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construct/ircd/m/v1.cc
2018-04-10 13:20:31 -07:00

1031 lines
25 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.
#include <ircd/m/m.h>
///////////////////////////////////////////////////////////////////////////////
//
// v1/groups.h
//
ircd::m::v1::groups::publicised::publicised(const id::node &node,
const vector_view<const id::user> &user_ids,
const mutable_buffer &buf_,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = node.host();
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = node.host();
if(!defined(json::get<"uri"_>(opts.request)))
json::get<"uri"_>(opts.request) = "/_matrix/federation/v1/get_groups_publicised";
json::get<"method"_>(opts.request) = "POST";
mutable_buffer buf{buf_};
const string_view user_ids_
{
json::stringify(buf, user_ids.data(), user_ids.data() + user_ids.size())
};
assert(!defined(json::get<"content"_>(opts.request)));
json::get<"content"_>(opts.request) = stringify(buf, json::members
{
{ "user_ids", user_ids_ }
});
// (front of buf was advanced by stringify)
opts.out.content = json::get<"content"_>(opts.request);
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
consume(buf, size(opts.out.head));
opts.in.head = buf;
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/send.h
//
void
ircd::m::v1::send::response::for_each_pdu(const pdus_closure &closure)
const
{
const json::object &pdus
{
this->get("pdus")
};
for(const auto &member : pdus)
{
const id::event &event_id{member.first};
const json::object &error{member.second};
closure(event_id, error);
}
}
ircd::m::v1::send::send(const string_view &txnid,
const const_buffer &content,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
assert(!!opts.remote);
assert(!size(opts.out.content));
opts.out.content = content;
assert(!defined(json::get<"content"_>(opts.request)));
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[1024], txnidbuf[512];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/send/%s/",
url::encode(txnid, txnidbuf),
};
}
json::get<"method"_>(opts.request) = "PUT";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/public_rooms.h
//
ircd::m::v1::public_rooms::public_rooms(const net::hostport &remote,
const mutable_buffer &buf)
:public_rooms
{
remote, buf, opts{}
}
{
}
ircd::m::v1::public_rooms::public_rooms(const net::hostport &remote,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = remote;
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[3072], query[2048], since[1024], tpid[1024];
std::stringstream qss;
pubsetbuf(qss, query);
if(opts.since)
qss << "&since="
<< url::encode(opts.since, since);
if(opts.third_party_instance_id)
qss << "&third_party_instance_id="
<< url::encode(opts.third_party_instance_id, tpid);
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/publicRooms?limit=%zu%s%s",
opts.limit,
opts.include_all_networks? "&include_all_networks=true" : "",
view(qss, query)
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/backfill.h
//
ircd::m::v1::backfill::backfill(const room::id &room_id,
const mutable_buffer &buf)
:backfill
{
room_id, buf, opts{}
}
{
}
ircd::m::v1::backfill::backfill(const room::id &room_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = room_id.host();
m::event::id::buf event_id_buf;
if(!opts.event_id)
{
event_id_buf = fetch_head(room_id, opts.remote);
opts.event_id = event_id_buf;
}
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], eidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/backfill/%s/?limit=%zu&v=%s",
url::encode(room_id, ridbuf),
opts.limit,
url::encode(opts.event_id, eidbuf),
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/state.h
//
ircd::m::v1::state::state(const room::id &room_id,
const mutable_buffer &buf)
:state
{
room_id, buf, opts{}
}
{
}
ircd::m::v1::state::state(const room::id &room_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = room_id.host();
m::event::id::buf event_id_buf;
if(!opts.event_id)
{
event_id_buf = fetch_head(room_id, opts.remote);
opts.event_id = event_id_buf;
}
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], eidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/%s/%s/?event_id=%s",
opts.ids_only? "state_ids" : "state",
url::encode(room_id, ridbuf),
url::encode(opts.event_id, eidbuf),
