Added GetCourseGroupsResponse(-Test)

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

restservice/src/main/java/com/plannaplan/responses/models/GetCourseGroupsResponse.java

@@ -0,0 +1,32 @@
+package com.plannaplan.responses.models;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.plannaplan.entities.Groups;
+import com.plannaplan.types.GroupType;
+
+public class GetCourseGroupsResponse {
+
+    private List<DefaultGroupResponse> lectures = new ArrayList<>();
+    private List<DefaultGroupResponse> classes = new ArrayList<>();
+
+    public GetCourseGroupsResponse(List<Groups> groups ){
+        groups.stream().forEach(group -> {
+            if (group.getType() == GroupType.CLASS) {
+                this.classes.add(new DefaultGroupResponse(group));
+            } else {
+                this.lectures.add(new DefaultGroupResponse(group));
+            }
+        });
+    }
+
+    public List<DefaultGroupResponse> getClasses() {
+        return this.classes;
+    }
+
+    public List<DefaultGroupResponse> getLectures() {
+        return this.lectures;
+    }
+
+}