// utils.cpp
/*
 *    Copyright (C) 2010 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/scripting/engine.h"
#include "mongo/util/md5.hpp"
#include "mongo/util/version.h"

namespace mongo {

static BSONObj native_hex_md5(const BSONObj& args, void* data) {
    uassert(10261,
            "hex_md5 takes a single string argument -- hex_md5(string)",
            args.nFields() == 1 && args.firstElement().type() == String);
    const char* s = args.firstElement().valuestrsafe();

    md5digest d;
    md5_state_t st;
    md5_init(&st);
    md5_append(&st, (const md5_byte_t*)s, strlen(s));
    md5_finish(&st, d);

    return BSON("" << digestToString(d));
}

static BSONObj native_version(const BSONObj& args, void* data) {
    return BSON("" << versionString);
}

static BSONObj native_sleep(const mongo::BSONObj& args, void* data) {
    uassert(16259,
            "sleep takes a single numeric argument -- sleep(milliseconds)",
            args.nFields() == 1 && args.firstElement().isNumber());
    sleepmillis(static_cast<long long>(args.firstElement().number()));

    BSONObjBuilder b;
    b.appendUndefined("");
    return b.obj();
}

// ---------------------------------
// ---- installer           --------
// ---------------------------------

void installGlobalUtils(Scope& scope) {
    scope.injectNative("hex_md5", native_hex_md5);
    scope.injectNative("version", native_version);
    scope.injectNative("sleep", native_sleep);
}
}