/**
 *    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/db/index_names.h"

#include "mongo/db/jsobj.h"

namespace mongo {

using std::string;

const string IndexNames::GEO_2D = "2d";
const string IndexNames::GEO_HAYSTACK = "geoHaystack";
const string IndexNames::GEO_2DSPHERE = "2dsphere";
const string IndexNames::TEXT = "text";
const string IndexNames::HASHED = "hashed";
const string IndexNames::BTREE = "";

// static
string IndexNames::findPluginName(const BSONObj& keyPattern) {
    BSONObjIterator i(keyPattern);

    while (i.more()) {
        BSONElement e = i.next();
        if (String != e.type()) {
            continue;
        }
        return e.String();
    }

    return IndexNames::BTREE;
}

// static
bool IndexNames::existedBefore24(const string& name) {
    return name == IndexNames::BTREE || name == IndexNames::GEO_2D ||
        name == IndexNames::GEO_HAYSTACK || name == IndexNames::HASHED;
}

// static
bool IndexNames::isKnownName(const string& name) {
    return name == IndexNames::GEO_2D || name == IndexNames::GEO_2DSPHERE ||
        name == IndexNames::GEO_HAYSTACK || name == IndexNames::TEXT ||
        name == IndexNames::HASHED || name == IndexNames::BTREE;
}

// static
IndexType IndexNames::nameToType(const string& accessMethod) {
    if (IndexNames::GEO_2D == accessMethod) {
        return INDEX_2D;
    } else if (IndexNames::GEO_HAYSTACK == accessMethod) {
        return INDEX_HAYSTACK;
    } else if (IndexNames::GEO_2DSPHERE == accessMethod) {
        return INDEX_2DSPHERE;
    } else if (IndexNames::TEXT == accessMethod) {
        return INDEX_TEXT;
    } else if (IndexNames::HASHED == accessMethod) {
        return INDEX_HASHED;
    } else {
        return INDEX_BTREE;
    }
}

}  // namespace mongo