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#include <Parsers/Access/ParserRolesOrUsersSet.h>
#include <Parsers/Access/ASTRolesOrUsersSet.h>
#include <Parsers/Access/parseUserName.h>
#include <Parsers/ASTLiteral.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/ExpressionElementParsers.h>
#include <Parsers/ExpressionListParsers.h>
#include <boost/range/algorithm/find.hpp>
namespace DB
{
namespace
{
bool parseNameOrID(IParserBase::Pos & pos, Expected & expected, bool id_mode, String & res)
{
return IParserBase::wrapParseImpl(pos, [&]
{
if (!id_mode)
return parseRoleName(pos, expected, res);
if (!ParserKeyword{"ID"}.ignore(pos, expected))
return false;
if (!ParserToken(TokenType::OpeningRoundBracket).ignore(pos, expected))
return false;
ASTPtr ast;
if (!ParserStringLiteral{}.parse(pos, ast, expected))
return false;
String id = ast->as<ASTLiteral &>().value.safeGet<String>();
if (!ParserToken(TokenType::ClosingRoundBracket).ignore(pos, expected))
return false;
res = std::move(id);
return true;
});
}
bool parseBeforeExcept(
IParserBase::Pos & pos,
Expected & expected,
bool id_mode,
bool allow_all,
bool allow_any,
bool allow_current_user,
bool & all,
Strings & names,
bool & current_user)
{
bool res_all = false;
Strings res_names;
bool res_current_user = false;
Strings res_with_roles_names;
auto parse_element = [&]
{
if (ParserKeyword{"NONE"}.ignore(pos, expected))
return true;
if (allow_all && ParserKeyword{"ALL"}.ignore(pos, expected))
{
res_all = true;
return true;
}
if (allow_any && ParserKeyword{"ANY"}.ignore(pos, expected))
{
res_all = true;
return true;
}
if (allow_current_user && parseCurrentUserTag(pos, expected))
{
res_current_user = true;
return true;
}
String name;
if (parseNameOrID(pos, expected, id_mode, name))
{
res_names.emplace_back(std::move(name));
return true;
}
return false;
};
if (!ParserList::parseUtil(pos, expected, parse_element, false))
return false;
names = std::move(res_names);
current_user = res_current_user;
all = res_all;
return true;
}
bool parseExceptAndAfterExcept(
IParserBase::Pos & pos,
Expected & expected,
bool id_mode,
bool allow_current_user,
Strings & except_names,
bool & except_current_user)
{
return IParserBase::wrapParseImpl(pos, [&] {
if (!ParserKeyword{"EXCEPT"}.ignore(pos, expected))
return false;
bool unused;
return parseBeforeExcept(pos, expected, id_mode, false, false, allow_current_user, unused, except_names, except_current_user);
});
}
}
bool ParserRolesOrUsersSet::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
{
bool all = false;
Strings names;
bool current_user = false;
Strings except_names;
bool except_current_user = false;
if (!parseBeforeExcept(pos, expected, id_mode, allow_all, allow_any, allow_current_user, all, names, current_user))
return false;
parseExceptAndAfterExcept(pos, expected, id_mode, allow_current_user, except_names, except_current_user);
if (all)
names.clear();
auto result = std::make_shared<ASTRolesOrUsersSet>();
result->names = std::move(names);
result->current_user = current_user;
result->all = all;
result->except_names = std::move(except_names);
result->except_current_user = except_current_user;
result->allow_users = allow_users;
result->allow_roles = allow_roles;
result->id_mode = id_mode;
result->use_keyword_any = all && allow_any && !allow_all;
node = result;
return true;
}
}
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