path: root/src/mongo/scripting/mozjs/mongo.cpp

/**
 *    Copyright (C) 2018-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/scripting/mozjs/mongo.h"

#include <js/Object.h>
#include <memory>

#include "mongo/bson/simple_bsonelement_comparator.h"
#include "mongo/client/client_api_version_parameters_gen.h"
#include "mongo/client/client_deprecated.h"
#include "mongo/client/dbclient_base.h"
#include "mongo/client/dbclient_rs.h"
#include "mongo/client/global_conn_pool.h"
#include "mongo/client/mongo_uri.h"
#include "mongo/client/replica_set_monitor.h"
#include "mongo/db/logical_session_id.h"
#include "mongo/db/logical_session_id_helpers.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/scripting/dbdirectclient_factory.h"
#include "mongo/scripting/mozjs/cursor.h"
#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/scripting/mozjs/objectwrapper.h"
#include "mongo/scripting/mozjs/session.h"
#include "mongo/scripting/mozjs/valuereader.h"
#include "mongo/scripting/mozjs/valuewriter.h"
#include "mongo/scripting/mozjs/wrapconstrainedmethod.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/quick_exit.h"

namespace mongo {
namespace mozjs {

const JSFunctionSpec MongoBase::methods[] = {
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(auth, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(close, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(compact, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(cursorHandleFromId, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(find, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(generateDataKey, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(getDataKeyCollection, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(encrypt, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(decrypt, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(isReplicaSetConnection, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(_markNodeAsFailed, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(logout, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(getMinWireVersion, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(getMaxWireVersion, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(isReplicaSetMember, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(isMongos, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(isTLS, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(getApiParameters, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(_runCommandImpl, MongoExternalInfo),
    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(_startSession, MongoExternalInfo),
    JS_FS_END,
};

const char* const MongoBase::className = "Mongo";

EncryptedDBClientCallback* encryptedDBClientCallback = nullptr;

const JSFunctionSpec MongoExternalInfo::freeFunctions[4] = {
    MONGO_ATTACH_JS_FUNCTION(_forgetReplSet),
    MONGO_ATTACH_JS_FUNCTION(load),
    MONGO_ATTACH_JS_FUNCTION(quit),
    JS_FS_END,
};

namespace {

const std::shared_ptr<DBClientBase>& getConnectionRef(JS::CallArgs& args) {
    auto ret =
        static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(args.thisv().toObjectOrNull()));
    uassert(
        ErrorCodes::BadValue, "Trying to get connection for closed Mongo object", *ret != nullptr);
    return *ret;
}

DBClientBase* getConnection(JS::CallArgs& args) {
    return getConnectionRef(args).get();
}

bool isUnacknowledged(const BSONObj& cmdObj) {
    auto wc = cmdObj["writeConcern"];
    return wc && wc["w"].isNumber() && wc["w"].safeNumberLong() == 0;
}

void returnOk(JSContext* cx, JS::CallArgs& args) {
    ValueReader(cx, args.rval()).fromBSON(BSON("ok" << 1), nullptr, false);
}

void setCursor(MozJSImplScope* scope,
               JS::HandleObject target,
               std::unique_ptr<DBClientCursor> cursor,
               JS::CallArgs& args) {
    auto client =
        static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(args.thisv().toObjectOrNull()));

    // Copy the client shared pointer to up the refcount
    JS::SetPrivate(target, scope->trackedNew<CursorInfo::CursorHolder>(std::move(cursor), *client));
}

void setCursorHandle(MozJSImplScope* scope,
                     JS::HandleObject target,
                     NamespaceString ns,
                     long long cursorId,
                     JS::CallArgs& args) {
    auto client =
        static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(args.thisv().toObjectOrNull()));

