text: /**
   *    Copyright (C) 2020-present MongoDB, Inc.
   *
   *    This program is free software: you can redistribute it and/or modify
   *    it under the terms of the Server Side Public License, version 1,
   *    as published by MongoDB, Inc.
   *
   *    This program is distributed in the hope that it will be useful,
   *    but WITHOUT ANY WARRANTY; without even the implied warranty of
   *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *    Server Side Public License for more details.
   *
   *    You should have received a copy of the Server Side Public License
   *    along with this program. If not, see
   *    <http://www.mongodb.com/licensing/server-side-public-license>.
   *
   *    As a special exception, the copyright holders give permission to link the
   *    code of portions of this program with the OpenSSL library under certain
   *    conditions as described in each individual source file and distribute
   *    linked combinations including the program with the OpenSSL library. You
   *    must comply with the Server Side Public License in all respects for
   *    all of the code used other than as permitted herein. If you modify file(s)
   *    with this exception, you may extend this exception to your version of the
   *    file(s), but you are not obligated to do so. If you do not wish to do so,
   *    delete this exception statement from your version. If you delete this
   *    exception statement from all source files in the program, then also delete
   *    it in the license file.
   */
  
  
  #include "mongo/db/auth/authorization_session.h"
  #include "mongo/db/catalog/rename_collection.h"
  #include "mongo/db/commands.h"
  #include "mongo/db/s/rename_collection_coordinator.h"
  #include "mongo/db/s/sharding_ddl_coordinator_service.h"
  #include "mongo/db/s/sharding_ddl_util.h"
  #include "mongo/db/s/sharding_state.h"
  #include "mongo/logv2/log.h"
  #include "mongo/s/cluster_commands_helpers.h"
  #include "mongo/s/request_types/sharded_ddl_commands_gen.h"
  
  #define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
  
  
  namespace mongo {
  namespace {
  
  class ShardsvrRenameCollectionCommand final : public TypedCommand<ShardsvrRenameCollectionCommand> {
  public:
      using Request = ShardsvrRenameCollection;
      using Response = RenameCollectionResponse;
  
      bool skipApiVersionCheck() const override {
          // Internal command (server to server).
          return true;
      }
  
      std::string help() const override {
          return "Internal command. Do not call directly. Renames a collection.";
      }
  
      bool adminOnly() const override {
          return false;
      }
  
      AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
          return AllowedOnSecondary::kNever;
      }
  
      class Invocation final : public InvocationBase {
      public:
          using InvocationBase::InvocationBase;
  
          Response typedRun(OperationContext* opCtx) {
              const auto& req = request();
              const auto& fromNss = ns();
              const auto& toNss = req.getTo();
  
              uassert(ErrorCodes::IllegalOperation,
                      "Can't rename a collection to itself",
                      fromNss != toNss);
  
              auto const shardingState = ShardingState::get(opCtx);
              uassertStatusOK(shardingState->canAcceptShardedCommands());
  
              opCtx->setAlwaysInterruptAtStepDownOrUp();
  
              CommandHelpers::uassertCommandRunWithMajority(Request::kCommandName,
                                                            opCtx->getWriteConcern());
  
              if (fromNss.db() != toNss.db()) {
                  sharding_ddl_util::checkDbPrimariesOnTheSameShard(opCtx, fromNss, toNss);
              }
  
              validateNamespacesForRenameCollection(opCtx, fromNss, toNss);
  
              auto coordinatorDoc = RenameCollectionCoordinatorDocument();
              coordinatorDoc.setRenameCollectionRequest(req.getRenameCollectionRequest());
              coordinatorDoc.setShardingDDLCoordinatorMetadata(
                  {{fromNss, DDLCoordinatorTypeEnum::kRenameCollection}});
              auto service = ShardingDDLCoordinatorService::getService(opCtx);
              auto renameCollectionCoordinator = checked_pointer_cast<RenameCollectionCoordinator>(
                  service->getOrCreateInstance(opCtx, coordinatorDoc.toBSON()));
              return renameCollectionCoordinator->getResponse(opCtx);
          }
  
      private:
          NamespaceString ns() const override {
              return request().getNamespace();
          }
  
          bool supportsWriteConcern() const override {
              return true;
          }
  
          void doCheckAuthorization(OperationContext* opCtx) const override {
              uassert(ErrorCodes::Unauthorized,
                      "Unauthorized",
                      AuthorizationSession::get(opCtx->getClient())
                          ->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
                                                             ActionType::internal));
          }
      };
  
  } shardsvrRenameCollectionCommand;
  
  }  // namespace
  }  // namespace mongo
  