mirror of
https://github.com/matrix-construct/construct
synced 2024-09-06 16:55:22 +02:00
317 lines
5.9 KiB
C++
317 lines
5.9 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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using namespace ircd;
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mapi::header
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IRCD_MODULE
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{
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"Federation :General Library and Utils"
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};
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namespace ircd::m::feds
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{
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template<class T>
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struct request;
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template<class T>
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static bool
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handler(const opts &, const closure &, std::list<request<T>> &);
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template<class T>
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static std::list<request<T>>
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creator(const opts &, const std::function<T (request<T> &, const string_view &origin)> &);
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}
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template<class T>
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struct ircd::m::feds::request
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:T
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{
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char origin[256];
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char buf[8_KiB];
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request(const std::function<T (request &)> &closure)
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:T(closure(*this))
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{}
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request(request &&) = delete;
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request(const request &) = delete;
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};
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///////////////////////////////////////////////////////////////////////////////
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//
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// m/feds.h
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//
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::perspective(const opts &opts,
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const closure &closure)
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{
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const auto make_request{[&opts]
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(auto &request, const auto &origin)
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{
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m::v1::key::query::opts v1opts;
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v1opts.dynamic = false;
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v1opts.remote = string_view
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{
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request.origin, strlcpy{request.origin, origin}
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};
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const m::v1::key::server_key server_key
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{
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opts.arg[0], opts.arg[1]
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};
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return m::v1::key::query
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{
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{&server_key, 1}, request.buf, std::move(v1opts)
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};
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}};
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auto requests
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{
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creator<m::v1::key::query>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::version(const opts &opts,
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const closure &closure)
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{
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static const auto make_request{[]
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(auto &request, const auto &origin)
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{
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m::v1::version::opts opts;
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opts.dynamic = false;
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opts.remote = string_view
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{
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request.origin, strlcpy{request.origin, origin}
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};
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return m::v1::version
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{
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request.buf, std::move(opts)
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};
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}};
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auto requests
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{
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creator<m::v1::version>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::backfill(const opts &opts,
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const closure &closure)
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{
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const auto make_request{[&opts]
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(auto &request, const auto &origin)
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{
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m::v1::backfill::opts v1opts;
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v1opts.dynamic = true;
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v1opts.event_id = opts.event_id;
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v1opts.limit = opts.argi[0];
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v1opts.remote = string_view
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{
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request.origin, strlcpy{request.origin, origin}
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};
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return m::v1::backfill
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{
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opts.room_id, request.buf, std::move(v1opts)
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};
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}};
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auto requests
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{
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creator<m::v1::backfill>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::state(const opts &opts,
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const closure &closure)
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{
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const auto make_request{[&opts]
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(auto &request, const auto &origin)
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{
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m::v1::state::opts v1opts;
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v1opts.dynamic = true;
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v1opts.ids_only = opts.arg[0] == "ids";
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v1opts.event_id = opts.event_id;
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v1opts.remote = string_view
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{
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strlcpy{request.origin, origin}
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};
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return m::v1::state
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{
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opts.room_id, request.buf, std::move(v1opts)
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};
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}};
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auto requests
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{
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creator<m::v1::state>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::event(const opts &opts,
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const closure &closure)
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{
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const auto make_request{[&opts]
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(auto &request, const auto &origin)
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{
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m::v1::event::opts v1opts;
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v1opts.dynamic = true;
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v1opts.remote = string_view
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{
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request.origin, strlcpy{request.origin, origin}
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};
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return m::v1::event
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{
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opts.event_id, request.buf, std::move(v1opts)
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};
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}};
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auto requests
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{
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creator<m::v1::event>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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bool
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IRCD_MODULE_EXPORT
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ircd::m::feds::head(const opts &opts,
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const closure &closure)
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{
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const auto make_request{[&opts]
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(auto &request, const auto &origin)
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{
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m::v1::make_join::opts v1opts;
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v1opts.remote = string_view
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{
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strlcpy{request.origin, origin}
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};
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return m::v1::make_join
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{
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opts.room_id, opts.user_id, request.buf, std::move(v1opts)
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};
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}};
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auto requests
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{
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creator<m::v1::make_join>(opts, make_request)
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};
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return handler(opts, closure, requests);
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// (internal)
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//
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template<class T>
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std::list<m::feds::request<T>>
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ircd::m::feds::creator(const opts &opts,
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const std::function<T (request<T> &, const string_view &origin)> &closure)
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{
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assert(opts.room_id);
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const m::room::origins origins
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{
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opts.room_id
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};
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std::list<m::feds::request<T>> ret;
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origins.for_each([&ret, &closure]
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(const string_view &origin)
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{
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if(!server::errmsg(origin)) try
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{
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ret.emplace_back([&closure, &origin]
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(auto &request)
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{
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return closure(request, origin);
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});
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}
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catch(const std::exception &)
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{
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return;
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}
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});
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return ret;
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}
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template<class T>
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bool
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ircd::m::feds::handler(const opts &opts,
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const closure &closure,
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std::list<request<T>> &reqs)
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{
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const auto when
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{
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now<steady_point>() + opts.timeout
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};
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while(!reqs.empty())
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{
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auto next
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{
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ctx::when_any(begin(reqs), end(reqs))
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};
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if(!next.wait_until(when, std::nothrow))
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break;
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const auto it
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{
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next.get()
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};
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auto &req{*it}; try
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{
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const auto code{req.get()};
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const json::array &array{req.in.content};
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const json::object &object{req.in.content};
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if(!closure({req.origin, {}, object, array}))
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return false;
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}
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catch(const std::exception &)
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{
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const ctx::exception_handler eptr;
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if(!closure({req.origin, eptr}))
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return false;
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}
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reqs.erase(it);
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}
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return true;
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}
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