    // Copy the client shared pointer to up the refcount.
    JS::SetPrivate(
        target,
        scope->trackedNew<CursorHandleInfo::CursorTracker>(std::move(ns), cursorId, *client));
}

void setHiddenMongo(JSContext* cx, JS::HandleValue value, JS::CallArgs& args) {
    ObjectWrapper o(cx, args.rval());
    if (!o.hasField(InternedString::_mongo)) {
        o.defineProperty(InternedString::_mongo, value, JSPROP_READONLY | JSPROP_PERMANENT);
    }
}

void setHiddenMongo(JSContext* cx, JS::CallArgs& args) {
    setHiddenMongo(cx, args.thisv(), args);
}

void setHiddenMongo(JSContext* cx,
                    std::shared_ptr<DBClientBase> resPtr,
                    DBClientBase* origConn,
                    JS::CallArgs& args) {
    ObjectWrapper o(cx, args.rval());
    // If the connection that ran the command is the same as conn, then we set a hidden "_mongo"
    // property on the returned object that is just "this" Mongo object.
    if (resPtr.get() == origConn) {
        setHiddenMongo(cx, args.thisv(), args);
    } else {
        JS::RootedObject newMongo(cx);

        auto scope = getScope(cx);
        scope->getProto<MongoExternalInfo>().newObject(&newMongo);

        auto host = resPtr->getServerAddress();
        JS::SetPrivate(newMongo,
                       scope->trackedNew<std::shared_ptr<DBClientBase>>(std::move(resPtr)));

        ObjectWrapper from(cx, args.thisv());
        ObjectWrapper to(cx, newMongo);
        for (const auto& k :
             {InternedString::slaveOk, InternedString::defaultDB, InternedString::authenticated}) {
            JS::RootedValue tmpValue(cx);
            from.getValue(k, &tmpValue);
            to.setValue(k, tmpValue);
        }

        // 'newMongo' is a direct connection to an individual server. Its "host" property therefore
        // reports the stringified HostAndPort of the underlying DBClientConnection.
        to.setString(InternedString::host, host);

        JS::RootedValue value(cx);
        value.setObjectOrNull(newMongo);
        setHiddenMongo(cx, value, args);
    }
}

EncryptionCallbacks* getEncryptionCallbacks(DBClientBase* conn) {
    auto callbackPtr = dynamic_cast<EncryptionCallbacks*>(conn);
    uassert(31083,
            "Field Level Encryption must be used in enterprise mode with the correct parameters",
            callbackPtr != nullptr);
    return callbackPtr;
}

}  // namespace

void MongoBase::finalize(JSFreeOp* fop, JSObject* obj) {
    auto conn = static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(obj));

    if (conn) {
        getScope(fop)->trackedDelete(conn);
    }
}

void MongoBase::trace(JSTracer* trc, JSObject* obj) {
    auto conn = static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(obj));
    if (!conn) {
        return;
    }
    auto callbackPtr = dynamic_cast<EncryptionCallbacks*>(conn->get());
    if (callbackPtr != nullptr) {
        callbackPtr->trace(trc);
    }
}

void MongoBase::Functions::close::call(JSContext* cx, JS::CallArgs args) {
    getConnection(args);

    auto thisv = args.thisv().toObjectOrNull();
    auto conn = static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(thisv));

    conn->reset();

    args.rval().setUndefined();
}

namespace {

/**
 * Common implementation for:
 *   object Mongo._runCommandImpl(string dbname, object cmd, int options, object token)
 *
 * Extra is for connection-wide metadata to pass with any given runCommand.
 */
template <typename Params, typename MakeRequest>
void doRunCommand(JSContext* cx, JS::CallArgs args, MakeRequest makeRequest) {
    uassert(ErrorCodes::BadValue,
            str::stream() << Params::kCommandName << " needs 4 args",
            args.length() >= 4);
    uassert(ErrorCodes::BadValue,
            str::stream() << "The database parameter to " << Params::kCommandName
                          << " must be a string",
            args.get(0).isString());
    uassert(ErrorCodes::BadValue,
            str::stream() << "The " << Params::kArg1Name << " parameter to " << Params::kCommandName
                          << " must be an object",
            args.get(1).isObject());

    // Arg2 is specialization defined, see makeRequest().

