracking - Convert from separate frontend/backend repos to unified monorepo - Preserve all frontend code and development history as tracked files - Eliminate nested repository complexity for simpler development workflow This creates a proper monorepo structure with frontend and backend coexisting in the same repository for easier development and deployment.
77 lines
2.3 KiB
TypeScript
77 lines
2.3 KiB
TypeScript
/**
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* Coordinate validation and utility functions
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* Ensures coordinates are within valid ranges and handles edge cases
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*/
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/**
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* Validates if a latitude is within valid range [-90, 90]
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*/
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export function isValidLatitude(lat: number): boolean {
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return typeof lat === 'number' && !isNaN(lat) && lat >= -90 && lat <= 90;
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}
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/**
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* Validates if a longitude is within valid range [-180, 180]
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*/
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export function isValidLongitude(lng: number): boolean {
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return typeof lng === 'number' && !isNaN(lng) && lng >= -180 && lng <= 180;
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}
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/**
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* Validates if a coordinate pair [lat, lng] is valid
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*/
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export function isValidCoordinate(lat: number, lng: number): boolean {
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return isValidLatitude(lat) && isValidLongitude(lng);
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}
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/**
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* Validates and normalizes a coordinate pair
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* Returns null if invalid, otherwise returns normalized [lat, lng]
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*/
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export function normalizeCoordinate(lat: number, lng: number): [number, number] | null {
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if (!isValidCoordinate(lat, lng)) {
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return null;
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}
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return [lat, lng];
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}
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/**
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* Checks if a coordinate is within viewport bounds
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*/
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export function isCoordinateInBounds(
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lat: number,
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lng: number,
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bounds: { north: number; south: number; east: number; west: number }
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): boolean {
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if (!isValidCoordinate(lat, lng)) return false;
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// Handle longitude wrapping (e.g., -180 to 180 crossing)
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const lngInBounds =
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(bounds.west <= bounds.east && lng >= bounds.west && lng <= bounds.east) ||
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(bounds.west > bounds.east && (lng >= bounds.west || lng <= bounds.east));
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return lat >= bounds.south && lat <= bounds.north && lngInBounds;
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}
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/**
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* Calculates distance between two coordinates using Haversine formula
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* Returns distance in kilometers
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*/
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export function calculateDistance(lat1: number, lng1: number, lat2: number, lng2: number): number {
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if (!isValidCoordinate(lat1, lng1) || !isValidCoordinate(lat2, lng2)) {
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return Infinity;
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}
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const R = 6371; // Earth's radius in km
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const dLat = ((lat2 - lat1) * Math.PI) / 180;
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const dLng = ((lng2 - lng1) * Math.PI) / 180;
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const a =
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Math.sin(dLat / 2) * Math.sin(dLat / 2) +
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Math.cos((lat1 * Math.PI) / 180) *
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Math.cos((lat2 * Math.PI) / 180) *
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Math.sin(dLng / 2) *
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Math.sin(dLng / 2);
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const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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return R * c;
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}
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