mirror of
https://github.com/matrix-construct/construct
synced 2024-11-29 18:22:50 +01:00
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 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_ROOM_HEAD_FETCH_H
|
|
|
|
/// Fetch and determine the latest head information from all servers.
|
|
struct ircd::m::room::head::fetch
|
|
{
|
|
struct opts;
|
|
using closure = std::function<bool (const m::event &)>;
|
|
|
|
static conf::item<milliseconds> timeout;
|
|
|
|
/// Count of responding servers.
|
|
size_t respond {0};
|
|
|
|
/// Counts of servers reporting depth [behind, equal, ahead] relative to us.
|
|
size_t depth[3] {0};
|
|
|
|
/// Count of servers reporting origin_server_ts [behind, equal, ahead].
|
|
size_t ots[3] {0};
|
|
|
|
/// Total number of heads reported from all servers (including duplicates)
|
|
size_t heads {0};
|
|
|
|
/// Total number of concurrences for non-existent heads
|
|
size_t concur {0};
|
|
|
|
/// Total number of concurrences for existing heads.
|
|
size_t exists {0};
|
|
|
|
/// Running (and final) results when opts.unique=true; otherwise the
|
|
/// closure is the only way to receive results.
|
|
std::set<event::id::buf, std::less<>> head;
|
|
|
|
// Primary operation; synchronous construction with results provided to
|
|
// closure asynchronously.
|
|
fetch(const opts &, const closure & = {});
|
|
|
|
// Convenience operation
|
|
static event one(const mutable_buffer &, const id &, const string_view &remote, const id::user & = {});
|
|
static event::id::buf one(const id &, const string_view &remote, const id::user & = {});
|
|
};
|
|
|
|
struct ircd::m::room::head::fetch::opts
|
|
{
|
|
/// Room apropos.
|
|
m::id::room room_id;
|
|
|
|
/// User for non-public rooms; note if not given one will be determined
|
|
/// automatically.
|
|
m::id::user user_id;
|
|
|
|
/// Local reference frame; determined internally if not provided.
|
|
std::tuple<m::id::event, int64_t, event::idx> top
|
|
{
|
|
m::id::event{}, 0L, 0UL
|
|
};
|
|
|
|
/// Limits total results
|
|
size_t max_results {-1UL};
|
|
|
|
/// Limits results per server (spec sez 20)
|
|
size_t max_results_per_server {32};
|
|
|
|
/// When true, results are stored in the head set and duplicate results
|
|
/// are not provided to the closure. When false, the head set is not used.
|
|
bool unique {true};
|
|
|
|
/// When true, results may include events this server already has executed.
|
|
bool existing {false};
|
|
};
|