Convert GalleryPageUrlParser to kotlin

app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageUrlParser.kt

@@ -13,58 +13,38 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+package com.hippo.ehviewer.client.parser
 
-package com.hippo.ehviewer.client.parser;
-
-import androidx.annotation.Nullable;
-
-import com.hippo.ehviewer.client.EhUrl;
-import com.hippo.yorozuya.NumberUtils;
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import com.hippo.ehviewer.client.EhUrl
+import com.hippo.yorozuya.NumberUtils
+import java.util.regex.Pattern
 
 /**
  * Like http://exhentai.org/s/91ea4b6d89/901103-12
  */
-public final class GalleryPageUrlParser {
+object GalleryPageUrlParser {
+    private val URL_STRICT_PATTERN = Pattern.compile(
+        "https?://(?:" + EhUrl.DOMAIN_EX + "|" + EhUrl.DOMAIN_E + "|" + EhUrl.DOMAIN_LOFI + ")/s/([0-9a-f]{10})/(\\d+)-(\\d+)",
+    )
+    private val URL_PATTERN = Pattern.compile("([0-9a-f]{10})/(\\d+)-(\\d+)")
 
-    private static final Pattern URL_STRICT_PATTERN = Pattern.compile(
-            "https?://(?:" + EhUrl.DOMAIN_EX + "|" + EhUrl.DOMAIN_E + "|" + EhUrl.DOMAIN_LOFI + ")/s/([0-9a-f]{10})/(\\d+)-(\\d+)");
-
-    private static final Pattern URL_PATTERN = Pattern.compile(
-            "([0-9a-f]{10})/(\\d+)-(\\d+)");
-
-    @Nullable
-    public static Result parse(String url) {
-        return parse(url, true);
-    }
-
-    @Nullable
-    public static Result parse(String url, boolean strict) {
-        if (url == null) {
-            return null;
-        }
-
-        Pattern pattern = strict ? URL_STRICT_PATTERN : URL_PATTERN;
-        Matcher m = pattern.matcher(url);
-        if (m.find()) {
-            Result result = new Result();
-            result.gid = NumberUtils.parseLongSafely(m.group(2), -1L);
-            result.pToken = m.group(1);
-            result.page = NumberUtils.parseIntSafely(m.group(3), 0) - 1;
-            if (result.gid < 0 || result.page < 0) {
-                return null;
+    fun parse(url: String?, strict: Boolean = true): Result? {
+        url ?: return null
+        val pattern = if (strict) URL_STRICT_PATTERN else URL_PATTERN
+        val m = pattern.matcher(url)
+        return if (m.find()) {
+            val gid = NumberUtils.parseLongSafely(m.group(2), -1L)
+            val pToken = m.group(1)!!
+            val page = NumberUtils.parseIntSafely(m.group(3), 0) - 1
+            if (gid < 0 || page < 0) {
+                null
+            } else {
+                Result(gid, pToken, page)
             }
-            return result;
         } else {
-            return null;
+            null
         }
     }
 
-    public static class Result {
-        public long gid;
-        public String pToken;
-        public int page;
-    }
+    class Result(val gid: Long, val pToken: String, val page: Int)
 }