dev add referral

src/main/java/ru/soune/nocopy/service/referral/ReferralLevelProviderImpl.java

@@ -0,0 +1,31 @@
+package ru.soune.nocopy.service.referral;
+
+import org.springframework.stereotype.Component;
+import ru.soune.ReferralLevel;
+import ru.soune.ReferralLevelProvider;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+public class ReferralLevelProviderImpl implements ReferralLevelProvider {
+
+    @Override
+    public List<ReferralLevel> getAvailableReferralLevels() {
+        // TODO
+
+        return new ArrayList<ReferralLevel>();
+    }
+
+    @Override
+    public String getInitialReferralLevelId() {
+        return "bronze";
+    }
+
+    @Override
+    public ReferralLevel getReferralLevelById(String levelId) {
+        // TODO
+
+        return null;
+    }
+}