1 files changed, 34 insertions, 0 deletions
diff --git a/main/src/cgeo/geocaching/utils/CheckerUtils.java b/main/src/cgeo/geocaching/utils/CheckerUtils.java
new file mode 100644
index 0000000..956ebbf
--- /dev/null
+++ b/main/src/cgeo/geocaching/utils/CheckerUtils.java
@@ -0,0 +1,34 @@
+package cgeo.geocaching.utils;
+
+import cgeo.geocaching.Geocache;
+
+import org.apache.commons.lang3.StringUtils;
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
+
+import android.util.Patterns;
+
+import java.util.regex.Matcher;
+
+public final class CheckerUtils {
+    private static final String[] CHECKERS = new String[] { "geocheck.org", "geochecker.com", "certitudes.org" };
+
+    private CheckerUtils() {
+        // utility class
+    }
+
+    @Nullable
+    public static String getCheckerUrl(@NonNull final Geocache cache) {
+        final String description = cache.getDescription();
+        final Matcher matcher = Patterns.WEB_URL.matcher(description);
+        while (matcher.find()) {
+            final String url = matcher.group();
+            for (final String checker : CHECKERS) {
+                if (StringUtils.containsIgnoreCase(url, checker)) {
+                    return url;
+                }
+            }
+        }
+        return null;
+    }
+}