func DB.GetLatestVersion(name)
{
    var sql = $"SELECT * FROM packages p join versions v on p.id = v.packageId and v.version = (SELECT MAX(version) FROM versions WHERE packageId = v.packageId) and p.packageName = {Sqlite.Escape(name)};";
    DB.Lock();
    var dbCon = DB.Open();
    var res = Sqlite.Exec(dbCon, sql);
    DB.Unlock();

    if(TypeOf(res) == "List" && res.Length > 0)
    {
        return Version.FromLong(ParseLong(res[0].version)).ToString();
    }
    return null;
}
func DB.GetPackageVersions(name)
{
    var sql = $"SELECT * FROM packages p inner join versions v on p.id = v.packageId inner join accounts a on p.accountId = a.id WHERE p.packageName = {Sqlite.Escape(name)} ORDER BY v.version DESC;";
    var dbCon = DB.Open();
    var res = Sqlite.Exec(dbCon, sql);
    
    Sqlite.Close(dbCon);
    DB.Unlock();

    var list = [];
    each(var item : res)
    {
        var version = Version.FromLong(ParseLong(item.version)).ToString();
        var uploadTime = ParseLong(item.uploadTime);
        list.Add({
            version,
            download = $"./api/v1/download?name={Net.Http.UrlEncode(name)}&version={Net.Http.UrlEncode(version)}",
            docs = $"./package_docs?name={Net.Http.UrlEncode(name)}&version={Net.Http.UrlEncode(version)}",
            accountName = item.accountName,
            description = item.description,
            maintainer = item.maintainer,
            type = item.type,
            repo = item.repo,
            homepage = item.homepage,
            license = item.license,
            uploadTime,
            uploadDate=new DateTime(uploadTime).ToString("%Y/%m/%d %H:%M:%S UTC")
        });
    }
    return list;
}
func DB.UpdateVersion(pkgInfo)
{

    DB.Lock();
    var dbCon = DB.Open();
    var exec = Sqlite.Exec(dbCon,$"SELECT * FROM packages WHERE packageName = {Sqlite.Escape(pkgInfo.Name)};");
    var pkgId = 0;

    if(TypeOf(exec) == "List" && exec.Length == 1)
    {
        pkgId = exec[0].id;
    }
    var version = pkgInfo.Version.VersionInt;
    var info = Json.Decode(pkgInfo.Info);
    var description = info.description;
    var type = info.type;
    var maintainer = info.maintainer;
    var homepage = info.homepage;
    var repo = info.repo;
    var license = info.license;
    if(TypeOf(description) != "String") description="";

    if(TypeOf(type) != "String") type="";

    if(TypeOf(maintainer) != "String") maintainer="";

    if(TypeOf(homepage) != "String") homepage="";
    
    if(TypeOf(repo) != "String") repo="";

    if(TypeOf(license) != "String") license="";
    
    //CREATE TABLE IF NOT EXISTS versions (id INTEGER PRIMARY KEY AUTOINCREMENT, packageId INTEGER, version INTEGER, description TEXT, type TEXT, maintainer TEXT, homepage TEXT, repo TEXT, license TEXT);
    //VALUES ({pkgId},{version},{Sqlite.Escape(description)},{Sqlite.Escape(type)},{Sqlite.Escape(maintainer)},{Sqlite.Escape(homepage)},{Sqlite.Escape(repo)},{Sqlite.Escape(license)});
    Sqlite.Exec(dbCon,$"UPDATE versions SET description = {Sqlite.Escape(description)}, type = {Sqlite.Escape(type)}, maintainer = {Sqlite.Escape(maintainer)}, homepage = {Sqlite.Escape(homepage)}, repo = {Sqlite.Escape(repo)}, license = {Sqlite.Escape(license)}, uploadTime = {DateTime.NowEpoch} WHERE packageId = {pkgId} AND version = {version};");
    Sqlite.Close(dbCon);
    DB.Unlock();

}
func DB.AddVersion(pkgInfo)
{
    DB.Lock();
    var dbCon = DB.Open();
    var exec = Sqlite.Exec(dbCon,$"SELECT * FROM packages WHERE packageName = {Sqlite.Escape(pkgInfo.Name)};");
    var pkgId = 0;

    if(TypeOf(exec) == "List" && exec.Length == 1)
    {
        pkgId = exec[0].id;
    }
    var version = pkgInfo.Version.VersionInt;
    var info = Json.Decode(pkgInfo.Info);
    var description = info.description;
    var type = info.type;
    var maintainer = info.maintainer;
    var homepage = info.homepage;
    var repo = info.repo;
    var license = info.license;
    if(TypeOf(description) != "String") description="";

    if(TypeOf(type) != "String") type="";

    if(TypeOf(maintainer) != "String") maintainer="";

    if(TypeOf(homepage) != "String") homepage="";
    
    if(TypeOf(repo) != "String") repo="";

    if(TypeOf(license) != "String") license="";
    
    //CREATE TABLE IF NOT EXISTS versions (id INTEGER PRIMARY KEY AUTOINCREMENT, packageId INTEGER, version INTEGER, description TEXT, type TEXT, maintainer TEXT, homepage TEXT, repo TEXT, license TEXT);

    Sqlite.Exec(dbCon,$"INSERT INTO versions (packageId,version,description,type,maintainer,homepage,repo,license,uploadTime) VALUES ({pkgId},{version},{Sqlite.Escape(description)},{Sqlite.Escape(type)},{Sqlite.Escape(maintainer)},{Sqlite.Escape(homepage)},{Sqlite.Escape(repo)},{Sqlite.Escape(license)},{DateTime.NowEpoch});");
    Sqlite.Close(dbCon);
    DB.Unlock();

}