path: root/libsolidity/ast/ASTJsonConverter.h

/*
    This file is part of solidity.

    solidity is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    solidity 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Lefteris <lefteris@ethdev.com>
 * @date 2015
 * Converts the AST into json format
 */

#pragma once

#include <ostream>
#include <stack>
#include <libsolidity/ast/ASTVisitor.h>
#include <liblangutil/Exceptions.h>
#include <libsolidity/ast/ASTAnnotations.h>
#include <json/json.h>

namespace langutil
{
struct SourceLocation;
}

namespace dev
{
namespace solidity
{

/**
 * Converter of the AST into JSON format
 */
class ASTJsonConverter: public ASTConstVisitor
{
public:
    /// Create a converter to JSON for the given abstract syntax tree.
    /// @a _legacy if true, use legacy format
    /// @a _sourceIndices is used to abbreviate source names in source locations.
    explicit ASTJsonConverter(
        bool _legacy,
        std::map<std::string, unsigned> _sourceIndices = std::map<std::string, unsigned>()
    );
    /// Output the json representation of the AST to _stream.
    void print(std::ostream& _stream, ASTNode const& _node);
    Json::Value&& toJson(ASTNode const& _node);
    template <class T>
    Json::Value toJson(std::vector<ASTPointer<T>> const& _nodes)
    {
        Json::Value ret(Json::arrayValue);
        for (auto const& n: _nodes)
            if (n)
                appendMove(ret, toJson(*n));
            else
                ret.append(Json::nullValue);
        return ret;
    }
    bool visit(SourceUnit const& _node) override;
    bool visit(PragmaDirective const& _node) override;
    bool visit(ImportDirective const& _node) override;
    bool visit(ContractDefinition const& _node) override;
    bool visit(InheritanceSpecifier const& _node) override;
    bool visit(UsingForDirective const& _node) override;
    bool visit(StructDefinition const& _node) override;
    bool visit(EnumDefinition const& _node) override;
    bool visit(EnumValue const& _node) override;
    bool visit(ParameterList const& _node) override;
    bool visit(FunctionDefinition const& _node) override;
    bool visit(VariableDeclaration const& _node) override;
    bool visit(ModifierDefinition const& _node) override;
    bool visit(ModifierInvocation const& _node) override;
    bool visit(EventDefinition const& _node) override;
    bool visit(ElementaryTypeName const& _node) override;
    bool visit(UserDefinedTypeName const& _node) override;
    bool visit(FunctionTypeName const& _node) override;
    bool visit(Mapping const& _node) override;
    bool visit(ArrayTypeName const& _node) override;
    bool visit(InlineAssembly const& _node) override;
    bool visit(Block const& _node) override;
    bool visit(PlaceholderStatement const& _node) override;
    bool visit(IfStatement const& _node) override;
    bool visit(WhileStatement const& _node) override;
    bool visit(ForStatement const& _node) override;
    bool visit(Continue const& _node) override;
    bool visit(Break const& _node) override;
    bool visit(Return const& _node) override;
    bool visit(Throw const& _node) override;
    bool visit(EmitStatement const& _node) override;
    bool visit(VariableDeclarationStatement const& _node) override;
    bool visit(ExpressionStatement const& _node) override;
    bool visit(Conditional const& _node) override;
    bool visit(Assignment const& _node) override;
    bool visit(TupleExpression const& _node) override;
    bool visit(UnaryOperation const& _node) override;
    bool visit(BinaryOperation const& _node) override;
    bool visit(FunctionCall const& _node) override;
    bool visit(NewExpression const& _node) override;
    bool visit(MemberAccess const& _node) override;
    bool visit(IndexAccess const& _node) override;
    bool visit(Identifier const& _node) override;
    bool visit(ElementaryTypeNameExpression const& _node) override;
    bool visit(Literal const& _node) override;

    void endVisit(EventDefinition const&) override;

private:
    void setJsonNode(
        ASTNode const& _node,
        std::string const& _nodeName,
        std::initializer_list<std::pair<std::string, Json::Value>>&& _attributes
    );
    void setJsonNode(
        ASTNode const& _node,
        std::string const& _nodeName,
        std::vector<std::pair<std::string, Json::Value>>&& _attributes
    );
    std::string sourceLocationToString(langutil::SourceLocation const& _location) const;
    static std::string namePathToString(std::vector<ASTString> const& _namePath);
    static Json::Value idOrNull(ASTNode const* _pt)
    {
        return _pt ? Json::Value(nodeId(*_pt)) : Json::nullValue;
    }
    Json::Value toJsonOrNull(ASTNode const* _node)
    {
        return _node ? toJson(*_node) : Json::nullValue;
    }
    Json::Value inlineAssemblyIdentifierToJson(std::pair<assembly::Identifier const* , InlineAssemblyAnnotation::ExternalIdentifierInfo> _info) const;
    static std::string location(VariableDeclaration::Location _location);
    static std::string contractKind(ContractDefinition::ContractKind _kind);
    static std::string functionCallKind(FunctionCallKind _kind);
    static std::string literalTokenKind(Token _token);
    static std::string type(Expression const& _expression);
    static std::string type(VariableDeclaration const& _varDecl);
    static int nodeId(ASTNode const& _node)
    {
        return _node.id();
    }
    template<class Container>
    static Json::Value getContainerIds(Container const& container)
    {
        Json::Value tmp(Json::arrayValue);
        for (auto const& element: container)
        {
            solAssert(element, "");
            tmp.append(nodeId(*element));
        }
        return tmp;
    }
    static Json::Value typePointerToJson(TypePointer _tp, bool _short = false);
    static Json::Value typePointerToJson(std::shared_ptr<std::vector<TypePointer>> _tps);
    void appendExpressionAttributes(
        std::vector<std::pair<std::string, Json::Value>> &_attributes,
        ExpressionAnnotation const& _annotation
    );
    static void appendMove(Json::Value& _array, Json::Value&& _value)
    {
        solAssert(_array.isArray(), "");
        _array.append(std::move(_value));
    }

    bool m_legacy = false; ///< if true, use legacy format
    bool m_inEvent = false; ///< whether we are currently inside an event or not
    Json::Value m_currentValue;
    std::map<std::string, unsigned> m_sourceIndices;
};

}
}