mirror of
https://github.com/matrix-construct/construct
synced 2024-12-27 07:54:05 +01:00
147 lines
2.9 KiB
C++
147 lines
2.9 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.
|
|
|
|
namespace ircd::m::relation
|
|
{
|
|
static void handle_fetch(const event &, vm::eval &);
|
|
extern hookfn<vm::eval &> fetch_hook;
|
|
extern conf::item<seconds> fetch_timeout;
|
|
extern conf::item<bool> fetch_enable;
|
|
}
|
|
|
|
ircd::mapi::header
|
|
IRCD_MODULE
|
|
{
|
|
"Matrix relations"
|
|
};
|
|
|
|
decltype(ircd::m::relation::fetch_enable)
|
|
ircd::m::relation::fetch_enable
|
|
{
|
|
{ "name", "ircd.m.relation.fetch.enable" },
|
|
{ "default", true },
|
|
};
|
|
|
|
decltype(ircd::m::relation::fetch_timeout)
|
|
ircd::m::relation::fetch_timeout
|
|
{
|
|
{ "name", "ircd.m.relation.fetch.timeout" },
|
|
{ "default", 5L },
|
|
};
|
|
|
|
decltype(ircd::m::relation::fetch_hook)
|
|
ircd::m::relation::fetch_hook
|
|
{
|
|
handle_fetch,
|
|
{
|
|
{ "_site", "vm.fetch" },
|
|
}
|
|
};
|
|
|
|
void
|
|
ircd::m::relation::handle_fetch(const event &event,
|
|
vm::eval &eval)
|
|
try
|
|
{
|
|
assert(eval.opts);
|
|
const auto &opts{*eval.opts};
|
|
if(!opts.fetch_prev)
|
|
return;
|
|
|
|
if(!fetch_enable)
|
|
return;
|
|
|
|
if(my(event))
|
|
return;
|
|
|
|
// event must be in a room for now; we won't have context until dht
|
|
if(!json::get<"room_id"_>(event))
|
|
return;
|
|
|
|
const auto &content
|
|
{
|
|
json::get<"content"_>(event)
|
|
};
|
|
|
|
const json::object &m_relates_to
|
|
{
|
|
content["m.relates_to"]
|
|
};
|
|
|
|
if(!m_relates_to || json::type(m_relates_to) != json::OBJECT)
|
|
return;
|
|
|
|
const event::id &event_id
|
|
{
|
|
m_relates_to.get<json::string>("event_id")
|
|
};
|
|
|
|
// If the relates_to is a prev_event then the vm::fetch unit will perform
|
|
// the fetch so this will just be redundant and we can bail.
|
|
const event::prev prev{event};
|
|
if(prev.prev_events_has(event_id))
|
|
return;
|
|
|
|
if(likely(m::exists(event_id)))
|
|
return;
|
|
|
|
log::dwarning
|
|
{
|
|
log, "%s in %s by %s relates to missing %s; fetching...",
|
|
string_view(event.event_id),
|
|
string_view(at<"room_id"_>(event)),
|
|
string_view(at<"sender"_>(event)),
|
|
string_view(event_id),
|
|
};
|
|
|
|
m::fetch::opts fetch_opts;
|
|
fetch_opts.op = m::fetch::op::event;
|
|
fetch_opts.room_id = at<"room_id"_>(event);
|
|
fetch_opts.event_id = event_id;
|
|
auto request
|
|
{
|
|
m::fetch::start(fetch_opts)
|
|
};
|
|
|
|
const auto response
|
|
{
|
|
request.get(seconds(fetch_timeout))
|
|
};
|
|
|
|
const m::event result
|
|
{
|
|
json::object
|
|
{
|
|
response
|
|
}
|
|
};
|
|
|
|
auto eval_opts(opts);
|
|
eval_opts.fetch_prev = false;
|
|
eval_opts.fetch_state = false;
|
|
vm::eval
|
|
{
|
|
result, eval_opts
|
|
};
|
|
}
|
|
catch(const ctx::interrupted &)
|
|
{
|
|
throw;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
log::derror
|
|
{
|
|
log, "Failed to fetch relation for %s in %s :%s",
|
|
string_view(event.event_id),
|
|
string_view(json::get<"room_id"_>(event)),
|
|
e.what(),
|
|
};
|
|
}
|