Add: hierarchical group count API

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

@@ -355,6 +355,52 @@ public interface GroupManagementService {
             @QueryParam("limit")
                     int limit);
 
+    @Path("/hierarchy/count")
+    @GET
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = HTTPConstants.HEADER_GET,
+            value = "Getting the Number of Hirarchical Device Groups",
+            notes = "Get the number of hierarchical device groups in the server that the current signed in user can access.",
+            tags = "Device Group Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:groups:count")
+                    })
+            },
+            nickname = "getGroupCountNonAdmin"
+
+    )
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "OK. \n Successfully fetched the hierarchical device group count.",
+                    response = DeviceGroupList.class,
+                    responseHeaders = {
+                            @ResponseHeader(
+                                    name = "Content-Type",
+                                    description = "The content type of the body"),
+                            @ResponseHeader(
+                                    name = "ETag",
+                                    description = "Entity Tag of the response resource.\n" +
+                                            "Used by caches, or in conditional requests."),
+                            @ResponseHeader(
+                                    name = "Last-Modified",
+                                    description = "Date and time the resource has been modified the last time.\n" +
+                                            "Used by caches, or in conditional requests."),
+                    }),
+            @ApiResponse(
+                    code = 304,
+                    message = "Not Modified. \n Empty body because the client has already the latest version of " +
+                            "the requested resource."),
+            @ApiResponse(
+                    code = 406,
+                    message = "Not Acceptable.\n The requested media type is not supported."),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the group count.",
+                    response = ErrorResponse.class)
+    })
+    Response getHierarchicalGroupCount();
+
     @Path("/count")
     @GET
     @ApiOperation(

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/api/admin/GroupManagementAdminService.java

@@ -256,6 +256,58 @@ public interface GroupManagementAdminService {
             @QueryParam("limit")
                     int limit);
 
+    @Path("/hierarchy/count")
+    @GET
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = HTTPConstants.HEADER_GET,
+            value = "Get the count of all hierarchical groups belongs to current admin user.",
+            notes = "Returns count of all permitted hierarchical groups enrolled with the system.",
+            tags = "Device Group Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:admin-groups:count")
+                    })
+            }
+    )
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "OK. \n Successfully fetched the hierarchical device group count.",
+                    response = Integer.class,
+                    responseHeaders = {
+                            @ResponseHeader(
+                                    name = "Content-Type",
+                                    description = "The content type of the body"),
+                            @ResponseHeader(
+                                    name = "ETag",
+                                    description = "Entity Tag of the response resource.\n" +
+                                            "Used by caches, or in conditional requests."),
+                            @ResponseHeader(
+                                    name = "Last-Modified",
+                                    description = "Date and time the resource has been modified the last time.\n" +
+                                            "Used by caches, or in conditional requests."),
+                    }),
+            @ApiResponse(
+                    code = 304,
+                    message = "Not Modified. \n Empty body because the client has already the latest version of " +
+                            "the requested resource."),
+            @ApiResponse(
+                    code = 404,
+                    message = "No groups found.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 406,
+                    message = "Not Acceptable.\n The requested media type is not supported."),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the group count.",
+                    response = ErrorResponse.class)
+    })
+    Response getHierarchicalGroupCount(@ApiParam(
+            name = "status",
+            value = "status of hierarchical groups of which count should be retrieved")
+                           @QueryParam("status")
+                           String status);
+
     @Path("/count")
     @GET
     @ApiOperation(

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/GroupManagementServiceImpl.java

@@ -140,6 +140,19 @@ public class GroupManagementServiceImpl implements GroupManagementService {
         }
     }
 
+    @Override
+    public Response getHierarchicalGroupCount() {
+        try {
+            String currentUser = PrivilegedCarbonContext.getThreadLocalCarbonContext().getUsername();
+            int count = DeviceMgtAPIUtils.getGroupManagementProviderService().getHierarchicalGroupCount(currentUser, null);
+            return Response.status(Response.Status.OK).entity(count).build();
+        } catch (GroupManagementException e) {
+            String msg = "Error occurred while retrieving hierarchical group count.";
+            log.error(msg, e);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+        }
+    }
+
     @Override
     public Response getGroupCount() {
         try {

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/admin/GroupManagementAdminServiceImpl.java

@@ -133,6 +133,23 @@ public class GroupManagementAdminServiceImpl implements GroupManagementAdminServ
         }
     }
 
