Add image search

app/src/main/java/com/hippo/ehviewer/client/EhUrl.java

@@ -16,6 +16,8 @@
 
 package com.hippo.ehviewer.client;
 
+import android.support.annotation.NonNull;
+
 import com.hippo.ehviewer.Settings;
 import com.hippo.network.UrlBuilder;
 
@@ -99,4 +101,15 @@ public class EhUrl {
     public static String getTagDefinitionUrl(String tag) {
         return "https://ehwiki.org/wiki/" + tag.replace(' ', '_');
     }
+
+    @NonNull
+    public static String getImageSearchUrl() {
+        switch (Settings.getGallerySite()) {
+            default:
+            case SITE_G:
+                return "http://ul.e-hentai.org/image_lookup.php";
+            case SITE_EX:
+                return "http://ul.exhentai.org/image_lookup.php";
+        }
+    }
 }