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/**
 *    Copyright (C) 2008 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/platform/basic.h"

#include "mongo/db/ops/delete.h"

#include "mongo/db/catalog/database.h"
#include "mongo/db/exec/delete.h"
#include "mongo/db/ops/delete_request.h"
#include "mongo/db/ops/parsed_delete.h"
#include "mongo/db/query/get_executor.h"
#include "mongo/db/repl/repl_client_info.h"

namespace mongo {

/* ns:      namespace, e.g. <database>.<collection>
   pattern: the "where" clause / criteria
   justOne: stop after 1 match
   god:     allow access to system namespaces, and don't yield
*/
long long deleteObjects(OperationContext* opCtx,
                        Collection* collection,
                        StringData ns,
                        BSONObj pattern,
                        PlanExecutor::YieldPolicy policy,
                        bool justOne,
                        bool god,
                        bool fromMigrate) {
    NamespaceString nsString(ns);
    DeleteRequest request(nsString);
    request.setQuery(pattern);
    request.setMulti(!justOne);
    request.setGod(god);
    request.setFromMigrate(fromMigrate);
    request.setYieldPolicy(policy);

    ParsedDelete parsedDelete(opCtx, &request);
    uassertStatusOK(parsedDelete.parseRequest());

    auto client = opCtx->getClient();
    auto lastOpAtOperationStart = repl::ReplClientInfo::forClient(client).getLastOp();

    std::unique_ptr<PlanExecutor> exec = uassertStatusOK(
        getExecutorDelete(opCtx, &CurOp::get(opCtx)->debug(), collection, &parsedDelete));

    uassertStatusOK(exec->executePlan());

    // No-ops need to reset lastOp in the client, for write concern.
    if (repl::ReplClientInfo::forClient(client).getLastOp() == lastOpAtOperationStart) {
        repl::ReplClientInfo::forClient(client).setLastOpToSystemLastOpTime(opCtx);
    }

    return DeleteStage::getNumDeleted(*exec);
}

}  // namespace mongo