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/*    Copyright 2013 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.
 */

#include "mongo/db/auth/user.h"

#include <vector>

#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/auth/resource_pattern.h"
#include "mongo/db/auth/role_name.h"
#include "mongo/db/auth/user_name.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/sequence_util.h"

namespace mongo {

    User::User(const UserName& name) :
        _name(name),
        _refCount(0),
        _isValid(1) {}

    User::~User() {
        dassert(_refCount == 0);
    }

    const UserName& User::getName() const {
        return _name;
    }

    RoleNameIterator User::getRoles() const {
        return makeRoleNameIteratorForContainer(_roles);
    }

    RoleNameIterator User::getIndirectRoles() const {
         return makeRoleNameIteratorForContainer(_indirectRoles);
    }

    bool User::hasRole(const RoleName& roleName) const {
        return _roles.count(roleName);
    }

    const User::CredentialData& User::getCredentials() const {
        return _credentials;
    }

    bool User::isValid() const {
        return _isValid.loadRelaxed() == 1;
    }

    uint32_t User::getRefCount() const {
        return _refCount;
    }

    const ActionSet User::getActionsForResource(const ResourcePattern& resource) const {
        unordered_map<ResourcePattern, Privilege>::const_iterator it = _privileges.find(resource);
        if (it == _privileges.end()) {
            return ActionSet();
        }
        return it->second.getActions();
    }

    User* User::clone() const {
        std::unique_ptr<User> result(new User(_name));
        result->_privileges = _privileges;
        result->_roles = _roles;
        result->_credentials = _credentials;
        return result.release();
    }

    void User::setCredentials(const CredentialData& credentials) {
        _credentials = credentials;
    }

    void User::setRoles(RoleNameIterator roles) {
        _roles.clear();
        while (roles.more()) {
            _roles.insert(roles.next());
        }
    }

    void User::setIndirectRoles(RoleNameIterator indirectRoles) {
        _indirectRoles.clear();
        while (indirectRoles.more()) {
            _indirectRoles.push_back(indirectRoles.next());
        }
    }

    void User::setPrivileges(const PrivilegeVector& privileges) {
        _privileges.clear();
        for (size_t i = 0; i < privileges.size(); ++i) {
            const Privilege& privilege = privileges[i];
            _privileges[privilege.getResourcePattern()] = privilege;
        }
    }

    void User::addRole(const RoleName& roleName) {
        _roles.insert(roleName);
    }

    void User::addRoles(const std::vector<RoleName>& roles) {
        for (std::vector<RoleName>::const_iterator it = roles.begin(); it != roles.end(); ++it) {
            addRole(*it);
        }
    }

    void User::addPrivilege(const Privilege& privilegeToAdd) {
        ResourcePrivilegeMap::iterator it = _privileges.find(privilegeToAdd.getResourcePattern());
        if (it == _privileges.end()) {
            // No privilege exists yet for this resource
            _privileges.insert(std::make_pair(privilegeToAdd.getResourcePattern(), privilegeToAdd));
        } else {
            dassert(it->first == privilegeToAdd.getResourcePattern());
            it->second.addActions(privilegeToAdd.getActions());
        }
    }

    void User::addPrivileges(const PrivilegeVector& privileges) {
        for (PrivilegeVector::const_iterator it = privileges.begin();
                it != privileges.end(); ++it) {
            addPrivilege(*it);
        }
    }

    void User::invalidate() {
        _isValid.store(0);
    }

    void User::incrementRefCount() {
        ++_refCount;
    }

    void User::decrementRefCount() {
        dassert(_refCount > 0);
        --_refCount;
    }
} // namespace mongo