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group_handler.go
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/
group_handler.go
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// Copyright 2021 Monoskope Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package scimserver
import (
"fmt"
"net/http"
"github.com/elimity-com/scim"
scim_errors "github.com/elimity-com/scim/errors"
"github.com/finleap-connect/monoskope/pkg/api/domain"
cmdData "github.com/finleap-connect/monoskope/pkg/api/domain/commanddata"
"github.com/finleap-connect/monoskope/pkg/api/eventsourcing"
cmd "github.com/finleap-connect/monoskope/pkg/domain/commands"
commandTypes "github.com/finleap-connect/monoskope/pkg/domain/constants/commands"
"github.com/finleap-connect/monoskope/pkg/domain/constants/roles"
"github.com/finleap-connect/monoskope/pkg/domain/constants/scopes"
"github.com/finleap-connect/monoskope/pkg/domain/constants/users"
"github.com/finleap-connect/monoskope/pkg/domain/errors"
es "github.com/finleap-connect/monoskope/pkg/eventsourcing"
"github.com/finleap-connect/monoskope/pkg/logger"
m8scim "github.com/finleap-connect/monoskope/pkg/scim"
"github.com/google/uuid"
)
type groupHandler struct {
cmdHandlerClient eventsourcing.CommandHandlerClient
userClient domain.UserClient
log logger.Logger
}
func NewGroupHandler(cmdHandlerClient eventsourcing.CommandHandlerClient, userClient domain.UserClient) scim.ResourceHandler {
return &groupHandler{
cmdHandlerClient, userClient, logger.WithName("scim-group-handler"),
}
}
// Create stores given attributes. Returns a resource with the attributes that are stored and a (new) unique identifier.
func (h *groupHandler) Create(r *http.Request, attributes scim.ResourceAttributes) (scim.Resource, error) {
logDebug(h.log, r)
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusNotImplemented,
}
}
// Get returns the resource corresponding with the given identifier.
func (h *groupHandler) Get(r *http.Request, id string) (scim.Resource, error) {
logDebug(h.log, r)
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusNotImplemented,
}
}
// GetAll returns a paginated list of resources.
// An empty list of resources will be represented as `null` in the JSON response if `nil` is assigned to the
// Page.Resources. Otherwise, is an empty slice is assigned, an empty list will be represented as `[]`.
func (h *groupHandler) GetAll(r *http.Request, params scim.ListRequestParams) (scim.Page, error) {
logDebug(h.log, r)
roleCount := len(roles.AvailableRoles)
// If count is less than one just return total count
if params.Count < 1 {
return scim.Page{
TotalResults: roleCount,
}, nil
}
resources := make([]scim.Resource, 0)
// Seek through the stream
i := 1
for {
if i > roleCount || i > (params.StartIndex+params.Count-1) {
break // We're done
}
// Read next
role := roles.AvailableRoles[i-1]
// Skip users which are not in the current page
if i >= params.StartIndex {
resources = append(resources, toScimGroup(role))
}
i++
}
return scim.Page{
TotalResults: int(roleCount),
Resources: resources,
}, nil
}
// Replace replaces ALL existing attributes of the resource with given identifier. Given attributes that are empty
// are to be deleted. Returns a resource with the attributes that are stored.
func (h *groupHandler) Replace(r *http.Request, id string, attributes scim.ResourceAttributes) (scim.Resource, error) {
logDebug(h.log, r)
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusNotImplemented,
}
}
// Delete removes the resource with corresponding ID.
func (h *groupHandler) Delete(r *http.Request, id string) error {
logDebug(h.log, r)
return scim_errors.ScimError{
Status: http.StatusNotImplemented,
}
}
// Patch update one or more attributes of a SCIM resource using a sequence of
// operations to "add", "remove", or "replace" values.
// If you return no Resource.Attributes, a 204 No Content status code will be returned.
// This case is only valid in the following scenarios:
// 1. the Add/Replace operation should return No Content only when the value already exists AND is the same.
// 2. the Remove operation should return No Content when the value to be remove is already absent.
// More information in Section 3.5.2 of RFC 7644: https://tools.ietf.org/html/rfc7644#section-3.5.2
func (h *groupHandler) Patch(r *http.Request, id string, operations []scim.PatchOperation) (scim.Resource, error) {
logDebug(h.log, r)
var err error
ctx, err := users.CreateUserContextGrpc(r.Context(), users.SCIMServerUser)
if err != nil {
h.log.Error(err, "Failed to create grpc context.")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusInternalServerError,
Detail: err.Error(),
}
}
roleId, err := uuid.Parse(id)
if err != nil {
h.log.Error(err, "Failed to parse roleId")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusBadRequest,
Detail: err.Error(),
}
}
role, ok := roles.AvailableRolesMap[roleId]
if !ok {
err := fmt.Errorf("roleId '%s' does not exist", roleId)
h.log.Error(err, "Failed to get role by id")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusInternalServerError,
Detail: err.Error(),
}
}
var members []string
for _, operation := range operations {
if operation.Path.String() != m8scim.GroupMembersAttribute {
continue
}
switch operation.Op {
case scim.PatchOperationAdd:
userIds := operation.Value.([]interface{})
for _, userIdValue := range userIds {
userIdAny := userIdValue.(map[string]interface{})[m8scim.GroupMemberValueAttribute]
userId := userIdAny.(string)
command, err := cmd.AddCommandData(
cmd.CreateCommand(uuid.Nil, commandTypes.CreateUserRoleBinding),
&cmdData.CreateUserRoleBindingCommandData{Role: role.String(), Scope: scopes.System.String(), UserId: userId},
)
if err != nil {
h.log.Error(err, "Failed to create command to patch group.")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusInternalServerError,
Detail: err.Error(),
}
}
_, err = h.cmdHandlerClient.Execute(ctx, command)
if err != nil {
if err := errors.TranslateFromGrpcError(err); err == errors.ErrUserRoleBindingAlreadyExists {
return scim.Resource{ID: roles.IdFromRole(role).String()}, nil
}
h.log.Error(err, "Failed to execute command to patch group.")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusInternalServerError,
Detail: err.Error(),
}
}
members = append(members, userId)
}
default:
err := fmt.Errorf("patch operator '%s' not supported", operation.Op)
h.log.Error(err, "Failed to patch group")
return scim.Resource{}, scim_errors.ScimError{
Status: http.StatusInternalServerError,
Detail: err.Error(),
}
}
}
return toScimGroup(role, members...), nil
}
// toScimGroup converts a projections.UserRoleBinding to it's scim.Resource representation
func toScimGroup(role es.Role, members ...string) scim.Resource {
var memberAttribute []map[string]string
if len(members) > 0 {
memberAttribute = make([]map[string]string, 0)
for _, member := range members {
memberAttribute = append(memberAttribute, map[string]string{
m8scim.GroupMemberValueAttribute: member,
})
}
}
return scim.Resource{
ID: roles.IdFromRole(role).String(),
Attributes: scim.ResourceAttributes{
m8scim.GroupNameAttribute: role,
m8scim.GroupMembersAttribute: memberAttribute,
},
}
}