Implements remove user API (#42)

* Implementation of RemoveUser from madmin

* Added removeUser structure.

* Added removeUserResponse actions

* Added delete API to swagger

* Added tests to removeUser functions

* Removed extra space at EOF

* Changed context to be a parameter in admin_users functions

Co-authored-by: Benjamin Perez <benjamin@bexsoft.net>

restapi/admin_users.go

@@ -46,14 +46,21 @@ func registerUsersHandlers(api *operations.McsAPI) {
 		}
 		return admin_api.NewAddUserCreated().WithPayload(userResponse)
 	})
+	// Remove User
+	api.AdminAPIRemoveUserHandler = admin_api.RemoveUserHandlerFunc(func(params admin_api.RemoveUserParams, principal *models.Principal) middleware.Responder {
+		err := getRemoveUserResponse(params)
+		if err != nil {
+			return admin_api.NewRemoveUserDefault(500).WithPayload(&models.Error{Code: 500, Message: swag.String(err.Error())})
+		}
+		return admin_api.NewRemoveUserNoContent()
+	})
 }
 
-func listUsers(client MinioAdmin) ([]*models.User, error) {
+func listUsers(ctx context.Context, client MinioAdmin) ([]*models.User, error) {
 
 	// Get list of all users in the MinIO
 	// This call requires explicit authentication, no anonymous requests are
 	// allowed for listing users.
-	ctx := context.Background()
 	userMap, err := client.listUsers(ctx)
 	if err != nil {
 		return []*models.User{}, err
@@ -75,6 +82,7 @@ func listUsers(client MinioAdmin) ([]*models.User, error) {
 
 // getListUsersResponse performs listUsers() and serializes it to the handler's output
 func getListUsersResponse() (*models.ListUsersResponse, error) {
+	ctx := context.Background()
 	mAdmin, err := newMAdminClient()
 	if err != nil {
 		log.Println("error creating Madmin Client:", err)
@@ -84,7 +92,7 @@ func getListUsersResponse() (*models.ListUsersResponse, error) {
 	// defining the client to be used
 	adminClient := adminClient{client: mAdmin}
 
-	users, err := listUsers(adminClient)
+	users, err := listUsers(ctx, adminClient)
 	if err != nil {
 		log.Println("error listing users:", err)
 		return nil, err
@@ -97,9 +105,8 @@ func getListUsersResponse() (*models.ListUsersResponse, error) {
 }
 
 // addUser invokes adding a users on `MinioAdmin` and builds the response `models.User`
-func addUser(client MinioAdmin, accessKey, secretKey *string) (*models.User, error) {
+func addUser(ctx context.Context, client MinioAdmin, accessKey, secretKey *string) (*models.User, error) {
 	// Calls into MinIO to add a new user if there's an error return it
-	ctx := context.Background()
 	err := client.addUser(ctx, *accessKey, *secretKey)
 	if err != nil {
 		return nil, err
@@ -113,6 +120,7 @@ func addUser(client MinioAdmin, accessKey, secretKey *string) (*models.User, err
 }
 
 func getUserAddResponse(params admin_api.AddUserParams) (*models.User, error) {
+	ctx := context.Background()
 	mAdmin, err := newMAdminClient()
 	if err != nil {
 		log.Println("error creating Madmin Client:", err)
@@ -122,10 +130,40 @@ func getUserAddResponse(params admin_api.AddUserParams) (*models.User, error) {
 	// defining the client to be used
 	adminClient := adminClient{client: mAdmin}
 
-	user, err := addUser(adminClient, params.Body.AccessKey, params.Body.SecretKey)
+	user, err := addUser(ctx, adminClient, params.Body.AccessKey, params.Body.SecretKey)
 	if err != nil {
 		log.Println("error adding user:", err)
 		return nil, err
 	}
 	return user, nil
 }
+
+//removeUser invokes removing an user on `MinioAdmin`, then we return the response from API
+func removeUser(ctx context.Context, client MinioAdmin, accessKey string) error {
+	if err := client.removeUser(ctx, accessKey); err != nil {
+		return err
+	}
+	return nil
+}
+
+func getRemoveUserResponse(params admin_api.RemoveUserParams) error {
+	ctx := context.Background()
+
+	mAdmin, err := newMAdminClient()
+	if err != nil {
+		log.Println("error creating Madmin Client:", err)
+		return err
+	}
+
+	// create a minioClient interface implementation
+	// defining the client to be used
+	adminClient := adminClient{client: mAdmin}
+
+	if err := removeUser(ctx, adminClient, params.Name); err != nil {
+		log.Println("error removing user:", err)
+		return err
+	}
+
+	log.Println("User removed successfully:", params.Name)
+	return nil
+}

restapi/admin_users_test.go

@@ -31,6 +31,7 @@ import (
 // assigning mock at runtime instead of compile time
 var minioListUsersMock func() (map[string]madmin.UserInfo, error)
 var minioAddUserMock func(accessKey, secreyKey string) error
+var minioRemoveUserMock func(accessKey string) error
 
