#63 feat: implement exists function

gemeinsamforschen/src/main/java/unipotsdam/gf/interfaces/ICommunication.java

@@ -77,6 +77,8 @@ public interface ICommunication {
      */
     String getChatRoomName(String roomId);
 
+    boolean exists(String roomId);
+
     /**
      * api: https://rocket.chat/docs/developer-guides/rest-api/authentication/login/
      *

gemeinsamforschen/src/main/java/unipotsdam/gf/modules/communication/service/CommunicationDummyService.java

@@ -45,6 +45,8 @@ public class CommunicationDummyService implements ICommunication {
     private UnirestService unirestService;
     private UserDAO userDAO;
 
+    // TODO: refactor error handling and add maybe some descriptions
+
     @Inject
     public CommunicationDummyService(UnirestService unirestService, UserDAO userDAO) {
         this.unirestService = unirestService;
@@ -314,6 +316,10 @@ public class CommunicationDummyService implements ICommunication {
         }
         user.setRocketChatPersonalAccessToken(responseBody.get("token").toString());
         return true;
+    }
 
+    @Override
+    public boolean exists(String roomId) {
+        return !getChatRoomName(roomId).isEmpty();
     }
 }

gemeinsamforschen/src/test/java/unipotsdam/gf/modules/communication/service/CommunicationDummyServiceTest.java

@@ -67,5 +67,20 @@ public class CommunicationDummyServiceTest {
 
         String actualChatRoomName = iCommunication.getChatRoomName(chatRoomId);
         assertEquals(expectedChatRoomName, actualChatRoomName);
+
+        String nonExistingChatRoomName = iCommunication.getChatRoomName("1");
+        assertTrue(nonExistingChatRoomName.isEmpty());
+    }
+
+    @Test
+    public void exists() {
+        String expectedChatRoomName = "ChatRoomName";
+        String chatRoomId = iCommunication.createEmptyChatRoom(expectedChatRoomName, false);
+        assertNotNull(chatRoomId);
+        assertFalse(chatRoomId.isEmpty());
+
+        assertTrue(iCommunication.exists(chatRoomId));
+        assertFalse(iCommunication.exists("1"));
+
     }
 }