+    @Override
+    public Response getHierarchicalGroupCount(String status) {
+        try {
+            int count;
+            if (status == null || status.isEmpty()) {
+                count = DeviceMgtAPIUtils.getGroupManagementProviderService().getHierarchicalGroupCount();
+            } else {
+                count = DeviceMgtAPIUtils.getGroupManagementProviderService().getGroupCountByStatus(status);
+            }
+            return Response.status(Response.Status.OK).entity(count).build();
+        } catch (GroupManagementException e) {
+            String msg = "ErrorResponse occurred while retrieving hierarchical group count.";
+            log.error(msg, e);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+        }
+    }
+
     @Override
     public Response getGroupCount(String status) {
         try {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/GroupManagementProviderService.java

@@ -189,6 +189,14 @@ public interface GroupManagementProviderService {
     PaginationResult getGroupsWithHierarchy(String username, GroupPaginationRequest request,
             boolean requireGroupProps) throws GroupManagementException;
 
+    /**
+     * Get all hierarchical device groups count in tenant
+     *
+     * @return hierarchical group count
+     * @throws GroupManagementException
+     */
+    int getHierarchicalGroupCount() throws GroupManagementException;
+
     /**
      * Get all device group count in tenant
      *
@@ -215,6 +223,16 @@ public interface GroupManagementProviderService {
      */
     int getGroupCount(String username, String parentPath) throws GroupManagementException;
 
+    /**
+     * Get hierarchical device groups count of user
+     *
+     * @param username of the user
+     * @param parentPath of the group
+     * @return hierarchical group count
+     * @throws GroupManagementException
+     */
+    int getHierarchicalGroupCount(String username, String parentPath) throws GroupManagementException;
+
     /**
      * Manage device group sharing with user with list of roles.
      *

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/GroupManagementProviderServiceImpl.java

@@ -854,6 +854,28 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         return groupResult;
     }
 
+    @Override
+    public int getHierarchicalGroupCount() throws GroupManagementException {
+        if (log.isDebugEnabled()) {
+            log.debug("Get groups count");
+        }
+        try {
+            int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+            GroupManagementDAOFactory.openConnection();
+            return groupDAO.getGroupCount(tenantId, null);
+        } catch (GroupManagementDAOException | SQLException e) {
+            String msg = "Error occurred while retrieving all groups in tenant";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } catch (Exception e) {
+            String msg = "Error occurred";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } finally {
+            GroupManagementDAOFactory.closeConnection();
+        }
+    }
+
     @Override
     public int getGroupCount() throws GroupManagementException {
         if (log.isDebugEnabled()) {
@@ -962,6 +984,53 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         }
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public int getHierarchicalGroupCount(String username, String parentPath) throws GroupManagementException {
+        if (username == null || username.isEmpty()) {
+            String msg = "Received empty user name for getHierarchicalGroupCount";
+            log.error(msg);
+            throw new GroupManagementException(msg);
+        }
+        if (log.isDebugEnabled()) {
+            log.debug("Get groups count of '" + username + "'");
+        }
+        UserStoreManager userStoreManager;
+        int count;
+        try {
+            int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+            userStoreManager = DeviceManagementDataHolder.getInstance().getRealmService().getTenantUserRealm(tenantId)
+                    .getUserStoreManager();
+            if (isAdminUser(username, userStoreManager)) {
+                GroupManagementDAOFactory.openConnection();
+                count = groupDAO.getGroupCount(tenantId, null);
+                return count;
+            }else {
+                String[] roleList = userStoreManager.getRoleListOfUser(username);
+                GroupManagementDAOFactory.openConnection();
+                count = groupDAO.getOwnGroupsCount(username, tenantId, parentPath);
+                count += groupDAO.getGroupsCount(roleList, tenantId, parentPath);
+                return count;
+            }
+        } catch (UserStoreException e) {
+            String msg = "Error occurred while retrieving role list of user '" + username + "'";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } catch (SQLException e) {
+            String msg = "Error occurred while opening db connection to get group count.";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } catch (GroupManagementDAOException e) {
+            String msg = "Error occurred while retrieving group count of user '" + username + "'";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } finally {
+            GroupManagementDAOFactory.closeConnection();
+        }
+    }
+
     /**
      * {@inheritDoc}
      */