 // mock function of listUsers()
 func (ac adminClientMock) listUsers(ctx context.Context) (map[string]madmin.UserInfo, error) {
@@ -42,9 +43,15 @@ func (ac adminClientMock) addUser(ctx context.Context, accessKey, secretKey stri
 	return minioAddUserMock(accessKey, secretKey)
 }
 
+// mock function of removeUser()
+func (ac adminClientMock) removeUser(ctx context.Context, accessKey string) error {
+	return minioRemoveUserMock(accessKey)
+}
+
 func TestListUsers(t *testing.T) {
 	assert := asrt.New(t)
 	adminClient := adminClientMock{}
+	ctx := context.Background()
 	// Test-1 : listUsers() Get response from minio client with two users and return the same number on listUsers()
 	// mock minIO client
 	mockUserMap := map[string]madmin.UserInfo{
@@ -69,7 +76,7 @@ func TestListUsers(t *testing.T) {
 	// get list users response this response should have Name, CreationDate, Size and Access
 	// as part of of each user
 	function := "listUsers()"
-	userMap, err := listUsers(adminClient)
+	userMap, err := listUsers(ctx, adminClient)
 	if err != nil {
 		t.Errorf("Failed on %s:, error occurred: %s", function, err.Error())
 	}
@@ -87,7 +94,7 @@ func TestListUsers(t *testing.T) {
 	minioListUsersMock = func() (map[string]madmin.UserInfo, error) {
 		return nil, errors.New("error")
 	}
-	_, err = listUsers(adminClient)
+	_, err = listUsers(ctx, adminClient)
 	if assert.Error(err) {
 		assert.Equal("error", err.Error())
 	}
@@ -96,7 +103,7 @@ func TestListUsers(t *testing.T) {
 func TestAddUser(t *testing.T) {
 	assert := asrt.New(t)
 	adminClient := adminClientMock{}
-
+	ctx := context.Background()
 	// Test-1: valid case of adding a user with a proper access key
 	accessKey := "ABCDEFGHI"
 	secretKey := "ABCDEFGHIABCDEFGHI"
@@ -107,7 +114,7 @@ func TestAddUser(t *testing.T) {
 	}
 	// adds a valid user to MinIO
 	function := "addUser()"
-	user, err := addUser(adminClient, &accessKey, &secretKey)
+	user, err := addUser(ctx, adminClient, &accessKey, &secretKey)
 	if err != nil {
 		t.Errorf("Failed on %s:, error occurred: %s", function, err.Error())
 	}
@@ -124,7 +131,7 @@ func TestAddUser(t *testing.T) {
 		return errors.New("error")
 	}
 
-	user, err = addUser(adminClient, &accessKey, &secretKey)
+	user, err = addUser(ctx, adminClient, &accessKey, &secretKey)
 
 	// no error should have been returned
 	assert.Nil(user, "User is not null")
@@ -134,3 +141,31 @@ func TestAddUser(t *testing.T) {
 		assert.Equal("error", err.Error())
 	}
 }
+
+func TestRemoveUser(t *testing.T) {
+	assert := asrt.New(t)
+	// mock minIO client
+	adminClient := adminClientMock{}
+	ctx := context.Background()
+	function := "removeUser()"
+
+	// Test-1: removeUser() delete a user
+	// mock function response from removeUser(accessKey)
+	minioRemoveUserMock = func(accessKey string) error {
+		return nil
+	}
+
+	if err := removeUser(ctx, adminClient, "ABCDEFGHI"); err != nil {
+		t.Errorf("Failed on %s:, error occurred: %s", function, err.Error())
+	}
+
+	// Test-2: removeUser() make sure errors are handled correctly when error on DeleteUser()
+	// mock function response from removeUser(accessKey)
+	minioRemoveUserMock = func(accessKey string) error {
+		return errors.New("error")
+	}
+
+	if err := removeUser(ctx, adminClient, "notexistentuser"); assert.Error(err) {
+		assert.Equal("error", err.Error())
+	}
+}

restapi/client-admin.go

@@ -57,6 +57,7 @@ var s3AdminNew = mcCmd.NewAdminFactory()
 type MinioAdmin interface {
 	listUsers(ctx context.Context) (map[string]madmin.UserInfo, error)
 	addUser(ctx context.Context, acessKey, SecretKey string) error
+	removeUser(ctx context.Context, accessKey string) error
 	listGroups(ctx context.Context) ([]string, error)
 	updateGroupMembers(ctx context.Context, greq madmin.GroupAddRemove) error
 	getGroupDescription(ctx context.Context, group string) (*madmin.GroupDesc, error)
@@ -93,6 +94,11 @@ func (ac adminClient) addUser(ctx context.Context, acessKey, secretKey string) e
 	return ac.client.AddUser(ctx, acessKey, secretKey)
 }
 
+// implements madmin.RemoveUser()
+func (ac adminClient) removeUser(ctx context.Context, accessKey string) error {
+	return ac.client.RemoveUser(ctx, accessKey)
+}
+
 // implements madmin.ListGroups()
 func (ac adminClient) listGroups(ctx context.Context) ([]string, error) {
 	return ac.client.ListGroups(ctx)