gplib/include/gp/enveloppe/cbor.hpp

#pragma once

#include <gp/pair.hpp>
#include <gp/optional.hpp>
#include <gp/variant.hpp>
#include <gp/vector.hpp>


namespace gp {
	enum class cbor_type {
		uint = 0,
		nint = 1,
		bstr = 2,
		tstr = 3,
		list = 4,
		hmap = 5,
		tags = 6,
		oths = 7
	};

	enum class cbor_oths {
		value_false = 20,
		value_true = 21,
		value_null = 22,
		value_undefined = 23,
		byte = 24,
		word = 25,
		dword = 26,
		qword = 27,
		terminator = 31
	};

	enum class cbor_tags {
		datetime = 0,
		unix_time = 1,
		ubignum = 2,
		nbignum = 3,
		decimal = 4,
		bigfloat = 5,
		cose_encrypt0 = 16,
		cose_mac0 = 17,
		cose_sign1 = 18,
		expected_base64url = 21,
		expected_base64 = 22,
		expected_base16 = 23,
		encoded_cbor = 24,
		url = 32,
		base64url = 33,
		base64 = 34,
		regexp = 35,
		mime = 36,
		cose_encrypt = 96,
		cose_mac = 97,
		cose_sign = 98,
		signature = 55799
	};

	using cbor_number = gp::fixed_variant<
		int8_t,
		uint8_t,
		int16_t,
		uint16_t,
		int32_t,
		uint32_t,
		int64_t,
		uint64_t
	>; 

	using cbor_floating_point = gp::fixed_variant<
		float,
		double
	>; 

	struct undefined_t final {};

	template<typename T>
	using cbor_composite = gp::fixed_variant<
		cbor_number,
		gp::buffer<std::byte>,
		bool,
		gp::vector<T>,
		gp::vector<gp::pair<T, T>>,
		gp::nullopt_t,
		undefined_t,
		cbor_floating_point
	>;

	class cbor_value {

		cbor_composite<cbor_value> contents;
		gp::reference_wrapper<allocator> alloc;
	public:

		cbor_value(allocator& alloc_v)
		: contents(cbor_composite<cbor_value>(undefined_t{}))
		, alloc(alloc_v)
		{}

		cbor_value(cbor_number number, allocator& alloc_v)
		: contents(number)
		, alloc(alloc_v)
		{}

		cbor_value(const cbor_value& oth)
		: contents(oth.contents)
		, alloc(oth.alloc)
		{}

		cbor_value(cbor_value&& oth)
		: contents(gp::move(oth.contents))
		, alloc(gp::move(oth.alloc))
		{}

		cbor_value& operator=(cbor_value& value) {
			contents = value.contents;
			alloc = value.alloc;
			return *this;
		}

		cbor_value& operator=(cbor_value&& value) {
			gp::swap(contents, value.contents);
			gp::swap(alloc, value.alloc);
			return *this;
		}

		cbor_value& operator=(cbor_composite<cbor_value>& value) {
			contents = value;
			return *this;
		}

		template<typename T>
		cbor_value& operator=(T& value) {
			contents = value;
			return *this;
		}

		template<typename T>
		cbor_value& operator=(T&& value) {
			contents = gp::move(value);
			return *this;
		}


		auto new_array() {
			return gp::vector<cbor_value>{alloc};
		}

		auto new_object() {
			return gp::vector<gp::pair<cbor_value, cbor_value>>{alloc};
		}
	};
}