mirror of
https://github.com/matrix-construct/construct
synced 2024-11-25 16:22:35 +01:00
631 lines
12 KiB
C++
631 lines
12 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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namespace ircd::m::typing
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{
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static system_point calc_timesout(milliseconds relative);
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static bool update_state(const edu &);
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static m::event::id::buf set_typing(const edu &);
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static void _handle_edu(const m::event &, const edu &);
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static void handle_edu(const m::event &, m::vm::eval &);
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static void timeout_timeout(const typist &);
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static void timeout_check();
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static void timeout_worker();
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extern log::log log;
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extern ctx::dock dock;
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extern ctx::mutex mutex;
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extern std::set<typist, typist> typists;
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extern conf::item<milliseconds> timeout_max;
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extern conf::item<milliseconds> timeout_min;
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extern conf::item<milliseconds> timeout_int;
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extern hookfn<vm::eval &> on_eval;
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extern context timeout_context;
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}
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decltype(ircd::m::typing::log)
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ircd::m::typing::log
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{
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"m.typing"
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};
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decltype(ircd::m::typing::dock)
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ircd::m::typing::dock;
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decltype(ircd::m::typing::mutex)
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ircd::m::typing::mutex;
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decltype(ircd::m::typing::typists)
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ircd::m::typing::typists;
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decltype(ircd::m::typing::timeout_max)
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ircd::m::typing::timeout_max
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{
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{ "name", "ircd.typing.timeout.max" },
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{ "default", 90 * 1000L },
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};
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decltype(ircd::m::typing::timeout_min)
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ircd::m::typing::timeout_min
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{
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{ "name", "ircd.typing.timeout.min" },
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{ "default", 15 * 1000L },
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};
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decltype(ircd::m::typing::timeout_int)
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ircd::m::typing::timeout_int
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{
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{ "name", "ircd.typing.timeout.int" },
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{ "default", 5 * 1000L },
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};
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decltype(ircd::m::typing::timeout_context)
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ircd::m::typing::timeout_context
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{
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"typing",
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768_KiB,
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context::POST,
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timeout_worker,
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};
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static const ircd::run::changed
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timeout_context_terminate
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{
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ircd::run::level::QUIT, []
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{
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ircd::m::typing::timeout_context.terminate();
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}
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};
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/// Hooks all federation typing edus from remote servers as well as
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/// the above commit from local clients. This hook rewrites the edu into
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/// a new event formatted for client /sync and then runs that through eval
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/// so our clients can receive the typing events.
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///
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decltype(ircd::m::typing::on_eval)
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ircd::m::typing::on_eval
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{
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handle_edu,
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{
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{ "_site", "vm.eval" },
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{ "type", "m.typing" },
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}
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};
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void
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ircd::m::typing::timeout_worker()
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try
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{
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for(;; ctx::sleep(milliseconds(timeout_int)))
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{
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dock.wait([]() noexcept
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{
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return !typists.empty();
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});
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const std::lock_guard lock
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{
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mutex
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};
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timeout_check();
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}
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}
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catch(const std::exception &e)
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{
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log::critical
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{
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log, "Typing timeout worker fatal :%s",
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e.what()
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};
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}
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void
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ircd::m::typing::timeout_check()
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try
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{
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const ctx::uninterruptible ui;
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const auto now
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{
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ircd::now<system_point>()
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};
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for(auto it(begin(typists)); it != end(typists); )
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{
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if(it->timesout < now)
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{
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timeout_timeout(*it);
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it = typists.erase(it);
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ctx::interruption_point();
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}
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else ++it;
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}
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}
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catch(const std::exception &e)
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{
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log::critical
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{
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log, "Typing timeout check :%s",
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e.what(),
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};
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}
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void
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ircd::m::typing::timeout_timeout(const typist &t)
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try
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{
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assert(run::level == run::level::RUN);
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const edu edu
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{
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{ "user_id", t.user_id },
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{ "room_id", t.room_id },
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{ "typing", false },
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};
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log::debug
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{
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log, "Typing timeout for %s in %s",
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string_view{t.user_id},
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string_view{t.room_id}
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};
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m::event event;
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json::get<"origin"_>(event) = my_host();
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json::get<"type"_>(event) = "m.typing"_sv;
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// Call this manually because it currently composes the event
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// sent to clients to stop the typing for this timed out user.