    auto database = ValueWriter(cx, args.get(0)).toString();
    auto arg = ValueWriter(cx, args.get(1)).toBSON();

    auto request = makeRequest(database, arg);
    if (auto tokenArg = args.get(3); tokenArg.isObject()) {
        using VTS = auth::ValidatedTenancyScope;
        if (auto token = ValueWriter(cx, tokenArg).toBSON(); token.nFields() > 0) {
            request.validatedTenancyScope = VTS(token, VTS::InitTag::kInitForShell);
        }
    } else {
        uassert(ErrorCodes::BadValue,
                str::stream() << "The token parameter to " << Params::kCommandName
                              << " must be an object",
                tokenArg.isUndefined());
    }

    const auto& conn = getConnectionRef(args);
    if (isUnacknowledged(request.body)) {
        conn->runFireAndForgetCommand(request);
        setHiddenMongo(cx, args);
        returnOk(cx, args);
        return;
    }

    auto res = conn->runCommandWithTarget(request, conn);

    auto reply = std::get<0>(res)->getCommandReply();
    if constexpr (Params::kHoistReply) {
        constexpr auto kCommandReplyField = "commandReply"_sd;
        reply = BSON(kCommandReplyField << reply);
    } else {
        // The returned object is not read only as some of our tests depend on modifying it.
        // Make a copy here because we want a copy after we dump cmdRes
        reply = reply.getOwned();
    }

    ValueReader(cx, args.rval()).fromBSON(reply, nullptr, false /* read only */);
    setHiddenMongo(cx, std::get<1>(res), conn.get(), args);

    ObjectWrapper o(cx, args.rval());
    if (!o.hasField(InternedString::_commandObj)) {
        o.defineProperty(
            InternedString::_commandObj, args.get(1), JSPROP_READONLY | JSPROP_PERMANENT);
    }
}

}  // namespace

struct RunCommandParams {
    static constexpr bool kHoistReply = false;
    static constexpr auto kCommandName = "runCommand"_sd;
    static constexpr auto kArg1Name = "cmdObj"_sd;
};

void MongoBase::Functions::_runCommandImpl::call(JSContext* cx, JS::CallArgs args) {
    doRunCommand<RunCommandParams>(cx, args, [&](StringData database, BSONObj cmd) {
        uassert(ErrorCodes::BadValue,
                str::stream() << "The options parameter to runCommand must be a number",
                args.get(2).isNumber());
        auto options = ValueWriter(cx, args.get(2)).toInt32();
        return rpc::upconvertRequest(database, cmd, options);
    });
}

namespace {
/**
 * WARNING: Do not add new callers! This is a special-purpose function that exists only to
 * accommodate the shell.
 *
 * Although OP_QUERY find is no longer supported by either the shell or the server, the shell's
 * exhaust path still internally constructs a request that resembles on OP_QUERY find. This function
 * converts this query to a 'FindCommandRequest'.
 */
FindCommandRequest upconvertLegacyOpQueryToFindCommandRequest(NamespaceString nss,
                                                              const BSONObj& opQueryFormattedBson,
                                                              const BSONObj& projection,
                                                              int limit,
                                                              int skip,
                                                              int batchSize,
                                                              int queryOptions) {
    FindCommandRequest findCommand{std::move(nss)};

    client_deprecated::initFindFromLegacyOptions(opQueryFormattedBson, queryOptions, &findCommand);

    if (!projection.isEmpty()) {
        findCommand.setProjection(projection.getOwned());
    }

    if (limit) {
        // To avoid changing the behavior of the shell API, we allow the caller of the JS code to
        // use a negative limit to request at most a single batch.
        if (limit < 0) {
            findCommand.setLimit(-static_cast<int64_t>(limit));
            findCommand.setSingleBatch(true);
        } else {
            findCommand.setLimit(limit);
        }
    }
    if (skip) {
        findCommand.setSkip(skip);
    }
    if (batchSize) {
        findCommand.setBatchSize(batchSize);
    }

    return findCommand;
}
}  // namespace

void MongoBase::Functions::find::call(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);

    if (args.length() != 7)
        uasserted(ErrorCodes::BadValue, "find needs 7 args");

    if (!args.get(1).isObject())
        uasserted(ErrorCodes::BadValue, "needs to be an object");

    auto conn = getConnection(args);

    std::string ns = ValueWriter(cx, args.get(0)).toString();

