65 lines
2.3 KiB
PHP
65 lines
2.3 KiB
PHP
<?php
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final class GeoService
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{
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public static function geocode(PDO $db, string $query): ?array
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{
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$q = trim(preg_replace('~\s+~', ' ', $query));
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if ($q === '') {
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return null;
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}
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// Garde-fou pour les bases anciennes dans lesquelles la table de cache
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// n'avait jamais été créée par une migration dédiée.
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$db->exec(
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"CREATE TABLE IF NOT EXISTS geocode_cache (q TEXT PRIMARY KEY, lat REAL, lng REAL, raw_json TEXT, fetched_at TEXT NOT NULL DEFAULT (datetime('now')))",
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);
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$st = $db->prepare('SELECT lat,lng FROM geocode_cache WHERE q=:q LIMIT 1');
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$st->execute([':q' => $q]);
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$row = $st->fetch(PDO::FETCH_ASSOC);
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if ($row && $row['lat'] !== null && $row['lng'] !== null) {
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return ['lat' => (float) $row['lat'], 'lng' => (float) $row['lng']];
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}
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$url = 'https://nominatim.openstreetmap.org/search?format=jsonv2&limit=1&q=' . rawurlencode($q);
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_FOLLOWLOCATION => true,
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CURLOPT_TIMEOUT => 10,
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CURLOPT_CONNECTTIMEOUT => 5,
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CURLOPT_HTTPHEADER => ['Accept: application/json', 'User-Agent: Globinours/1.0 (contact: local-refuge)'],
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]);
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$body = curl_exec($ch);
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if ($body === false) {
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curl_close($ch);
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return null;
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}
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$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($code < 200 || $code >= 300) {
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return null;
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}
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$json = json_decode($body, true);
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if (!is_array($json) || empty($json[0]['lat']) || empty($json[0]['lon'])) {
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$db->prepare(
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"INSERT OR REPLACE INTO geocode_cache(q,lat,lng,raw_json,fetched_at) VALUES(:q,NULL,NULL,:raw,datetime('now'))",
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)->execute([':q' => $q, ':raw' => $body]);
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return null;
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}
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$lat = (float) $json[0]['lat'];
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$lng = (float) $json[0]['lon'];
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$db->prepare(
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"INSERT OR REPLACE INTO geocode_cache(q,lat,lng,raw_json,fetched_at) VALUES(:q,:lat,:lng,:raw,datetime('now'))",
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)->execute([':q' => $q, ':lat' => $lat, ':lng' => $lng, ':raw' => $body]);
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return ['lat' => $lat, 'lng' => $lng];
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}
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}
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