components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/beans/BasicUserInfo.java

@@ -35,6 +35,8 @@ public class BasicUserInfo {
     private String createdDate;
     @ApiModelProperty(name = "modifiedDate", value = "User modifiedDate date." )
     private String modifiedDate;
+    @ApiModelProperty(name = "isRemovable", value = "User's removable status." )
+    private boolean isRemovable;
 
     public String getUsername() {
         return username;
@@ -84,4 +86,11 @@ public class BasicUserInfo {
         this.modifiedDate = modifiedDate;
     }
 
+    public boolean isRemovable() {
+        return isRemovable;
+    }
+
+    public void setRemovable(boolean removable) {
+        isRemovable = removable;
+    }
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/UserManagementServiceImpl.java

@@ -252,7 +252,7 @@ public class UserManagementServiceImpl implements UserManagementService {
 
             BasicUserInfo user = this.getBasicUserInfo(username);
             return Response.status(Response.Status.OK).entity(user).build();
-        } catch (UserStoreException e) {
+        } catch (UserStoreException | DeviceManagementException e) {
             String msg = "Error occurred while retrieving information of the user '" + username + "'";
             log.error(msg, e);
             return Response.serverError().entity(
@@ -334,7 +334,7 @@ public class UserManagementServiceImpl implements UserManagementService {
 
             BasicUserInfo updatedUserInfo = this.getBasicUserInfo(username);
             return Response.ok().entity(updatedUserInfo).build();
-        } catch (UserStoreException e) {
+        } catch (UserStoreException | DeviceManagementException e) {
             String msg = "Error occurred while trying to update user '" + username + "'";
             log.error(msg, e);
             return Response.serverError().entity(
@@ -495,7 +495,7 @@ public class UserManagementServiceImpl implements UserManagementService {
             result.setCount(userList.size());
 
             return Response.status(Response.Status.OK).entity(result).build();
-        } catch (UserStoreException e) {
+        } catch (UserStoreException | DeviceManagementException e) {
             String msg = "Error occurred while retrieving the list of users.";
             log.error(msg, e);
             return Response.serverError().entity(
@@ -574,6 +574,7 @@ public class UserManagementServiceImpl implements UserManagementService {
                     basicUserInfo.setEmailAddress(getClaimValue(user, Constants.USER_CLAIM_EMAIL_ADDRESS));
                     basicUserInfo.setFirstname(getClaimValue(user, Constants.USER_CLAIM_FIRST_NAME));
                     basicUserInfo.setLastname(getClaimValue(user, Constants.USER_CLAIM_LAST_NAME));
+                    basicUserInfo.setRemovable(isUserRemovable(username));
                     filteredUserList.add(basicUserInfo);
                 }
             }
@@ -598,7 +599,7 @@ public class UserManagementServiceImpl implements UserManagementService {
             result.setCount(commonUsers != null ? commonUsers.size() : 0);
 
             return Response.status(Response.Status.OK).entity(result).build();
-        } catch (UserStoreException e) {
+        } catch (UserStoreException | DeviceManagementException e) {
             String msg = "Error occurred while retrieving the list of users.";
             log.error(msg, e);
             return Response.serverError().entity(
@@ -1249,7 +1250,7 @@ public class UserManagementServiceImpl implements UserManagementService {
         return initialUserPassword.toString();
     }
 
-    private BasicUserInfo getBasicUserInfo(String username) throws UserStoreException {
+    private BasicUserInfo getBasicUserInfo(String username) throws UserStoreException, DeviceManagementException {
         BasicUserInfo userInfo = new BasicUserInfo();
         userInfo.setUsername(username);
         userInfo.setEmailAddress(getClaimValue(username, Constants.USER_CLAIM_EMAIL_ADDRESS));
@@ -1257,9 +1258,21 @@ public class UserManagementServiceImpl implements UserManagementService {
         userInfo.setLastname(getClaimValue(username, Constants.USER_CLAIM_LAST_NAME));
         userInfo.setCreatedDate(getClaimValue(username, Constants.USER_CLAIM_CREATED));
         userInfo.setModifiedDate(getClaimValue(username, Constants.USER_CLAIM_MODIFIED));
+        userInfo.setRemovable(isUserRemovable(username));
         return userInfo;
     }
 
+    /**
+     * Check if the user can be removed or not
+     * @param username Username of the user
+     * @return True when user can be removed, otherwise false
+     * @throws DeviceManagementException Throws when error occurred while getting device count
+     */
+    private boolean isUserRemovable(String username) throws DeviceManagementException {
+        DeviceManagementProviderService deviceManagementProviderService = DeviceMgtAPIUtils.getDeviceManagementService();
+        return deviceManagementProviderService.getDeviceCount(username.contains("/") ? username.split("/")[1] : username) == 0;
+    }
+
     private String getClaimValue(String username, String claimUri) throws UserStoreException {
         UserStoreManager userStoreManager = DeviceMgtAPIUtils.getUserStoreManager();
         return userStoreManager.getUserClaimValue(username, claimUri, null);

