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/*
*    Copyright (C) 2012 10gen 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.
*/

#pragma once

#include <boost/function.hpp>
#include <string>
#include <map>
#include <vector>

#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/db/auth/authz_manager_external_state.h"
#include "mongo/db/auth/role_graph.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/namespace_string.h"

namespace mongo {

    /**
     * Mock of the AuthzManagerExternalState class used only for testing.
     */
    class AuthzManagerExternalStateMock : public AuthzManagerExternalState {
        MONGO_DISALLOW_COPYING(AuthzManagerExternalStateMock);

    public:

        AuthzManagerExternalStateMock() {};

        virtual Status initialize();
        virtual Status getUserDescription(const UserName& userName, BSONObj* result);
        virtual Status getRoleDescription(const RoleName& roleName, BSONObj* result);


        virtual Status insertPrivilegeDocument(const std::string& dbname,
                                               const BSONObj& userObj,
                                               const BSONObj& writeConcern);

        virtual Status updatePrivilegeDocument(const UserName& user,
                                               const BSONObj& updateObj,
                                               const BSONObj& writeConcern);

        // no-op for the mock
        virtual Status removePrivilegeDocuments(const BSONObj& query,
                                                const BSONObj& writeConcern,
                                                int* numRemoved);

        void clearPrivilegeDocuments();

        virtual Status getAllDatabaseNames(std::vector<std::string>* dbnames);

        virtual Status getAllV1PrivilegeDocsForDB(const std::string& dbname,
                                                  std::vector<BSONObj>* privDocs);

        virtual Status _findUser(const std::string& usersNamespace,
                                 const BSONObj& query,
                                 BSONObj* result);

        virtual Status findOne(const NamespaceString& collectionName,
                               const BSONObj& query,
                               BSONObj* result);

        virtual Status query(const NamespaceString& collectionName,
                             const BSONObj& query,
                             const BSONObj& projection, // Currently unused in mock
                             const boost::function<void(const BSONObj&)>& resultProcessor);

        // This implementation does not understand uniqueness constraints.
        virtual Status insert(const NamespaceString& collectionName,
                              const BSONObj& document,
                              const BSONObj& writeConcern);

        // This implementation does not understand uniqueness constraints, ignores writeConcern,
        // and only correctly handles some upsert behaviors.
        virtual Status updateOne(const NamespaceString& collectionName,
                                 const BSONObj& query,
                                 const BSONObj& updatePattern,
                                 bool upsert,
                                 const BSONObj& writeConcern);
        virtual Status update(const NamespaceString& collectionName,
                              const BSONObj& query,
                              const BSONObj& updatePattern,
                              bool upsert,
                              bool multi,
                              const BSONObj& writeConcern,
                              int* numUpdated);
        virtual Status remove(const NamespaceString& collectionName,
                              const BSONObj& query,
                              const BSONObj& writeConcern,
                              int* numRemoved);
        virtual Status createIndex(const NamespaceString& collectionName,
                                   const BSONObj& pattern,
                                   bool unique,
                                   const BSONObj& writeConcern);
        virtual Status dropCollection(const NamespaceString& collectionName,
                                      const BSONObj& writeConcern);
        virtual Status renameCollection(const NamespaceString& oldName,
                                        const NamespaceString& newName,
                                        const BSONObj& writeConcern);
        virtual Status copyCollection(const NamespaceString& fromName,
                                      const NamespaceString& toName,
                                      const BSONObj& writeConcern);
        virtual bool tryAcquireAuthzUpdateLock(const StringData& why);
        virtual void releaseAuthzUpdateLock();

        std::vector<BSONObj> getCollectionContents(const NamespaceString& collectionName);

    private:
        typedef std::vector<BSONObj> BSONObjCollection;
        typedef std::map<NamespaceString, BSONObjCollection> NamespaceDocumentMap;

        Status _findOneIter(const NamespaceString& collectionName,
                            const BSONObj& query,
                            BSONObjCollection::iterator* result);

        Status _queryVector(const NamespaceString& collectionName,
                            const BSONObj& query,
                            std::vector<BSONObjCollection::iterator>* result);


        NamespaceDocumentMap _documents; // Mock database.
        RoleGraph _roleGraph;
    };

} // namespace mongo