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construct/include/ircd/m/event.h

149 lines
4.1 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_H
namespace ircd::m
{
struct event;
bool my(const id::event &);
bool my(const event &);
size_t degree(const event &);
std::string pretty(const event &);
std::string pretty_oneline(const event &);
id::event event_id(const event &, id::event::buf &buf, const const_buffer &hash);
id::event event_id(const event &, id::event::buf &buf);
id::event event_id(const event &);
}
#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;
// Common convenience aliases
using id = m::id::event;
using closure = std::function<void (const event &)>;
using closure_bool = std::function<bool (const event &)>;
using super_type::tuple;
using super_type::operator=;
event(const id &, const mutable_buffer &buf);
event() = default;
};
#pragma GCC diagnostic pop
namespace ircd::m
{
void for_each(const event::prev &, const std::function<void (const event::id &)> &);
size_t degree(const event::prev &);
size_t count(const event::prev &);
std::string pretty(const event::prev &);
std::string pretty_oneline(const event::prev &);
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsubobject-linkage"
struct ircd::m::event::prev
:json::tuple
<
json::property<name::auth_events, json::array>,
json::property<name::prev_state, json::array>,
json::property<name::prev_events, json::array>
>
{
enum cond :int;
std::tuple<event::id, string_view> auth_events(const uint &idx) const;
std::tuple<event::id, string_view> prev_states(const uint &idx) const;
std::tuple<event::id, string_view> prev_events(const uint &idx) const;
event::id auth_event(const uint &idx) const;
event::id prev_state(const uint &idx) const;
event::id prev_event(const uint &idx) const;
using super_type::tuple;
using super_type::operator=;
};
#pragma GCC diagnostic pop
struct ircd::m::event::fetch
:event
{
std::array<db::cell, event::size()> cell;
db::row row;
bool valid(const event::id &) const;
fetch(const event::id &, std::nothrow_t);
fetch(const event::id &);
fetch();
friend bool seek(fetch &, const event::id &, std::nothrow_t);
friend void seek(fetch &, const event::id &);
};
inline bool
ircd::m::event::fetch::valid(const event::id &event_id)
const
{
return row.valid(event_id);
}
inline bool
ircd::m::my(const event &event)
{
return my(event::id(at<"event_id"_>(event)));
}
inline bool
ircd::m::my(const id::event &event_id)
{
return self::host(event_id.host());
}