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/test/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/UserManagementServiceImplTest.java

@@ -119,8 +119,9 @@ public class UserManagementServiceImplTest {
         PowerMockito.stub(PowerMockito.method(CarbonContext.class, "getThreadLocalCarbonContext"))
                 .toReturn(carbonContext);
         Mockito.when(carbonContext.getTenantId()).thenReturn(-1234);
-        Mockito.when(carbonContext.getUsername()).thenReturn("admin");
         Mockito.when(carbonContext.getTenantDomain()).thenReturn("carbon.super");
+        Mockito.when(carbonContext.getUsername()).thenReturn("admin");
+        Mockito.doReturn(0).when(deviceManagementProviderService).getDeviceCount(TEST_USERNAME);
         Mockito.doAnswer(new Answer() {
             private int count = 0;
 
@@ -156,9 +157,17 @@ public class UserManagementServiceImplTest {
 
     @Test(description = "This method tests the getUser method of UserManagementService", dependsOnMethods =
             "testAddUser")
-    public void testGetUser() throws UserStoreException {
+    public void testGetUser() throws UserStoreException, DeviceManagementException {
         PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getUserStoreManager"))
                 .toReturn(this.userStoreManager);
+        PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getDeviceManagementService"))
+                .toReturn(this.deviceManagementProviderService);
+        CarbonContext carbonContext = Mockito.mock(CarbonContext.class, Mockito.RETURNS_MOCKS);
+        PowerMockito.stub(PowerMockito.method(CarbonContext.class, "getThreadLocalCarbonContext"))
+                .toReturn(carbonContext);
+        Mockito.when(carbonContext.getTenantId()).thenReturn(-1234);
+        Mockito.when(carbonContext.getTenantDomain()).thenReturn("carbon.super");
+        Mockito.doReturn(0).when(deviceManagementProviderService).getDeviceCount(TEST_USERNAME);
         Response response = userManagementService.getUser(TEST_USERNAME, null, null);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode(), "User retrieval failed");
         BasicUserInfo userInfo = (BasicUserInfo) response.getEntity();
@@ -173,15 +182,18 @@ public class UserManagementServiceImplTest {
 
     @Test(description = "This method tests the updateUser method of UserManagementService", dependsOnMethods =
             {"testGetUser"})
-    public void testUpdateUser() throws UserStoreException {
+    public void testUpdateUser() throws UserStoreException, DeviceManagementException {
         PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getUserStoreManager"))
                 .toReturn(this.userStoreManager);
         CarbonContext carbonContext = Mockito.mock(CarbonContext.class, Mockito.RETURNS_MOCKS);
         PowerMockito.stub(PowerMockito.method(CarbonContext.class, "getThreadLocalCarbonContext"))
                 .toReturn(carbonContext);
+        PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getDeviceManagementService"))
+                .toReturn(this.deviceManagementProviderService);
         Mockito.when(carbonContext.getTenantId()).thenReturn(-1234);
-        Mockito.when(carbonContext.getUsername()).thenReturn("admin");
         Mockito.when(carbonContext.getTenantDomain()).thenReturn("carbon.super");
+        Mockito.when(carbonContext.getUsername()).thenReturn("admin");
+        Mockito.doReturn(0).when(deviceManagementProviderService).getDeviceCount(TEST_USERNAME);
         Response response = userManagementService.updateUser(TEST2_USERNAME, null, null);
         Assert.assertEquals(response.getStatus(), Response.Status.NOT_FOUND.getStatusCode(),
                 "Non-existing user was successfully updated");
@@ -250,10 +262,18 @@ public class UserManagementServiceImplTest {
 
     @Test(description = "This method tests the getUsers method of UserManagementService",
             dependsOnMethods = {"testGetUserNames"})
-    public void testGetUsers() {
+    public void testGetUsers() throws DeviceManagementException {
         PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getUserStoreManager"))
                 .toReturn(userStoreManager);
+        PowerMockito.stub(PowerMockito.method(DeviceMgtAPIUtils.class, "getDeviceManagementService"))
+                .toReturn(this.deviceManagementProviderService);
         Response response = userManagementService.getUsers(null, "00", 0, 10, null);
+        CarbonContext carbonContext = Mockito.mock(CarbonContext.class, Mockito.RETURNS_MOCKS);
+        PowerMockito.stub(PowerMockito.method(CarbonContext.class, "getThreadLocalCarbonContext"))
+                .toReturn(carbonContext);
+        Mockito.when(carbonContext.getTenantId()).thenReturn(-1234);
+        Mockito.when(carbonContext.getTenantDomain()).thenReturn("carbon.super");
+        Mockito.doReturn(0).when(deviceManagementProviderService).getDeviceCount(TEST_USERNAME);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode(), "GetUsers request failed");
     }