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construct/modules/federation/make_leave.cc
2018-04-18 15:04:46 -07:00

125 lines
3 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.
using namespace ircd;
mapi::header
IRCD_MODULE
{
"Federation :Request a prototype for creating a leave event."
};
const string_view
make_leave_description
{R"(
Sends a partial event to the remote with enough information for them to
create a leave event 'in the blind' for one of their users.
)"};
resource
make_leave_resource
{
"/_matrix/federation/v1/make_leave/",
{
make_leave_description,
resource::DIRECTORY
}
};
resource::response
get__make_leave(client &client,
const resource::request &request)
{
if(request.parv.size() < 1)
throw m::NEED_MORE_PARAMS
{
"room_id path parameter required"
};
m::room::id::buf room_id
{
url::decode(request.parv[0], room_id)
};
if(request.parv.size() < 2)
throw m::NEED_MORE_PARAMS
{
"user_id path parameter required"
};
m::user::id::buf user_id
{
url::decode(request.parv[1], user_id)
};
int64_t depth;
m::id::event::buf prev_event_id;
std::tie(prev_event_id, depth, std::ignore) = m::top(room_id);
const m::event::fetch evf
{
prev_event_id, std::nothrow
};
const auto &auth_events
{
json::get<"auth_events"_>(evf)?
json::get<"auth_events"_>(evf) : json::array{"[]"}
};
const json::value prev[]
{
{ string_view{prev_event_id} },
{ json::get<"hashes"_>(evf) }
};
const json::value prevs[]
{
{ prev, 2 }
};
thread_local char bufs[96_KiB];
mutable_buffer buf{bufs};
json::iov content, event, wrapper;
const json::iov::push push[]
{
{ event, { "origin", request.origin }},
{ event, { "origin_server_ts", time<milliseconds>() }},
{ event, { "room_id", room_id }},
{ event, { "type", "m.room.member" }},
{ event, { "sender", user_id }},
{ event, { "state_key", user_id }},
{ event, { "depth", depth + 1 }},
{ event, { "membership", "leave" }},
{ content, { "membership", "leave" }},
{ event, { "auth_events", auth_events }},
{ event, { "prev_state", "[]" }},
{ event, { "prev_events", { prevs, 1 } }},
{ event, { "content", stringify(buf, content) }},
{ wrapper, { "event", stringify(buf, event) }},
};
return resource::response
{
client, wrapper
};
}
resource::method
method_get
{
make_leave_resource, "GET", get__make_leave,
{
method_get.VERIFY_ORIGIN
}
};