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/event_auth.h
//
ircd::m::v1::event_auth::event_auth(const m::room::id &room_id,
const m::event::id &event_id,
const mutable_buffer &buf)
:event_auth
{
room_id, event_id, buf, opts{}
}
{
}
ircd::m::v1::event_auth::event_auth(const m::room::id &room_id,
const m::event::id &event_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = event_id.host();
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], eidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/event_auth/%s/%s",
url::encode(room_id, ridbuf),
url::encode(event_id, eidbuf),
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/event.h
//
ircd::m::v1::event::event(const m::event::id &event_id,
const mutable_buffer &buf)
:event
{
event_id, buf, opts{}
}
{
}
ircd::m::v1::event::event(const m::event::id &event_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = event_id.host();
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[1024], eidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/event/%s/",
url::encode(event_id, eidbuf),
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/invite.h
//
ircd::m::v1::invite::invite(const room::id &room_id,
const id::event &event_id,
const json::object &content,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
assert(!!opts.remote);
assert(!size(opts.out.content));
opts.out.content = content;
assert(!defined(json::get<"content"_>(opts.request)));
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], eidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/invite/%s/%s",
url::encode(room_id, ridbuf),
url::encode(event_id, eidbuf)
};
}
json::get<"method"_>(opts.request) = "PUT";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/send_join.h
//
ircd::m::v1::send_join::send_join(const room::id &room_id,
const id::event &event_id,
const const_buffer &content,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
assert(!!opts.remote);
assert(!size(opts.out.content));
opts.out.content = content;
assert(!defined(json::get<"content"_>(opts.request)));
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], uidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/send_join/%s/%s",
url::encode(room_id, ridbuf),
url::encode(event_id, uidbuf)
};
}
json::get<"method"_>(opts.request) = "PUT";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/make_join.h
//
ircd::m::v1::make_join::make_join(const room::id &room_id,
const id::user &user_id,
const mutable_buffer &buf)
:make_join
{
room_id, user_id, buf, opts{}
}
{
}
ircd::m::v1::make_join::make_join(const room::id &room_id,
const id::user &user_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = room_id.host();
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"content"_>(opts.request)))
json::get<"content"_>(opts.request) = json::object{opts.out.content};
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], ridbuf[768], uidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/make_join/%s/%s",
url::encode(room_id, ridbuf),
url::encode(user_id, uidbuf)
};
}
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/user.h
//
ircd::m::v1::user::devices::devices(const id::user &user_id,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
if(!opts.remote)
opts.remote = user_id.host();
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048], uidbuf[768];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/user/devices/%s",
url::encode(user_id, uidbuf)
};
}
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"method"_>(opts.request)))
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/query.h
//
namespace ircd::m::v1
{
thread_local char query_arg_buf[1024];
thread_local char query_url_buf[1024];
}
ircd::m::v1::query::client_keys::client_keys(const id::user &user_id,
const string_view &device_id,
const mutable_buffer &buf)
:client_keys
{
user_id, device_id, buf, opts{user_id.host()}
}
{
}
ircd::m::v1::query::client_keys::client_keys(const id::user &user_id,
const string_view &device_id,
const mutable_buffer &buf,
opts opts)
:query{[&]() -> query
{
const json::value device_ids[]
{
{ device_id }
};
const json::members body
{
{ "device_keys", json::members
{
{ string_view{user_id}, { device_ids, 1 } }
}}
};
mutable_buffer out{buf};