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_handle_edu(event, edu);
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}
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catch(const std::exception &e)
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{
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log::error
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{
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log, "Typing timeout for %s in %s :%s",
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string_view{t.user_id},
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string_view{t.room_id},
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e.what(),
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};
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}
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void
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ircd::m::typing::handle_edu(const m::event &event,
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m::vm::eval &eval)
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try
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{
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const json::object &content
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{
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at<"content"_>(event)
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};
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_handle_edu(event, content);
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}
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catch(const ctx::interrupted &)
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{
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throw;
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}
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catch(const std::exception &e)
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{
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log::derror
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{
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log, "m.typing from %s :%s",
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json::get<"origin"_>(event),
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e.what(),
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};
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throw;
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}
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void
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ircd::m::typing::_handle_edu(const m::event &event,
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const edu &edu)
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{
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// This check prevents interference between the two competing edu formats;
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// The federation edu has a room_id field while the client edu only has a
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// user_id's array. We don't need to hook on the client edu here.
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if(!json::get<"room_id"_>(edu))
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return;
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const auto &origin
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{
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at<"origin"_>(event)
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};
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const m::room::id &room_id
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{
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at<"room_id"_>(edu)
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};
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const m::user::id &user_id
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{
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at<"user_id"_>(edu)
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};
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// Check if this server can send an edu for this user. We make an exception
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// for our server to allow the timeout worker to use this codepath.
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if(!my_host(origin) && user_id.host() != origin)
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{
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log::dwarning
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{
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log, "Ignoring %s from %s for alien %s",
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at<"type"_>(event),
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origin,
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string_view{user_id}
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};
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return;
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}
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// Check if we're even interested in data for this room.
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if(!my_host(origin))
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if(!m::local_joined(room_id))
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{
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log::dwarning
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{
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log, "Ignoring %s from '%s' in %s :no local users joined.",
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at<"type"_>(event),
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origin,
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string_view{room_id},
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};
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return;
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}
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// Check if this server can write to the room based on the m.room.server_acl.
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if(!my_host(origin))
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if(m::room::server_acl::enable_write && !m::room::server_acl::check(room_id, origin))
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{
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log::dwarning
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{
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log, "Ignoring %s from '%s' in %s :denied by m.room.server_acl.",
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at<"type"_>(event),
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origin,
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string_view{room_id},
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};
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return;
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}
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// Update the typing state map for edu's from other servers only; the
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// state map was already updated for our clients in the committer. Also
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// condition for skipping redundant updates here too based on the state.
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if(!my_host(origin))
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{
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// Check if the user is actually in the room. The check is in this
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// branch for remote servers only because our committer above did this
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// already for our client.
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const m::room room{room_id};
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if(!membership(room, user_id, "join"))
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{
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log::dwarning
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{
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log, "Ignoring %s from %s for user %s because not in room '%s'",
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at<"type"_>(event),
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origin,
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string_view{user_id},
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string_view{room_id},
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};
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return;
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}
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// Set the (non-spec) timeout field of the edu which remote servers
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// don't/can't set and then update the state. Use the maximum timeout
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// value here because the minimum might unfairly time them out.
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auto _edu(edu);
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const milliseconds max(timeout_max), min(timeout_min);
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json::get<"timeout"_>(_edu) = std::clamp(json::get<"timeout"_>(_edu), min.count(), max.count());
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if(!update_state(_edu))
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return;
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}
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set_typing(edu);
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}
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ircd::m::event::id::buf
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ircd::m::typing::set_typing(const edu &edu)
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{
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assert(json::get<"room_id"_>(edu));
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const m::user::id &user_id
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{
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at<"user_id"_>(edu)
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};
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const m::user user
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{
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user_id
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};
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if(!exists(user))
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create(user);
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const m::user::room user_room
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{
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user
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};
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const auto &timeout
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{
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json::get<"timeout"_>(edu)?
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json::get<"timeout"_>(edu):
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json::get<"typing"_>(edu)?
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milliseconds(timeout_max).count():
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0L
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};
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const auto evid
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{
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send(user_room, user_id, "ircd.typing",
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{
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{ "room_id", at<"room_id"_>(edu) },
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{ "typing", json::get<"typing"_>(edu) },
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{ "timeout", timeout },
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})
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};
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char pbuf[32];
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log::info
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{
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log, "%s %s typing in %s timeout:%s",
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string_view{user_id},
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json::get<"typing"_>(edu)?
