cygouw
38 lines
1.5 KiB
PHP
38 lines
1.5 KiB
PHP
<?php
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require_once __DIR__ . '/config.php';
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// ── Haversine distance (meter) ──────────────
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function haversine(float $lat1, float $lng1, float $lat2, float $lng2): float {
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$R = 6371000;
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$dLat = deg2rad($lat2 - $lat1);
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$dLng = deg2rad($lng2 - $lng1);
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$a = sin($dLat/2)**2 + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLng/2)**2;
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return $R * 2 * atan2(sqrt($a), sqrt(1-$a));
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}
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// ── Cari rumah ibadah terdekat yang menjangkau koordinat ──
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// Hanya rumah ibadah yang sudah verified
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function findNearestIbadah(PDO $db, float $lat, float $lng): ?int {
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$ibadahs = $db->query("SELECT id, lat, lng, radius FROM rumah_ibadah WHERE status = 'verified'")->fetchAll();
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$nearest = null;
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$minDist = PHP_FLOAT_MAX;
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foreach ($ibadahs as $ib) {
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$d = haversine($lat, $lng, (float)$ib['lat'], (float)$ib['lng']);
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if ($d <= $ib['radius'] && $d < $minDist) {
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$nearest = (int)$ib['id'];
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$minDist = $d;
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}
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}
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return $nearest;
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}
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// ── Re-assign SEMUA warga verified (dipanggil saat radius/ibadah berubah) ──
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function reassignAllWarga(PDO $db): void {
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$wargas = $db->query("SELECT id, lat, lng FROM warga_miskin WHERE status = 'verified'")->fetchAll();
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$stmt = $db->prepare("UPDATE warga_miskin SET ibadah_id = ? WHERE id = ?");
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foreach ($wargas as $w) {
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$ibadahId = findNearestIbadah($db, (float)$w['lat'], (float)$w['lng']);
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$stmt->execute([$ibadahId, $w['id']]);
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}
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}
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