memgraph/include/storage/edge_accessor.hpp

#pragma once

#include "storage/edge.hpp"
#include "storage/edge_record.hpp"
#include "storage/record_accessor.hpp"
#include "storage/vertex_accessor.hpp"
#include "utils/assert.hpp"
#include "utils/reference_wrapper.hpp"

class EdgeType;
using edge_type_ref_t = ReferenceWrapper<const EdgeType>;

class Edges;

// There exists circular dependecy with VertexAccessor.
class EdgeAccessor : public RecordAccessor<TypeGroupEdge, EdgeAccessor>
{
    friend VertexAccessor;

public:
    using RecordAccessor::RecordAccessor;

    using record_t = Edge;
    using record_list_t = EdgeRecord;

    // Removes self and disconects vertices from it.
    void remove() const;

    void edge_type(EdgeType const &edge_type);

    const EdgeType &edge_type() const;

    // EdgeAccessor doesnt need to be filled
    VertexAccessor from() const;

    // EdgeAccessor doesnt need to be filled
    VertexAccessor to() const;

    template <typename Stream>
    void stream_repr(Stream& stream) const
    {
        auto from_va = from();
        auto to_va = to();

        from_va.fill();
        to_va.fill();

        from_va.stream_repr(stream);
        stream << '-';
        this->record->stream_repr(stream);
        stream << "->";
        to_va.stream_repr(stream);
        stream << '\n';
    }
};