const string_view content
{
stringify(out, body)
};
json::get<"content"_>(opts.request) = content;
return
{
"client_keys", string_view{}, out, std::move(opts)
};
}()}
{
}
ircd::m::v1::query::user_devices::user_devices(const id::user &user_id,
const mutable_buffer &buf)
:user_devices
{
user_id, buf, opts{user_id.host()}
}
{
}
ircd::m::v1::query::user_devices::user_devices(const id::user &user_id,
const mutable_buffer &buf,
opts opts)
:query
{
"user_devices",
fmt::sprintf
{
query_arg_buf, "user_id=%s", url::encode(user_id, query_url_buf)
},
buf,
std::move(opts)
}
{
}
ircd::m::v1::query::directory::directory(const id::room_alias &room_alias,
const mutable_buffer &buf)
:directory
{
room_alias, buf, opts{room_alias.host()}
}
{
}
ircd::m::v1::query::directory::directory(const id::room_alias &room_alias,
const mutable_buffer &buf,
opts opts)
:query
{
"directory",
fmt::sprintf
{
query_arg_buf, "room_alias=%s", url::encode(room_alias, query_url_buf)
},
buf,
std::move(opts)
}
{
}
ircd::m::v1::query::profile::profile(const id::user &user_id,
const mutable_buffer &buf)
:profile
{
user_id, buf, opts{user_id.host()}
}
{
}
ircd::m::v1::query::profile::profile(const id::user &user_id,
const mutable_buffer &buf,
opts opts)
:query
{
"profile",
fmt::sprintf
{
query_arg_buf, "user_id=%s", url::encode(user_id, query_url_buf)
},
buf,
std::move(opts)
}
{
}
ircd::m::v1::query::profile::profile(const id::user &user_id,
const string_view &field,
const mutable_buffer &buf)
:profile
{
user_id, field, buf, opts{user_id.host()}
}
{
}
ircd::m::v1::query::profile::profile(const id::user &user_id,
const string_view &field,
const mutable_buffer &buf,
opts opts)
:query
{
"profile",
fmt::sprintf
{
query_arg_buf, "user_id=%s%s%s",
url::encode(string_view{user_id}, query_url_buf),
!empty(field)? "&field=" : "",
field
},
buf,
std::move(opts)
}
{
}
ircd::m::v1::query::query(const string_view &type,
const string_view &args,
const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
assert(!!opts.remote);
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
{
thread_local char urlbuf[2048];
json::get<"uri"_>(opts.request) = fmt::sprintf
{
urlbuf, "/_matrix/federation/v1/query/%s%s%s",
type,
args? "?"_sv : ""_sv,
args
};
}
if(defined(json::get<"content"_>(opts.request)))
opts.out.content = json::get<"content"_>(opts.request);
if(!defined(json::get<"method"_>(opts.request)))
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/version.h
//
ircd::m::v1::version::version(const mutable_buffer &buf,
opts opts)
:server::request{[&]
{
assert(!!opts.remote);
if(!defined(json::get<"origin"_>(opts.request)))
json::get<"origin"_>(opts.request) = my_host();
if(!defined(json::get<"destination"_>(opts.request)))
json::get<"destination"_>(opts.request) = host(opts.remote);
if(!defined(json::get<"uri"_>(opts.request)))
json::get<"uri"_>(opts.request) = "/_matrix/federation/v1/version";
json::get<"method"_>(opts.request) = "GET";
opts.out.head = opts.request(buf);
if(!size(opts.in))
{
opts.in.head = buf + size(opts.out.head);
opts.in.content = opts.dynamic?
mutable_buffer{}: // server::request will allocate new mem
opts.in.head; // server::request will auto partition
}
return server::request
{
opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
};
}()}
{
}
///////////////////////////////////////////////////////////////////////////////
//
// v1/v1.h
//
ircd::conf::item<ircd::milliseconds>
fetch_head_timeout
{
{ "name", "ircd.m.v1.fetch_head.timeout" },
{ "default", 30 * 1000L },
};
ircd::m::event::id::buf
ircd::m::v1::fetch_head(const id::room &room_id,
const net::hostport &remote)
{
return fetch_head(room_id, remote, m::me.user_id);
}
ircd::m::event::id::buf
ircd::m::v1::fetch_head(const id::room &room_id,
const net::hostport &remote,
const id::user &user_id)
{
const unique_buffer<mutable_buffer> buf
{
16_KiB
};
make_join::opts opts;
opts.remote = remote;
make_join request
{
room_id, user_id, buf, std::move(opts)
};
request.wait(milliseconds(fetch_head_timeout));
request.get();
const json::object proto
{
request.in.content
};
const json::array prev_events
{
proto.at({"event", "prev_events"})
};
const json::array prev_event
{
prev_events.at(0)
};
const auto &prev_event_id
{
prev_event.at(0)
};
return unquote(prev_event_id);
}