    BSONObj fields;
    BSONObj q = ValueWriter(cx, args.get(1)).toBSON();

    bool haveFields = false;

    if (args.get(2).isObject()) {
        JS::RootedObject obj(cx, args.get(2).toObjectOrNull());

        ObjectWrapper(cx, obj).enumerate([&](jsid) {
            haveFields = true;
            return false;
        });
    }

    if (haveFields)
        fields = ValueWriter(cx, args.get(2)).toBSON();

    int limit = ValueWriter(cx, args.get(3)).toInt32();
    int nToSkip = ValueWriter(cx, args.get(4)).toInt32();
    int batchSize = ValueWriter(cx, args.get(5)).toInt32();
    int options = ValueWriter(cx, args.get(6)).toInt32();

    auto findCmd = upconvertLegacyOpQueryToFindCommandRequest(
        NamespaceString{ns}, q, fields, limit, nToSkip, batchSize, options);
    auto readPref = uassertStatusOK(ReadPreferenceSetting::fromContainingBSON(q));
    ExhaustMode exhaustMode =
        ((options & QueryOption_Exhaust) != 0) ? ExhaustMode::kOn : ExhaustMode::kOff;
    std::unique_ptr<DBClientCursor> cursor = conn->find(std::move(findCmd), readPref, exhaustMode);
    if (!cursor.get()) {
        uasserted(ErrorCodes::InternalError, "error doing query: failed");
    }

    JS::RootedObject c(cx);
    scope->getProto<CursorInfo>().newObject(&c);

    setCursor(scope, c, std::move(cursor), args);

    args.rval().setObjectOrNull(c);
}

void MongoBase::Functions::auth::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);
    uassert(ErrorCodes::BadValue, "no connection", conn);
    uassert(ErrorCodes::BadValue, "mongoAuth takes exactly 1 object argument", args.length() == 1);

    conn->auth(ValueWriter(cx, args.get(0)).toBSON());
    args.rval().setBoolean(true);
}

void MongoBase::Functions::generateDataKey::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);
    auto ptr = getEncryptionCallbacks(conn);
    ptr->generateDataKey(cx, args);
}

void MongoBase::Functions::getDataKeyCollection::call(JSContext* cx, JS::CallArgs args) {
    JS::RootedValue collection(cx);
    auto conn = getConnection(args);
    auto ptr = getEncryptionCallbacks(conn);
    ptr->getDataKeyCollection(cx, args);
}

void MongoBase::Functions::encrypt::call(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);
    auto conn = getConnection(args);
    auto ptr = getEncryptionCallbacks(conn);
    ptr->encrypt(scope, cx, args);
}

void MongoBase::Functions::decrypt::call(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);
    auto conn = getConnection(args);
    auto ptr = getEncryptionCallbacks(conn);
    ptr->decrypt(scope, cx, args);
}

void MongoBase::Functions::compact::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);
    auto ptr = getEncryptionCallbacks(conn);
    ptr->compact(cx, args);
}

void MongoBase::Functions::logout::call(JSContext* cx, JS::CallArgs args) {
    if (args.length() != 1)
        uasserted(ErrorCodes::BadValue, "logout needs 1 arg");

    BSONObj ret;

    std::string db = ValueWriter(cx, args.get(0)).toString();

    auto conn = getConnection(args);
    if (conn) {
        conn->logout(db, ret);
    }

    // Make a copy because I want to insulate us from whether conn->logout
    // writes an owned bson or not
    ValueReader(cx, args.rval()).fromBSON(ret.getOwned(), nullptr, false);
}

void MongoBase::Functions::cursorHandleFromId::call(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);

    if (args.length() != 2) {
        uasserted(ErrorCodes::BadValue, "cursorHandleFromId needs 2 args");
    }

    if (!scope->getProto<NumberLongInfo>().instanceOf(args.get(1))) {
        uasserted(ErrorCodes::BadValue, "2nd arg must be a NumberLong");
    }

