realm-js/parser/parser.hpp

////////////////////////////////////////////////////////////////////////////
//
// Copyright 2015 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////

#ifndef REALM_EXTERNAL_COMMIT_HELPER_HPP
#define REALM_EXTERNAL_COMMIT_HELPER_HPP

#include <vector>
#include <string>

namespace realm {
    class Query;
    class Schema;

    namespace parser {
        struct Expression
        {
            enum class Type
            {
                Number,
                String,
                KeyPath,
            };
            Type type;
            
            std::string s;
        };

        struct Predicate
        {
            enum class Type
            {
                None,
                Comparison,
                Or,
                And,
                True,
                False,
            };
            Type type = Type::None;

            // for comparison
            enum class Operator
            {
                None,
                Equal,
                NotEqual,
                LessThan,
                LessThanOrEqual,
                GreaterThan,
                GreaterThanOrEqual,
                BeginsWith,
                EndsWith,
                Contains,
            };
            Operator op = Operator::None;
            std::vector<Expression> sub_expressions;

            // for compounds
            std::vector<Predicate> sub_predicates;

            bool negate;
        };

        Predicate parse(const std::string &query);

        void apply_predicate(Query &query, Predicate &predicate, Schema &schema, std::string objectType);
    }
}

#endif // REALM_EXTERNAL_COMMIT_HELPER_HPP