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"started"_sv:
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"stopped"_sv,
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at<"room_id"_>(edu),
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util::pretty(pbuf, milliseconds(timeout), 1),
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};
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return evid;
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}
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bool
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ircd::m::typing::update_state(const edu &object)
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try
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{
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const auto &user_id
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{
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at<"user_id"_>(object)
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};
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const auto &room_id
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{
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at<"room_id"_>(object)
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};
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const auto &typing
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{
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at<"typing"_>(object)
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};
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const milliseconds timeout
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{
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at<"timeout"_>(object)
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};
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const std::lock_guard lock
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{
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mutex
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};
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auto it
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{
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typists.lower_bound(user_id)
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};
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const bool was_typing
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{
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it != end(typists) && it->user_id == user_id
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};
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if(typing && !was_typing)
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{
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typists.emplace_hint(it, typist
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{
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calc_timesout(timeout), user_id, room_id
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});
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dock.notify_one();
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}
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else if(typing && was_typing)
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{
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auto &t(mutable_cast(*it));
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t.timesout = calc_timesout(timeout);
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}
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else if(!typing && was_typing)
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{
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typists.erase(it);
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}
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const bool transmit
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{
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(typing && !was_typing) || (!typing && was_typing)
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};
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log::debug
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{
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log, "Typing %s in %s now[%b] was[%b] xmit[%b]",
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string_view{at<"user_id"_>(object)},
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string_view{at<"room_id"_>(object)},
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json::get<"typing"_>(object),
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was_typing,
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transmit
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};
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return transmit;
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}
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catch(const std::exception &e)
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{
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log::error
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{
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log, "Failed to update state :%s",
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e.what(),
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};
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throw;
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}
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ircd::system_point
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ircd::m::typing::calc_timesout(milliseconds timeout)
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{
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timeout = std::max(timeout, milliseconds(timeout_min));
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timeout = std::min(timeout, milliseconds(timeout_max));
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return now<system_point>() + timeout;
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}
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/// typing commit handler stack (local user)
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///
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/// This function is called via ircd::m::typing linkage to create a typing
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/// event originating from our client. This event takes the form of the
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/// federation edu and is broadcast to servers. Unfortunately the matrix
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/// client spec has a different edu format for typing; so to propagate this
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/// event to clients we hook it during eval and create a new event formatted
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/// for clients and then run that through eval too. (see below).
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///
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ircd::m::typing::commit::commit(const edu &edu)
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{
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using json::at;
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// Check if the user is actually in the room.
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const m::room room
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{
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at<"room_id"_>(edu)
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};
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// Only allow user to send typing events to rooms they are joined...
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if(!membership(room, at<"user_id"_>(edu), "join"))
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throw m::FORBIDDEN
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{
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"Cannot type in a room %s to which you are not joined",
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string_view{room.room_id}
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};
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// If the user does not want to transmit typing events to this room,
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// bail out here.
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if(!allow(at<"user_id"_>(edu), room, "send"))
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return;
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// Clients like Riot will send erroneous and/or redundant typing requests
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// for example requesting typing=false when the state already =false.
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// We don't want to tax the vm::eval for this noise so we try to update
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// state first and if that returns false it indicates we should ignore.
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if(!update_state(edu))
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return;
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|
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json::iov event, content;
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const json::iov::push push[]
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{
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{ event, { "type", "m.typing" } },
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{ event, { "room_id", at<"room_id"_>(edu) } },
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{ content, { "user_id", at<"user_id"_>(edu) } },
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{ content, { "room_id", at<"room_id"_>(edu) } },
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{ content, { "typing", json::get<"typing"_>(edu) } },
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};
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m::vm::copts opts;
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opts.edu = true;
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opts.prop_mask.reset();
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opts.prop_mask.set("origin");
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m::vm::eval
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{
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event, content, opts
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};
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}
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bool
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ircd::m::typing::allow(const user::id &user_id,
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const room::id &room_id,
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const string_view &allow_type)
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{
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const user::room user_room
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{
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user_id
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};
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const room::state state
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{
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user_room
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};
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char buf[event::TYPE_MAX_SIZE+1]
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{
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"ircd.typing.disable."
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};
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const string_view &type
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{
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strlcat{buf, allow_type}
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};
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const string_view &state_key
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{
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room_id
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};
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return !state.has(type, state_key);
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}
|
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|
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bool
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ircd::m::typing::for_each(const closure &closure)
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{
|
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const std::lock_guard lock
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{
|
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mutex
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};
|
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|
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for(const auto &t : typists)
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{
|
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const time_t timeout
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{
|
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system_clock::to_time_t(t.timesout)
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};
|
|
|
|
const edu event
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{
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{ "user_id", t.user_id },
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{ "room_id", t.room_id },
|
|
{ "typing", true },
|
|
{ "timeout", timeout },
|
|
};
|
|
|
|
if(!closure(event))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
//
|
|
// typist struct
|
|
//
|
|
|
|
bool
|
|
ircd::m::typing::typist::operator()(const typist &a,
|
|
const string_view &b)
|
|
const noexcept
|
|
{
|
|
return a.user_id < b;
|
|
}
|
|
|
|
bool
|
|
ircd::m::typing::typist::operator()(const string_view &a,
|
|
const typist &b)
|
|
const noexcept
|
|
{
|
|
return a < b.user_id;
|
|
}
|
|
|
|
bool
|
|
ircd::m::typing::typist::operator()(const typist &a,
|
|
const typist &b)
|
|
const noexcept
|
|
{
|
|
return a.user_id < b.user_id;
|
|
}
|