91 lines
3.2 KiB
PHP
91 lines
3.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App;
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final class Search
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{
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public function __construct(private ?\PDO $pdo) {}
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public function searchEvents(string $query, int $limit = 100, ?array $geo = null): array
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{
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if (!$this->pdo) return [];
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$q = trim($query);
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$hasGeo = isset($geo['lat'], $geo['lng']) && is_numeric($geo['lat']) && is_numeric($geo['lng']);
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if ($q === '' && !$hasGeo) return [];
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$tokens = array_filter(preg_split('/\s+/', $q) ?: [], fn($t) => $t !== '');
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if (!$tokens) {
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$tokens = [$q];
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}
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$conditions = [];
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$bind = [];
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$i = 0;
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foreach ($tokens as $tok) {
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$tok = trim($tok);
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if ($tok === '') continue;
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$conditions[] = "(title LIKE :t{$i}a OR teaser_public LIKE :t{$i}b OR description LIKE :t{$i}c OR city LIKE :t{$i}d OR region LIKE :t{$i}e OR zip LIKE :t{$i}f)";
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$bind["t{$i}a"] = '%' . $tok . '%';
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$bind["t{$i}b"] = '%' . $tok . '%';
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$bind["t{$i}c"] = '%' . $tok . '%';
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$bind["t{$i}d"] = '%' . $tok . '%';
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$bind["t{$i}e"] = '%' . $tok . '%';
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$bind["t{$i}f"] = '%' . $tok . '%';
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$i++;
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}
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$whereParts = [
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"starts_at >= NOW()",
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"status != 'cancelled'",
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];
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if ($conditions) {
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$whereParts[] = implode(' AND ', $conditions);
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}
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$sql = "SELECT id, title, teaser_public, description, city, region, zip, starts_at, visibility, allow_kids, location_label, lat, lng";
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$distanceFiltering = false;
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if ($hasGeo) {
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$lat = (float)$geo['lat'];
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$lng = (float)$geo['lng'];
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$radius = isset($geo['radius']) && is_numeric($geo['radius']) ? max(0.1, (float)$geo['radius']) : 5.0;
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$sql .= ",
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(6371 * ACOS(LEAST(1,
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COS(RADIANS(:glat)) * COS(RADIANS(lat)) * COS(RADIANS(lng) - RADIANS(:glng)) +
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SIN(RADIANS(:glat)) * SIN(RADIANS(lat))
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))) AS distance_km";
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$distanceFiltering = true;
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$latRange = $radius / 111.0;
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$lngRange = $radius / (111.0 * max(0.1, cos($lat * M_PI / 180)));
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$whereParts[] = "(lat IS NOT NULL AND lng IS NOT NULL)";
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$whereParts[] = "(lat BETWEEN :latMin AND :latMax)";
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$whereParts[] = "(lng BETWEEN :lngMin AND :lngMax)";
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$bind['glat'] = $lat;
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$bind['glng'] = $lng;
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$bind['latMin'] = $lat - $latRange;
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$bind['latMax'] = $lat + $latRange;
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$bind['lngMin'] = $lng - $lngRange;
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$bind['lngMax'] = $lng + $lngRange;
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$bind['radius'] = $radius;
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}
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$where = $whereParts ? ('WHERE ' . implode(' AND ', $whereParts)) : '';
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$sql .= " FROM events $where";
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if ($distanceFiltering) {
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$sql .= " HAVING distance_km <= :radius";
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$sql .= " ORDER BY distance_km ASC, starts_at ASC";
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} else {
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$sql .= " ORDER BY starts_at ASC";
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}
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$sql .= " LIMIT :lim";
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$bind['lim'] = (int)$limit;
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$stmt = $this->pdo->prepare($sql);
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$stmt->execute($bind);
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return $stmt->fetchAll(\PDO::FETCH_ASSOC) ?: [];
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}
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}
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