Andrie
57 lines
2.1 KiB
PHP
57 lines
2.1 KiB
PHP
<?php
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// koneksi.php — Koneksi database + Haversine helper
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if (!defined('DB_HOST')) require_once __DIR__ . '/config.php';
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mysqli_report(MYSQLI_REPORT_OFF);
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$conn = @new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME, DB_PORT);
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if ($conn->connect_error) {
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error_log('Database connection failed: ' . $conn->connect_error);
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http_response_code(500);
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die(json_encode([
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'status' => 'error',
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'message' => 'Koneksi database gagal. Hubungi administrator.'
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]));
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}
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$conn->set_charset('utf8mb4');
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function haversine_distance($lat1, $lon1, $lat2, $lon2) {
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$R = 6371000;
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$dLat = deg2rad($lat2 - $lat1);
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$dLon = deg2rad($lon2 - $lon1);
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$a = sin($dLat/2)**2 + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLon/2)**2;
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return $R * 2 * atan2(sqrt($a), sqrt(1 - $a));
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}
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// PRD-correct proximity: nearest ibadah whose radius covers the point wins;
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// among ties (equal distance), ORDER BY id ASC via strict < ensures smallest id.
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// jarak_m = distance to nearest-overall ibadah when blank spot.
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function calc_proximity(mysqli $conn, float $lat, float $lng): array {
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$res = $conn->query(
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"SELECT id, lat, lng, radius_m FROM rumah_ibadah WHERE deleted_at IS NULL ORDER BY id ASC"
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);
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$nearest_overall_dist = PHP_FLOAT_MAX;
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$best_in_radius = null;
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$best_in_radius_dist = PHP_FLOAT_MAX;
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while ($ri = $res->fetch_assoc()) {
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$d = haversine_distance($lat, $lng, (float)$ri['lat'], (float)$ri['lng']);
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if ($d < $nearest_overall_dist) $nearest_overall_dist = $d;
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if ($d <= (float)$ri['radius_m'] && $d < $best_in_radius_dist) {
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$best_in_radius_dist = $d;
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$best_in_radius = $ri;
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}
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}
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if ($best_in_radius) {
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return [
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'ibadah_id' => (int)$best_in_radius['id'],
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'jarak_m' => round($best_in_radius_dist, 2),
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'is_blank_spot' => 0,
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];
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}
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return [
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'ibadah_id' => null,
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'jarak_m' => $nearest_overall_dist < PHP_FLOAT_MAX ? round($nearest_overall_dist, 2) : null,
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'is_blank_spot' => 1,
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];
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}
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