    // getConnectionRef verifies that the connection is still open
    getConnectionRef(args);

    std::string ns = ValueWriter(cx, args.get(0)).toString();
    long long cursorId = NumberLongInfo::ToNumberLong(cx, args.get(1));

    JS::RootedObject c(cx);
    scope->getProto<CursorHandleInfo>().newObject(&c);

    setCursorHandle(scope, c, NamespaceString(ns), cursorId, args);

    args.rval().setObjectOrNull(c);
}

void MongoBase::Functions::isReplicaSetConnection::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    if (args.length() != 0) {
        uasserted(ErrorCodes::BadValue, "isReplicaSetConnection takes no args");
    }

    args.rval().setBoolean(conn->type() == ConnectionString::ConnectionType::kReplicaSet);
}

void MongoBase::Functions::_markNodeAsFailed::call(JSContext* cx, JS::CallArgs args) {
    if (args.length() != 3) {
        uasserted(ErrorCodes::BadValue, "_markNodeAsFailed needs 3 args");
    }

    if (!args.get(0).isString()) {
        uasserted(ErrorCodes::BadValue,
                  "first argument to _markNodeAsFailed must be a stringified host and port");
    }

    if (!args.get(1).isNumber()) {
        uasserted(ErrorCodes::BadValue,
                  "second argument to _markNodeAsFailed must be a numeric error code");
    }

    if (!args.get(2).isString()) {
        uasserted(ErrorCodes::BadValue,
                  "third argument to _markNodeAsFailed must be a stringified reason");
    }

    auto* rsConn = dynamic_cast<DBClientReplicaSet*>(getConnection(args));
    if (!rsConn) {
        uasserted(ErrorCodes::BadValue, "connection object isn't a replica set connection");
    }

    auto hostAndPort = ValueWriter(cx, args.get(0)).toString();
    auto code = ValueWriter(cx, args.get(1)).toInt32();
    auto reason = ValueWriter(cx, args.get(2)).toString();

    const auto& replicaSetName = rsConn->getSetName();
    ReplicaSetMonitor::get(replicaSetName)
        ->failedHost(HostAndPort(hostAndPort),
                     Status{static_cast<ErrorCodes::Error>(code), reason});

    args.rval().setUndefined();
}

std::unique_ptr<DBClientBase> runEncryptedDBClientCallback(std::unique_ptr<DBClientBase> conn,
                                                           JS::HandleValue arg,
                                                           JS::HandleObject mongoConnection,
                                                           JSContext* cx) {
    if (encryptedDBClientCallback != nullptr) {
        return encryptedDBClientCallback(std::move(conn), arg, mongoConnection, cx);
    }
    return conn;
}

void setEncryptedDBClientCallback(EncryptedDBClientCallback* callback) {
    encryptedDBClientCallback = callback;
}

// "new Mongo(uri, encryptedDBClientCallback, {options...})"
void MongoExternalInfo::construct(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);

    std::string host("127.0.0.1");

    if (args.length() > 0 && args.get(0).isString()) {
        host = ValueWriter(cx, args.get(0)).toString();
    }

    auto cs = uassertStatusOK(MongoURI::parse(host));

    ClientAPIVersionParameters apiParameters;
    if (args.length() > 2 && !args.get(2).isUndefined()) {
        uassert(4938000,
                str::stream() << "the 'options' parameter to Mongo() must be an object",
                args.get(2).isObject());
        auto options = ValueWriter(cx, args.get(2)).toBSON();
        if (options.hasField("api")) {
            uassert(4938001,
                    "the 'api' option for Mongo() must be an object",
                    options["api"].isABSONObj());
            apiParameters = ClientAPIVersionParameters::parse(IDLParserErrorContext("api"_sd),
                                                              options["api"].Obj());
            if (apiParameters.getDeprecationErrors().value_or(false) ||
                apiParameters.getStrict().value_or(false)) {
                uassert(4938002,
                        "the 'api' option for Mongo() must include 'version' if it includes "
                        "'strict' or "
                        "'deprecationErrors'",
                        apiParameters.getVersion());
            }
        }
    }

    boost::optional<std::string> appname = cs.getAppName();
    std::string errmsg;
    std::unique_ptr<DBClientBase> conn(
        cs.connect(appname.value_or("MongoDB Shell"), errmsg, boost::none, &apiParameters));

    if (!conn.get()) {
        uasserted(ErrorCodes::InternalError, errmsg);
    }

    ScriptEngine::runConnectCallback(*conn, host);

