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construct/matrix/bridge.cc

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// 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::bridge
{
static thread_local char tmp[4][512];
}
decltype(ircd::m::bridge::log)
ircd::m::bridge::log
{
"m.bridge"
};
ircd::json::object
ircd::m::bridge::protocol(const mutable_buffer &buf,
const config &config,
const string_view &name)
{
const string_view &uri
{
make_uri(tmp[0], config, fmt::sprintf
{
tmp[1], "thirdparty/protocol/%s",
url::encode(tmp[2], name),
})
};
switch(const query query{config, uri, buf}; query.code)
{
case http::OK:
return json::object
{
query.request.in.content
};
default:
throw http::error
{
query.code
};
}
}
bool
ircd::m::bridge::exists(const config &config,
const m::user::id &user_id)
{
const string_view &uri
{
make_uri(tmp[0], config, fmt::sprintf
{
tmp[1], "users/%s",
url::encode(tmp[2], user_id),
})
};
switch(const query query{config, uri}; query.code)
{
case http::OK: return true;
case http::NOT_FOUND: return false;
default:
throw http::error
{
query.code
};
}
}
bool
ircd::m::bridge::exists(const config &config,
const m::room::alias &room_alias)
{
const string_view &uri
{
make_uri(tmp[0], config, fmt::sprintf
{
tmp[1], "rooms/%s",
url::encode(tmp[2], room_alias),
})
};
switch(const query query{config, uri}; query.code)
{
case http::OK: return true;
case http::NOT_FOUND: return false;
default:
throw http::error
{
query.code
};
}
}
ircd::string_view
ircd::m::bridge::make_uri(const mutable_buffer &buf,
const config &config,
const string_view &path)
{
const rfc3986::uri base_url
{
at<"url"_>(config)
};
char hs_token[256];
return fmt::sprintf
{
buf, "%s/_matrix/app/v1/%s?access_token=%s",
base_url.path,
path,
url::encode(hs_token, at<"hs_token"_>(config)),
};
}
//
// query
//
decltype(ircd::m::bridge::query::timeout)
ircd::m::bridge::query::timeout
{
{ "name", "ircd.m.bridge.query.timeout" },
{ "default", 10L },
};
ircd::m::bridge::query::query(const config &config,
const string_view &uri,
const mutable_buffer &in_body)
:base_url
{
at<"url"_>(config)
}
,buf
{
8_KiB
}
,uri
{
uri
}
,window
{
buf
}
,hypertext
{
window,
base_url.remote,
"GET",
uri,
}
,sopts
{
false, // http_exceptions
}
,request
{
net::hostport
{
base_url.remote
},
server::out
{
window.completed(),
{}
},
server::in
{
window.remains(),
empty(in_body)?
window.remains():
in_body
},
&sopts,
}
,code
{
request.get(seconds(timeout))
}
{
}
//
// config
//
bool
ircd::m::bridge::config::exists(const string_view &id)
{
return get(std::nothrow, id, []
(const auto &, const auto &, const auto &) noexcept
{
// no action
});
}
void
ircd::m::bridge::config::get(const string_view &id,
const closure &closure)
{
if(unlikely(!get(std::nothrow, id, closure)))
throw m::NOT_FOUND
{
"No bridge config found for '%s'",
id,
};
}
bool
ircd::m::bridge::config::get(std::nothrow_t,
const string_view &id,
const closure &closure)
{
return !config::for_each([&id, &closure]
(const auto &event_idx, const auto &event, const config &config)
{
if(json::get<"id"_>(config) != id)
return true;
closure(event_idx, event, config);
return false;
});
}
bool
ircd::m::bridge::config::for_each(const closure_bool &closure)
{
return events::type::for_each_in("ircd.bridge", [&closure]
(const string_view &, const event::idx &event_idx)
{
const m::event::fetch event
{
std::nothrow, event_idx
};
if(unlikely(!event.valid))
return true;
if(!my(event))
return true;
if(!defined(json::get<"state_key"_>(event)))
return true;
const bridge::config config
{
json::get<"content"_>(event)
};
if(!json::get<"id"_>(config))
return true;
// the state_key has to match the id for now
if(json::get<"id"_>(config) != json::get<"state_key"_>(event))
return true;
// filter replaced state
if(room::state::next(event_idx))
return true;
// filter redacted state
if(redacted(event_idx))
return true;
const user::id sender
{
json::get<"sender"_>(event)
};
if(!is_oper(sender))
return true;
if(likely(closure(event_idx, event, config)))
return true;
return false;
});
}