dev add geo country service

src/main/java/ru/soune/nocopy/service/geo/GeoCountryService.java

@@ -14,8 +14,8 @@ import java.util.concurrent.ConcurrentHashMap;
 @Service
 @Slf4j
 public class GeoCountryService {
-    private DatabaseReader dbReader;
 
+    private DatabaseReader dbReader;
     private final Map<String, String> cache = new ConcurrentHashMap<>();
 
     @PostConstruct
@@ -23,19 +23,18 @@ public class GeoCountryService {
         try {
             var resource = new ClassPathResource("geo/GeoLite2-Country.mmdb");
             this.dbReader = new DatabaseReader.Builder(resource.getInputStream()).build();
-            log.info("Geo DB loaded");
         } catch (Exception e) {
             log.error("Failed to load Geo DB", e);
-            throw new RuntimeException(e);
         }
     }
 
-    public String getCountry(String url) {
-        if (url == null || url.isBlank()) {
+    public String getCountry(String input) {
+        if (input == null || input.isBlank()) {
             return null;
         }
 
-        String host = extractHost(url);
+        String host = extractHost(input);
+
         if (cache.containsKey(host)) {
             return cache.get(host);
         }
@@ -45,18 +44,21 @@ public class GeoCountryService {
             CountryResponse response = dbReader.country(ip);
             String country = response.getCountry().getIsoCode();
 
-            cache.put(host, country);
+            cache.put(host, country != null ? country : "");
+            log.debug("{} → {}", host, country);
             return country;
 
         } catch (Exception e) {
-            log.debug("Cannot determine country for: {}", host);
-            cache.put(host, null);
+            cache.put(host, "");
             return null;
         }
     }
 
-    private String extractHost(String url) {
-        String cleaned = url.replaceFirst("^https?://", "");
-        return cleaned.split("[/:]")[0];
+    private String extractHost(String input) {
+        String s = input.replaceFirst("^https?://", "");
+        s = s.split("/")[0];
+        s = s.split(":")[0];
+
+        return s;
     }
 }