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construct/include/ircd/m/event/event.h
2018-12-01 15:05:50 -08:00

103 lines
4.3 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_M_EVENT_EVENT_H
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsubobject-linkage"
/// The Main Event
///
/// This json::tuple provides at least all of the legal members of the matrix
/// standard event. This is the fundamental building block of the matrix
/// system. Rooms are collections of events. Messages between servers are
/// passed as bundles of events (or directly).
///
/// It is better to have 100 functions operate on one data structure than
/// to have 10 functions operate on 10 data structures.
/// -Alan Perlis
///
struct ircd::m::event
:json::tuple
<
json::property<name::auth_events, json::array>,
json::property<name::content, json::object>,
json::property<name::depth, int64_t>,
json::property<name::event_id, json::string>,
json::property<name::hashes, json::object>,
json::property<name::membership, json::string>,
json::property<name::origin, json::string>,
json::property<name::origin_server_ts, time_t>,
json::property<name::prev_events, json::array>,
json::property<name::prev_state, json::array>,
json::property<name::redacts, json::string>,
json::property<name::room_id, json::string>,
json::property<name::sender, json::string>,
json::property<name::signatures, json::object>,
json::property<name::state_key, json::string>,
json::property<name::type, json::string>
>
{
struct prev;
struct fetch;
struct conforms;
using keys = json::keys<event>;
// Common convenience aliases
using id = m::id::event;
using idx = uint64_t;
using closure = std::function<void (const event &)>;
using closure_bool = std::function<bool (const event &)>;
using closure_idx = std::function<void (const idx &)>;
using closure_idx_bool = std::function<bool (const idx &)>;
using closure_iov_mutable = std::function<void (json::iov &)>;
static constexpr size_t MAX_SIZE = 64_KiB;
static conf::item<size_t> max_size;
friend event essential(event, const mutable_buffer &content);
static void essential(json::iov &event, const json::iov &content, const closure_iov_mutable &);
static bool verify(const string_view &, const ed25519::pk &, const ed25519::sig &sig);
static bool verify(const json::object &, const ed25519::pk &, const ed25519::sig &sig);
friend bool verify(const event &, const ed25519::pk &, const ed25519::sig &sig);
friend bool verify(const event &, const ed25519::pk &, const string_view &origin, const string_view &pkid);
friend bool verify(const event &, const string_view &origin, const string_view &pkid); // io/yield
friend bool verify(const event &, const string_view &origin); // io/yield
friend bool verify(const event &); // io/yield
static ed25519::sig sign(const string_view &, const ed25519::sk &);
static ed25519::sig sign(const string_view &);
static ed25519::sig sign(const json::object &, const ed25519::sk &);
static ed25519::sig sign(const json::object &);
friend ed25519::sig sign(const event &, const ed25519::sk &);
friend ed25519::sig sign(const event &);
static ed25519::sig sign(json::iov &event, const json::iov &content, const ed25519::sk &);
static ed25519::sig sign(json::iov &event, const json::iov &content);
static json::object signatures(const mutable_buffer &, json::iov &event, const json::iov &content);
friend event signatures(const mutable_buffer &, const m::event &);
friend bool verify_sha256b64(const event &, const string_view &);
friend bool verify_hash(const event &, const sha256::buf &);
friend bool verify_hash(const event &);
friend sha256::buf hash(const event &);
static sha256::buf hash(json::iov &event, const string_view &content);
static json::object hashes(const mutable_buffer &, json::iov &event, const string_view &content);
friend json::object hashes(const mutable_buffer &, const event &);
using super_type::tuple;
using super_type::operator=;
event(const idx &, const mutable_buffer &buf);
event(const id &, const mutable_buffer &buf);
event() = default;
};
#pragma GCC diagnostic pop