/**
 * Copyright (C) 2013 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * 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 GNU Affero General 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 <string>

#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/resource_pattern.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/commands.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/repl_settings.h"

namespace mongo {
    class AppendOplogNoteCmd : public Command {
    public:
        AppendOplogNoteCmd() : Command( "appendOplogNote" ) {}
        virtual bool slaveOk() const { return false; }
        virtual bool adminOnly() const { return true; }
        virtual bool isWriteCommandForConfigServer() const { return false; }
        virtual void help( stringstream &help ) const {
            help << "Adds a no-op entry to the oplog";
        }
        virtual Status checkAuthForCommand(ClientBasic* client,
                                           const std::string& dbname,
                                           const BSONObj& cmdObj) {
            if (!client->getAuthorizationSession()->isAuthorizedForActionsOnResource(
                    ResourcePattern::forClusterResource(), ActionType::appendOplogNote)) {
                return Status(ErrorCodes::Unauthorized, "Unauthorized");
            }
            return Status::OK();
        }
        virtual bool run(const string& dbname,
                         BSONObj& cmdObj,
                         int,
                         string& errmsg,
                         BSONObjBuilder& result,
                         bool fromRepl) {
            if (!replSettings.master) {
                return appendCommandStatus(result, Status(
                        ErrorCodes::NoReplicationEnabled,
                        "Must have replication set up to run \"appendOplogNote\""));
            }
            BSONElement dataElement;
            Status status = bsonExtractTypedField(cmdObj, "data", Object, &dataElement);
            if (!status.isOK()) {
                return appendCommandStatus(result, status);
            }

            logOpComment(dataElement.Obj());
            return true;
        }

    } appendOplogNoteCmd;

} // namespace mongo