    JS::RootedObject thisv(cx);
    scope->getProto<MongoExternalInfo>().newObject(&thisv);
    ObjectWrapper o(cx, thisv);

    conn = runEncryptedDBClientCallback(std::move(conn), args.get(1), thisv, cx);

    JS::SetPrivate(thisv, scope->trackedNew<std::shared_ptr<DBClientBase>>(conn.release()));

    o.setBoolean(InternedString::slaveOk, false);
    o.setString(InternedString::host, cs.connectionString().toString());
    auto defaultDB = cs.getDatabase() == "" ? "test" : cs.getDatabase();
    o.setString(InternedString::defaultDB, defaultDB);

    // Adds a property to the Mongo connection object.
    boost::optional<bool> retryWrites = cs.getRetryWrites();
    // If retryWrites is not explicitly set in uri, sessions created on this connection default to
    // the global retryWrites value. This is checked in sessions.js by using the injected
    // _shouldRetryWrites() function, which returns true if the --retryWrites flag was passed.
    if (retryWrites) {
        o.setBoolean(InternedString::_retryWrites, retryWrites.get());
    }

    args.rval().setObjectOrNull(thisv);
}

void MongoBase::Functions::getMinWireVersion::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    args.rval().setInt32(conn->getMinWireVersion());
}

void MongoBase::Functions::getMaxWireVersion::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    args.rval().setInt32(conn->getMaxWireVersion());
}

void MongoBase::Functions::isReplicaSetMember::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    args.rval().setBoolean(conn->isReplicaSetMember());
}

void MongoBase::Functions::isMongos::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    args.rval().setBoolean(conn->isMongos());
}

void MongoBase::Functions::isTLS::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);

    args.rval().setBoolean(conn->isTLS());
}

void MongoBase::Functions::getApiParameters::call(JSContext* cx, JS::CallArgs args) {
    auto conn = getConnection(args);
    ValueReader(cx, args.rval()).fromBSON(conn->getApiParameters().toBSON(), nullptr, false);
}

void MongoBase::Functions::_startSession::call(JSContext* cx, JS::CallArgs args) {
    auto client =
        static_cast<std::shared_ptr<DBClientBase>*>(JS::GetPrivate(args.thisv().toObjectOrNull()));

    LogicalSessionIdToClient id;
    id.setId(UUID::gen());

    JS::RootedObject obj(cx);
    SessionInfo::make(cx, &obj, *client, id.toBSON());

    args.rval().setObjectOrNull(obj.get());
}

void MongoExternalInfo::Functions::load::call(JSContext* cx, JS::CallArgs args) {
    auto scope = getScope(cx);

    for (unsigned i = 0; i < args.length(); ++i) {
        std::string filename = ValueWriter(cx, args.get(i)).toString();

        if (!scope->execFile(filename, false, true)) {
            uasserted(ErrorCodes::BadValue, std::string("error loading js file: ") + filename);
        }
    }

    args.rval().setBoolean(true);
}

void MongoExternalInfo::Functions::quit::call(JSContext* cx, JS::CallArgs args) {
    quickExit(args.get(0).isNumber() ? args.get(0).toNumber() : 0);
}

void MongoExternalInfo::Functions::_forgetReplSet::call(JSContext* cx, JS::CallArgs args) {
    if (args.length() != 1) {
        uasserted(ErrorCodes::BadValue,
                  str::stream() << "_forgetReplSet takes exactly 1 argument, but was given "
                                << args.length());
    }

    std::string rsName = ValueWriter(cx, args.get(0)).toString();
    ReplicaSetMonitorManager::get()->removeMonitor(rsName);

    args.rval().setUndefined();
}

}  // namespace mozjs
}  // namespace mongo