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construct/modules/client/room_keys/room_keys.cc

94 lines
2 KiB
C++

// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2023 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.
#include "room_keys.h"
ircd::mapi::header
IRCD_MODULE
{
"Client :e2e Room Keys"
};
std::tuple<int64_t, int64_t>
ircd::m::count_etag(const room::state &state,
const event::idx &version)
{
char version_buf[64];
const auto version_str
{
lex_cast(version, version_buf)
};
uint64_t count(0), etag(0);
state.for_each("ircd.room_keys.key", [&]
(const string_view &type, const string_view &state_key, const event::idx &event_idx)
{
const auto &[room_id, session_id, _version_str]
{
unmake_state_key(state_key)
};
if(_version_str != version_str)
return true;
etag += event_idx;
count += 1;
return true;
});
return
{
int64_t(count),
int64_t(etag),
};
}
std::tuple<ircd::string_view, ircd::string_view, ircd::string_view>
ircd::m::unmake_state_key(const string_view &state_key)
{
assert(state_key);
string_view part[3];
const auto parts
{
tokens(state_key, ":::", part)
};
assert(parts == 3);
if(unlikely(!m::valid(id::ROOM, part[0])))
part[0] = {};
if(unlikely(!lex_castable<ulong>(part[2])))
part[2] = {};
return std::make_tuple
(
part[0], part[1], part[2]
);
}
ircd::string_view
ircd::m::make_state_key(const mutable_buffer &buf,
const string_view &room_id,
const string_view &session_id,
const event::idx &version)
{
assert(room_id);
assert(m::valid(id::ROOM, room_id));
assert(session_id);
assert(session_id != "sessions");
assert(version != 0);
return fmt::sprintf
{
buf, "%s:::%s:::%u",
room_id,
session_id,
version,
};
}